FreeBSD/Linux Kernel Cross Reference
sys/contrib/dev/acpica/changes.txt

     ----------------------------------------
     31 March 2022. Summary of changes for version 20220331:
     
     0) Global changes:
     
     Update all copyright notices to the year 2022. This effects all source 
     modules, as well as utility signons.
     
     
    1) ACPICA kernel-resident subsystem:
    
    For the ASL Sleep() operator, issue a warning if the sleep value is 
    greater than 10 Milliseconds. Quick boottime is important, so warn about 
    sleeps greater than 10 ms. Distribution Linux kernels reach initrd in 350 
    ms, so excessive delays should be called out. 10 ms is chosen randomly, 
    but three of such delays would already make up ten percent of the 
    boottime.
    
    Namespace: Avoid attempting to walk the Namespace if the Namespace does 
    not exist.
    
    AML interpreter/iASL compiler: Add new Acpi 6.4 semantics for the 
    LoadTable and Load operators. DDB_HANDLE is gone, now loadtable returns a 
    pass/fail integer. Now load returns a pass/fail integer, as well as 
    storing the return value in an optional 2nd argument.
    
    Headers: Use uintptr_t and offsetof() in Linux kernel builds. To avoid 
    "performing pointer subtraction with a null pointer has undefined 
    behavior" compiler warnings, use uintptr_t and offsetof() that are always 
    available during Linux kernel builds to define ACPI_UINTPTR_T and the 
    ACPI_TO_INTEGER() and ACPI_OFFSET() macros when building the ACPICA code 
    in the Linux kernel.
    
    Added support for the Windows 11 _OSI string ("Windows 2021"). Submitted 
    by superm1.
    
    executer/exsystem: Inform users about ACPI spec violation for the Stall() 
    operator. Values greater than 100 microseconds violate the ACPI 
    specification, so warn users about it. From the ACPI Specification 
    version 6.2 Errata A, 19.6.128 *Stall (Stall for a Short Time)*:
    > The implementation of Stall is OS-specific, but must not relinquish
    > control of the processor. Because of this, delays longer than 100
    > microseconds must use Sleep instead of Stall.
    
    
    2) iASL Compiler/Disassembler and ACPICA tools:
    
    Data Table Compiler/Disassembler: Add support for the APMT table - ARM 
    Performance Monitoring Unit table. Submitted by @bwicaksononv.
    
    Data Table Compiler/Disassembler: For MADT, add support for the OEM-
    defined subtables (Types 0x80-0x7F).
    
    Data Table Compiler: Fixed a problem with support for the SDEV table, 
    where a subtable Length was not computed correctly.
    
    Data Table Compiler/Disassembler: Add/fix the CFMWS subtable to the CEDT 
    Acpi table support.
    
    Data Table Compiler/Disassembler: Fix a compile issue with the CEDT and 
    add template. Submitted by MasterDrogo.
    
    Data Table Compiler/Disassembler: NHLT Changes provided by Piotr Maziarz:
    iASL/NHLT: Rename linux specific structures to DeviceInfo to improve 
    readability of the code.
    iASL/NHLT: Fix parsing undocumented bytes at the end of Endpoint. 
    Undocumented bytes at the end of Endpoint Descriptor can be present 
    independently of Linux-specific structures. Their size can also vary.
    iASL/NHLT: Treat TableTerminator as SpecificConfig. SpecificConfig has 4 
    bytes of size and then an amount of bytes specified by size. All of the 
    terminators that I've seen had a size equal to 4, but theoretically it 
    can vary.
    
    iASL/AcpiExec: Use _exit instead of exit in signal handers (ctrl-C).
    
    iASL: Remove a remark due to excessive output. Removed a remark for 
    duplicate Offset() operators, due to a user complaint.
    
    ----------------------------------------
    17 December 2021. Summary of changes for version 20211217:
    
    1) ACPICA kernel-resident subsystem:
    
    Hardware: Do not flush CPU cache when entering S4 and S5. According to 
    ACPI 6.4, Section 16.2, the CPU cache flushing is required on entering to 
    S1, S2, and S3, but the ACPICA code flushes the CPU cache regardless of 
    the sleep state. Blind cache flush on entering S5 causes problems for 
    TDX.
    
    Avoid subobject buffer overflow when validating RSDP signature. Since the 
    Signature member is accessed through an ACPI_TABLE_HEADER, the pointer to 
    it is only to a 4-char array, and so trying to read past the 4th 
    character, as will be done when it is an RSDP, reads beyond the bounds of 
    the accessed member. Contributed by jrtc27.
    
    Add support for PCC Opregion special context data. PCC Opregion added in 
    ACPIC 6.3 requires special context data similar to GPIO and Generic 
    Serial Bus as it needs to know the internal PCC buffer and its length as 
    well as the PCC channel index when the opregion handler is being executed 
   by the OSPM. Adds support for the special context data needed by PCC 
   Opregion. Submitted by Sudeep Holla <sudeep.holla@arm.com>
   
   2) iASL Compiler/Disassembler and ACPICA tools:
   
   iASL: Completed compiler support for the NHLT ACPI table.
   
   iASL/NHLT table: Fixed a reported problem where a fault would occur 
   during disassembly of a "Linux-Specific" section if the "Specific Data" 
   part was not present.
   
   iASL: Added full support (compiler and disassembler) for the AGDI ACPI 
   table. Contributed by: Ilkka Koskinen <ilkka@os.amperecomputing.com>.
   
   iASL: Added full support for the TDEL ACPI table.
   
   iASL table compiler: FADT support updates:
   1) Allow the 32-bit DSDT address to be zero.
   2) Issue error if both the 32-bit and 64-bit DSDT addresses are zero.
   
   iASL: Fix unaligned accesses to local cache allocations. Contributed by 
   jrtc27.
   
   iASL: Open binary input files in binary mode, not text mode Affects 
   binary input AML files, as well as binary data table files, for 
   disassembly.
   
   ----------------------------------------
   30 September 2021. Summary of changes for version 20210930:
   
   This release is available at https://acpica.org/downloads
   
   1) ACPICA kernel-resident subsystem:
   
   Hardware: Avoid evaluating methods too early during system resume. During 
   wakeup from system-wide sleep states, AcpiGetSleepTypeData() is called 
   and it tries to get memory from the OS in order to evaluate a control 
   method, but if KFENCE is enabled in the Linux kernel, the memory 
   allocation attempt causes an IRQ work to be queued and a self-IPI to be 
   sent to the CPU running the code which requires the memory controller to 
   be ready, so if that happens too early in the wakeup path, it doesn't 
   work.
   
   Prevent that from taking place by calling AcpiGetSleepTypeData() for S0 
   upfront, when preparing to enter a given sleep state, and saving the data 
   obtained by it for later use during system wakeup.
   
   Added a new _OSI string, "Windows 2020". Posted by superm1.
   
   2) iASL Compiler/Disassembler and ACPICA tools:
   
   iASL compiler: Updated the check for usage of _CRS, _DIS, _PRS, and _SRS 
   objects:
   New/latest rules: Under a Device Object:
            1) If _PRS is present, must have _CRS and _SRS
            2) If _SRS is present, must have _PRS (_PRS requires _CRS and 
   _SRS)
            3) If _DIS is present, must have _SRS (_SRS requires _PRS, _PRS 
   requires _CRS and _SRS)
            4) If _SRS is present, probably should have a _DIS (Remark only)
   
   iASL table disassembler: Added disassembly support for the NHLT ACPI 
   table. Note: support for Vendor-defined microphone arrays and SNR 
   extensions are not supported at this time -- mostly due to a lack of 
   example tables. Actual compiler support for NHLT is forthcoming.
   
   Added a new subtable type for ACPI 6.4 SRAT Generic Port Affinity. It 
   uses the same subtable structure as the existing Generic Initiator 
   Affinity type.
   
   Added the flag for online capable in the MADT, introduced in ACPI 6.3. 
   Posted by superm1.
   
   3) ACPICA documentation: Updated the legal info (that appears at the 
   start of the Documents) to clarify distribution rights that are granted.
   
   
   ----------------------------------------
   30 July 2021. Summary of changes for version 20210730:
   
   This release is available at https://acpica.org/downloads
   
   1) ACPICA kernel-resident subsystem:
   
   2) iASL Compiler/Disassembler and ACPICA tools:
   
   iasl: Check usage of _CRS, _DIS, _PRS, and _SRS objects (July 2021).
     Under the Device Object:
     1) If _DIS is present, must have a _CRS and _SRS
     2) If _PRS is present, must have a _CRS, _DIS, and _SRS
     3) If _SRS is present, must have a _CRS and _DIS
   A warning will be issued for each of these cases.
   Note: For existing ASL/projects, these warnings may be disabled by 
   specifying this on the command line:
   "-vw 3141"
   
   iASL Table Disassembler/Table compiler: Fix for WPBT table with no
   command-line arguments. Handle the case where the Command-line
   Arguments table field does not exist (zero).
   
   Headers: Add new DBG2 Serial Port Subtypes
   The Microsoft Debug Port Table 2 (DBG2) specification revision
   September 21, 2020 comprises additional Serial Port Subtypes [1].
   Reflect that in the actbl1.h header file. Submitted by:
   semihalf-wojtas-marcin
   
   iASL: Add full support for the AEST table (data compiler)
   Includes support in the table compiler and the disassembler.
   
   Add PRMT module header to facilitate parsing.
   This structure is used in to parse PRMT in other Operating Systems
   that relies on using subtable headers in order to parse ACPI tables.
   Although the PRMT doesn't have "subtables" it has a list of module
   information structures that act as subtables.
   
   iASL: Table disassembler: Add missing strings to decode subtable types.
   Includes the MADT and CEDT tables.
   
   
   ----------------------------------------
   04 June 2021. Summary of changes for version 20210604:
   
   1) ACPICA kernel-resident subsystem:
   
   Cleaned up (delete) the context mutex during local address handler object 
   deletion.
   
   Fixed a memory leak caused by the _CID repair function.
   
   Added support for PlatformRtMechanism OperationRegion handler. Adds a new 
   utility function, AcpiUtConvertUuidToString. Writing a buffer to a 
   PlatformRtMechanism fieldunit invokes a bidirectional transaction. The 
   input buffer contains 26 bytes containing 9 bytes of status, a command 
   byte and a 16-byte UUID. This change will simply pass this incoming 
   buffer to a handler registered by the OS.
   
   2) iASL Compiler/Disassembler and ACPICA tools:
   
   Added full support for the PRMT ACPI table (Platform Runtime Mechanism 
   Table). Includes support in the iASL compiler, the disassembler, and the 
   template generator.
   
   Added full support for the BDAT (BIOS Data ACPI Table) ACPI table.
   
   Added full support for the RGRT (Regulatory Graphics Resource Table) ACPI 
   table.
   
   Added full support for the SVKL (Storage Volume Key Location Table) ACPI 
   table. Header file support from Kuppuswamy Sathyanarayanan 
   <sathyanarayanan.kuppuswamy@linux.intel.com>.
   
   Completed full support for the IVRS (I/O Virtualization Reporting 
   Structure) ACPI table. Added compiler support for IVRS, updated 
   disassembler support. Adds a new utility, UtIsIdInteger, to determine if 
   a HID/CID is an integer or a string.
   
   Headers: Added more structs to the CEDT table: CXL fixed memory window 
   structure.
   
   ACPI 6.4: MADT: added Multiprocessor Wakeup Mailbox Structure.
   
   ----------------------------------------
   31 March 2021. Summary of changes for version 20210331:
   
   This release is available at https://acpica.org/downloads, and includes 
   all ACPI 6.4 support
   
   1) ACPICA kernel-resident subsystem:
   ACPI 6.4: iASL: deprecate DDBHandleObj keyword
   Always create namespace nodes using AcpiNsCreateNode(). ACPICA is 
   allocating an object using kmalloc(), but then frees it
   using kmem_cache_free(<"Acpi-Namespace" kmem_cache>). This is wrong.
   Fixed a race condition in generic serial bus operation region handler. 
   Fixed by Hans de Goede.
   
   2) iASL Compiler/Disassembler and ACPICA tools:
   
   ACPI 6.4: NFIT: add Location Cookie field
   ACPI 6.4: HMAT: add new fields/flags
   ACPI 6.4: Add new flags in SRAT
   ACPI 6.4: add SDEV secure access components
   ACPI 6.4: add Csi2Bus resource template
   ACPI 6.4: add support for PHAT table
   ACPI 6.4: add support for PMTT table
   Add disassembly support for the IVRS table. Compilation of the table is 
   not yet complete.
   Fixed a potential infinite loop due to type mismatch. The for-loop is 
   using a UINT8 counter and comparing the upper
   limit against a UINT32 AslGbl_ExpectedMessagesIndex maximum. In
   the case where AslGbl_ExpectedMessagesIndex is > 255 the counter i
   will wrap around to zero and the loop will never exit. I suspect
   the AslGbl_ExpectedMessagesIndex is never that high, but fixing
   this does future proof the code and cleans up static analysis
   warnings.Colin King.
   iASL/TableCompiler: update it with IORT table E.b revision changes. From 
   shamiali2008.
   iASL/TableCompiler: Add compilation support for the VIOT table. Signed-
   off-by: Jean-Philippe Brucker.
   iASL/TableCompiler: Add compilation support for CEDT table. Also, update 
   the CEDT template.
   
   ----------------------------------------
   05 January 2021. Summary of changes for version 20210105:
   
   This release is available at https://acpica.org/downloads
   
   
   1) ACPICA kernel-resident subsystem:
   
   Updated all copyrights to 2021. This affects all ACPICA source code 
   modules.
   
   2) iASL Compiler/Disassembler and ACPICA tools:
   
   ASL test suite (ASLTS): Updated all copyrights to 2021.
   
   Tools and utilities: Updated all signon copyrights to 2021.
   
   iASL Table Compiler: Removed support for obsolete ACPI tables: VRTC, 
   MTMR. Al Stone.
   
   
   ----------------------------------------
   17 December 2020. Summary of changes for version 20201217:
   
   This release is available at https://acpica.org/downloads
   
   
   1) ACPICA kernel-resident subsystem:
   
   Note: The implementation of ACPI 6.4 is underway, and is expected to be 
   mostly finished next month, when ACPI 6.4 is released.
   
   From qzed:- fixed-ae-class-macros. Fix exception code class checks. Added 
   several new macros, such as ACPI_CNTL_EXCEPTION(Status) in order to 
   enable this.
   
   AcpiExec/iASL/AcpiHelp: Added a few changes for support of GCC 10.2.0. 
   These included a few casts, as well as a null pointer check.
   
   Fix -Wfallthrough: GCC 7.1 gained -Wimplicit-fallthrough to warn on 
   implicit fallthrough, as well as __attribute__((__fallthrough__)) and 
   comments to explicitly denote that cases of fallthrough were intentional. 
   Clang also supports this warning and statement attribute, but not the 
   comment form. Added a new macro, ACPI_FALLTHROUGH to support this feature 
   of GCC. With assistance from @nickdesaulniers. 
   
   2) iASL Compiler/Disassembler and ACPICA tools: 
   
   Added improvement to method call analysis by saving the return type and 
   relaxing certain cases of type checking.
   
   iASL Table Compiler: Improved info messages. Added a message to the -T 
   option for when the default template (DSDT) is used.
   Also added a note for when multiple SSDTs are created with a DSDT that 
   the SSDTs are created in the same file as the DSDT.
   
   
   ----------------------------------------
   
   13 November 2020. Summary of changes for version 20201113:
   
   This release is available at https://acpica.org/downloads
   
   
   1) ACPICA kernel-resident subsystem:
   
   Interpreter: fixed a memory leak by using use existing buffer in _HID 
   repair. There was a memory leak that occurred when a _CID object is 
   defined as a package containing string objects. When _CID is checked for 
   any possible repairs, it calls a helper function to repair _HID (because 
   _CID basically contains multiple _HID entries). The _HID repair function 
   assumes that string objects are standalone objects that are not contained 
   inside of any packages. The _HID repair function replaced the string 
   object with a brand new object and attempted to delete the old object by 
   decrementing the reference count of the old object. Strings inside of 
   packages have a reference count of 2 so the _HID repair function leaves 
   this object in a dangling state and causes a memory leak. Instead of 
   allocating a brand new object and removing the old object, use the 
   existing object when repairing the _HID object.
   
   Added function trace macros to improve namespace debugging. The namespace 
   repair mechanism does not have function tracing macros. Add several trace 
   macros to improve debuggability.
   
   Handle "orphan" _REG methods for GPIO OpRegions. Before this change 
   AcpiEvExecuteRegMethods() had special handling to handle "orphan" (no 
   matching OpRegion declared) _REG methods for EC nodes. On Intel Cherry 
   Trail devices there are 2 possible ACPI OpRegions for accessing GPIOs. 
   The standard GeneralPurposeIo OpRegion and the Cherry Trail - specific 
   UserDefined 0x9X OpRegions. Having 2 different types of OpRegions leads 
   to potential issues with checks for OpRegion availability, or in other 
   words checks if _REG has been called for the OpRegion which the ACPI code 
   wants to use. Except for the "orphan" EC handling, ACPICA core does not 
   call _REG on an ACPI node which does not define an OpRegion matching the 
   type being registered; and the reference design DSDT, from which most 
   Cherry Trail DSDTs are derived, does not define GeneralPurposeIo, nor 
   UserDefined(0x93) OpRegions for the GPO2 (UID 3) device, because no pins 
   were assigned ACPI controlled functions in the reference design. Together 
   this leads to the perfect storm, at least on the Cherry Trail based 
   Medion Akayo E1239T. This design does use a GPO2 pin from its ACPI code 
   and has added the Cherry Trail specific UserDefined(0x93) opregion to its 
   GPO2 ACPI node to access this pin. But it uses a "has _REG been called" 
   availability check for the standard GeneralPurposeIo OpRegion. This 
   clearly is a bug in the DSDT, but this does work under Windows. This 
   issue leads to the intel vbtn driver reporting the device always being in 
   tablet-mode at boot, even if it is in laptop mode. Which in turn causes 
   userspace to ignore touchpad events. So in other words, this issue causes 
   the touchpad to not work at boot. This change fixes this by extending the 
   "orphan" _REG method handling to also apply to GPIO address-space 
   handlers.
   
   
   2) iASL Compiler/Disassembler and ACPICA tools: 
   
   iASL: Added more info to namespace dump file (-ln option). In a separate 
   section of the dump file (after the main namespace dump), emit the full 
   pathname for each namespace node, its type, and the ASL filename and line 
   number where it is declared.
   
   AcpiHelp: Added an option to display/decode iASL exceptions. Option is: -
   x [Hex Value] where "Hex Value" is the iASL exception code. If Hex Value 
   is omitted, all iASL exceptions are displayed.
   
   iASL: Use StringLiteral instead of StringData for some ASL macros. The 
   use of the stringData rule allows for some "string" oriented opcodes 
   (Such as ToString, ToHexString, etc.) None of which make sense with the 
   macros in question. This change modifies the StringData part of the rule 
   for these macros to a simple string  literal - thus disallowing the use 
   of ToString, ToHexString, etc.
   The following ASL operators (macros) are affected:
   EisaId
   Fprintf
   Printf
   ToUuid
   Unicode
   Note: The MS compiler requires the use of string literals for these 
   operators also.
   
   iASL: Added a remark for an unknown UUID: ASL_MSG_UUID_NOT_FOUND. Search 
   the list of "known" UUIDs for the input to the ToUUID macro.
   
   Added 5 new UUIDs to the known UUID table. All related to NVDIMM and the 
   NFIT table.
   
   
   ----------------------------------------
   
   25 September 2020. Summary of changes for version 20200925:
   
   This release is available at https://acpica.org/downloads
   
   
   1) ACPICA kernel-resident subsystem:
   
   Preserve memory opregion mappings. The ACPICA's strategy with respect to 
   the handling of memory mappings associated with memory operation regions 
   is to avoid mapping the entire region at once which may be problematic at 
   least in principle (for example, it may lead to conflicts with 
   overlapping mappings having different attributes created by drivers).  It 
   may also be wasteful, because memory opregions on some systems take up 
   vastchunks of address space while the fields in those regions actually 
   accessed by AML are sparsely distributed.
   
   For this reason, a one-page "window" is mapped for a given opregion on 
   the first memory access through it and if that "window" does not cover an 
   address range accessed through that opregion subsequently, it is unmapped 
   and a new "window" is mapped to replace it.  Next, if the new "window" is 
   not sufficient to access memory through the opregion in question in the 
   future, it will be replaced with yet another "window" and so on.  That 
   may lead to a suboptimal sequence of memory mapping and unmapping 
   operations, for example if two fields in one opregion separated from each 
   other by a sufficiently wide chunk of unused address space are accessed 
   in an alternating pattern.
   
   Added support for 64 bit risc-v compilation.  Useful for acpica tools and 
   incorporating ACPICA into the Firmware Test Suite. Colin Ian King 
   <colin.king@canonical.com>.
   
   Added support for SMBus predefined names (from SMBus Control Method 
   Interface Specification, Version 1.0, December 10, 1999. New predefined 
   names:
       _SBA
       _SBI
       _SBR
       _SBT
       _SBW
   
   AML Disassembler: Added a new command, "All <NameSeg>". This command will 
   evaluate all objects in the current namespace whose NameString contains 
   the input NameSeg as the last element of the NameString. Useful for 
   debugging.
   
   
   2) iASL Compiler/Disassembler and ACPICA tools: 
   
   iASL: fixed a crash that occurred when predefined objects return packages 
   with lengths that exceed the initializer list.
   
   iASL: added more detail to external resolution error message when 
   compiling multiple definition blocks.
   
   iASL: added a remark for an attempt to create a nameseg or namestring 
   containing lower-case letters. This should prevent declaring multiple 
   namesegs or namestrings in an attempt to refer to different objects (with 
   different cases), but actually refer to the same object(s).
   
   iASL: improve alias analysis by saving object type. If the alias is a 
   method type, the parameter count is also recorded.
   
   AcpiExec: Increase the default loop timeout value. Was 1 second, is now 
   10 seconds. Prevents unnecessary timeouts when executing control methods 
   from the command line.
   
   AcpiHelp/disassembler: Added a bunch of "known" UUIDs to the internal 
   list. Includes:
       Memory Device
       Generic Buttons Device
       NVDIMM Root Device
       Control Method Battery
       Device Graphs for _DSD method
       Hierarchical Data Extension
   ....ARM CoreSight Graph
   
   ----------------------------------------
   
   
   17 July 2020. Summary of changes for version 20200717:
   
   This release is available at https://acpica.org/downloads
   
   
   1) ACPICA kernel-resident subsystem:
   
   Do not increment OperationRegion reference counts for field units. Recent 
   server firmware has revealed that this reference count can overflow on 
   large servers that declare many field units (thousands) under the same 
   OperationRegion. This occurs because each field unit declaration will add 
   a reference count to the source OperationRegion. This release solves the 
   reference count overflow for OperationRegion objects by preventing 
   fieldUnits from incrementing their parent OperationRegion's reference 
   count.
   
   Replaced one-element arrays with flexible-arrays, which were introduced 
   in C99.
   
   Restored the readme file containing the directions for generation of 
   ACPICA from source on MSVC 2017. Updated the file for MSVC 2017. File is 
   located at: generate/msvc2017/readme.txt
   
   2) iASL Compiler/Disassembler and ACPICA tools: 
   
   iASL: Fixed a regression found in version 20200214. Prevent iASL from 
   emitting an extra byte of garbage data when control methods declared a 
   single parameter type without using braces. This extra byte is known to 
   cause a blue screen on the Windows AML interpreter.
   
   iASL: Made a change to allow external declarations to specify the type of 
   a named object even when some name segments are not defined.
   This change allows the following ASL code to compile (When DEV0 is not 
   defined or not defined yet):
   
       External (\_SB.DEV0.OBJ1, IntObj)
       External (\_SB.DEV0, DeviceObj)
   
   iASL: Fixed a problem where method names in "Alias ()" statement could be 
   misinterpreted. They are now interpreted correctly as method invocations.
   
   iASL: capture a method parameter count (Within the Method info segment, 
   as well as the argument node) when using parameter type lists.
   
   ----------------------------------------
   
   
   28 May 2020. Summary of changes for version 20200528:
   
   
   1) ACPICA kernel-resident subsystem:
   
   Removed old/obsolete Visual Studio files which were used to build the 
   Windows versions of the ACPICA tools. Since we have moved to Visual 
   Studio 2017, we are no longer supporting Visual Studio 2006 and 2009 
   project files. The new subdirectory and solution file are located at:
   
       acpica/generate/msvc2017/AcpiComponents.sln
   
   
   2) iASL Compiler/Disassembler and ACPICA tools: 
   
   iASL: added support for a new OperationRegion Address Space (subtype): 
   PlatformRtMechanism. Support for this new keyword is being released for 
   early prototyping. It will appear in the next release of the ACPI 
   specification.
   
   iASL: do not optimize the NameString parameter of the CondRefOf operator. 
   In the previous iASL compiler release, the NameString parameter of the 
   CondRefOf was optimized. There is evidence that some implementations of 
   the AML interpreter do not perform the recursive search-to-parent search 
   during the execution of the CondRefOf operator. Therefore, the CondRefOf 
   operator behaves differently when the NameString parameter is a single 
   name segment (a NameSeg) as opposed to a full NamePath (starting at the 
   root scope) or a NameString containing parent prefixes.
   
   iASL: Prevent an inadvertent remark message. This change prevents a 
   remark if within a control method the following exist:
   1) An Operation Region is defined, and
   2) A Field operator is defined that refers to the region.
   This happens because at the top level, the Field operator does not 
   actually create a new named object, it simply references the operation 
   region.
   
   Removed support for the acpinames utility. The acpinames was a simple 
   utility used to populate and display the ACPI namespace without executing 
   any AML code. However, ACPICA now supports executable opcodes outside of 
   control methods. This means that executable AML opcodes such as If and 
   Store opcodes need to be executed during table load. Therefore, acpinames 
   would need to be updated to match the same behavior as the acpiexec 
   utility and since acpiexec can already dump the entire namespace (via the 
   'namespace' command), we no longer have the need to maintain acpinames.
   
       In order to dump the contents of the ACPI namespace using acpiexec,
   execute the following command from the command line:
   
           acpiexec -b "n" [aml files]
   
   ----------------------------------------
   
   
   30 April 2020. Summary of changes for version 20200430:
   
   1) ACPICA kernel-resident subsystem:
   
   Cleaned up the coding style of a couple of global variables 
   (AcpiGbl_NextCmdNum and AcpiProtocolLengths) caught by static analyzers. 
   AcpiProtocolLengths was made static, and the definition of 
   AcpiGbl_NextCmdNum was moved to acglobal.h.
   
   
   2) iASL Compiler/Disassembler and ACPICA tools: 
   
   iASL DataTable Compiler:  Fixed a segfault on errors that aren't directly 
   associated with a field.
   
   Disassembler: has been made more resilient so that it will continue to 
   parse AML even if the AML generates ACPI namespace errors. This enables 
   iASL to disassemble some AML that may have been compiled using older 
   versions of iASL that no longer compile with newer versions of iASL.
   
   iASL: Fixed the required parameters for _NIH and _NIG. Previously, there 
   was a mixup where _NIG required one parameter and _NIH required zero 
   parameters. This change swaps these parameter requirements. Now it is 
   required that _NIH must be called with one parameter and _NIG requires 
   zero parameters.
   
   iASL: Allow use of undefined externals as long as they are protected by 
   an if (CondRefOf (...)) block when compiling multiple definition blocks.
   
   iASL: Fixed the type override behavior of named objects that are declared 
   as External. External declarations will no longer override the type of 
   the actual definition if it already exists.
   
   AcpiNames: Added setargv.obj to the MSVC 2017 link sequence to enable 
   command line wildcard support on Windows. Note: the AcpiNames utility is 
   essentially redundant with the AcpiExec utility (using the "namespace" 
   command) and is therefore deprecated. It will be removed in future 
   releases of ACPICA.
   
   Disassembler: ignore AE_ALREADY_EXISTS status when parsing create* 
   operators. The disassembler is intended to emit existing ASL code as-is. 
   Therefore, error messages emitted during disassembly should be ignored or 
   handled in a way such that the disassembler can continue to parse the 
   AML. This change ignores AE_ALREADY_EXISTS errors during the deferred Op 
   parsing for create operators in order to complete parsing ASL termlists.
   
   iASL DataTable Compiler: IVRS table: fix potentially uninitialized 
   variable warning. Some compilers catch potential uninitialized variables. 
   This is done by examining branches of if/else statements. This change 
   replaces an "else if" with an "else" to fix the uninitialized variable 
   warning.
   
   
   ----------------------------------------
   26 March 2020. Summary of changes for version 20200326:
   
   
   1) ACPICA kernel-resident subsystem:
   
   Performed a code clean-up to prevent build errors on early versions of 
   GCC-10.
   
   Added the NHLT table signature. iASL data table compiler/disassembler 
   support for this table is coming soon.
   
   
   2) iASL Compiler/Disassembler and ACPICA tools: 
   
   AcpiExec: Fixed several problems with the namespace initialization file 
   (-fi<filename> option). Includes fixes to prevent AE_ALREADY_EXISTS 
   errors, several seg faults, and enhancements to line parsing within the 
   init file. In addition, each object found in the init file and it's new 
   value is displayed, as well as any such entries that do not have a 
   corresponding name in the namespace. For reference, the syntax for the 
   various supported data types are presented below:
           PCHG 0x777788889999BBBB // Integer
           \DEV1.STR1 "XYZ"                        // String
           BUF1 (88 99 AA)                 // Buffer
           PKG1 [0x1111 0x2222]            // Package
           \BF1 0x7980                             // BufferField
           RCRV 0x0123456789ABCDEF // Field Unit
   
   iASL: Added a custom iASL macro __EXPECT__(iASL-Error-Code). This macro 
   can be used anywhere in a given ASL file to configure iASL to expect an 
   iASL compiler error code on the line where this macro was placed. If the 
   error code does not exist, an error is generated. This is intended to be 
   used for ACPICA's ASL test suite, but can be used by ASL developers as 
   well.
   
   iASL: table compiler: Implemented IVRS IVHD type 11h parsing. The AMD 
   IVRS table parsing supported only IVHD type 10h structures. Parsing an 
   IVHD type 11h caused the iasl to report unknown subtable type. Add 
   necessary structure definition for IVHD type 11h and apply correct 
   parsing method based on subtable type. Micha? ?ygowski.
   
   iASL: table compiler: Fixed IVRS table IVHD type 10h reserved field name 
   According to AMD IOMMU Specification Revision 3.05 the reserved field 
   should be IOMMU Feature Reporting. Change the name of the field to the 
   correct one. Micha? ?ygowski.
   
   acpiexec: removed redeclaration of AcpiGbl_DbOpt_NoRegionSupport. Patch 
   based on suggestions by David Seifert and Benjamin Berg.
   
   iASL: table compiler: removed an unused variable (DtCompilerParserResult) 
   causing linking errors. Patch based on suggestions by David Seifert and 
   Benjamin Berg.
   
   iASL: table compiler: make LexBuffer static to avoid linking errors in 
   newer compilers. Patch based on suggestions by David Seifert and Benjamin 
   Berg.
   
   iASL: fixed type matching between External and Named objects. External 
   object types can only be expressed with ACPI object type values that are 
   defined in the ACPI spec. However, iASL uses ACPI object type values that 
   are local to ACPICA in addition to the values defined in the ACPI spec. 
   This change implements type matching to map some object type values 
   specific to ACPICA to ones that are defined in the ACPI spec.
   
   iASL: Dropped the type mismatch compiler error that can arise from 
   External declarations to a warning. This warning can occur when there is 
   a type difference between the external declaration and the actual object 
   declaration (when compiling multiple files/modules simultaneously).
   
   iASL: removed an incorrect error message regarding externals. This change 
   removes an incorrect error that is emitted when a duplicate external 
   declaration does not contain a type that opens a scope. This is incorrect 
   because the duplicate external with conflicting types are already caught 
   by iASL and it doesn't make any sense to enforce what this conflicting 
   type should be.
   
   AcpiXtract: fix AX_IS_TABLE_BLOCK_HEADER macro. This macro needs to be 
   surrounded by parens. Otherwise, a logical statement that applies a 
   logical not operator to this macro could result in a computation that 
   applies the operator to the left side of the logical and but not the 
   right. Reported-by: John Levon <john.levon@joyent.com>
   
   Fixed a problem with the local version of sprint(): On 32-bit, the 
   provided sprintf() is non-functional: with a size of ACPI_UINT32_MAX, 
   String + Size will wrap, meaning End < Start, and 
   AcpiUtBoundStringOutput() will never output anything as a result. The 
   symptom seen of this was acpixtract failing to output anything -- with a 
   custom build that included utprint.c. Signed-off-by: John Levon 
   <john.levon@joyent.com>
   
   iASL: Changed the "PlatformCommChannel" ASL keyword to "PCC", as per the 
   ACPI specification.
   
   
   ----------------------------------------
   14 February 2020. Summary of changes for version 20200214:
   
   
   1) ACPICA kernel-resident subsystem:
   
   Enable sleep button on ACPI legacy wake:  Hibernation (S4) is triggered 
   in a guest when it receives a sleep trigger from the hypervisor. When the 
   guest resumes from this power state, it does not see the SleepEnabled 
   bit. In other words, the sleepHibernation (S4) is triggered in a guest 
   when it receives a sleep trigger from the hypervisor. When the guest 
   resumes from this power state, it does not see the SleepEnabled bit. In 
   other words, the sleep button is not enabled on waking from an S4 state. 
   This causes subsequent invocation of sleep state to fail since the 
   guest.button is not enabled on waking from an S4 state. This causes 
   subsequent invocation of sleep state to fail in the guest. Fix this 
   problem by enabling the sleep button in ACPI legacy wake. From Anchal 
   Agarwal <anchalag@amazon.com>.
   
   Implemented a new external interface, AcpiAnyGpeStatusSet (). To be used 
   for checking the status bits of all enabled GPEs in one go. It is needed 
   to distinguish spurious SCIs from genuine ones when deciding whether or 
   not to wake up the system from suspend-to-idle.
   
   Generic Makefiles: replace HOST name with ACPI_HOST: Some machines may be 
   using HOST in their environment to represent the host name for their 
   machines. Avoid this problem by renaming this variable from HOST to 
   ACPI_HOST.
   
   MSVC 2017 project files: Enable multiprocessor generation to improve 
   build performance.
   
   Added a macro to get the byte width of a Generic Address structure. New 
   ACPI_ACCESS_BYTE_WIDTH is in addition to the existing 
   ACPI_ACCESS_BIT_WIDTH. From Mika Westerberg.
   
   
   2) iASL Compiler/Disassembler and ACPICA tools: 
   
   iASL: Implemented full support for the (optional, rarely used) ReturnType 
   and ParameterTypesList for the Method, Function, and External operators. 
   For Method declarations, the number of individual ParameterTypes must 
   match the declaration of the number of arguments (NumArgs). This also 
   Fixes a problem with the External operator where extra/extraneous bytes 
   were emitted in the AML code if the optional ReturnType/ParameterTypes 
   were specified for a MethodObj declaration.
   New error message:
   1) Method NumArgs count does not match length of ParameterTypes list
   
   iASL: Implemented detection of type mismatches between External 
   declarations and named object declarations. Also, detect type mismatches 
   between multiple External declarations of the same Name.
   New error messages:
   1) Type mismatch between external declaration and actual object 
   declaration detected
   2) Type mismatch between multiple external declarations detected
   
   iASL: Implemented new error messages for External operators that specify 
   a ReturnType and/or ParameterTypesList for any object type other than 
   control methods (MethodObj).
   New error messages:
   1) Return type is only allowed for Externals declared as MethodObj
   2) Parameter type is only allowed for Externals declared as MethodObj
   
   iASL: Implemented two new remark/warning messages for ASL code that 
   creates named objects from within a control method. This is very 
   inefficient since the named object must be created and deleted each time 
   the method is executed.
   New messages:
   1) Creation of named objects within a method is highly inefficient, use 
   globals or method local variables instead (remark)
   2) Static OperationRegion should be declared outside control method 
   (warning)
   
   iASL: Improved illegal forward reference detection by adding support to 
   detect forward-reference method invocations.
   
   iASL: Detect and issue an error message for NameStrings that contain too 
   many individual NameSegs (>255). This is an AML limitation that is 
   defined in the ACPI specification.
   New message:
   1) NameString contains too many NameSegs (>255)
   
   acpidump: windows: use GetSystemFirmwareTable API for all tables except 
   SSDT. By using this API, acpidump is able to get all tables in the XSDT
   
   iASL: Removed unused parser file and updated msvc2017 project files. 
   Removed the obsolete AslCompiler.y from the repository.
   
   iASL: msvc2017: Fixed macros in the file dependency list to prevent 
   unnecessary rebuilds. Replace %(Directory) with %(RelativeDir).
   
   Disassembler: Prevent spilling error messages to the output file. All 
   errors are directed to the console instead. These error messages 
   prevented re-compilation of the resulting disassembled ASL output file 
   (.DSL).
   
   
   ----------------------------------------
   10 January 2020. Summary of changes for version 20200110:
   
   
   1) ACPICA kernel-resident subsystem:
   
   Updated all copyrights to 2020. This affects all ACPICA source code 
   modules.
   
   
   2) iASL Compiler/Disassembler and ACPICA tools:
   
   ASL test suite (ASLTS): Updated all copyrights to 2020.
   
   Tools and utilities: Updated all signon copyrights to 2020.
   
   iASL: fix forward reference analysis for field declarations. Fixes 
   forward reference analysis for field declarations by searching the 
   parent scope for the named object when the object is not present in 
   the current scope.
   
   iASL: Improved the error output for ALREADY_EXISTS errors. Now, the 
   full pathname of the name that already exists is printed.
   
   iASL: Enhance duplicate Case() detection for buffers. Add check for 
   buffers with no initializer list (these buffers will be filled with 
   zeros at runtime.)
   
   
   ----------------------------------------
   13 December 2019. Summary of changes for version 20191213:
   
   
   1) ACPICA kernel-resident subsystem:
   
   Return a Buffer object for all fields created via the CreateField
   operator. Previously, an Integer would be returned if the size of
   the field was less than or equal to the current size of an Integer.
   Although this goes against the ACPI specification, it provides
   compatibility with other ACPI implementations. Also updated the
   ASLTS test suite to reflect this new behavior.
   
   2) iASL Compiler/Disassembler and ACPICA tools:
   
   iASL: Implemented detection of (and throw an error for) duplicate
   values for Case statements within a single Switch statement. Duplicate
   Integers, Strings, and Buffers are supported.
   
   iASL: Fix error logging issue during multiple file compilation --
   Switch to the correct input file during error node creation.
   
   iASL: For duplicate named object creation, now emit an error instead
   of a warning - since this will cause a runtime error.
   
   AcpiSrc: Add unix line-ending support for non-Windows builds.
   
   iASL: Add an error condition for an attempt to create a NameString
   with > 255 NameSegs (the max allowable via the AML definition).
   
   
   ----------------------------------------
   18 October 2019. Summary of changes for version 20191018:
   
   
   1) ACPICA kernel-resident subsystem:
   
   Debugger: added a new command: ?Fields [address space ID]?. This command 
   dumps the contents of all field units that are defined within the 
   namespace with a particular address space ID.
   
   Modified the external interface AcpiLoadTable() to return a table index. 
   This table index can be used for unloading a table for debugging.
       ACPI_STATUS
       AcpiLoadTable (
           ACPI_TABLE_HEADER       *Table,
           UINT32                  *TableIndex))
   
   Implemented a new external interface: AcpiUnloadTable() This new function 
   takes a table index as an argument and unloads the table. Useful for 
   debugging only.
       ACPI_STATUS
       AcpiUnloadTable (
           UINT32                  TableIndex))
   
   Ported the AcpiNames utility to use the new table initialization 
   sequence. The utility was broken before this change. Also, it was 
   required to include most of the AML interpreter into the utility in order 
   to process table initialization (module-level code execution.)
   
   Update for results from running Clang V8.0.1. This fixes all "dead 
   assignment" warnings. There are still several "Dereference of NULL 
   pointer" warnings, but these have been found to be false positive 
   warnings.
   
   
   2) iASL Compiler/Disassembler and ACPICA tools:
   
   iASL: numerous table compiler changes to ensure that the usage of 
   yacc/bison syntax is POSIX-compliant.
   
   iASL/disassembler: several simple bug fixes in the data table 
   disassembler.
   
   Acpiexec: expanded the initialization file (the -fi option) to initialize 
   strings, buffers, packages, and field units.
   
   
   ----------------------------------------
   16 August 2019. Summary of changes for version 20190816:
   
   This release is available at https://acpica.org/downloads
   
   
   1) ACPICA kernel-resident subsystem:
   
   Modified the OwnerId mechanism to allow for more Owner Ids. The previous 
   limit was 256 Ids, now it is 4096 Ids. This prevents OWNER_ID_LIMIT 
   exceptions on machines with a large number of initialization threads, 
   many CPU cores and nested initialization control methods.
   
   Introduced acpi_dispatch_gpe() as a wrapper around AcpiEvDetectGpe() for 
   checking if the given GPE (as represented by a GPE device handle and a 
   GPE number) is currently active and dispatching it (if that's the case) 
   outside of interrupt context.
   
   Table load: exit the interpreter before initializing objects within the 
  new table This prevents re-acquiring the interpreter lock when loading 
  tables
  
  Added the "Windows 2019" string to the _OSI support (version 1903). Jung-
  uk Kim
  
  Macros: removed pointer math on a null pointer. Causes warnings on some 
  compilers and/or tools. Changed ACPI_TO_POINTER to use ACPI_CAST_PTR 
  instead of using arithmetic.
  
  Fully deployed the ACPI_PRINTF_LIKE macro. This macro was not being used 
  across all "printf-like" internal functions. Also, cleanup all calls to 
  such functions (both in 32-bit mode and 64-bit mode) now that they are 
  analyzed by the gcc compiler via ACPI_PRINTF_LIKE.
  
  
  2) iASL Compiler/Disassembler and ACPICA tools:
  
  iASL: implemented a new data table compiler flex/bison front-end. This 
  change is internal and is not intended to result in changes to the 
  compiled code. This new compiler front-end can be invoked using the -tp 
  option for now, until the old mechanism is removed.
  
  ASLTS: Implemented a new data table compiler test suite. This test suite 
  generates all table templates and compile/disassemble/re-compile/binary-
  compare each file. 
  
  iASL: return -1 if AML files were not generated due to compiler errors
  
  iASL: added a warning on use of the now-legacy ASL Processor () keyword.
  
  iASL: added an error on _UID object declaration that returns a String 
  within a Processor () declaration. A _UID for a processor must be an 
  Integer.
  
  iASL: added a null terminator to name strings that consist only of 
  multiple parent prefixes (^)
  
  iASL: added support to compile both ASL and data table files in a single 
  command.
  
  Updated the tool generation project files that were recently migrated to 
  MSVC 2017 to eliminate all new warnings. The new project files appear in 
  the directory \acpica\generate\msvc2017. This change effectively 
  deprecates the older project files in \acpica\generate\msvc9.
  
  
  ----------------------------------------
  03 July 2019. Summary of changes for version 20190703:
  
  
  1) ACPICA kernel-resident subsystem:
  
  Remove legacy module-level support code. There were still some remnants 
  of the legacy module-level code executions. Since we no longer support 
  this option, this is essentially dead code and has been removed from the 
  ACPICA source.
  
  iASL: ensure that _WAK, _PTS, _TTS, and _Sx are declared only at the root 
  scope. If these named objects are declared outside the root scope, they 
  will not be invoked by any host Operating System.
  
  Clear status of GPEs on first direct enable. ACPI GPEs (other than the EC 
  one) can be enabled in two situations. First, the GPEs with existing _Lxx 
  and _Exx methods are enabled implicitly by ACPICA during system 
  initialization.  Second, the GPEs without these methods (like GPEs listed 
  by _PRW objects for wakeup devices) need to be enabled directly by the 
  code that is going to use them (e.g. ACPI power management or device 
  drivers).
  
  In the former case, if the status of a given GPE is set to start with, 
  its handler method (either _Lxx or _Exx) needs to be invoked to take care 
  of the events (possibly) signaled before the GPE was enabled. In the 
  latter case, however, the first caller of AcpiEnableGpe() for a given GPE 
  should not be expected to care about any events that might be signaled 
  through it earlier.  In that case, it is better to clear the status of 
  the GPE before enabling it, to prevent stale events from triggering 
  unwanted actions (like spurious system resume, for example).
  
  For this reason, modify AcpiEvAddGpeReference() to take an additional 
  boolean argument indicating whether or not the GPE status needs to be 
  cleared when its reference counter changes from zero to one and make 
  AcpiEnableGpe() pass TRUE to it through that new argument.
  
  
  2) iASL Compiler/Disassembler and ACPICA tools:
  
  The tool generation process has been migrated to MSVC 2017, and all 
  project files have been upgraded. The new project files appear in the 
  directory \acpica\generate\msvc2017. This change effectively deprecates 
  the older project files in \acpica\generate\msvc9.
  
  iASL: ensure that _WAK, _PTS, _TTS, and _Sx are declared only at the root 
  scope. If these named objects are declared outside the root scope, they 
  will not be invoked by any host Operating System
  
  ----------------------------------------
  09 May 2019. Summary of changes for version 20190509:
  
  
  1) ACPICA kernel-resident subsystem:
  
  Revert commit  6c43e1a ("ACPICA: Clear status of GPEs before enabling 
  them") that causes problems with Thunderbolt controllers to occur if a 
  dock device is connected at init time (the xhci_hcd and thunderbolt 
  modules crash which prevents peripherals connected through them from 
  working). Commit 6c43e1a effectively causes commit ecc1165b8b74 ("ACPICA: 
  Dispatch active GPEs at init time") to get undone, so the problem 
  addressed by commit ecc1165b8b74 appears again as a result of it.
  
  
  2) iASL Compiler/Disassembler and ACPICA tools:
  
  Reverted iASL: Additional forward reference detection. This change 
  reverts forward reference detection for field declarations. The feature 
  unintentionally emitted AML bytecode with incorrect package lengths for 
  some ASL code related to Fields and OperationRegions. This malformed AML 
  can cause systems to crash
  during boot. The malformed AML bytecode is emitted in iASL version 
  20190329 and 20190405.
  
  iASL: improve forward reference detection. This change improves forward 
  reference detection for named objects inside of scopes. If a parse object 
  has the OP_NOT_FOUND_DURING_LOAD set, it means that Op is a reference to 
  a named object that is declared later in the AML bytecode. This is 
  allowed if the reference is inside of a method and the declaration is 
  outside of a method like so:
  
  DefinitionBlock(...)
  {
      Method (TEST)
      {
          Return (NUM0)
      }
      Name (NUM0,0)
  }
  
  However, if the declaration and reference are both in the same method or 
  outside any methods, this is a forward reference and should be marked as 
  an error because it would result in runtime errors.
  
  DefinitionBlock(...)
  {
      Name (BUFF, Buffer (NUM0) {}) // Forward reference
      Name (NUM0, 0x0)
  
      Method (TEST)
      {
          Local0 = NUM1
          Name (NUM1, 0x1) // Forward reference
          return (Local0)
      }
  }
  
  iASL: Implemented additional buffer overflow analysis for BufferField 
  declarations. Check if a buffer index argument to a create buffer field 
  operation is beyond the end of the target buffer.
  
  This affects these AML operators:
   
     AML_CREATE_FIELD_OP
     AML_CREATE_BIT_FIELD_OP
     AML_CREATE_BYTE_FIELD_OP
     AML_CREATE_WORD_FIELD_OP
     AML_CREATE_DWORD_FIELD_OP
     AML_CREATE_QWORD_FIELD_OP
  
   There are three conditions that must be satisfied in order to allow this 
  validation at compile time:
   
     1) The length of the target buffer must be an integer constant
     2) The index specified in the create* must be an integer constant
     3) For CreateField, the bit length argument must be non-zero.
  
  Example:
      Name (BUF1, Buffer() {1,2})
      CreateField (BUF1, 7, 9, CF03)  // 3: ERR
  
  dsdt.asl     14:     CreateField (BUF1, 7, 9, CF03)  // 3: ERR
  Error    6165 -                           ^ Buffer index beyond end of 
  target buffer
  
  
  ----------------------------------------
  05 April 2019. Summary of changes for version 20190405:
  
  
  1) ACPICA kernel-resident subsystem:
  
  Event Manager: History: Commit 18996f2db918 ("ACPICA: Events: Stop 
  unconditionally clearing ACPI IRQs during suspend/resume") was added 
  earlier to stop clearing of event status bits unconditionally on suspend 
  and resume paths. Though this change fixed an issue on suspend path, it 
  introduced regressions on several resume paths. In the case of S0ix, 
  events are enabled as part of device suspend path. If status bits for the 
  events are set when they are enabled, it could result in premature wake 
  from S0ix. If status is cleared for any event that is being enabled so 
  that any stale events are cleared out. In case of S0ix, events are 
  enabled as part of device suspend path. If status bits for the events are 
  set when they are enabled, it could result in premature wake from S0ix.
  
  This change ensures that status is cleared for any event that is being 
  enabled so that any stale events are cleared out.
  
  
  2) iASL Compiler/Disassembler and ACPICA tools:
  
  iASL: Implemented an enhanced multiple file compilation that combines 
  named objects from all input files to a single namespace. With this 
  feature, any unresolved external declarations as well as duplicate named 
  object declarations can be detected during compilation rather than 
  generating errors much later at runtime. The following commands are 
  examples that utilize this feature:
      iasl dsdt.asl ssdt.asl
      iasl dsdt.asl ssdt1.asl ssdt2.asl
      iasl dsdt.asl ssdt*.asl
  
  ----------------------------------------
  29 March 2019. Summary of changes for version 20190329:
  
  
  1) ACPICA kernel-resident subsystem:
  
  Namespace support: Remove the address nodes from global list after method 
  termination. The global address list contains pointers to namespace nodes 
  that represent Operation Regions. This change properly removes Operation 
  Region namespace nodes that are declared dynamically during method 
  execution.
  
  Linux: Use a different debug default than ACPICA. There was a divergence 
  between Linux and the ACPICA codebases. In order to resolve this 
  divergence, Linux now declares its own debug default in aclinux.h
  
  Renamed some internal macros to improve code understanding and 
  maintenance. The macros below all operate on single 4-character ACPI 
  NameSegs, not generic strings (old -> new):
      ACPI_NAME_SIZE    -> ACPI_NAMESEG_SIZE
      ACPI_COMPARE_NAME -> ACPI_COMPARE_NAMESEG
      ACPI_MOVE_NAME    -> ACPI_COPY_NAMESEG
  
  Fix for missing comma in array declaration for the AcpiGbl_GenericNotify 
  table.
  
  Test suite: Update makefiles, add PCC operation region support
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Implemented additional illegal forward reference detection. Now 
  detect and emit an error upon detection of a forward reference from a 
  Field to an Operation Region. This will fail at runtime if allowed to 
  pass the compiler.
  
  AcpiExec: Add an address list check for dynamic Operation Regions. This 
  feature performs a sanity test for each node the global address list. 
  This is done in order to ensure that all dynamic operation regions are 
  properly removed from the global address list and no dangling pointers 
  are left behind.
  
  Disassembler: Improved generation of resource pathnames. This change 
  improves the code that generates resource descriptor and resource tag 
  pathnames. The original code used a bunch of str* C library functions 
  that caused warnings on some compilers.
  
  iASL: Removed some uses of strncpy and replaced with memmove. The strncpy 
  function can overwrite buffers if the calling code is not very careful. 
  In the case of generating a module/table header, use of memmove is a 
  better implementation.
  
  
  3) Status of new features that have not been completed at this time:
  
  iASL: Implementing an enhanced multiple file compilation into a single 
  namespace feature (Status): This feature will be released soon, and 
  allows multiple ASL files to be compiled into the same single namespace. 
  By doing so, any unresolved external declarations as well as duplicate 
  named object declarations can be detected during compilation (rather than 
  later during runtime). The following commands are examples that utilize 
  this feature:
      iasl dsdt.asl ssdt.asl
      iasl dsdt.asl ssdt1.asl ssdt2.asl
      iasl dsdt.asl ssdt*.asl
  
  ASL tutorial status: Feedback is being gathered internally and the 
  current plan is to publish this tutorial on the ACPICA website after a 
  final review by a tech writer.
  
  ----------------------------------------
  15 February 2019. Summary of changes for version 20190215:
  
  
  0) Support for ACPI specification version 6.3:
  
  Add PCC operation region support for the AML interpreter. This adds PCC 
  operation region support in the AML interpreter and a default handler for 
  acpiexec. The change also renames the PCC region address space keyword to 
  PlatformCommChannel.
  
  Support for new predefined methods _NBS, _NCH, _NIC, _NIH, and _NIG. 
  These methods provide OSPM with health information and device boot 
  status.
  
  PDTT: Add TriggerOrder to the PCC Identifier structure. The field value 
  defines if the trigger needs to be invoked by OSPM before or at the end 
  of kernel crash dump processing/handling operation.
  
  SRAT: Add Generic Affinity Structure subtable. This subtable in the SRAT 
  is used for describing devices such as heterogeneous processors, 
  accelerators, GPUs, and IO devices with integrated compute or DMA 
  engines.
  
  MADT: Add support for statistical profiling in GICC. Statistical 
  profiling extension (SPE) is an architecture-specific feature for ARM.
  
  MADT: Add online capable flag. If this bit is set, system hardware 
  supports enabling this processor during OS runtime.
  
  New Error Disconnect Recover Notification value. There are a number of 
  scenarios where system Firmware in collaboration with hardware may 
  disconnect one or more devices from the rest of the system for purposes 
  of error containment. Firmware can use this new notification value to 
  alert OSPM of such a removal.
  
  PPTT: New additional fields in Processor Structure Flags. These flags 
  provide more information about processor topology.
  
  NFIT/Disassembler: Change a field name from "Address Range" to "Region 
  Type".
  
  HMAT updates: make several existing fields to be reserved as well as 
  rename subtable 0 to "memory proximity domain attributes".
  
  GTDT: Add support for new GTDT Revision 3. This revision adds information 
  for the EL2 timer.
  
  iASL: Update the HMAT example template for new fields.
  
  iASL: Add support for the new revision of the GTDT (Rev 3).
  
  
  1) ACPICA kernel-resident subsystem:
  
  AML Parser: fix the main AML parse loop to correctly skip erroneous 
  extended opcodes. AML opcodes come in two lengths: 1-byte opcodes and 2-
  byte extended opcodes. If an error occurs during an AML table load, the 
  AML parser will continue loading the table by skipping the offending 
  opcode. This implements a "load table at any cost" philosophy.
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Add checks for illegal object references, such as a reference 
  outside of method to an object within a method. Such an object is only 
  temporary.
  
  iASL: Emit error for creation of a zero-length operation region. Such a 
  region is rather pointless. If encountered, a runtime error is also 
  implemented in the interpreter.
  
  Debugger: Fix a possible fault with the "test objects" command.
  
  iASL: Makefile: support parent directory filenames containing embedded 
  spaces.
  
  iASL: Update the TPM2 template to revision 4.
  
  iASL: Add the ability to report specific warnings or remarks as errors.
  
  Disassembler: Disassemble OEMx tables as actual AML byte code. 
  Previously, these tables were treated as "unknown table".
  
  iASL: Add definition and disassembly for TPM2 revision 3.
  
  iASL: Add support for TPM2 rev 3 compilation.
  
  
  ----------------------------------------
  08 January 2019. Summary of changes for version 20190108:
  
  
  1) ACPICA kernel-resident subsystem:
  
  Updated all copyrights to 2019. This affects all source code modules.
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  ASL test suite (ASLTS): Updated all copyrights to 2019.
  
  Tools: Updated all signon copyrights to 2019.
  
  AcpiExec: Added a new option to dump extra information concerning any 
  memory leaks detected by the internal object/cache tracking mechanism. -
  va
  
  iASL: Updated the table template for the TPM2 table to the newest version 
  of the table (Revision 4)
  
  
  ----------------------------------------
  13 December 2018. Summary of changes for version 20181213:
  
  
  1) ACPICA Kernel-resident Subsystem:
  
  Fixed some buffer length issues with the GenericSerialBus, related to two 
  of the bidirectional protocols: AttribRawProcessBytes and AttribRawBytes, 
  which are rarely seen in the field. For these, the LEN field of the ASL 
  buffer is now ignored. Hans de Goede
  
  Implemented a new object evaluation trace mechanism for control methods 
  and data objects. This includes nested control methods. It is 
  particularly useful for examining the ACPI execution during system 
  initialization since the output is relatively terse. The flag below 
  enables the output of the trace via the ACPI_DEBUG_PRINT_RAW interface:
     #define ACPI_LV_EVALUATION          0x00080000
  
  Examples:
     Enter evaluation       :  _SB.PCI0._INI (Method)
     Exit evaluation        :  _SB.PCI0._INI
     Enter evaluation       :  _OSI (Method)
     Exit evaluation        :  _OSI
     Enter evaluation       :  _SB.PCI0.TEST (Method)
     Nested method call     :     _SB.PCI0.NST1
     Exit nested method     :     _SB.PCI0.NST1
     Exit evaluation        :  _SB.PCI0.TEST
  
  Added two recently-defined _OSI strings. See 
  https://docs.microsoft.com/en-us/windows-hardware/drivers/acpi/winacpi-
  osi.
     "Windows 2018"
     "Windows 2018.2"
  
  Update for buffer-to-string conversions via the ToHexString ASL operator. 
  A "0x" is now prepended to each of the hex values in the output string. 
  This provides compatibility with other ACPI implementations. The ACPI 
  specification is somewhat vague on this issue.
     Example output string after conversion: 
  "0x01,0x02,0x03,0x04,0x05,0x06"
  
  Return a run-time error for TermArg expressions within individual package 
  elements. Although this is technically supported by the ASL grammar, 
  other ACPI implementations do not support this either. Also, this fixes a 
  fault if this type of construct is ever encountered (it never has been).
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Implemented a new compile option (-ww) that will promote individual 
  warnings and remarks to errors. This is intended to enhance the firmware 
  build process.
  
  AcpiExec: Implemented a new command-line option (-eo) to support the new 
  object evaluation trace mechanism described above.
  
  Disassembler: Added support to disassemble OEMx tables as AML/ASL tables 
  instead of a "unknown table" message.
  
  AcpiHelp: Improved support for the "special" predefined names such as 
  _Lxx, _Exx, _EJx, _T_x, etc. For these, any legal hex value can now be 
  used for "xx" and "x".
  
  ----------------------------------------
  31 October 2018. Summary of changes for version 20181031:
  
  
  An Operation Region regression was fixed by properly adding address 
  ranges to a global list during initialization. This allows OS to 
  accurately check for overlapping regions between native devices (such as 
  PCI) and Operation regions as well as checking for region conflicts 
  between two Operation Regions.
  
  Added support for the 2-byte extended opcodes in the code/feature that 
  attempts to continue parsing during the table load phase. Skip parsing 
  Device declarations (and other extended opcodes) when an error occurs 
  during parsing. Previously, only single-byte opcodes were supported.
  
  Cleanup: Simplified the module-level code support by eliminating a 
  useless global variable (AcpiGbl_GroupModuleLeveCode).
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL/Preprocessor: Fixed a regression where an incorrect use of ACPI_FREE 
  could cause a fault in the preprocessor. This was an inadvertent side-
  effect from moving more allocations/frees to the local cache/memory 
  mechanism.
  
  iASL: Enhanced error detection by validating that all NameSeg elements 
  within a NamePatch actually exist. The previous behavior was spotty at 
  best, and such errors could be improperly ignored at compiler time (never 
  at runtime, however. There are two new error messages, as shown in the 
  examples below:
  
  dsdt.asl     33:     CreateByteField (TTTT.BXXX, 1, CBF1)
  Error    6161 -                              ^ One or more objects within 
  the Pathname do not exist (TTTT.BXXX)
  
  dsdt.asl     34:     CreateByteField (BUF1, UUUU.INT1, BBBB.CBF1)
  Error    6160 -        One or more prefix Scopes do not exist ^  
  (BBBB.CBF1)
  
  iASL: Disassembler/table-compiler: Added support for the static data 
  table TPM2 revision 3 (an older version of TPM2). The support has been 
  added for the compiler and the disassembler.
  
  Fixed compilation of DOS format data table file on Unix/Linux systems. 
  iASL now properly detects line continuations (\) for DOS format data 
  table definition language files on when executing on Unix/Linux.
  
  ----------------------------------------
  03 October 2018. Summary of changes for version 20181003:
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  Fixed a regression introduced in version 20180927 that could cause the 
  compiler to fault, especially with NamePaths containing one or more 
  carats (^). Such as: ^^_SB_PCI0
  
  Added a new remark for the Sleep() operator when the sleep time operand 
  is larger than one second. This is a very long time for the ASL/BIOS code 
  and may not be what was intended by the ASL writer.
  
  ----------------------------------------
  27 September 2018. Summary of changes for version 20180927:
  
  
  1) ACPICA kernel-resident subsystem:
  
  Updated the GPE support to clear the status of all ACPI events when 
  entering any/all sleep states in order to avoid premature wakeups. In 
  theory, this may cause some wakeup events to be missed, but the 
  likelihood of this is small. This change restores the original behavior 
  of the ACPICA code in order to fix a regression seen from the previous 
  "Stop unconditionally clearing ACPI IRQs during suspend/resume" change. 
  This regression could cause some systems to incorrectly wake immediately.
  
  Updated the execution of the _REG methods during initialization and 
  namespace loading to bring the behavior into closer conformance to the 
  ACPI specification and other ACPI implementations:
  
  From the ACPI specification 6.2A, section 6.5.4 "_REG (Region):
      "Control methods must assume all operation regions are inaccessible 
  until the _REG(RegionSpace, 1) method is executed"
  
      "The exceptions to this rule are:
  1.  OSPM must guarantee that the following operation regions are always 
  accessible:
      SystemIO operation regions.
      SystemMemory operation regions when accessing memory returned by the 
  System Address Map reporting interfaces."
  
  Since the state of both the SystemIO and SystemMemory address spaces are 
  defined by the specification to never change, this ACPICA change ensures 
  that now _REG is never called on them. This solves some problems seen in 
  the field and provides compatibility with other ACPI implementations. An 
  update to the upcoming new version of the ACPI specification will help 
  clarify this behavior.
  
  Updated the implementation of support for the Generic Serial Bus. For the 
  "bidirectional" protocols, the internal implementation now automatically 
  creates a return data buffer of the maximum size (255). This handles the 
  worst-case for data that is returned from the serial bus handler, and 
  fixes some problems seen in the field. This new buffer is directly 
  returned to the ASL. As such, there is no true "bidirectional" buffer, 
  which matches the ACPI specification. This is the reason for the "double 
  store" seen in the example ASL code in the specification, shown below:
  
  Word Process Call (AttribProcessCall):
      OperationRegion(TOP1, GenericSerialBus, 0x00, 0x100)
      Field(TOP1, BufferAcc, NoLock, Preserve)
      {
          FLD1, 8, // Virtual register at command value 1.
      }
  
      Name(BUFF, Buffer(20){}) // Create GenericSerialBus data buffer
                               // as BUFF
      CreateWordField(BUFF, 0x02, DATA) // DATA = Data (Word)
  
      Store(0x5416, DATA)               // Save 0x5416 into the data buffer
      Store(Store(BUFF, FLD1), BUFF)    // Invoke a write/read Process Call 
  transaction
                             // This is the "double store". The write to
                             // FLD1 returns a new buffer, which is stored
                             // back into BUFF with the second Store.
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Implemented detection of extraneous/redundant uses of the Offset() 
  operator within a Field Unit list. A remark is now issued for these. For 
  example, the first two of the Offset() operators below are extraneous. 
  Because both the compiler and the interpreter track the offsets 
  automatically, these Offsets simply refer to the current offset and are 
  unnecessary. Note, when optimization is enabled, the iASL compiler will 
  in fact remove the redundant Offset operators and will not emit any AML 
  code for them.
  
      OperationRegion (OPR1, SystemMemory, 0x100, 0x100)
      Field (OPR1)
      {
          Offset (0),     // Never needed
          FLD1, 32,
          Offset (4),     // Redundant, offset is already 4 (bytes)
          FLD2, 8,
          Offset (64),    // OK use of Offset.
          FLD3, 16,
      }
  dsdt.asl     14:         Offset (0),
  Remark   2158 -                 ^ Unnecessary/redundant use of Offset 
  operator
  
  dsdt.asl     16:         Offset (4),
  Remark   2158 -                 ^ Unnecessary/redundant use of Offset 
  operator
  
  ----------------------------------------
  10 August 2018. Summary of changes for version 20180810:
  
  
  1) ACPICA kernel-resident subsystem:
  
  Initial ACPI table loading: Attempt to continue loading ACPI tables 
  regardless of malformed AML. Since migrating table initialization to the 
  new module-level code support, the AML interpreter rejected tables upon 
  any ACPI error encountered during table load. This is a problem because 
  non-serious ACPI errors during table load do not necessarily mean that 
  the entire definition block (DSDT or SSDT) is invalid. This change 
  improves the table loading by ignoring some types of errors that can be 
  generated by incorrect AML. This can range from object type errors, scope 
  errors, and index errors.
  
  Suspend/Resume support: Update to stop unconditionally clearing ACPI IRQs 
  during suspend/resume. The status of ACPI events is no longer cleared 
  when entering the ACPI S5 system state (power off) which caused some 
  systems to power up immediately after turning off power in certain 
  situations. This was a functional regression. It was fixed by clearing 
  the status of all ACPI events again when entering S5 (for system-wide 
  suspend or hibernation the clearing of the status of all events is not 
  desirable, as it might cause the kernel to miss wakeup events sometimes). 
  Rafael Wysocki.
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  AcpiExec: Enhanced the -fi option (Namespace initialization file). Field 
  elements listed in the initialization file were previously initialized 
  after the table load and before executing module-level code blocks. 
  Recent changes in the module-level code support means that the table load 
  becomes a large control method execution. If fields are used within 
  module-level code and we are executing with the -fi option, the 
  initialization values were used to initialize the namespace object(s) 
  only after the table was finished loading. This change Provides an early 
  initialization of objects specified in the initialization file so that 
  field unit values are populated during the table load (not after the 
  load).
  
  AcpiExec: Fixed a small memory leak regression that could result in 
  warnings during exit of the utility. These warnings were similar to 
  these:
      0002D690 Length 0x0006 nsnames-0502 [Not a Descriptor - too small]
      0002CD70 Length 0x002C utcache-0453 [Operand] Integer RefCount 0x0001
  
  ----------------------------------------
  29 June 2018. Summary of changes for version 20180629:
  
  
  1) iASL Compiler/Disassembler and Tools:
  
  iASL: Fixed a regression related to the use of the ASL External 
  statement. Error checking for the use of the External() statement has 
  been relaxed. Previously, a restriction on the use of External meant that 
  the referenced named object was required to be defined in a different 
  table (an SSDT). Thus it would be an error to declare an object as an 
  external and then define the same named object in the same table. For 
  example:
      DefinitionBlock (...)
      {
          External (DEV1)
          Device (DEV1){...} // This was an error
      }
  However, this behavior has caused regressions in some existing ASL code, 
  because there is code that depends on named objects and externals (with 
  the same name) being declared in the same table. This change will allow 
  the ASL code above to compile without errors or warnings.
  
  iASL: Implemented ASL language extensions for four operators to make some 
  of their arguments optional instead of required:
      1) Field (RegionName, AccessType, LockRule, UpdateRule)
      2) BankField (RegionName, BankName, BankValue,
                  AccessType, LockRule, UpdateRule)
      3) IndexField (IndexName, DataName,
                  AccessType, LockRule, UpdateRule)
  For the Field operators above, the AccessType, LockRule, and UpdateRule 
  are now optional arguments. The default values are:
          AccessType: AnyAcc
          LockRule:   NoLock
          UpdateRule: Preserve
      4) Mutex (MutexName, SyncLevel)
  For this operator, the SyncLevel argument is now optional. This argument 
  is rarely used in any meaningful way by ASL code, and thus it makes sense 
  to make it optional. The default value is:
          SyncLevel:  0
  
  iASL: Attempted use of the ASL Unload() operator now results in the 
  following warning:
      "Unload is not supported by all operating systems"
  This is in fact very true, and the Unload operator may be completely 
  deprecated in the near future.
  
  AcpiExec: Fixed a regression for the -fi option (Namespace initialization 
  file. Recent changes in the ACPICA module-level code support altered the 
  table load/initialization sequence . This means that the table load has 
  become a large method execution of the table itself. If Operation Region 
  Fields are used within any module-level code and the -fi option was 
  specified, the initialization values were populated only after the table 
  had completely finished loading (and thus the module-level code had 
  already been executed). This change moves the initialization of objects 
  listed in the initialization file to before the table is executed as a 
  method. Field unit values are now initialized before the table execution 
  is performed.
  
  ----------------------------------------
  31 May 2018. Summary of changes for version 20180531:
  
  
  1) ACPICA kernel-resident Subsystem:
  
  Implemented additional support to help ensure that a DSDT or SSDT is 
  fully loaded even if errors are incurred during the load. The majority of 
  the problems that are seen is the failure of individual AML operators 
  that occur during execution of any module-level code (MLC) existing in 
  the table. This support adds a mechanism to abort the current ASL 
  statement (AML opcode), emit an error message, and to simply move on to 
  the next opcode -- instead of aborting the entire table load. This is 
  different than the execution of a control method where the entire method 
  is aborted upon any error. The goal is to perform a very "best effort" to 
  load the ACPI tables. The most common MLC errors that have been seen in 
  the field are direct references to unresolved ASL/AML symbols (referenced 
  directly without the use of the CondRefOf operator to validate the 
  symbol). This new ACPICA behavior is now compatible with other ACPI 
  implementations.
  
  Interpreter: The Unload AML operator is no longer supported for the 
  reasons below. An AE_NOT_IMPLEMENTED exception is returned.
  1) A correct implementation on at least some hosts may not be possible.
  2) Other ACPI implementations do not correctly/fully support it.
  3) It requires host device driver support which is not known to exist.
      (To properly support namespace unload out from underneath.)
  4) This AML operator has never been seen in the field.
  
  Parser: Added a debug option to dump AML parse sub-trees as they are 
  being executed. Used with ACPI_DEBUG_PRINT, the enabling debug level is 
  ACPI_DB_PARSE_TREES.
  
  Debugger: Reduced the verbosity for errors incurred during table load and 
  module-level code execution.
  
  Completed an investigation into adding a namespace node "owner list" 
  instead of the current "owner ID" associated with namespace nodes. This 
  list would link together all nodes that are owned by an individual 
  control method. The purpose would be to enhance control method execution 
  by speeding up cleanup during method exit (all namespace nodes created by 
  a method are deleted upon method termination.) Currently, the entire 
  namespace must be searched for matching owner IDs if (and only if) the 
  method creates named objects outside of the local scope. However, by far 
  the most common case is that methods create objects locally, not outside 
  the method scope. There is already an ACPICA optimization in place that 
  only searches the entire namespace in the rare case of a method creating 
  objects elsewhere in the namespace. Therefore, it is felt that the 
  overhead of adding an additional pointer to each namespace node to 
  implement the owner list makes this feature unnecessary.
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL, Disassembler, and Template generator: Implemented support for 
  Revision D of the IORT table. Adds a new subtable that is used to specify 
  SMMUv3 PMCGs. rmurphy-arm.
  
  Disassembler: Restored correct table header validation for the "special" 
  ACPI tables -- RSDP and FACS. These tables do not contain a standard ACPI 
  table header and must be special-cased. This was a regression that has 
  been present for apparently a long time.
  
  AcpiExec: Reduced verbosity of the local exception handler implemented 
  within acpiexec. This handler is invoked by ACPICA upon any exceptions 
  generated during control method execution. A new option was added: -vh 
  restores the original verbosity level if desired.
  
  AcpiExec: Changed the default base from decimal to hex for the -x option 
  (set debug level). This simplifies the use of this option and matches the 
  behavior of the corresponding iASL -x option.
  
  AcpiExec: Restored a force-exit on multiple control-c (sigint) 
  interrupts. This allows program termination even if other issues cause 
  the control-c to fail.
  
  ASL test suite (ASLTS): Added tests for the recently implemented package 
  element resolution mechanism that allows forward references to named 
  objects from individual package elements (this mechanism provides 
  compatibility with other ACPI implementations.)
  
  
  ----------------------------------------
  8 May 2018. Summary of changes for version 20180508:
  
  
  1) ACPICA kernel-resident subsystem:
  
  Completed the new (recently deployed) package resolution mechanism for 
  the Load and LoadTable ASL/AML operators. This fixes a regression that 
  was introduced in version 20180209 that could result in an 
  AE_AML_INTERNAL exception during the loading of a dynamic ACPI/AML table 
  (SSDT) that contains package objects.
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  AcpiDump and AcpiXtract: Implemented support for ACPI tables larger than 
  1 MB. This change allows for table offsets within the acpidump file to be 
  up to 8 characters. These changes are backwards compatible with existing 
  acpidump files.
  
  
  ----------------------------------------
  27 April 2018. Summary of changes for version 20180427: 
  
  
  1) ACPICA kernel-resident subsystem:
  
  Debugger: Added support for Package objects in the "Test Objects" 
  command. This command walks the entire namespace and evaluates all named 
  data objects (Integers, Strings, Buffers, and now Packages).
  
  Improved error messages for the namespace root node. Originally, the root 
  was referred to by the confusing string "\___". This has been replaced by 
  "Namespace Root" for clarification.
  
  Fixed a potential infinite loop in the AcpiRsDumpByteList function. Colin 
  Ian King <colin.king@canonical.com>.
  
  
  2) iASL Compiler/Disassembler and Tools: 
  
  iASL: Implemented support to detect and flag illegal forward references. 
  For compatibility with other ACPI implementations, these references are 
  now illegal at the root level of the DSDT or SSDTs. Forward references 
  have always been illegal within control methods. This change should not 
  affect existing ASL/AML code because of the fact that these references 
  have always been illegal in the other ACPI implementation.
  
  iASL: Added error messages for the case where a table OEM ID and OEM 
  TABLE ID strings are longer than the ACPI-defined length. Previously, 
  these strings were simply silently truncated.
  
  iASL: Enhanced the -tc option (which creates an AML hex file in C, 
  suitable for import into a firmware project):
    1) Create a unique name for the table, to simplify use of multiple 
  SSDTs.
    2) Add a protection #ifdef in the file, similar to a .h header file.
  With assistance from Sami Mujawar, sami.mujawar@arm.com and Evan Lloyd, 
  evan.lloyd@arm.com
  
  AcpiExec: Added a new option, -df, to disable the local fault handler. 
  This is useful during debugging, where it may be desired to drop into a 
  debugger on a fault.
  
  ----------------------------------------
  13 March 2018. Summary of changes for version 20180313:
  
  
  1) ACPICA kernel-resident subsystem:
  
  Implemented various improvements to the GPE support:
  
  1) Dispatch all active GPEs at initialization time so that no GPEs are 
  lost.
  2) Enable runtime GPEs earlier. Some systems expect GPEs to be enabled 
  before devices are enumerated.
  3) Don't unconditionally clear ACPI IRQs during suspend/resume, so that 
  IRQs are not lost.
  4) Add parallel GPE handling to eliminate the possibility of dispatching 
  the same GPE twice.
  5) Dispatch any pending GPEs after enabling for the first time.
  
  AcpiGetObjectInfo - removed support for the _STA method. This was causing 
  problems on some platforms.
  
  Added a new _OSI string, "Windows 2017.2".
  
  Cleaned up and simplified the module-level code support. These changes 
  are in preparation for the eventual removal of the legacy MLC support 
  (deferred execution), replaced by the new MLC architecture which executes 
  the MLC as a table is loaded (DSDT/SSDTs).
  
  Changed a compile-time option to a runtime option. Changes the option to 
  ignore ACPI table load-time package resolution errors into a runtime 
  option. Used only for platforms that generate many AE_NOT_FOUND errors 
  during boot. AcpiGbl_IgnorePackageResolutionErrors.
  
  Fixed the ACPI_ERROR_NAMESPACE macro. This change involves putting some 
  ACPI_ERROR_NAMESPACE parameters inside macros. By doing so, we avoid 
  compilation errors from unused variables (seen with some compilers).
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  ASLTS: parallelized execution in order to achieve an (approximately) 2X 
  performance increase.
  
  ASLTS: Updated to use the iASL __LINE__ and __METHOD__ macros. Improves 
  error reporting.
  
  ----------------------------------------
  09 February 2018. Summary of changes for version 20180209:
  
  
  1) ACPICA kernel-resident subsystem:
  
  Completed the final integration of the recent changes to Package Object 
  handling and the module-level AML code support. This allows forward 
  references from individual package elements when the package object is 
  declared from within module-level code blocks. Provides compatibility 
  with other ACPI implementations.
  
  The new architecture for the AML module-level code has been completed and 
  is now the default for the ACPICA code. This new architecture executes 
  the module-level code in-line as the ACPI table is loaded/parsed instead 
  of the previous architecture which deferred this code until after the 
  table was fully loaded. This solves some ASL code ordering issues and 
  provides compatibility with other ACPI implementations. At this time, 
  there is an option to fallback to the earlier architecture, but this 
  support is deprecated and is planned to be completely removed later this 
  year.
  
  Added a compile-time option to ignore AE_NOT_FOUND exceptions during 
  resolution of named reference elements within Package objects. Although 
  this is potentially a serious problem, it can generate a lot of 
  noise/errors on platforms whose firmware carries around a bunch of unused 
  Package objects. To disable these errors, define 
  ACPI_IGNORE_PACKAGE_RESOLUTION_ERRORS in the OS-specific header. All 
  errors are always reported for ACPICA applications such as AcpiExec.
  
  Fixed a regression related to the explicit type-conversion AML operators 
  (ToXXXX). The regression was introduced early in 2017 but was not seen 
  until recently because these operators are not fully supported by other 
  ACPI implementations and are thus rarely used by firmware developers. The 
  operators are defined by the ACPI specification to not implement the 
  "implicit result object conversion". The regression incorrectly 
  introduced this object conversion for the following explicit conversion 
  operators:
      ToInteger
      ToString
      ToBuffer
      ToDecimalString
      ToHexString
      ToBCD
      FromBCD
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Fixed a problem with the compiler constant folding feature as 
  related to the ToXXXX explicit conversion operators. These operators do 
  not support the "implicit result object conversion" by definition. Thus, 
  ASL expressions that use these operators cannot be folded to a simple 
  Store operator because Store implements the implicit conversion. This 
  change uses the CopyObject operator for the ToXXXX operator folding 
  instead. CopyObject is defined to not implement implicit result 
  conversions and is thus appropriate for folding the ToXXXX operators.
  
  iASL: Changed the severity of an error condition to a simple warning for 
  the case where a symbol is declared both locally and as an external 
  symbol. This accommodates existing ASL code.
  
  AcpiExec: The -ep option to enable the new architecture for module-level 
  code has been removed. It is replaced by the -dp option which instead has 
  the opposite effect: it disables the new architecture (the default) and 
  enables the legacy architecture. When the legacy code is removed in the 
  future, the -dp option will be removed also.
  
  ----------------------------------------
  05 January 2018. Summary of changes for version 20180105:
  
  
  1) ACPICA kernel-resident subsystem:
  
  Updated all copyrights to 2018. This affects all source code modules.
  
  Fixed a possible build error caused by an unresolved reference to the 
  AcpiUtSafeStrncpy function.
  
  Removed NULL pointer arithmetic in the various pointer manipulation 
  macros. All "(void *) NULL" constructs are converted to "(void *) 0". 
  This eliminates warnings/errors in newer C compilers. Jung-uk Kim.
  
  Added support for A32 ABI compilation, which uses the ILP32 model. Anuj 
  Mittal.
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  ASLTS: Updated all copyrights to 2018.
  
  Tools: Updated all signon copyrights to 2018.
  
  AcpiXtract: Fixed a regression related to ACPI table signatures where the 
  signature was truncated to 3 characters (instead of 4).
  
  AcpiExec: Restore the original terminal mode after the use of the -v and 
  -vd options.
  
  ASLTS: Deployed the iASL __METHOD__ macro across the test suite.
  
  ----------------------------------------
  14 December 2017. Summary of changes for version 20171214:
  
  
  1) ACPICA kernel-resident subsystem:
  
  Fixed a regression in the external (public) AcpiEvaluateObjectTyped 
  interface where the optional "pathname" argument had inadvertently become 
  a required argument returning an error if omitted (NULL pointer 
  argument).
  
  Fixed two possible memory leaks related to the recently developed "late 
  resolution" of reference objects within ASL Package Object definitions.
  
  Added two recently defined _OSI strings: "Windows 2016" and "Windows 
  2017". Mario Limonciello.
  
  Implemented and deployed a safer version of the C library function 
  strncpy:  AcpiUtSafeStrncpy. The intent is to at least prevent the 
  creation of unterminated strings as a possible result of a standard 
  strncpy.
  
  Cleaned up and restructured the global variable file (acglobal.h). There 
  are many changes, but no functional changes.
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL Table Compiler: Fixed a problem with the DBG2 ACPI table where the 
  optional OemData field at the end of the table was incorrectly required 
  for proper compilation. It is now correctly an optional field.
  
  ASLTS: The entire suite was converted from standard ASL to the ASL+ 
  language, using the ASL-to-ASL+ converter which is integrated into the 
  iASL compiler. A binary compare of all output files has verified the 
  correctness of the conversion.
  
  iASL: Fixed the source code build for platforms where "char" is unsigned. 
  This affected the iASL lexer only. Jung-uk Kim.
  
  ----------------------------------------
  10 November 2017. Summary of changes for version 20171110:
  
  
  1) ACPICA kernel-resident subsystem:
  
  This release implements full support for ACPI 6.2A:
      NFIT - Added a new subtable, "Platform Capabilities Structure"
  No other changes to ACPICA were required, since ACPI 6.2A is primarily an 
  errata release of the specification.
  
  Other ACPI table changes:
      IORT: Added the SMMUv3 Device ID mapping index. Hanjun Guo
      PPTT: Added cache attribute flag definitions to actbl1.h. Jeremy 
  Linton
  
  Utilities: Modified the string/integer conversion functions to use 
  internal 64-bit divide support instead of a native divide. On 32-bit 
  platforms, a 64-bit divide typically requires a library function which 
  may not be present in the build (kernel or otherwise).
  
  Implemented a targeted error message for timeouts returned from the 
  Embedded Controller device driver. This is seen frequently enough to 
  special-case an AE_TIME returned from an EC operation region access:
      "Timeout from EC hardware or EC device driver"
  
  Changed the "ACPI Exception" message prefix to "ACPI Error" so that all 
  runtime error messages have the identical prefix.
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  AcpiXtract: Fixed a problem with table header detection within the 
  acpidump file. Processing a table could be ended early if a 0x40 (@) 
  appears in the original binary table, resulting in the @ symbol appearing 
  in the decoded ASCII field at the end of the acpidump text line. The 
  symbol caused acpixtract to incorrectly think it had reached the end of 
  the current table and the beginning of a new table.
  
  AcpiXtract: Added an option (-f) to ignore some errors during table 
  extraction. This initial implementation ignores non-ASCII and non-
  printable characters found in the acpidump text file.
  
  TestSuite(ASLTS)/AcpiExec: Fixed and restored the memory usage statistics 
  for ASLTS. This feature is used to track memory allocations from 
  different memory caches within the ACPICA code. At the end of an ASLTS 
  run, these memory statistics are recorded and stored in a log file.
  
  Debugger (user-space version): Implemented a simple "Background" command. 
  Creates a new thread to execute a control method in the background, while 
  control returns to the debugger prompt to allow additional commands.
      Syntax: Background <Namepath> [Arguments]
  
  ----------------------------------------
  29 September 2017. Summary of changes for version 20170929:
  
  
  1) ACPICA kernel-resident subsystem:
  
  Redesigned and implemented an improved ASL While() loop timeout 
  mechanism. This mechanism is used to prevent infinite loops in the kernel 
  AML interpreter caused by either non-responsive hardware or incorrect AML 
  code. The new implementation uses AcpiOsGetTimer instead of a simple 
  maximum loop count, and is thus more accurate and constant across 
  different machines. The default timeout is currently 30 seconds, but this 
  may be adjusted later.
  
  Renamed the ACPI_AML_INFINITE_LOOP exception to AE_AML_LOOP_TIMEOUT to 
  better reflect the new implementation of the loop timeout mechanism.
  
  Updated the AcpiGetTimerDuration interface to cleanup the 64-bit support 
  and to fix an off-by-one error. Jung-uk Kim.
  
  Fixed an EFI build problem by updating the makefiles to for a new file 
  that was added, utstrsuppt.c
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  Implemented full support for the PDTT, SDEV, and TPM2 ACPI tables. This 
  includes support in the table disassembler, compiler, and template 
  generator.
  
  iASL: Added an exception for an illegal type of recursive method 
  invocation. If a method creates named objects, the first recursive call 
  will fail at runtime. This change adds an error detection at compile time 
  to catch the problem up front. Note: Marking such a method as 
  "serialized" will not help with this problem, because the same thread can 
  acquire the method mutex more than once. Example compiler and runtime 
  output:
  
      Method (MTH1)
      {
          Name (INT1, 1)
          MTH1 ()
      }
  
      dsdt.asl     22: MTH1 ()
      Error    6152 -  ^ Illegal recursive call to method
                         that creates named objects (MTH1)
  
  Previous runtime exception:
      ACPI Error: [INT1] Namespace lookup failure,
      AE_ALREADY_EXISTS (20170831/dswload2-465)
  
  iASL: Updated support for External() opcodes to improve namespace 
  management and error detection. These changes are related to issues seen 
  with multiple-segment namespace pathnames within External declarations, 
  such as below:
  
      External(\_SB.PCI0.GFX0, DeviceObj)
      External(\_SB.PCI0.GFX0.ALSI)
  
  iASL: Implemented support for multi-line error/warning messages. This 
  enables more detailed and helpful error messages as below, from the 
  initial deployment for the duplicate names error:
  
      DSDT.iiii   1692:       Device(PEG2) {
      Error    6074 -                  ^ Name already exists in scope 
  (PEG2)
  
          Original name creation/declaration below:
          DSDT.iiii     93:   External(\_SB.PCI0.PEG2, DeviceObj)
  
  AcpiXtract: Added additional flexibility to support differing input hex 
  dump formats. Specifically, hex dumps that contain partial disassembly 
  and/or comments within the ACPI table data definition. There exist some 
  dump utilities seen in the field that create this type of hex dump (such 
  as Simics). For example:
  
      DSDT @ 0xdfffd0c0 (10999 bytes)
          Signature DSDT
          Length 10999
          Revision 1
          Checksum 0xf3 (Ok)
          OEM_ID BXPC
          OEM_table_id BXDSDT
          OEM_revision 1
          Creator_id 1280593481
          Creator_revision 537399345
        0000: 44 53 44 54 f7 2a 00 00 01 f3 42 58 50 43 00 00
        ...
        2af0: 5f 4c 30 46 00 a4 01
  
  Test suite: Miscellaneous changes/fixes:
      More cleanup and simplification of makefiles
      Continue compilation of test cases after a compile failure
      Do not perform binary compare unless both files actually exist
  
  iASL: Performed some code/module restructuring. Moved all memory 
  allocation functions to new modules. Two new files, aslallocate.c and 
  aslcache.c
  
  ----------------------------------------
  31 August 2017. Summary of changes for version 20170831:
  
  
  1) ACPICA kernel-resident subsystem:
  
  Implemented internal support for full 64-bit addresses that appear in all 
  Generic Address Structure (GAS) structures. Previously, only the lower 32 
  bits were used. Affects the use of GAS structures in the FADT and other 
  tables, as well as the GAS structures passed to the AcpiRead and 
  AcpiWrite public external interfaces that are used by drivers. Lv Zheng.
  
  Added header support for the PDTT ACPI table (Processor Debug Trigger 
  Table). Full support in the iASL Data Table Compiler and disassembler is 
  forthcoming.
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL/Disassembler: Fixed a problem with the PPTT ACPI table (Processor 
  Properties Topology Table) where a flag bit was specified in the wrong 
  bit position ("Line Size Valid", bit 6).
  
  iASL: Implemented support for Octal integer constants as defined by the 
  ASL language grammar, per the ACPI specification. Any integer constant 
  that starts with a zero is an octal constant. For example,
      Store (037777, Local0) /* Octal constant */
      Store (0x3FFF, Local0) /* Hex equivalent */
      Store (16383,  Local0) /* Decimal equivalent */
  
  iASL: Improved overflow detection for 64-bit string conversions during 
  compilation of integer constants. "Overflow" in this case means a string 
  that represents an integer that is too large to fit into a 64-bit value. 
  Any 64-bit constants within a 32-bit DSDT or SSDT are still truncated to 
  the low-order 32 bits with a warning, as previously implemented. Several 
  new exceptions are defined that indicate a 64-bit overflow, as well as 
  the base (radix) that was used during the attempted conversion. Examples:
      Local0 = 0xAAAABBBBCCCCDDDDEEEEFFFF        // AE_HEX_OVERFLOW
      Local0 = 01111222233334444555566667777     // AE_OCTAL_OVERFLOW
      Local0 = 11112222333344445555666677778888  // AE_DECIMAL_OVERFLOW
  
  iASL: Added a warning for the case where a ResourceTemplate is declared 
  with no ResourceDescriptor entries (coded as "ResourceTemplate(){}"). In 
  this case, the resulting template is created with a single END_TAG 
  descriptor, which is essentially useless.
  
  iASL: Expanded the -vw option (ignore specific warnings/remarks) to 
  include compilation error codes as well.
  
  ----------------------------------------
  28 July 2017. Summary of changes for version 20170728:
  
  
  1) ACPICA kernel-resident subsystem:
  
  Fixed a regression seen with small resource descriptors that could cause 
  an inadvertent AE_AML_NO_RESOURCE_END_TAG exception.
  
  AML interpreter: Implemented a new feature that allows forward references 
  from individual named references within package objects that are 
  contained within blocks of "module-level code". This provides 
  compatibility with other ACPI implementations and supports existing 
  firmware that depends on this feature. Example:
  
      Name (ABCD, 1)
      If (ABCD)                       /* An If() at module-level */
      {
          Name (PKG1, Package()
          {
              INT1                    /* Forward reference to object INT1 
  */
          })
          Name (INT1, 0x1234)
      }
  
  AML Interpreter: Fixed a problem with the Alias() operator where aliases 
  to some ASL objects were not handled properly. Objects affected are: 
  Mutex, Event, and OperationRegion.
  
  AML Debugger: Enhanced to properly handle AML Alias objects. These 
  objects have one level of indirection which was not fully supported by 
  the debugger.
  
  Table Manager: Added support to detect and ignore duplicate SSDTs within 
  the XSDT/RSDT. This error in the XSDT has been seen in the field.
  
  EFI and EDK2 support:
      Enabled /WX flag for MSVC builds
      Added support for AcpiOsStall, AcpiOsSleep, and AcpiOsGetTimer
      Added local support for 64-bit multiply and shift operations
      Added support to compile acpidump.efi on Windows
      Added OSL function stubs for interfaces not used under EFI
  
  Added additional support for the _DMA predefined name. _DMA returns a 
  buffer containing a resource template. This change add support within the 
  resource manager (AcpiWalkResourceBuffer) to walk and parse this list of 
  resource descriptors. Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Fixed a problem where the internal input line buffer(s) could 
  overflow if there are very long lines in the input ASL source code file. 
  Implemented buffer management that automatically increases the size of 
  the buffers as necessary.
  
  iASL: Added an option (-vx) to "expect" particular remarks, warnings and 
  errors. If the specified exception is not raised during compilation, the 
  compiler emits an error. This is intended to support the ASL test suite, 
  but may be useful in other contexts.
  
  iASL: Implemented a new predefined macro, __METHOD__, which returns a 
  string containing the name of the current control method that is being 
  compiled.
  
  iASL: Implemented debugger and table compiler support for the SDEI ACPI 
  table (Software Delegated Exception Interface). James Morse 
  <james.morse@arm.com>
  
  Unix/Linux makefiles: Added an option to disable compile optimizations. 
  The disable occurs when the NOOPT flag is set to TRUE. 
  theracermaster@gmail.com
  
  Acpidump: Added support for multiple DSDT and FACS tables. This can occur 
  when there are different tables for 32-bit versus 64-bit.
  
  Enhanced error reporting for the ASL test suite (ASLTS) by removing 
  unnecessary/verbose text, and emit the actual line number where an error 
  has occurred. These changes are intended to improve the usefulness of the 
  test suite.
  
  ----------------------------------------
  29 June 2017. Summary of changes for version 20170629:
  
  
  1) ACPICA kernel-resident subsystem:
  
  Tables: Implemented a deferred ACPI table verification. This is useful 
  for operating systems where the tables cannot be verified in the early 
  initialization stage due to early memory mapping limitations on some 
  architectures. Lv Zheng.
  
  Tables: Removed the signature validation for dynamically loaded tables. 
  Provides compatibility with other ACPI implementations. Previously, only 
  SSDT tables were allowed, as per the ACPI specification. Now, any table 
  signature can be used via the Load() operator. Lv Zheng.
  
  Tables: Fixed several mutex issues that could cause errors during table 
  acquisition. Lv Zheng.
  
  Tables: Fixed a problem where an ACPI warning could be generated if a 
  null pointer was passed to the AcpiPutTable interface. Lv Zheng.
  
  Tables: Added a mechanism to handle imbalances for the AcpiGetTable and 
  AcpiPutTable interfaces. This applies to the "late stage" table loading 
  when the use of AcpiPutTable is no longer required (since the system 
  memory manager is fully running and available). Lv Zheng.
  
  Fixed/Reverted a regression during processing of resource descriptors 
  that contain only a single EndTag. Fixes an AE_AML_NO_RESOURCE_END_TAG 
  exception in this case.
  
  Headers: IORT/SMMU support: Updated the SMMU models for Revision C of the 
  I/O Remapping specification. Robin Murphy <robin.murphy@arm.com>
  
  Interpreter: Fixed a possible fault if an Alias operator with an invalid 
  or duplicate target is encountered during Alias creation in 
  AcpiExCreateAlias. Alex James <theracermaster@gmail.com>
  
  Added an option to use designated initializers for function pointers. 
  Kees Cook <keescook@google.com>
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Allow compilation of External declarations with target pathnames 
  that refer to existing named objects within the table. Erik Schmauss.
  
  iASL: Fixed a regression when compiling FieldUnits. Fixes an error if a 
  FieldUnit name also is declared via External in the same table. Erik 
  Schmauss.
  
  iASL: Allow existing scope names within pathnames used in External 
  statements. For example:
      External (ABCD.EFGH) // ABCD exists, but EFGH is truly external
      Device (ABCD)
  
  iASL: IORT ACPI table: Implemented changes required to decode the new 
  Proximity Domain for the SMMUv3 IORT. Disassembler and Data Table 
  compiler. Ganapatrao Kulkarni <ganapatrao.kulkarni@cavium.com>
  
  Disassembler: Don't abort disassembly on errors from External() 
  statements. Erik Schmauss.
  
  Disassembler: fixed a possible fault when one of the Create*Field 
  operators references a Resource Template. ACPICA Bugzilla 1396.
  
  iASL: In the source code, resolved some naming inconsistences across the 
  parsing support. Fixes confusion between "Parse Op" and "Parse Node". 
  Adds a new file, aslparseop.c
  
  ----------------------------------------
  31 May 2017. Summary of changes for version 20170531:
  
  
  0) ACPI 6.2 support:
  
  The ACPI specification version 6.2 has been released and is available at
  http://uefi.org/specifications
  
  This version of ACPICA fully supports the ACPI 6.2 specification. Changes 
  are summarized below.
  
  New ACPI tables (Table Compiler/Disassembler/Templates):
      HMAT (Heterogeneous Memory Attributes Table)
      WSMT (Windows SMM Security Mitigation Table)
      PPTT (Processor Properties Topology Table)
  
  New subtables for existing ACPI tables:
      HEST (New subtable, Arch-deferred machine check)
      SRAT (New subtable, Arch-specific affinity structure)
      PCCT (New subtables, Extended PCC subspaces (types 3 and 4))
  
  Simple updates for existing ACPI tables:
      BGRT (two new flag bits)
      HEST (New bit defined for several subtables, GHES_ASSIST)
  
  New Resource Descriptors and Resource macros (Compiler/Disassembler):
      PinConfig()
      PinFunction()
      PinGroup()
      PinGroupConfig()
      PinGroupFunction()
      New type for hardware error notification (section 18.3.2.9)
  
  New predefined names/methods (Compiler/Interpreter):
      _HMA (Heterogeneous Memory Attributes)
      _LSI (Label Storage Information)
      _LSR (Label Storage Read)
      _LSW (Label Storage Write)
  
  ASL grammar/macro changes (Compiler):
      For() ASL macro, implemented with the AML while operator
      Extensions to Concatenate operator
      Support for multiple definition blocks in same ASL file
      Clarification for Buffer operator
      Allow executable AML code underneath all scopes (Devices, etc.)
      Clarification/change for the _OSI return value
      ASL grammar update for reference operators
      Allow a zero-length string for AML filename in DefinitionBlock
  
  Miscellaneous:
      New device object notification value
      Remove a notify value (0x0C) for graceful shutdown
      New UUIDs for processor/cache properties and
          physical package property
      New _HID, ACPI0014 (Wireless Power Calibration Device)
  
  
  1) ACPICA kernel-resident subsystem:
  
  Added support to disable ACPI events on hardware-reduced platforms. 
  Eliminates error messages of the form "Could not enable fixed event". Lv 
  Zheng
  
  Fixed a problem using Device/Thermal objects with the ObjectType and 
  DerefOf ASL operators. This support had not been fully/properly 
  implemented.
  
  Fixed a problem where if a Buffer object containing a resource template 
  was longer than the actual resource template, an error was generated -- 
  even though the AML is legal. This case has been seen in the field.
  
  Fixed a problem with the header definition of the MADT PCAT_COMPAT flag. 
  The values for DUAL_PIC and MULTIPLE_APIC were reversed.
  
  Added header file changes for the TPM2 ACPI table. Update to new version 
  of the TCG specification. Adds a new TPM2 subtable for ARM SMC.
  
  Exported the external interfaces AcpiAcquireMutex and AcpiReleaseMutex. 
  These interfaces are intended to be used only in conjunction with the 
  predefined _DLM method (Device Lock Method). "This object appears in a 
  device scope when AML access to the device must be synchronized with the 
  OS environment".
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Current Release:
      Non-Debug Version: 143.1K Code, 60.0K Data, 203.1K Total
      Debug Version:     204.0K Code, 84.3K Data, 288.3K Total
    Previous Release:
      Non-Debug Version: 141.7K Code, 58.5K Data, 200.2K Total
      Debug Version:     207.5K Code, 82.7K Data, 290.2K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Fixed a problem where an External() declaration could not refer to 
  a Field Unit. Erik Schmauss.
  
  Disassembler: Improved support for the Switch/Case operators. This 
  feature will disassemble AML code back to the original Switch operators 
  when possible, instead of an If..Else sequence. David Box
  
  iASL and disassembler: Improved the handling of multiple extraneous 
  parentheses for both ASL input and disassembled ASL output.
  
  Improved the behavior of the iASL compiler and disassembler to detect 
  improper use of external declarations
  
  Disassembler: Now aborts immediately upon detection of an unknown AML 
  opcode. The AML parser has no real way to recover from this, and can 
  result in the creation of an ill-formed parse tree that causes errors 
  later during the disassembly.
  
  All tools: Fixed a problem where the Unix application OSL did not handle 
  control-c correctly. For example, a control-c could incorrectly wake the 
  debugger.
  
  AcpiExec: Improved the Control-C handling and added a handler for 
  segmentation faults (SIGSEGV). Supports both Windows and Unix-like 
  environments.
  
  Reduced the verbosity of the generic unix makefiles. Previously, each 
  compilation displayed the full set of compiler options. This has been 
  eliminated as the options are easily inspected within the makefiles. Each 
  compilation now results in a single line of output.
  
  ----------------------------------------
  03 March 2017. Summary of changes for version 20170303:
  
  
  0) ACPICA licensing:
  
  The licensing information at the start of each source code module has 
  been updated. In addition to the Intel license, the dual GPLv2/BSD 
  license has been added for completeness. Now, a single version of the 
  source code should be suitable for all ACPICA customers. This is the 
  major change for this release since it affects all source code modules.
  
  
  1) ACPICA kernel-resident subsystem: 
  
  Fixed two issues with the common asltypes.h header that could cause 
  problems in some environments: (Kim Jung-uk)
      Removed typedef for YY_BUFFER_STATE ?
         Fixes an error with earlier versions of Flex.
      Removed use of FILE typedef (which is only defined in stdio.h)
  
  
  2) iASL Compiler/Disassembler and Tools: 
  
  Disassembler: fixed a regression introduced in 20170224. A fix for a 
  memory leak related to resource descriptor tags (names) could fault when 
  the disassembler was generated with 64-bit compilers.
  
  The ASLTS test suite has been updated to implement a new testing 
  architecture. During generation of the suite from ASL source, both the 
  ASL and ASL+ compilers are now validated, as well as the disassembler 
  itself (Erik Schmauss). The architecture executes as follows:
  
      For every ASL source module:
          Compile (legacy ASL compilation)
          Disassemble the resulting AML to ASL+ source code
          Compile the new ASL+ module
          Perform a binary compare on the legacy AML and the new ASL+ AML
      The ASLTS suite then executes normally using the AML binaries.
  
  ----------------------------------------
  24 February 2017. Summary of changes for version 20170224:
  
  
  1) ACPICA kernel-resident subsystem:
  
  Interpreter: Fixed two issues with the control method return value auto-
  repair feature, where an attempt to double-delete an internal object 
  could result in an ACPICA warning (for _CID repair and others). No fault 
  occurs, however, because the attempted deletion (actually a release to an 
  internal cache) is detected and ignored via object poisoning.
  
  Debugger: Fixed an AML interpreter mutex issue during the single stepping 
  of control methods. If certain debugger commands are executed during 
  stepping, a mutex acquire/release error could occur. Lv Zheng.
  
  Fixed some issues generating ACPICA with the Intel C compiler by 
  restoring the original behavior and compiler-specific include file in 
  acenv.h. Lv Zheng.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Current Release:
      Non-Debug Version: 141.7K Code, 58.5K Data, 200.2K Total
      Debug Version:     207.5K Code, 82.7K Data, 290.2K Total
    Previous Release:
      Non-Debug Version: 137.4K Code, 52.6K Data, 190.0K Total
      Debug Version:     201.5K Code, 82.2K Data, 283.7K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL/Disassembler: A preliminary version of a new ASL-to-ASL+ conversion 
  tool has been designed, implemented, and included in this release. The 
  key feature of this utility is that the original comments within the 
  input ASL file are preserved during the conversion process, and included 
  within the converted ASL+ file -- thus creating a transparent conversion 
  of existing ASL files to ASL+ (ASL 2.0). Erik Schmauss.
  
      Usage: iasl -ca <ASL-filename>  // Output is a .dsl file with 
  converted code
  
  iASL/Disassembler: Improved the detection and correct disassembly of 
  Switch/Case operators. This feature detects sequences of if/elseif/else 
  operators that originated from ASL Switch/Case/Default operators and 
  emits the original operators. David Box.
  
  iASL: Improved the IORT ACPI table support in the following areas. Lv 
  Zheng:
      Clear MappingOffset if the MappingCount is zero.
      Fix the disassembly of the SMMU GSU interrupt offset.
      Update the template file for the IORT table.
  
  Disassembler: Enhanced the detection and disassembly of resource 
  template/descriptor within a Buffer object. An EndTag descriptor is now 
  required to have a zero second byte, since all known ASL compilers emit 
  this. This helps eliminate incorrect decisions when a buffer is 
  disassembled (false positives on resource templates).
  
  ----------------------------------------
  19 January 2017. Summary of changes for version 20170119:
  
  
  1) General ACPICA software:
  
  Entire source code base: Added the 2017 copyright to all source code 
  legal/licensing module headers and utility/tool signons. This includes 
  the standard Linux dual-license header. This affects virtually every file 
  in the ACPICA core subsystem, iASL compiler, all ACPICA utilities, and 
  the ACPICA test suite.
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Removed/fixed an inadvertent remark when a method argument 
  containing a reference is used as a target operand within the method (and 
  never used as a simple argument), as in the example below. Jeffrey Hugo.
  
      dsdt.asl   1507:    Store(0x1, Arg0)
      Remark   2146 -                ^ Method Argument is never used (Arg0)
  
  All tools: Removed the bit width of the compiler that generated the tool 
  from the common signon for all user space tools. This proved to be 
  confusing and unnecessary. This includes similar removal of HARDWARE_NAME 
  from the generic makefiles (Thomas Petazzoni). Example below.
  
      Old:
      ASL+ Optimizing Compiler version 20170119-32
      ASL+ Optimizing Compiler version 20170119-64
  
      New:
      ASL+ Optimizing Compiler version 20170119
  
  ----------------------------------------
  22 December 2016. Summary of changes for version 20161222:
  
  
  1) ACPICA kernel-resident subsystem:
  
  AML Debugger: Implemented a new mechanism to simplify and enhance 
  debugger integration into all environments, including kernel debuggers 
  and user-space utilities, as well as remote debug services. This 
  mechanism essentially consists of new OSL interfaces to support debugger 
  initialization/termination, as well as wait/notify interfaces to perform 
  the debugger handshake with the host. Lv Zheng.
  
      New OSL interfaces:
          AcpiOsInitializeDebugger (void)
          AcpiOsTerminateDebugger (void)
          AcpiOsWaitCommandReady (void)
          AcpiOsNotifyCommandComplete (void)
  
      New OS services layer:
          osgendbg.c -- Example implementation, and used for AcpiExec
  
  Update for Generic Address Space (GAS) support: Although the AccessWidth 
  and/or BitOffset fields of the GAS are not often used, this change now 
  fully supports these fields. This affects the internal support for FADT 
  registers, registers in other ACPI data tables, and the AcpiRead and 
  AcpiWrite public interfaces. Lv Zheng.
  
  Sleep support: In order to simplify integration of ACPI sleep for the 
  various host operating systems, a new OSL interface has been introduced. 
  AcpiOsEnterSleep allows the host to perform any required operations 
  before the final write to the sleep control register(s) is performed by 
  ACPICA. Lv Zheng.
  
      New OSL interface:
          AcpiOsEnterSleep(SleepState, RegisterAValue, RegisterBValue)
  
      Called from these internal interfaces:
          AcpiHwLegacySleep
          AcpiHwExtendedSleep
  
  EFI support: Added a very small EFI/ACPICA example application. Provides 
  a simple demo for EFI integration, as well as assisting with resolution 
  of issues related to customer ACPICA/EFI integration. Lv Zheng. See:
  
      source/tools/efihello/efihello.c
  
  Local C library: Implemented several new functions to enhance ACPICA 
  portability, for environments where these clib functions are not 
  available (such as EFI). Lv Zheng:
      putchar
      getchar
      strpbrk
      strtok
      memmove
  
  Fixed a regression where occasionally a valid resource descriptor was 
  incorrectly detected as invalid at runtime, and a 
  AE_AML_NO_RESOURCE_END_TAG was returned.
  
  Fixed a problem with the recently implemented support that enables 
  control method invocations as Target operands to many ASL operators. 
  Warnings of this form: "Needed type [Reference], found [Processor]" were 
  seen at runtime for some method invocations.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Current Release:
      Non-Debug Version: 141.5K Code, 58.5K Data, 200.0K Total
      Debug Version:     201.7K Code, 82.7K Data, 284.4K Total
    Previous Release:
      Non-Debug Version: 140.5K Code, 58.5K Data, 198.9K Total
      Debug Version:     201.3K Code, 82.7K Data, 284.0K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  Disassembler: Enhanced output by adding the capability to detect and 
  disassemble ASL Switch/Case statements back to the original ASL source 
  code instead of if/else blocks. David Box.
  
  AcpiHelp: Split a large file into separate files based upon 
  functionality/purpose. New files are:
      ahaml.c
      ahasl.c
  
  ----------------------------------------
  17 November 2016. Summary of changes for version 20161117:
  
  
  1) ACPICA kernel-resident subsystem:
  
  Table Manager: Fixed a regression introduced in 20160729, "FADT support 
  cleanup". This was an attempt to remove all references in the source to 
  the FADT version 2, which never was a legal version number. It was 
  skipped because it was an early version of 64-bit support that was 
  eventually abandoned for the current 64-bit support.
  
  Interpreter: Fixed a problem where runtime implicit conversion was 
  incorrectly disabled for the ASL operators below. This brings the 
  behavior into compliance with the ACPI specification:
      FromBCD
      ToBCD
      ToDecimalString
      ToHexString
      ToInteger
      ToBuffer
  
  Table Manager: Added a new public interface, AcpiPutTable, used to 
  release and free an ACPI table returned by AcpiGetTable and related 
  interfaces. Lv Zheng.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Current Release:
      Non-Debug Version: 140.5K Code, 58.5K Data, 198.9K Total
      Debug Version:     201.3K Code, 82.7K Data, 284.0K Total
    Previous Release:
      Non-Debug Version: 140.4K Code, 58.1K Data, 198.5K Total
      Debug Version:     200.7K Code, 82.1K Data, 282.8K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  Disassembler: Fixed a regression for disassembly of Resource Template. 
  Detection of templates in the AML stream missed some types of templates.
  
  iASL: Fixed a problem where an Access Size error was returned for the PCC 
  address space when the AccessSize of the GAS register is greater than a 
  DWORD. Hoan Tran.
  
  iASL: Implemented several grammar changes for the operators below. These 
  changes are slated for the next version of the ACPI specification:
      RefOf        - Disallow method invocation as an operand
      CondRefOf    - Disallow method invocation as an operand
      DerefOf      - Disallow operands that use the result from operators 
  that
                     do not return a reference (Changed TermArg to 
  SuperName).
  
  iASL: Control method invocations are now allowed for Target operands, as 
  per the ACPI specification. Removed error for using a control method 
  invocation as a Target operand.
  
  Disassembler: Improved detection of Resource Templates, Unicode, and 
  Strings within Buffer objects. These subtypes do not contain a specific 
  opcode to indicate the originating ASL code, and they must be detected by 
  other means within the disassembler. 
  
  iASL: Implemented an optimization improvement for 32-bit ACPI tables 
  (DSDT/SSDT). For the 32-bit case only, compute the optimum integer opcode 
  only after 64-bit to 32-bit truncation. A truncation warning message is 
  still emitted, however.
  
  AcpiXtract: Implemented handling for both types of line terminators (LF 
  or CR/LF) so that it can accept AcpiDump output files from any system. 
  Peter Wu.
  
  AcpiBin: Added two new options for comparing AML files:
      -a: compare and display ALL mismatches
      -o: start compare at this offset into the second file
  
  ----------------------------------------
  30 September 2016. Summary of changes for version 20160930:
  
  
  1) ACPICA kernel-resident subsystem:
  
  Fixed a regression in the internal AcpiTbFindTable function where a non 
  AE_OK exception could inadvertently be returned even if the function did 
  not fail. This problem affects the following operators:
      DataTableRegion
      LoadTable
  
  Fixed a regression in the LoadTable operator where a load to any 
  namespace location other than the root no longer worked properly.
  
  Increased the maximum loop count value that will result in the 
  AE_AML_INFINITE_LOOP exception. This is a mechanism that is intended to 
  prevent infinite loops within the AML interpreter and thus the host OS 
  kernel. The value is increased from 0xFFFF to 0xFFFFF loops (65,535 to 
  1,048,575).
  
  Moved the AcpiGbl_MaxLoopIterations configuration variable to the public 
  acpixf.h file. This allows hosts to easily configure the maximum loop 
  count at runtime.
  
  Removed an illegal character in the strtoul64.c file. This character 
  caused errors with some C compilers.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Current Release:
      Non-Debug Version: 140.4K Code, 58.1K Data, 198.5K Total
      Debug Version:     200.7K Code, 82.1K Data, 282.8K Total
    Previous Release:
      Non-Debug Version: 140.0K Code, 58.1K Data, 198.1K Total
      Debug Version:     200.3K Code, 82.1K Data, 282.4K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  Disassembler: Fixed a problem with the conversion of Else{If{ blocks into 
  the simpler ASL ElseIf keyword. During the conversion, a trailing If 
  block could be lost and missing from the disassembled output.
  
  iASL: Fixed a missing parser rule for the ObjectType operator. For ASL+, 
  the missing rule caused a parse error when using the Index operator as an 
  operand to ObjectType. This construct now compiles properly. Example:
      ObjectType(PKG1[4]).
  
  iASL: Correctly handle unresolved symbols in the hardware map file (-lm 
  option). Previously, unresolved symbols could cause a protection fault. 
  Such symbols are now marked as unresolved in the map file.
  
  iASL: Implemented support to allow control method invocations as an 
  operand to the ASL DeRefOf operator. Example:
      DeRefOf(MTH1(Local0))
  
  Disassembler: Improved support for the ToPLD ASL macro. Detection of a 
  possible _PLD buffer now includes examination of both the normal buffer 
  length (16 or 20) as well as the surrounding AML package length.
  
  Disassembler: Fixed a problem with the decoding of complex expressions 
  within the Divide operator for ASL+. For the case where both the quotient 
  and remainder targets are specified, the entire statement cannot be 
  disassembled. Previously, the output incorrectly contained a mix of ASL- 
  and ASL+ operators. This mixed statement causes a syntax error when 
  compiled. Example:
      Divide (Add (INT1, 6), 128, RSLT, QUOT)  // was incorrectly 
  disassembled to:
      Divide (INT1 + 6, 128, RSLT, QUOT)
  
  iASL/Tools: Added support to process AML and non-AML ACPI tables 
  consistently. For the disassembler and AcpiExec, allow all types of ACPI 
  tables (AML and data tables). For the iASL -e option, allow only AML 
  tables (DSDT/SSDT).
  
  ----------------------------------------
  31 August 2016. Summary of changes for version 20160831:
  
  
  1) ACPICA kernel-resident subsystem:
  
  Improve support for the so-called "module-level code", which is defined 
  to be math, logical and control AML opcodes that appear outside of any 
  control method. This change improves the support by adding more opcodes 
  that can be executed in the manner. Some other issues have been solved, 
  and the ASL grammar changes to support such code under all scope 
  operators (Device, etc.) are complete. Lv Zheng.
  
  UEFI support: these OSL functions have been implemented. This is an 
  additional step toward supporting the AcpiExec utility natively (with 
  full hardware access) under UEFI. Marcelo Ferreira.
      AcpiOsReadPciConfiguration
      AcpiOsWritePciConfiguration
  
  Fixed a possible mutex error during control method auto-serialization. Lv 
  Zheng. 
  
  Updated support for the Generic Address Structure by fully implementing 
  all GAS fields when a 32-bit address is expanded to a 64-bit GAS. Lv 
  Zheng.
  
  Updated the return value for the internal _OSI method. Instead of 
  0xFFFFFFFF, the "Ones" value is now returned, which is 0xFFFFFFFFFFFFFFFF 
  for 64-bit ACPI tables. This fixes an incompatibility with other ACPI 
  implementations, and will be reflected and clarified in the next version 
  of the ACPI specification.
  
  Implemented two new table events that can be passed to an ACPICA table 
  handler. These events are used to indicate a table installation or 
  uninstallation. These events are used in addition to existed table load 
  and unload events. Lv Zheng.
  
  Implemented a cleanup for all internal string-to-integer conversions. 
  Consolidate multiple versions of this functionality and limit possible 
  bases to either 10 or 16 to simplify the code. Adds a new file, 
  utstrtoul64.
  
  Cleanup the inclusion order of the various compiler-specific headers. 
  This simplifies build configuration management. The compiler-specific 
  headers are now split out from the host-specific headers. Lv Zheng.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Current Release:
      Non-Debug Version: 140.1K Code, 58.1K Data, 198.1K Total
      Debug Version:     200.3K Code, 82.1K Data, 282.4K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL/AcpiExec: Added a command line option to display the build date/time 
  of the tool (-vd). This can be useful to verify that the correct version 
  of the tools are being used.
  
  AML Debugger: Implemented a new subcommand ("execute predef") to execute 
  all predefined control methods and names within the current namespace. 
  This can be useful for debugging problems with ACPI tables and the ACPI 
  namespace.
  
  ----------------------------------------
  29 July 2016. Summary of changes for version 20160729:
  
  
  1) ACPICA kernel-resident subsystem:
  
  Implemented basic UEFI support for the various ACPICA tools. This 
  includes:
  1) An OSL to implement the various AcpiOs* interfaces on UEFI.
  2) Support to obtain the ACPI tables on UEFI.
  3) Local implementation of required C library functions not available on 
  UEFI.
  4) A front-end (main) function for the tools for UEFI-related 
  initialization.
  
  The initial deployment of this support is the AcpiDump utility executing 
  as an UEFI application via EDK2 (EDKII, "UEFI Firmware Development Kit"). 
  Current environments supported are Linux/Unix. MSVC generation is not 
  supported at this time. See the generate/efi/README file for build 
  instructions. Lv Zheng.
  
  Future plans include porting the AcpiExec utility to execute natively on 
  the platform with I/O and memory access. This will allow viewing/dump of 
  the platform namespace and native execution of ACPI control methods that 
  access the actual hardware. To fully implement this support, the OSL 
  functions below must be implemented with UEFI interfaces. Any community 
  help in the implementation of these functions would be appreciated:
      AcpiOsReadPort
      AcpiOsWritePort
      AcpiOsReadMemory
      AcpiOsWriteMemory
      AcpiOsReadPciConfiguration
      AcpiOsWritePciConfiguration
  
  Restructured and standardized the C library configuration for ACPICA, 
  resulting in the various configuration options below. This includes a 
  global restructuring of the compiler-dependent and platform-dependent 
  include files. These changes may affect the existing platform-dependent 
  configuration files on some hosts. Lv Zheng. 
  
  The current C library configuration options appear below. For any issues, 
  it may be helpful to examine the existing compiler-dependent and 
  platform-dependent files as examples. Lv Zheng. 
  
  1) Linux kernel:
      ACPI_USE_STANDARD_HEADERS=n in order not to use system-provided C 
  library.
      ACPI_USE_SYSTEM_CLIBRARY=y in order not to use ACPICA mini C library.
  2) Unix/Windows/BSD applications:
      ACPI_USE_STANDARD_HEADERS=y in order to use system-provided C 
  library.
      ACPI_USE_SYSTEM_CLIBRARY=y in order not to use ACPICA mini C library.
  3) UEFI applications:
      ACPI_USE_STANDARD_HEADERS=n in order not to use system-provided C 
  library.
      ACPI_USE_SYSTEM_CLIBRARY=n in order to use ACPICA mini C library.
  4) UEFI applications (EDK2/StdLib):
      ACPI_USE_STANDARD_HEADERS=y in order to use EDK2 StdLib C library.
      ACPI_USE_SYSTEM_CLIBRARY=y in order to use EDK2 StdLib C library.
  
  
  AML interpreter: "module-level code" support. Allows for execution of so-
  called "executable" AML code (math/logical operations, etc.) outside of 
  control methods not just at the module level (top level) but also within 
  any scope declared outside of a control method - Scope{}, Device{}, 
  Processor{}, PowerResource{}, and ThermalZone{}. Lv Zheng. 
  
  Simplified the configuration of the "maximum AML loops" global option by 
  adding a global public variable, "AcpiGbl_MaxLoopIterations" which can be 
  modified at runtime.
  
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Current Release:
      Non-Debug Version: 139.1K Code, 22.9K Data, 162.0K Total
      Debug Version:     199.0K Code, 81.8K Data, 280.8K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Add full support for the RASF ACPI table (RAS Features Table). 
  Includes disassembler, data table compiler, and header support.
  
  iASL Expand "module-level code" support. Allows for 
  compilation/disassembly of so-called "executable" AML code (math/logical 
  operations, etc.) outside of control methods not just at the module level 
  (top level) but also within any scope declared outside of a control 
  method - Scope{}, Device{}, Processor{}, PowerResource{}, and 
  ThermalZone{}.
  
  AcpiDump: Added support for dumping all SSDTs on newer versions of 
  Windows. These tables are now easily available -- SSDTs are not available 
  through the registry on older versions.
  
  ----------------------------------------
  27 May 2016. Summary of changes for version 20160527:
  
  
  1) ACPICA kernel-resident subsystem:
  
  Temporarily reverted the new arbitrary bit length/alignment support in 
  AcpiHwRead/AcpiHwWrite for the Generic Address Structure. There have been 
  a number of regressions with the new code that need to be fully resolved 
  and tested before this support can be finally integrated into ACPICA. 
  Apologies for any inconveniences these issues may have caused.
  
  The ACPI message macros are not configurable (ACPI_MSG_ERROR, 
  ACPI_MSG_EXCEPTION, ACPI_MSG_WARNING, ACPI_MSG_INFO, ACPI_MSG_BIOS_ERROR, 
  and ACPI_MSG_BIOS_WARNING). Lv Zheng.
  
  Fixed a couple of GCC warnings associated with the use of the -Wcast-qual 
  option. Adds a new return macro, return_STR. Junk-uk Kim.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Current Release:
      Non-Debug Version: 136.8K Code, 51.6K Data, 188.4K Total
      Debug Version:     201.5K Code, 82.2K Data, 283.7K Total
    Previous Release:
      Non-Debug Version: 137.4K Code, 52.6K Data, 190.0K Total
      Debug Version:     200.9K Code, 82.2K Data, 283.1K Total
  
  ----------------------------------------
  22 April 2016. Summary of changes for version 20160422:
  
  1) ACPICA kernel-resident subsystem:
  
  Fixed a regression in the GAS (generic address structure) arbitrary bit 
  support in AcpiHwRead/AcpiHwWrite. Problem could cause incorrect behavior 
  and incorrect return values. Lv Zheng. ACPICA BZ 1270.
  
  ACPI 6.0: Added support for new/renamed resource macros. One new argument 
  was added to each of these macros, and the original name has been 
  deprecated. The AML disassembler will always disassemble to the new 
  names. Support for the new macros was added to iASL, disassembler, 
  resource manager, and the acpihelp utility. ACPICA BZ 1274.
  
      I2cSerialBus  -> I2cSerialBusV2
      SpiSerialBus  -> SpiSerialBusV2
      UartSerialBus -> UartSerialBusV2
  
  ACPI 6.0: Added support for a new integer field that was appended to the 
  package object returned by the _BIX method. This adds iASL compile-time 
  and AML runtime error checking. ACPICA BZ 1273.
  
  ACPI 6.1: Added support for a new PCCT subtable, "HW-Reduced Comm 
  Subspace Type2" (Headers, Disassembler, and data table compiler).
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Current Release:
      Non-Debug Version: 137.4K Code, 52.6K Data, 190.0K Total
      Debug Version:     201.5K Code, 82.2K Data, 283.7K Total
    Previous Release:
      Non-Debug Version: 137.1K Code, 51.5K Data, 188.6K Total
      Debug Version:     201.0K Code, 82.0K Data, 283.0K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Implemented an ASL grammar extension to allow/enable executable 
  "module-level code" to be created and executed under the various 
  operators that create new scopes. This type of AML code is already 
  supported in all known AML interpreters, and the grammar change will 
  appear in the next version of the ACPI specification. Simplifies the 
  conditional runtime creation of named objects under these object types: 
  
      Device
      PowerResource
      Processor
      Scope
      ThermalZone
  
  iASL: Implemented a new ASL extension, a "For" loop macro to add greater 
  ease-of-use to the ASL language. The syntax is similar to the 
  corresponding C operator, and is implemented with the existing AML While 
  opcode -- thus requiring no changes to existing AML interpreters.
  
      For (Initialize, Predicate, Update) {TermList}
  
  Grammar:
      ForTerm :=
          For (
              Initializer    // Nothing | TermArg => ComputationalData
              Predicate      // Nothing | TermArg => ComputationalData
              Update         // Nothing | TermArg => ComputationalData
          ) {TermList}
  
  
  iASL: The _HID/_ADR detection and validation has been enhanced to search 
  under conditionals in order to allow these objects to be conditionally 
  created at runtime.
  
  iASL: Fixed several issues with the constant folding feature. The 
  improvement allows better detection and resolution of statements that can 
  be folded at compile time. ACPICA BZ 1266. 
  
  iASL/Disassembler: Fixed a couple issues with the Else{If{}...} 
  conversion to the ASL ElseIf operator where incorrect ASL code could be 
  generated.
  
  iASL/Disassembler: Fixed a problem with the ASL+ code disassembly where 
  sometimes an extra (and extraneous) set of parentheses were emitted for 
  some combinations of operators. Although this did not cause any problems 
  with recompilation of the disassembled code, it made the code more 
  difficult to read. David Box. ACPICA BZ 1231.
  
  iASL: Changed to ignore the unreferenced detection for predefined names 
  of resource descriptor elements, when the resource descriptor is 
  created/defined within a control method.
  
  iASL: Disassembler: Fix a possible fault with externally declared Buffer 
  objects.
  
  ----------------------------------------
  18 March 2016. Summary of changes for version 20160318:
  
  1) ACPICA kernel-resident subsystem:
  
  Added support for arbitrary bit lengths and bit offsets for registers 
  defined by the Generic Address Structure. Previously, only aligned bit 
  lengths of 8/16/32/64 were supported. This was sufficient for many years, 
  but recently some machines have been seen that require arbitrary bit-
  level support. ACPICA BZ 1240. Lv Zheng.
  
  Fixed an issue where the \_SB._INI method sometimes must be evaluated 
  before any _REG methods are evaluated. Lv Zheng.
  
  Implemented several changes related to ACPI table support 
  (Headers/Disassembler/TableCompiler):
  NFIT: For ACPI 6.1, updated to add some additional new fields and 
  constants.
  FADT: Updated a warning message and set compliance to ACPI 6.1 (Version 
  6).
  DMAR: Added new constants per the 10/2014 DMAR spec.
  IORT: Added new subtable per the 10/2015 IORT spec.
  HEST: For ACPI 6.1, added new constants and new subtable.
  DBG2: Added new constants per the 12/2015 DBG2 spec.
  FPDT: Fixed several incorrect fields, add the FPDT boot record structure. 
  ACPICA BZ 1249.
  ERST/EINJ: Updated disassembler with new "Execute Timings" actions.
  
  Updated header support for the DMAR table to match the current version of 
  the related spec.
  
  Added extensions to the ASL Concatenate operator to allow any ACPI object 
  to be passed as an operand. Any object other than Integer/String/Buffer 
  simply returns a string containing the object type. This extends the 
  usefulness of the Printf macros. Previously, Concatenate would abort the 
  control method if a non-data object was encountered.
  
  ACPICA source code: Deployed the C "const" keyword across the source code 
  where appropriate. ACPICA BZ 732. Joerg Sonnenberger (NetBSD).
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Current Release:
      Non-Debug Version: 137.1K Code, 51.5K Data, 188.6K Total
      Debug Version:     201.0K Code, 82.0K Data, 283.0K Total
    Previous Release:
      Non-Debug Version: 136.2K Code, 51.5K Data, 187.7K Total
      Debug Version:     200.4K Code, 82.0K Data, 282.4K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL/Disassembler: Improved the heuristic used to determine the number of 
  arguments for an externally defined control method (a method in another 
  table). Although this is an improvement, there is no deterministic way to 
  "guess" the number of method arguments. Only the ACPI 6.0 External opcode 
  will completely solve this problem as it is deployed (automatically) in 
  newer BIOS code.
  
  iASL/Disassembler: Fixed an ordering issue for emitted External() ASL 
  statements that could cause errors when the disassembled file is 
  compiled. ACPICA BZ 1243. David Box.
  
  iASL: Fixed a regression caused by the merger of the two versions of the 
  local strtoul64. Because of a dependency on a global variable, strtoul64 
  could return an error for integers greater than a 32-bit value. ACPICA BZ 
  1260.
  
  iASL: Fixed a regression where a fault could occur for an ASL Return 
  statement if it invokes a control method that is not resolved. ACPICA BZ 
  1264.
  
  AcpiXtract: Improved input file validation: detection of binary files and 
  non-acpidump text files.
  
  ----------------------------------------
  12 February 2016. Summary of changes for version 20160212:
  
  1) ACPICA kernel-resident subsystem:
  
  Implemented full support for the ACPI 6.1 specification (released in 
  January). This version of the specification is available at:  
  http://www.uefi.org/specifications
  
  Only a relatively small number of changes were required in ACPICA to 
  support ACPI 6.1, in these areas:
  - New predefined names
  - New _HID values
  - A new subtable for HEST
  - A few other header changes for new values
  
  Ensure \_SB_._INI is executed before any _REG methods are executed. There 
  appears to be existing BIOS code that relies on this behavior. Lv Zheng.
  
  Reverted a change made in version 20151218 which enabled method 
  invocations to be targets of various ASL operators (SuperName and Target 
  grammar elements). While the new behavior is supported by the ACPI 
  specification, other AML interpreters do not support this behavior and 
  never will. The ACPI specification will be updated for ACPI 6.2 to remove 
  this support. Therefore, the change was reverted to the original ACPICA 
  behavior.
  
  ACPICA now supports the GCC 6 compiler.
  
  Current Release: (Note: build changes increased sizes)
      Non-Debug Version: 136.2K Code, 51.5K Data, 187.7K Total
      Debug Version:     200.4K Code, 82.0K Data, 282.4K Total
  Previous Release:
      Non-Debug Version: 102.7K Code, 28.4K Data, 131.1K Total
      Debug Version:     200.4K Code, 81.9K Data, 282.3K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  Completed full support for the ACPI 6.0 External() AML opcode. The 
  compiler emits an external AML opcode for each ASL External statement. 
  This opcode is used by the disassembler to assist with the disassembly of 
  external control methods by specifying the required number of arguments 
  for the method. AML interpreters do not use this opcode. To ensure that 
  interpreters do not even see the opcode, a block of one or more external 
  opcodes is surrounded by an "If(0)" construct. As this feature becomes 
  commonly deployed in BIOS code, the ability of disassemblers to correctly 
  disassemble AML code will be greatly improved. David Box.
  
  iASL: Implemented support for an optional cross-reference output file. 
  The -lx option will create a the cross-reference file with the suffix 
  "xrf". Three different types of cross-reference are created in this file:
  - List of object references made from within each control method
  - Invocation (caller) list for each user-defined control method
  - List of references to each non-method object in the namespace
  
  iASL: Method invocations as ASL Target operands are now disallowed and 
  flagged as errors in preparation for ACPI 6.2 (see the description of the 
  problem above).
  
  ----------------------------------------
  8 January 2016. Summary of changes for version 20160108:
  
  1) ACPICA kernel-resident subsystem:
  
  Updated all ACPICA copyrights and signons to 2016: Added the 2016 
  copyright to all source code module headers and utility/tool signons. 
  This includes the standard Linux dual-license header. This affects 
  virtually every file in the ACPICA core subsystem, iASL compiler, all 
  ACPICA utilities, and the ACPICA test suite.
  
  Fixed a regression introduced in version 20151218 concerning the 
  execution of so-called module-level ASL/AML code. Namespace objects 
  created under a module-level If() construct were not properly/fully 
  entered into the namespace and could cause an interpreter fault when 
  accessed.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
  Current Release:
      Non-Debug Version: 102.7K Code, 28.4K Data, 131.1K Total
      Debug Version:     200.4K Code, 81.9K Data, 282.4K Total
    Previous Release:
      Non-Debug Version: 102.6K Code, 28.4K Data, 131.0K Total
      Debug Version:     200.3K Code, 81.9K Data, 282.3K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  Fixed a problem with the compilation of the GpioIo and GpioInt resource 
  descriptors. The _PIN field name was incorrectly defined to be an array 
  of 32-bit values, but the _PIN values are in fact 16 bits each. This 
  would cause incorrect bit width warnings when using Word (16-bit) fields 
  to access the descriptors.
  
  
  ----------------------------------------
  18 December 2015. Summary of changes for version 20151218:
  
  1) ACPICA kernel-resident subsystem:
  
  Implemented per-AML-table execution of "module-level code" as individual 
  ACPI tables are loaded into the namespace during ACPICA initialization. 
  In other words, any module-level code within an AML table is executed 
  immediately after the table is loaded, instead of batched and executed 
  after all of the tables have been loaded. This provides compatibility 
  with other ACPI implementations. ACPICA BZ 1219. Bob Moore, Lv Zheng, 
  David Box.
  
  To fully support the feature above, the default operation region handlers 
  for the SystemMemory, SystemIO, and PCI_Config address spaces are now 
  installed before any ACPI tables are loaded. This enables module-level 
  code to access these address spaces during the table load and module-
  level code execution phase. ACPICA BZ 1220. Bob Moore, Lv Zheng, David 
  Box.
  
  Implemented several changes to the internal _REG support in conjunction 
  with the changes above. Also, changes to the AcpiExec/AcpiNames/Examples 
  utilities for the changes above. Although these tools were changed, host 
  operating systems that simply use the default handlers for SystemMemory, 
  SystemIO, and PCI_Config spaces should not require any update. Lv Zheng.
  
  For example, in the code below, DEV1 is conditionally added to the 
  namespace by the DSDT via module-level code that accesses an operation 
  region. The SSDT references DEV1 via the Scope operator. DEV1 must be 
  created immediately after the DSDT is loaded in order for the SSDT to 
  successfully reference DEV1. Previously, this code would cause an 
  AE_NOT_EXIST exception during the load of the SSDT. Now, this code is 
  fully supported by ACPICA.
  
      DefinitionBlock ("", "DSDT", 2, "Intel", "DSDT1", 1)
      {
          OperationRegion (OPR1, SystemMemory, 0x400, 32)
          Field (OPR1, AnyAcc, NoLock, Preserve)
          {
              FLD1, 1
          }
          If (FLD1)
          {
              Device (\DEV1)
              {
              }
          }
      }
      DefinitionBlock ("", "SSDT", 2, "Intel", "SSDT1", 1)
      {
          External (\DEV1, DeviceObj)
          Scope (\DEV1)
          {
          }
      }
  
  Fixed an AML interpreter problem where control method invocations were 
  not handled correctly when the invocation was itself a SuperName argument 
  to another ASL operator. In these cases, the method was not invoked. 
  ACPICA BZ 1002. Affects the following ASL operators that have a SuperName 
  argument:
      Store
      Acquire, Wait
      CondRefOf, RefOf
      Decrement, Increment
      Load, Unload
      Notify
      Signal, Release, Reset
      SizeOf
  
  Implemented automatic String-to-ObjectReference conversion support for 
  packages returned by predefined names (such as _DEP). A common BIOS error 
  is to add double quotes around an ObjectReference namepath, which turns 
  the reference into an unexpected string object. This support detects the 
  problem and corrects it before the package is returned to the caller that 
  invoked the method. Lv Zheng.
  
  Implemented extensions to the Concatenate operator. Concatenate now 
  accepts any type of object, it is not restricted to simply 
  Integer/String/Buffer. For objects other than these 3 basic data types, 
  the argument is treated as a string containing the name of the object 
  type. This expands the utility of Concatenate and the Printf/Fprintf 
  macros. ACPICA BZ 1222.
  
  Cleaned up the output of the ASL Debug object. The timer() value is now 
  optional and no longer emitted by default. Also, the basic data types of 
  Integer/String/Buffer are simply emitted as their values, without a data 
  type string -- since the data type is obvious from the output. ACPICA BZ 
  1221.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Current Release:
      Non-Debug Version: 102.6K Code, 28.4K Data, 131.0K Total
      Debug Version:     200.3K Code, 81.9K Data, 282.3K Total
    Previous Release:
      Non-Debug Version: 102.0K Code, 28.3K Data, 130.3K Total
      Debug Version:     199.6K Code, 81.8K Data, 281.4K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Fixed some issues with the ASL Include() operator. This operator 
  was incorrectly defined in the iASL parser rules, causing a new scope to 
  be opened for the code within the include file. This could lead to 
  several issues, including allowing ASL code that is technically illegal 
  and not supported by AML interpreters. Note, this does not affect the 
  related #include preprocessor operator. ACPICA BZ 1212.
  
  iASL/Disassembler: Implemented support for the ASL ElseIf operator. This 
  operator is essentially an ASL macro since there is no AML opcode 
  associated with it. The code emitted by the iASL compiler for ElseIf is 
  an Else opcode followed immediately by an If opcode. The disassembler 
  will now emit an ElseIf if it finds an Else immediately followed by an 
  If. This simplifies the decoded ASL, especially for deeply nested 
  If..Else and large Switch constructs. Thus, the disassembled code more 
  closely follows the original source ASL. ACPICA BZ 1211. Example:
  
      Old disassembly:
          Else
          {
              If (Arg0 == 0x02)
              {
                  Local0 = 0x05
              }
          }
  
      New disassembly:
          ElseIf (Arg0 == 0x02)
          {
              Local0 = 0x05
          }
  
  AcpiExec: Added support for the new module level code behavior and the 
  early region installation. This required a small change to the 
  initialization, since AcpiExec must install its own operation region 
  handlers.
  
  AcpiExec: Added support to make the debug object timer optional. Default 
  is timer disabled. This cleans up the debug object output -- the timer 
  data is rarely used.
  
  AcpiExec: Multiple ACPI tables are now loaded in the order that they 
  appear on the command line. This can be important when there are 
  interdependencies/references between the tables.
  
  iASL/Templates. Add support to generate template files with multiple 
  SSDTs within a single output file. Also added ommand line support to 
  specify the number of SSDTs (in addition to a single DSDT). ACPICA BZ 
  1223, 1225.
  
  
  ----------------------------------------
  24 November 2015. Summary of changes for version 20151124:
  
  1) ACPICA kernel-resident subsystem:
  
  Fixed a possible regression for a previous update to FADT handling. The 
  FADT no longer has a fixed table ID, causing some issues with code that 
  was hardwired to a specific ID. Lv Zheng.
  
  Fixed a problem where the method auto-serialization could interfere with 
  the current SyncLevel. This change makes the auto-serialization support 
  transparent to the SyncLevel support and management.
  
  Removed support for the _SUB predefined name in AcpiGetObjectInfo. This 
  interface is intended for early access to the namespace during the 
  initial namespace device discovery walk. The _SUB method has been seen to 
  access operation regions in some cases, causing errors because the 
  operation regions are not fully initialized.
  
  AML Debugger: Fixed some issues with the terminate/quit/exit commands 
  that can cause faults. Lv Zheng.
  
  AML Debugger: Add thread ID support so that single-step mode only applies 
  to the AML Debugger thread. This prevents runtime errors within some 
  kernels. Lv Zheng. 
  
  Eliminated extraneous warnings from AcpiGetSleepTypeData. Since the _Sx 
  methods that are invoked by this interface are optional, removed warnings 
  emitted for the case where one or more of these methods do not exist. 
  ACPICA BZ 1208, original change by Prarit Bhargava.
  
  Made a major pass through the entire ACPICA source code base to 
  standardize formatting that has diverged a bit over time. There are no 
  functional changes, but this will of course cause quite a few code 
  differences from the previous ACPICA release.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Current Release:
      Non-Debug Version: 102.0K Code, 28.3K Data, 130.3K Total
      Debug Version:     199.6K Code, 81.8K Data, 281.4K Total
    Previous Release:
      Non-Debug Version: 101.7K Code, 27.9K Data, 129.6K Total
      Debug Version:     199.3K Code, 81.4K Data, 280.7K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL/acpiexec/acpixtract/disassembler: Added support to allow multiple 
  definition blocks within a single ASL file and the resulting AML file. 
  Support for this type of file was also added to the various tools that 
  use binary AML files: acpiexec, acpixtract, and the AML disassembler. The 
  example code below shows two definition blocks within the same file:
  
      DefinitionBlock ("dsdt.aml", "DSDT", 2, "Intel", "Template", 
  0x12345678)
      {
      }
      DefinitionBlock ("", "SSDT", 2, "Intel", "Template", 0xABCDEF01)
      {
      }
  
  iASL: Enhanced typechecking for the Name() operator. All expressions for 
  the value of the named object must be reduced/folded to a single constant 
  at compile time, as per the ACPI specification (the AML definition of 
  Name()).
  
  iASL: Fixed some code indentation issues for the -ic and -ia options (C 
  and assembly headers). Now all emitted code correctly begins in column 1.
  
  iASL: Added an error message for an attempt to open a Scope() on an 
  object defined in an SSDT. The DSDT is always loaded into the namespace 
  first, so any attempt to open a Scope on an SSDT object will fail at 
  runtime.
  
  
  ----------------------------------------
  30 September 2015. Summary of changes for version 20150930:
  
  1) ACPICA kernel-resident subsystem:
  
  Debugger: Implemented several changes and bug fixes to assist support for 
  the in-kernel version of the AML debugger. Lv Zheng.
  - Fix the "predefined" command for in-kernel debugger.
  - Do not enter debug command loop for the help and version commands.
  - Disallow "execute" command during execution/single-step of a method.
  
  Interpreter: Updated runtime typechecking for all operators that have 
  target operands. The operand is resolved and validated that it is legal. 
  For example, the target cannot be a non-data object such as a Device, 
  Mutex, ThermalZone, etc., as per the ACPI specification.
  
  Debugger: Fixed the double-mutex user I/O handshake to work when local 
  deadlock detection is enabled.
  
  Debugger: limited display of method locals and arguments (LocalX and 
  ArgX) to only those that have actually been initialized. This prevents 
  lines of extraneous output.
  
  Updated the definition of the NFIT table to correct the bit polarity of 
  one flag: ACPI_NFIT_MEM_ARMED --> ACPI_NFIT_MEM_NOT_ARMED
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Current Release:
      Non-Debug Version: 101.7K Code, 27.9K Data, 129.6K Total
      Debug Version:     199.3K Code, 81.4K Data, 280.7K Total
    Previous Release:
      Non-Debug Version: 101.3K Code, 27.7K Data, 129.0K Total
      Debug Version:     198.6K Code, 80.9K Data, 279.5K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Improved the compile-time typechecking for operands of many of the 
  ASL operators:
  
  -- Added an option to disable compiler operand/operator typechecking (-
  ot).
  
  -- For the following operators, the TermArg operands are now validated 
  when possible to be Integer data objects: BankField, OperationRegion, 
  DataTableRegion, Buffer, and Package.
  
  -- Store (Source, Target): Both the source and target operands are 
  resolved and checked that the operands are both legal. For example, 
  neither operand can be a non-data object such as a Device, Mutex, 
  ThermalZone, etc. Note, as per the ACPI specification, the CopyObject 
  operator can be used to store an object to any type of target object.
  
  -- Store (Source, Target): If the source is a Package object, the target 
  must be a Package object, LocalX, ArgX, or Debug. Likewise, if the target 
  is a Package, the source must also be a Package.
  
  -- Store (Source, Target): A warning is issued if the source and target 
  resolve to the identical named object.
  
  -- Store (Source, <method invocation>): An error is generated for the 
  target method invocation, as this construct is not supported by the AML 
  interpreter.
  
  -- For all ASL math and logic operators, the target operand must be a 
  data object (Integer, String, Buffer, LocalX, ArgX, or Debug). This 
  includes the function return value also.
  
  -- External declarations are also included in the typechecking where 
  possible. External objects defined using the UnknownObj keyword cannot be 
  typechecked, however.
  
  iASL and Disassembler: Added symbolic (ASL+) support for the ASL Index 
  operator:
  - Legacy code: Index(PKG1, 3)
  - New ASL+ code: PKG1[3]
  This completes the ACPI 6.0 ASL+ support as it was the only operator not 
  supported.
  
  iASL: Fixed the file suffix for the preprocessor output file (.i). Two 
  spaces were inadvertently appended to the filename, causing file access 
  and deletion problems on some systems.
  
  ASL Test Suite (ASLTS): Updated the master makefile to generate all 
  possible compiler output files when building the test suite -- thus 
  exercising these features of the compiler. These files are automatically 
  deleted when the test suite exits.
  
  
  ----------------------------------------
  18 August 2015. Summary of changes for version 20150818:
  
  1) ACPICA kernel-resident subsystem:
  
  Fix a regression for AcpiGetTableByIndex interface causing it to fail. Lv 
  Zheng. ACPICA BZ 1186.
  
  Completed development to ensure that the ACPICA Disassembler and Debugger 
  are fully standalone components of ACPICA. Removed cross-component 
  dependences. Lv Zheng.
  
  The max-number-of-AML-loops is now runtime configurable (previously was 
  compile-time only). This is essentially a loop timeout to force-abort 
  infinite AML loops. ACPCIA BZ 1192.
  
  Debugger: Cleanup output to dump ACPI names and namepaths without any 
  trailing underscores. Lv Zheng. ACPICA BZ 1135.
  
  Removed unnecessary conditional compilations across the Debugger and 
  Disassembler components where entire modules could be left uncompiled.
  
  The aapits test is deprecated and has been removed from the ACPICA git 
  tree. The test has never been completed and has not been maintained, thus 
  becoming rather useless. ACPICA BZ 1015, 794.
  
  A batch of small changes to close bugzilla and other reports:
  - Remove duplicate code for _PLD processing. ACPICA BZ 1176.
  - Correctly cleanup after a ACPI table load failure. ACPICA BZ 1185.
  - iASL: Support POSIX yacc again in makefile. Jung-uk Kim.
  - ACPI table support: general cleanup and simplification. Lv Zheng, Bob 
  Moore.
  - ACPI table support: fix for a buffer read overrun in AcpiTbFindTable. 
  ACPICA BZ 1184.
  - Enhance parameter validation for DataTableRegion and LoadTable ASL/AML 
  operators.
  - Debugger: Split debugger initialization/termination interfaces. Lv 
  Zheng.
  - AcpiExec: Emit OemTableId for SSDTs during the load phase for table 
  identification.
  - AcpiExec: Add debug message during _REG method phase during table 
  load/init.
  - AcpiNames: Fix a regression where some output was missing and no longer 
  emitted.
  - Debugger: General cleanup and simplification. Lv Zheng.
  - Disassembler: Cleanup use of several global option variables. Lv Zheng.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Current Release:
      Non-Debug Version: 101.3K Code, 27.7K Data, 129.0K Total
      Debug Version:     198.6K Code, 80.9K Data, 279.5K Total
    Previous Release:
      Non-Debug Version: 100.9K Code, 24.5K Data, 125.4K Total
      Debug Version:     197.8K Code, 81.5K Data, 279.3K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  AcpiExec: Fixed a problem where any more than 32 ACPI tables in the XSDT 
  were not handled properly and caused load errors. Now, properly invoke 
  and use the ACPICA auto-reallocate mechanism for ACPI table data 
  structures. ACPICA BZ 1188
  
  AcpiNames: Add command-line wildcard support for ACPI table files. ACPICA 
  BZ 1190.
  
  AcpiExec and AcpiNames: Add -l option to load ACPI tables only. For 
  AcpiExec, this means that no control methods (like _REG/_INI/_STA) are 
  executed during initialization. ACPICA BZ 1187, 1189.
  
  iASL/Disassembler: Implemented a prototype "listing" mode that emits AML 
  that corresponds to each disassembled ASL statement, to simplify 
  debugging. ACPICA BZ 1191.
  
  Debugger: Add option to the "objects" command to display a summary of the 
  current namespace objects (Object type and count). This is displayed if 
  the command is entered with no arguments.
  
  AcpiNames: Add -x option to specify debug level, similar to AcpiExec.
  
  
  ----------------------------------------
  17 July 2015. Summary of changes for version 20150717:
  
  1) ACPICA kernel-resident subsystem:
  
  Improved the partitioning between the Debugger and Disassembler 
  components. This allows the Debugger to be used standalone within kernel 
  code without the Disassembler (which is used for single stepping also). 
  This renames and moves one file, dmobject.c to dbobject.c. Lv Zheng.
  
  Debugger: Implemented a new command to trace the execution of control 
  methods (Trace). This is especially useful for the in-kernel version of 
  the debugger when file I/O may not be available for method trace output. 
  See the ACPICA reference for more information. Lv Zheng.
  
  Moved all C library prototypes (used for the local versions of these 
  functions when requested) to a new header, acclib.h
  Cleaned up the use of non-ANSI C library functions. These functions are 
  implemented locally in ACPICA. Moved all such functions to a common 
  source file, utnonansi.c
  
  Debugger: Fixed a problem with the "!!" command (get last command 
  executed) where the debugger could enter an infinite loop and eventually 
  crash.
  
  Removed the use of local macros that were used for some of the standard C 
  library functions to automatically cast input parameters. This mostly 
  affected the is* functions where the input parameter is defined to be an 
  int. This required a few modifications to the main ACPICA source code to 
  provide casting for these functions and eliminate possible compiler 
  warnings for these parameters.
  
  Across the source code, added additional status/error checking to resolve 
  issues discovered by static source code analysis tools such as Coverity.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Current Release:
      Non-Debug Version: 100.9K Code, 24.5K Data, 125.4K Total
      Debug Version:     197.8K Code, 81.5K Data, 279.3K Total
    Previous Release:
      Non-Debug Version: 100.6K Code, 27.6K Data, 128.2K Total
      Debug Version:     196.2K Code, 81.0K Data, 277.2K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Fixed a regression where the device map file feature no longer 
  worked properly when used in conjunction with the disassembler. It only 
  worked properly with the compiler itself.
  
  iASL: Implemented a new warning for method LocalX variables that are set 
  but never used (similar to a C compiler such as gcc). This also applies 
  to ArgX variables that are not defined by the parent method, and are 
  instead (legally) used as local variables.
  
  iASL/Preprocessor: Finished the pass-through of line numbers from the 
  preprocessor to the compiler. This ensures that compiler errors/warnings 
  have the correct original line numbers and filenames, regardless of any 
  #include files.
  
  iASL/Preprocessor: Fixed a couple of issues with comment handling and the 
  pass-through of comments to the preprocessor output file (which becomes 
  the compiler input file). Also fixed a problem with // comments that 
  appear after a math expression.
  
  iASL: Added support for the TCPA server table to the table compiler and 
  template generator. (The client table was already previously supported)
  
  iASL/Preprocessor: Added a permanent #define of the symbol "__IASL__" to 
  identify the iASL compiler.
  
  Cleaned up the use of the macros NEGATIVE and POSITIVE which were defined 
  multiple times. The new names are ACPI_SIGN_NEGATIVE and 
  ACPI_SIGN_POSITIVE.
  
  AcpiHelp: Update to expand help messages for the iASL preprocessor 
  directives.
  
  
  ----------------------------------------
  19 June 2015. Summary of changes for version 20150619:
  
  Two regressions in version 20150616 have been addressed:
  
  Fixes some problems/issues with the C library macro removal (ACPI_STRLEN, 
  etc.) This update changes ACPICA to only use the standard headers for 
  functions, or the prototypes for the local versions of the C library 
  functions. Across the source code, this required some additional casts 
  for some Clib invocations for portability. Moved all local prototypes to 
  a new file, acclib.h
  
  Fixes several problems with recent changes to the handling of the FACS 
  table that could cause some systems not to boot.
  
  
  ----------------------------------------
  16 June 2015. Summary of changes for version 20150616:
  
  
  1) ACPICA kernel-resident subsystem:
  
  Across the entire ACPICA source code base, the various macros for the C 
  library functions (such as ACPI_STRLEN, etc.) have been removed and 
  replaced by the standard C library names (strlen, etc.) The original 
  purpose for these macros is no longer applicable. This simplification 
  reduces the number of macros used in the ACPICA source code 
  significantly, improving readability and maintainability.
  
  Implemented support for a new ACPI table, the OSDT. This table, the 
  "override" SDT, can be loaded directly by the host OS at boot time. It 
  enables the replacement of existing namespace objects that were installed 
  via the DSDT and/or SSDTs. The primary purpose for this is to replace 
  buggy or incorrect ASL/AML code obtained via the BIOS. The OSDT is slated 
  for inclusion in a future version of the ACPI Specification. Lv Zheng/Bob 
  Moore.
  
  Added support for systems with (improperly) two FACS tables -- a "32-bit" 
  table (via FADT 32-bit legacy field) and a "64-bit" table (via the 64-bit 
  X field). This change will support both automatically. There continues to 
  be systems found with this issue. This support requires a change to the 
  AcpiSetFirmwareWakingVector interface. Also, a public global variable has 
  been added to allow the host to select which FACS is desired 
  (AcpiGbl_Use32BitFacsAddresses). See the ACPICA reference for more 
  details Lv Zheng.
  
  Added a new feature to allow for systems that do not contain an FACS. 
  Although this is already supported on hardware-reduced platforms, the 
  feature has been extended for all platforms. The reasoning is that we do 
  not want to abort the entire ACPICA initialization just because the 
  system is seriously buggy and has no FACS.
  
  Fixed a problem where the GUID strings for NFIT tables (in acuuid.h) were 
  not correctly transcribed from the ACPI specification in ACPICA version 
  20150515.
  
  Implemented support for the _CLS object in the AcpiGetObjectInfo external 
  interface.
  
  Updated the definitions of the TCPA and TPM2 ACPI tables to the more 
  recent TCG ACPI Specification, December 14, 2014. Table disassembler and 
  compiler also updated. Note: The TCPA "server" table is not supported by 
  the disassembler/table-compiler at this time.
  
  ACPI 6.0: Added definitions for the new GIC version field in the MADT.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Current Release:
      Non-Debug Version: 100.6K Code, 27.6K Data, 128.2K Total
      Debug Version:     196.2K Code, 81.0K Data, 277.2K Total
    Previous Release:
      Non-Debug Version:  99.9K Code, 27.5K Data, 127.4K Total
      Debug Version:     195.2K Code, 80.8K Data, 276.0K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  Disassembler: Fixed a problem with the new symbolic operator disassembler 
  where incorrect ASL code could be emitted in some cases for the "non-
  commutative" operators -- Subtract, Divide, Modulo, ShiftLeft, and 
  ShiftRight. The actual problem cases seem to be rather unusual in common 
  ASL code, however. David Box.
  
  Modified the linux version of acpidump to obtain ACPI tables from not 
  just /dev/mem (which may not exist) and /sys/firmware/acpi/tables. Lv 
  Zheng.
  
  iASL: Fixed a problem where the user preprocessor output file (.i) 
  contained extra data that was not expected. The compiler was using this 
  file as a temporary file and passed through #line directives in order to 
  keep compiler error messages in sync with the input file and line number 
  across multiple include files. The (.i) is no longer a temporary file as 
  the compiler uses a new, different file for the original purpose.
  
  iASL: Fixed a problem where comments within the original ASL source code 
  file were not passed through to the preprocessor output file, nor any 
  listing files.
  
  iASL: Fixed some issues for the handling of the "#include" preprocessor 
  directive and the similar (but not the same) "Include" ASL operator.
  
  iASL: Add support for the new OSDT in both the disassembler and compiler.
  
  iASL: Fixed a problem with the constant folding support where a Buffer 
  object could be incorrectly generated (incorrectly formed) during a 
  conversion to a Store() operator.
  
  AcpiHelp: Updated for new NFIT GUIDs, "External" AML opcode, and new 
  description text for the _REV predefined name. _REV now permanently 
  returns 2, as per the ACPI 6.0 specification.
  
  Debugger: Enhanced the output of the Debug ASL object for references 
  produced by the Index operator. For Buffers and strings, only output the 
  actual byte pointed to by the index. For packages, only print the single 
  package element decoded by the index. Previously, the entire 
  buffer/string/package was emitted.
  
  iASL/Table-compiler: Fixed a regression where the "generic" data types 
  were no longer recognized, causing errors.
  
  
  ----------------------------------------
  15 May 2015. Summary of changes for version 20150515:
  
  This release implements most of ACPI 6.0 as described below.
  
  1) ACPICA kernel-resident subsystem:
  
  Implemented runtime argument checking and return value checking for all 
  new ACPI 6.0 predefined names. This includes: _BTH, _CR3, _DSD, _LPI, 
  _MTL, _PRR, _RDI, _RST, _TFP, _TSN.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Current Release:
      Non-Debug Version:  99.9K Code, 27.5K Data, 127.4K Total
      Debug Version:     195.2K Code, 80.8K Data, 276.0K Total
    Previous Release:
      Non-Debug Version:  99.1K Code, 27.3K Data, 126.4K Total
      Debug Version:     192.8K Code, 79.9K Data, 272.7K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL compiler: Added compile-time support for all new ACPI 6.0 predefined 
  names (argument count validation and return value typechecking.)
  
  iASL disassembler and table compiler: implemented support for all new 
  ACPI 6.0 tables. This includes: DRTM, IORT, LPIT, NFIT, STAO, WPBT, XENV. 
  
  iASL disassembler and table compiler: Added ACPI 6.0 changes to existing 
  tables: FADT, MADT.
  
  iASL preprocessor: Added a new directive to enable inclusion of binary 
  blobs into ASL code. The new directive is #includebuffer. It takes a 
  binary file as input and emits a named ascii buffer object into the ASL 
  code.
  
  AcpiHelp: Added support for all new ACPI 6.0 predefined names.
  
  AcpiHelp: Added a new option, -d, to display all iASL preprocessor 
  directives.
  
  AcpiHelp: Added a new option, -t, to display all known/supported ACPI 
  tables.
  
  
  ----------------------------------------
  10 April 2015. Summary of changes for version 20150410:
  
  Reverted a change introduced in version 20150408 that caused
  a regression in the disassembler where incorrect operator
  symbols could be emitted.
  
  
  ----------------------------------------
  08 April 2015. Summary of changes for version 20150408:
  
  
  1) ACPICA kernel-resident subsystem:
  
  Permanently set the return value for the _REV predefined name. It now 
  returns 2 (was 5). This matches other ACPI implementations. _REV will be 
  deprecated in the future, and is now defined to be 1 for ACPI 1.0, and 2 
  for ACPI 2.0 and later. It should never be used to differentiate or 
  identify operating systems.
  
  Added the "Windows 2015" string to the _OSI support. ACPICA will now 
  return TRUE to a query with this string.
  
  Fixed several issues with the local version of the printf function.
  
  Added the C99 compiler option (-std=c99) to the Unix makefiles.
  
    Current Release:
      Non-Debug Version:  99.9K Code, 27.4K Data, 127.3K Total
      Debug Version:     195.2K Code, 80.7K Data, 275.9K Total
    Previous Release:
      Non-Debug Version:  98.8K Code, 27.3K Data, 126.1K Total
      Debug Version:     192.1K Code, 79.8K Data, 271.9K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Implemented an enhancement to the constant folding feature to 
  transform the parse tree to a simple Store operation whenever possible:
      Add (2, 3, X) ==> is converted to: Store (5, X)
      X = 2 + 3     ==> is converted to: Store (5, X)
  
  Updated support for the SLIC table (Software Licensing Description Table) 
  in both the Data Table compiler and the disassembler. The SLIC table 
  support now conforms to "Microsoft Software Licensing Tables (SLIC and 
  MSDM). November 29, 2011. Copyright 2011 Microsoft". Note: Any SLIC data 
  following the ACPI header is now defined to be "Proprietary Data", and as 
  such, can only be entered or displayed as a hex data block.
  
  Implemented full support for the MSDM table as described in the document 
  above. Note: The format of MSDM is similar to SLIC. Any MSDM data 
  following the ACPI header is defined to be "Proprietary Data", and can 
  only be entered or displayed as a hex data block.
  
  Implemented the -Pn option for the iASL Table Compiler (was only 
  implemented for the ASL compiler). This option disables the iASL 
  preprocessor.
  
  Disassembler: For disassembly of Data Tables, added a comment field 
  around the Ascii equivalent data that is emitted as part of the "Raw 
  Table Data" block. This prevents the iASL Preprocessor from possible 
  confusion if/when the table is compiled.
  
  Disassembler: Added an option (-df) to force the disassembler to assume 
  that the table being disassembled contains valid AML. This feature is 
  useful for disassembling AML files that contain ACPI signatures other 
  than DSDT or SSDT (such as OEMx or other signatures).
  
  Changes for the EFI version of the tools:
  1) Fixed a build error/issue
  2) Fixed a cast warning
  
  iASL: Fixed a path issue with the __FILE__ operator by making the 
  directory prefix optional within the internal SplitInputFilename 
  function.
  
  Debugger: Removed some unused global variables.
  
  Tests: Updated the makefile for proper generation of the AAPITS suite.
  
  
  ----------------------------------------
  04 February 2015. Summary of changes for version 20150204:
  
  ACPICA kernel-resident subsystem:
  
  Updated all ACPICA copyrights and signons to 2014. Added the 2014 
  copyright to all module headers and signons, including the standard Linux 
  header. This affects virtually every file in the ACPICA core subsystem, 
  iASL compiler, all ACPICA utilities, and the test suites.
  
  Events: Introduce ACPI_GPE_DISPATCH_RAW_HANDLER to fix GPE storm issues.
  A raw gpe handling mechanism was created to allow better handling of GPE
  storms that aren't easily managed by the normal handler. The raw handler
  allows disabling/renabling of the GPE so that interrupt storms can be
  avoided in cases where events cannot be timely serviced. In this 
  scenario, handlers should use the AcpiSetGpe() API to disable/enable the 
  GPE. This API will leave the reference counts undisturbed, thereby 
  preventing unintentional clearing of the GPE when the intent in only to 
  temporarily disable it. Raw handlers allow enabling and disabling of a 
  GPE by removing GPE register locking. As such, raw handlers much provide 
  their own locks while using GPE API's to protect access to GPE data 
  structures.
  Lv Zheng
  
  Events: Always modify GPE registers under the GPE lock.
  Applies GPE lock around AcpiFinishGpe() to protect access to GPE register
  values. Reported as bug by joe.liu@apple.com.
  
  Unix makefiles: Separate option to disable optimizations and 
  _FORTIFY_SOURCE. This change removes the _FORTIFY_SOURCE flag from the 
  NOOPT disable option and creates a separate flag (NOFORTIFY) for this 
  purpose. Some toolchains may define _FORTIFY_SOURCE which leads redefined 
  errors when building ACPICA. This allows disabling the option without 
  also having to disable optimazations.
  David Box
  
    Current Release:
      Non-Debug Version: 101.7K Code, 27.9K Data, 129.6K Total
      Debug Version:     199.2K Code, 82.4K Data, 281.6K Total
  
  --
  --------------------------------------
  07 November 2014. Summary of changes for version 20141107:
  
  This release is available at https://acpica.org/downloads
  
  This release introduces and implements language extensions to ASL that 
  provide support for symbolic ("C-style") operators and expressions. These 
  language extensions are known collectively as ASL+.
  
  
  1) iASL Compiler/Disassembler and Tools:
  
  Disassembler: Fixed a problem with disassembly of the UartSerialBus 
  macro. Changed "StopBitsNone" to the correct "StopBitsZero". David E. 
  Box.
  
  Disassembler: Fixed the Unicode macro support to add escape sequences. 
  All non-printable ASCII values are emitted as escape sequences, as well 
  as the standard escapes for quote and backslash. Ensures that the 
  disassembled macro can be correctly recompiled.
  
  iASL: Added Printf/Fprintf macros for formatted output. These macros are 
  translated to existing AML Concatenate and Store operations. Printf 
  writes to the ASL Debug object. Fprintf allows the specification of an 
  ASL name as the target. Only a single format specifier is required, %o, 
  since the AML interpreter dynamically converts objects to the required 
  type. David E. Box.
  
      (old)    Store (Concatenate (Concatenate (Concatenate (Concatenate
                   (Concatenate (Concatenate (Concatenate ("", Arg0),
                   ": Unexpected value for "), Arg1), ", "), Arg2),
                   " at line "), Arg3), Debug)
  
      (new)    Printf ("%o: Unexpected value for %o, %o at line %o",
                   Arg0, Arg1, Arg2, Arg3)
  
      (old)    Store (Concatenate (Concatenate (Concatenate (Concatenate
                   ("", Arg1), ": "), Arg0), " Successful"), STR1)
  
      (new)    Fprintf (STR1, "%o: %o Successful", Arg1, Arg0)
  
  iASL: Added debug options (-bp, -bt) to dynamically prune levels of the 
  ASL parse tree before the AML code is generated. This allows blocks of 
  ASL code to be removed in order to help locate and identify problem 
  devices and/or code. David E. Box.
  
  AcpiExec: Added support (-fi) for an optional namespace object 
  initialization file. This file specifies initial values for namespace 
  objects as necessary for debugging and testing different ASL code paths 
  that may be taken as a result of BIOS options.
  
  
  2) Overview of symbolic operator support for ASL (ASL+)
  -------------------------------------------------------
  
  As an extension to the ASL language, iASL implements support for symbolic 
  (C-style) operators for math and logical expressions. This can greatly 
  simplify ASL code as well as improve both readability and 
  maintainability. These language extensions can exist concurrently with 
  all legacy ASL code and expressions.
  
  The symbolic extensions are 100% compatible with existing AML 
  interpreters, since no new AML opcodes are created. To implement the 
  extensions, the iASL compiler transforms the symbolic expressions into 
  the legacy ASL/AML equivalents at compile time.
  
  Full symbolic expressions are supported, along with the standard C 
  precedence and associativity rules.
  
  Full disassembler support for the symbolic expressions is provided, and 
  creates an automatic migration path for existing ASL code to ASL+ code 
  via the disassembly process. By default, the disassembler now emits ASL+ 
  code with symbolic expressions. An option (-dl) is provided to force the 
  disassembler to emit legacy ASL code if desired.
  
  Below is the complete list of the currently supported symbolic operators 
  with examples. See the iASL User Guide for additional information.
  
  
  ASL+ Syntax      Legacy ASL Equivalent
  -----------      ---------------------
  
      // Math operators
  
  Z = X + Y        Add (X, Y, Z)
  Z = X - Y        Subtract (X, Y, Z)
  Z = X * Y        Multiply (X, Y, Z)
  Z = X / Y        Divide (X, Y, , Z)
  Z = X % Y        Mod (X, Y, Z)
  Z = X << Y       ShiftLeft (X, Y, Z)
  Z = X >> Y       ShiftRight (X, Y, Z)
  Z = X & Y        And (X, Y, Z)
  Z = X | Y        Or (X, Y, Z)
  Z = X ^ Y        Xor (X, Y, Z)
  Z = ~X           Not (X, Z)
  X++              Increment (X)
  X--              Decrement (X)
  
      // Logical operators
  
  (X == Y)         LEqual (X, Y)
  (X != Y)         LNotEqual (X, Y)
  (X < Y)          LLess (X, Y)
  (X > Y)          LGreater (X, Y)
  (X <= Y)         LLessEqual (X, Y)
  (X >= Y)         LGreaterEqual (X, Y)
  (X && Y)         LAnd (X, Y)
  (X || Y)         LOr (X, Y)
  (!X)             LNot (X)
  
      // Assignment and compound assignment operations
  
  X = Y           Store (Y, X)
  X += Y          Add (X, Y, X)
  X -= Y          Subtract (X, Y, X)
  X *= Y          Multiply (X, Y, X)
  X /= Y          Divide (X, Y, , X)
  X %= Y          Mod (X, Y, X)
  X <<= Y         ShiftLeft (X, Y, X)
  X >>= Y         ShiftRight (X, Y, X)
  X &= Y          And (X, Y, X)
  X |= Y          Or (X, Y, X)
  X ^= Y          Xor (X, Y, X)
  
  
  3) ASL+ Examples:
  -----------------
  
  Legacy ASL:
          If (LOr (LOr (LEqual (And (R510, 0x03FB), 0x02E0), LEqual (
              And (R520, 0x03FB), 0x02E0)), LOr (LEqual (And (R530, 
  0x03FB), 
              0x02E0), LEqual (And (R540, 0x03FB), 0x02E0))))
          {
              And (MEMB, 0xFFFFFFF0, SRMB)
              Store (MEMB, Local2)
              Store (PDBM, Local1)
              And (PDBM, 0xFFFFFFFFFFFFFFF9, PDBM)
              Store (SRMB, MEMB)
              Or (PDBM, 0x02, PDBM)
          }
  
  ASL+ version:
          If (((R510 & 0x03FB) == 0x02E0) ||
              ((R520 & 0x03FB) == 0x02E0) ||
              ((R530 & 0x03FB) == 0x02E0) || 
              ((R540 & 0x03FB) == 0x02E0))
          {
              SRMB = (MEMB & 0xFFFFFFF0)
              Local2 = MEMB
              Local1 = PDBM
              PDBM &= 0xFFFFFFFFFFFFFFF9
              MEMB = SRMB
              PDBM |= 0x02
          }
  
  Legacy ASL:
          Store (0x1234, Local1)
          Multiply (Add (Add (Local1, TEST), 0x20), Local2, Local3)
          Multiply (Local2, Add (Add (Local1, TEST), 0x20), Local3)
          Add (Local1, Add (TEST, Multiply (0x20, Local2)), Local3)
          Store (Index (PKG1, 0x03), Local6)
          Store (Add (Local3, Local2), Debug)
          Add (Local1, 0x0F, Local2)
          Add (Local1, Multiply (Local2, Local3), Local2)
          Multiply (Add (Add (Local1, TEST), 0x20), ToBCD (Local1), Local3)
  
  ASL+ version:
          Local1 = 0x1234
          Local3 = (((Local1 + TEST) + 0x20) * Local2)
          Local3 = (Local2 * ((Local1 + TEST) + 0x20))
          Local3 = (Local1 + (TEST + (0x20 * Local2)))
          Local6 = Index (PKG1, 0x03)
          Debug = (Local3 + Local2)
          Local2 = (Local1 + 0x0F)
          Local2 = (Local1 + (Local2 * Local3))
          Local3 = (((Local1 + TEST) + 0x20) * ToBCD (Local1))
  
  
  ----------------------------------------
  26 September 2014. Summary of changes for version 20140926:
  
  1) ACPICA kernel-resident subsystem:
  
  Updated the GPIO operation region handler interface (GeneralPurposeIo). 
  In order to support GPIO Connection objects with multiple pins, along 
  with the related Field objects, the following changes to the interface 
  have been made: The Address is now defined to be the offset in bits of 
  the field unit from the previous invocation of a Connection. It can be 
  viewed as a "Pin Number Index" into the connection resource descriptor. 
  The BitWidth is the exact bit width of the field. It is usually one bit, 
  but not always. See the ACPICA reference guide (section 8.8.6.2.1) for 
  additional information and examples.
  
  GPE support: During ACPICA/GPE initialization, ensure that all GPEs with 
  corresponding _Lxx/_Exx methods are disabled (they may have been enabled 
  by the firmware), so that they cannot fire until they are enabled via 
  AcpiUpdateAllGpes. Rafael J. Wysocki.
  
  Added a new return flag for the Event/GPE status interfaces -- 
  AcpiGetEventStatus and AcpiGetGpeStatus. The new 
  ACPI_EVENT_FLAGS_HAS_HANDLER flag is used to indicate that the event or 
  GPE currently has a handler associated with it, and can thus actually 
  affect the system. Lv Zheng.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Current Release:
      Non-Debug Version:  99.1K Code, 27.3K Data, 126.4K Total
      Debug Version:     192.8K Code, 79.9K Data, 272.7K Total
    Previous Release:
      Non-Debug Version:  98.8K Code, 27.3K Data, 126.1K Total
      Debug Version:     192.1K Code, 79.8K Data, 271.9K Total
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Fixed a memory allocation/free regression introduced in 20140828 
  that could cause the compiler to crash. This was introduced inadvertently 
  during the effort to eliminate compiler memory leaks. ACPICA BZ 1111, 
  1113.
  
  iASL: Removed two error messages that have been found to create false 
  positives, until they can be fixed and fully validated (ACPICA BZ 1112):
  1) Illegal forward reference within a method
  2) Illegal reference across two methods
  
  iASL: Implemented a new option (-lm) to create a hardware mapping file 
  that summarizes all GPIO, I2C, SPI, and UART connections. This option 
  works for both the compiler and disassembler. See the iASL compiler user 
  guide for additional information and examples (section 6.4.6).
  
  AcpiDump: Added support for the version 1 (ACPI 1.0) RSDP in addition to 
  version 2. This corrects the AE_BAD_HEADER exception seen on systems with 
  a version 1 RSDP. Lv Zheng ACPICA BZ 1097.
  
  AcpiExec: For Unix versions, don't attempt to put STDIN into raw mode 
  unless STDIN is actually a terminal. Assists with batch-mode processing. 
  ACPICA BZ 1114.
  
  Disassembler/AcpiHelp: Added another large group of recognized _HID 
  values.
  
  
  ----------------------------------------
  28 August 2014. Summary of changes for version 20140828:
  
  1) ACPICA kernel-resident subsystem:
  
  Fixed a problem related to the internal use of the Timer() operator where 
  a 64-bit divide could cause an attempted link to a double-precision math 
  library. This divide is not actually necessary, so the code was 
  restructured to eliminate it. Lv Zheng.
  
  ACPI 5.1: Added support for the runtime validation of the _DSD package 
  (similar to the iASL support).
  
  ACPI 5.1/Headers: Added support for the GICC affinity subtable to the 
  SRAT table. Hanjun Guo <hanjun.guo@linaro.org>.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Current Release:
      Non-Debug Version:  98.8K Code, 27.3K Data, 126.1K Total
      Debug Version:     192.1K Code, 79.8K Data, 271.9K Total
    Previous Release:
      Non-Debug Version:  98.7K Code, 27.3K Data, 126.0K Total1
      Debug Version:     192.0K Code, 79.7K Data, 271.7K Total
  
  2) iASL Compiler/Disassembler and Tools:
  
  AcpiExec: Fixed a problem on unix systems where the original terminal 
  state was not always properly restored upon exit. Seen when using the -v 
  option. ACPICA BZ 1104.
  
  iASL: Fixed a problem with the validation of the ranges/length within the 
  Memory24 resource descriptor. There was a boundary condition when the 
  range was equal to the (length -1) caused by the fact that these values 
  are defined in 256-byte blocks, not bytes. ACPICA BZ 1098
  
  Disassembler: Fixed a problem with the GpioInt descriptor interrupt 
  polarity 
  flags. The flags are actually 2 bits, not 1, and the "ActiveBoth" keyword 
  is 
  now supported properly.
  
  ACPI 5.1: Added the GICC affinity subtable to the SRAT table. Supported 
  in the disassembler, data table compiler, and table template generator.
  
  iASL: Added a requirement for Device() objects that one of either a _HID 
  or _ADR must exist within the scope of a Device, as per the ACPI 
  specification. Remove a similar requirement that was incorrectly in place 
  for the _DSD object.
  
  iASL: Added error detection for illegal named references within control 
  methods that would cause runtime failures. Now trapped as errors are: 1) 
  References to objects within a non-parent control method. 2) Forward 
  references (within a method) -- for control methods, AML interpreters use 
  a one-pass parse of control methods. ACPICA BZ 1008.
  
  iASL: Added error checking for dependencies related to the _PSx power 
  methods. ACPICA BZ 1029.
  1) For _PS0, one of these must exist within the same scope: _PS1, _PS2, 
  _PS3.
  2) For _PS1, _PS2, and PS3: A _PS0 object must exist within the same 
  scope.
  
  iASL and table compiler: Cleanup miscellaneous memory leaks by fully 
  deploying the existing object and string caches and adding new caches for 
  the table compiler.
  
  iASL: Split the huge parser source file into multiple subfiles to improve 
  manageability. Generation now requires the M4 macro preprocessor, which 
  is part of the Bison distribution on both unix and windows platforms.
  
  AcpiSrc: Fixed and removed all extraneous warnings generated during 
  entire ACPICA source code scan and/or conversion.
  
  
  ----------------------------------------
  
  24 July 2014. Summary of changes for version 20140724: 
  
  The ACPI 5.1 specification has been released and is available at: 
  http://uefi.org/specs/access
  
  
  0) ACPI 5.1 support in ACPICA:
  
  ACPI 5.1 is fully supported in ACPICA as of this release.
  
  New predefined names. Support includes iASL and runtime ACPICA 
  validation.
      _CCA (Cache Coherency Attribute).
      _DSD (Device-Specific Data). David Box.
  
  Modifications to existing ACPI tables. Support includes headers, iASL 
  Data Table compiler, disassembler, and the template generator.
      FADT - New fields and flags. Graeme Gregory.
      GTDT - One new subtable and new fields. Tomasz Nowicki.
      MADT - Two new subtables. Tomasz Nowicki.
      PCCT - One new subtable.
  
  Miscellaneous.
      New notification type for System Resource Affinity change events.
  
  
  1) ACPICA kernel-resident subsystem:
  
  Fixed a regression introduced in 20140627 where a fault can happen during 
  the deletion of Alias AML namespace objects. The problem affected both 
  the core ACPICA and the ACPICA tools including iASL and AcpiExec.
  
  Implemented a new GPE public interface, AcpiMarkGpeForWake. Provides a 
  simple mechanism to enable wake GPEs that have no associated handler or 
  control method. Rafael Wysocki.
  
  Updated the AcpiEnableGpe interface to disallow the enable if there is no 
  handler or control method associated with the particular GPE. This will 
  help avoid meaningless GPEs and even GPE floods. Rafael Wysocki.
  
  Updated GPE handling and dispatch by disabling the GPE before clearing 
  the status bit for edge-triggered GPEs. Lv Zheng.
  
  Added Timer() support to the AML Debug object. The current timer value is 
  now displayed with each invocation of (Store to) the debug object to 
  enable simple generation of execution times for AML code (method 
  execution for example.) ACPICA BZ 1093.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Current Release:
      Non-Debug Version:  98.7K Code, 27.3K Data, 126.0K Total
      Debug Version:     192.0K Code, 79.7K Data, 271.7K Total
    Previous Release:
      Non-Debug Version:  98.7K Code, 27.2K Data, 125.9K Total
      Debug Version:     191.7K Code, 79.6K Data, 271.3K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  Fixed an issue with the recently added local printf implementation, 
  concerning width/precision specifiers that could cause incorrect output. 
  Lv Zheng. ACPICA BZ 1094.
  
  Disassembler: Added support to detect buffers that contain UUIDs and 
  disassemble them to an invocation of the ToUUID operator. Also emit 
  commented descriptions of known ACPI-related UUIDs.
  
  AcpiHelp: Added support to display known ACPI-related UUIDs. New option, 
  -u. Adds three new files. 
  
  iASL: Update table compiler and disassembler for DMAR table changes that 
  were introduced in September 2013. With assistance by David Woodhouse.
  
  ----------------------------------------
  27 June 2014. Summary of changes for version 20140627:
  
  1) ACPICA kernel-resident subsystem:
  
  Formatted Output: Implemented local versions of standard formatted output 
  utilities such as printf, etc. Over time, it has been discovered that 
  there are in fact many portability issues with printf, and the addition 
  of this feature will fix/prevent these issues once and for all. Some 
  known issues are summarized below:
  
  1) Output of 64-bit values is not portable. For example, UINT64 is %ull 
  for the Linux kernel and is %uI64 for some MSVC versions.
  2) Invoking printf consistently in a manner that is portable across both 
  32-bit and 64-bit platforms is difficult at best in many situations.
  3) The output format for pointers varies from system to system (leading 
  zeros especially), and leads to inconsistent output from ACPICA across 
  platforms.
  4) Certain platform-specific printf formats may conflict with ACPICA use.
  5) If there is no local C library available, ACPICA now has local support 
  for printf.
  
  -- To address these printf issues in a complete manner, ACPICA now 
  directly implements a small subset of printf format specifiers, only 
  those that it requires. Adds a new file, utilities/utprint.c. Lv Zheng.
  
  Implemented support for ACPICA generation within the EFI environment. 
  Initially, the AcpiDump utility is supported in the UEFI shell 
  environment. Lv Zheng.
  
  Added a new external interface, AcpiLogError, to improve ACPICA 
  portability. This allows the host to redirect error messages from the 
  ACPICA utilities. Lv Zheng.
  
  Added and deployed new OSL file I/O interfaces to improve ACPICA 
  portability:
    AcpiOsOpenFile
    AcpiOsCloseFile
    AcpiOsReadFile
    AcpiOsWriteFile
    AcpiOsGetFileOffset
    AcpiOsSetFileOffset
  There are C library implementations of these functions in the new file 
  service_layers/oslibcfs.c -- however, the functions can be implemented by 
  the local host in any way necessary. Lv Zheng.
  
  Implemented a mechanism to disable/enable ACPI table checksum validation 
  at runtime. This can be useful when loading tables very early during OS 
  initialization when it may not be possible to map the entire table in 
  order to compute the checksum. Lv Zheng.
  
  Fixed a buffer allocation issue for the Generic Serial Bus support. 
  Originally, a fixed buffer length was used. This change allows for 
  variable-length buffers based upon the protocol indicated by the field 
  access attributes. Reported by Lan Tianyu. Lv Zheng.
  
  Fixed a problem where an object detached from a namespace node was not 
  properly terminated/cleared and could cause a circular list problem if 
  reattached. ACPICA BZ 1063. David Box.
  
  Fixed a possible recursive lock acquisition in hwregs.c. Rakib Mullick.
  
  Fixed a possible memory leak in an error return path within the function 
  AcpiUtCopyIobjectToIobject. ACPICA BZ 1087. Colin Ian King.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Current Release:
      Non-Debug Version:  98.7K Code, 27.2K Data, 125.9K Total
      Debug Version:     191.7K Code, 79.6K Data, 271.3K Total
    Previous Release:
      Non-Debug Version:  96.8K Code, 27.2K Data, 124.0K Total
      Debug Version:     189.5K Code, 79.7K Data, 269.2K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  Disassembler: Add dump of ASCII equivalent text within a comment at the 
  end of each line of the output for the Buffer() ASL operator.
  
  AcpiDump: Miscellaneous changes:
    Fixed repetitive table dump in -n mode.
    For older EFI platforms, use the ACPI 1.0 GUID during RSDP search if 
  the ACPI 2.0 GUID fails.
  
  iASL: Fixed a problem where the compiler could fault if incorrectly given 
  an acpidump output file as input. ACPICA BZ 1088. David Box.
  
  AcpiExec/AcpiNames: Fixed a problem where these utilities could fault if 
  they are invoked without any arguments.
  
  Debugger: Fixed a possible memory leak in an error return path. ACPICA BZ 
  1086. Colin Ian King.
  
  Disassembler: Cleaned up a block of code that extracts a parent Op 
  object. Added a comment that explains that the parent is guaranteed to be 
  valid in this case. ACPICA BZ 1069.
  
  
  ----------------------------------------
  24 April 2014. Summary of changes for version 20140424:
  
  1) ACPICA kernel-resident subsystem:
  
  Implemented support to skip/ignore NULL address entries in the RSDT/XSDT. 
  Some of these tables are known to contain a trailing NULL entry. Lv 
  Zheng.
  
  Removed an extraneous error message for the case where there are a large 
  number of system GPEs (> 124). This was the "32-bit FADT register is too 
  long to convert to GAS struct" message, which is irrelevant for GPEs 
  since the GPEx_BLK_LEN fields of the FADT are always used instead of the 
  (limited capacity) GAS bit length. Also, several changes to ensure proper 
  support for GPE numbers > 255, where some "GPE number" fields were 8-bits 
  internally.
  
  Implemented and deployed additional configuration support for the public 
  ACPICA external interfaces. Entire classes of interfaces can now be 
  easily modified or configured out, replaced by stubbed inline functions 
  by default. Lv Zheng.
  
  Moved all public ACPICA runtime configuration globals to the public 
  ACPICA external interface file for convenience. Also, removed some 
  obsolete/unused globals. See the file acpixf.h. Lv Zheng.
  
  Documentation: Added a new section to the ACPICA reference describing the 
  maximum number of GPEs that can be supported by the FADT-defined GPEs in 
  block zero and one. About 1200 total. See section 4.4.1 of the ACPICA 
  reference.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Current Release:
      Non-Debug Version:  96.8K Code, 27.2K Data, 124.0K Total
      Debug Version:     189.5K Code, 79.7K Data, 269.2K Total
    Previous Release:
      Non-Debug Version:  97.0K Code, 27.2K Data, 124.2K Total
      Debug Version:     189.7K Code, 79.5K Data, 269.2K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL and disassembler: Add full support for the LPIT table (Low Power 
  Idle Table). Includes support in the disassembler, data table compiler, 
  and template generator.
  
  AcpiDump utility:
  1) Add option to force the use of the RSDT (over the XSDT).
  2) Improve validation of the RSDP signature (use 8 chars instead of 4).
  
  iASL: Add check for predefined packages that are too large.  For 
  predefined names that contain subpackages, check if each subpackage is 
  too large. (Check for too small already exists.)
  
  Debugger: Updated the GPE command (which simulates a GPE by executing the 
  GPE code paths in ACPICA). The GPE device is now optional, and defaults 
  to the GPE 0/1 FADT-defined blocks.
  
  Unix application OSL: Update line-editing support. Add additional error 
  checking and take care not to reset terminal attributes on exit if they 
  were never set. This should help guarantee that the terminal is always 
  left in the previous state on program exit.
  
  
  ----------------------------------------
  25 March 2014. Summary of changes for version 20140325:
  
  1) ACPICA kernel-resident subsystem:
  
  Updated the auto-serialize feature for control methods. This feature 
  automatically serializes all methods that create named objects in order 
  to prevent runtime errors. The update adds support to ignore the 
  currently executing AML SyncLevel when invoking such a method, in order 
  to prevent disruption of any existing SyncLevel priorities that may exist 
  in the AML code. Although the use of SyncLevels is relatively rare, this 
  change fixes a regression where an AE_AML_MUTEX_ORDER exception can 
  appear on some machines starting with the 20140214 release.
  
  Added a new external interface to allow the host to install ACPI tables 
  very early, before the namespace is even created. AcpiInstallTable gives 
  the host additional flexibility for ACPI table management. Tables can be 
  installed directly by the host as if they had originally appeared in the 
  XSDT/RSDT. Installed tables can be SSDTs or other ACPI data tables 
  (anything except the DSDT and FACS). Adds a new file, tbdata.c, along 
  with additional internal restructuring and cleanup. See the ACPICA 
  Reference for interface details. Lv Zheng.
  
  Added validation of the checksum for all incoming dynamically loaded 
  tables (via external interfaces or via AML Load/LoadTable operators). Lv 
  Zheng.
  
  Updated the use of the AcpiOsWaitEventsComplete interface during Notify 
  and GPE handler removal. Restructured calls to eliminate possible race 
  conditions. Lv Zheng.
  
  Added a warning for the use/execution of the ASL/AML Unload (table) 
  operator. This will help detect and identify machines that use this 
  operator if and when it is ever used. This operator has never been seen 
  in the field and the usage model and possible side-effects of the drastic 
  runtime action of a full table removal are unknown.
  
  Reverted the use of #pragma push/pop which was introduced in the 20140214 
  release. It appears that push and pop are not implemented by enough 
  compilers to make the use of this feature feasible for ACPICA at this 
  time. However, these operators may be deployed in a future ACPICA 
  release.
  
  Added the missing EXPORT_SYMBOL macros for the install and remove SCI 
  handler interfaces.
  
  Source code generation:
  1) Disabled the use of the "strchr" macro for the gcc-specific 
  generation. For some versions of gcc, this macro can periodically expose 
  a compiler bug which in turn causes compile-time error(s).
  2) Added support for PPC64 compilation. Colin Ian King.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Current Release:
      Non-Debug Version:  97.0K Code, 27.2K Data, 124.2K Total
      Debug Version:     189.7K Code, 79.5K Data, 269.2K Total
    Previous Release:
      Non-Debug Version:  96.5K Code, 27.2K Data, 123.7K Total
      Debug Version:     188.6K Code, 79.0K Data, 267.6K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  Disassembler: Added several new features to improve the readability of 
  the resulting ASL code. Extra information is emitted within comment 
  fields in the ASL code:
  1) Known _HID/_CID values are decoded to descriptive text.
  2) Standard values for the Notify() operator are decoded to descriptive 
  text.
  3) Target operands are expanded to full pathnames (in a comment) when 
  possible.
  
  Disassembler: Miscellaneous updates for extern() handling:
  1) Abort compiler if file specified by -fe option does not exist.
  2) Silence unnecessary warnings about argument count mismatches.
  3) Update warning messages concerning unresolved method externals.
  4) Emit "UnknownObj" keyword for externals whose type cannot be 
  determined.
  
  AcpiHelp utility:
  1) Added the -a option to display both the ASL syntax and the AML 
  encoding for an input ASL operator. This effectively displays all known 
  information about an ASL operator with one AcpiHelp invocation.
  2) Added substring match support (similar to a wildcard) for the -i 
  (_HID/PNP IDs) option.
  
  iASL/Disassembler: Since this tool does not yet support execution on big-
  endian machines, added detection of endianness and an error message if 
  execution is attempted on big-endian. Support for big-endian within iASL 
  is a feature that is on the ACPICA to-be-done list.
  
  AcpiBin utility:
  1) Remove option to extract binary files from an acpidump; this function 
  is made obsolete by the AcpiXtract utility.
  2) General cleanup of open files and allocated buffers.
  
  
  ----------------------------------------
  14 February 2014. Summary of changes for version 20140214:
  
  1) ACPICA kernel-resident subsystem:
  
  Implemented a new mechanism to proactively prevent problems with ill-
  behaved reentrant control methods that create named ACPI objects. This 
  behavior is illegal as per the ACPI specification, but is nonetheless 
  frequently seen in the field. Previously, this could lead to an 
  AE_ALREADY_EXISTS exception if the method was actually entered by more 
  than one thread. This new mechanism detects such methods at table load 
  time and marks them "serialized" to prevent reentrancy. A new global 
  option, AcpiGbl_AutoSerializeMethods, has been added to disable this 
  feature if desired. This mechanism and global option obsoletes and 
  supersedes the previous AcpiGbl_SerializeAllMethods option.
  
  Added the "Windows 2013" string to the _OSI support. ACPICA will now 
  respond TRUE to _OSI queries with this string. It is the stated policy of 
  ACPICA to add new strings to the _OSI support as soon as possible after 
  they are defined. See the full ACPICA _OSI policy which has been added to 
  the utilities/utosi.c file.
  
  Hardened/updated the _PRT return value auto-repair code:
  1) Do not abort the repair on a single subpackage failure, continue to 
  check all subpackages.
  2) Add check for the minimum subpackage length (4).
  3) Properly handle extraneous NULL package elements.
  
  Added support to avoid the possibility of infinite loops when traversing 
  object linked lists. Never allow an infinite loop, even in the face of 
  corrupted object lists.
  
  ACPICA headers: Deployed the use of #pragma pack(push) and #pragma 
  pack(pop) directives to ensure that the ACPICA headers are independent of 
  compiler settings or other host headers.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Current Release:
      Non-Debug Version:  96.5K Code, 27.2K Data, 123.7K Total
      Debug Version:     188.6K Code, 79.0K Data, 267.6K Total
    Previous Release:
      Non-Debug Version:  96.2K Code, 27.0K Data, 123.2K Total
      Debug Version:     187.5K Code, 78.3K Data, 265.8K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL/Table-compiler: Fixed a problem with support for the SPMI table. The 
  first reserved field was incorrectly forced to have a value of zero. This 
  change correctly forces the field to have a value of one. ACPICA BZ 1081.
  
  Debugger: Added missing support for the "Extra" and "Data" subobjects 
  when displaying object data.
  
  Debugger: Added support to display entire object linked lists when 
  displaying object data.
  
  iASL: Removed the obsolete -g option to obtain ACPI tables from the 
  Windows registry. This feature has been superseded by the acpidump 
  utility. 
  
  
  ----------------------------------------
  14 January 2014. Summary of changes for version 20140114:
  
  1) ACPICA kernel-resident subsystem:
  
  Updated all ACPICA copyrights and signons to 2014. Added the 2014 
  copyright to all module headers and signons, including the standard Linux 
  header. This affects virtually every file in the ACPICA core subsystem, 
  iASL compiler, all ACPICA utilities, and the test suites.
  
  Improved parameter validation for AcpiInstallGpeBlock. Added the 
  following checks:
  1) The incoming device handle refers to type ACPI_TYPE_DEVICE.
  2) There is not already a GPE block attached to the device.
  Likewise, with AcpiRemoveGpeBlock, ensure that the incoming object is a 
  device.
  
  Correctly support "references" in the ACPI_OBJECT. This change fixes the 
  support to allow references (namespace nodes) to be passed as arguments 
  to control methods via the evaluate object interface. This is probably 
  most useful for testing purposes, however.
  
  Improved support for 32/64 bit physical addresses in printf()-like 
  output. This change improves the support for physical addresses in printf 
  debug statements and other output on both 32-bit and 64-bit hosts. It 
  consistently outputs the appropriate number of bytes for each host. The 
  %p specifier is unsatisfactory since it does not emit uniform output on 
  all hosts/clib implementations (on some, leading zeros are not supported, 
  leading to difficult-to-read output).
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Current Release:
      Non-Debug Version:  96.2K Code, 27.0K Data, 123.2K Total
      Debug Version:     187.5K Code, 78.3K Data, 265.8K Total
    Previous Release:
      Non-Debug Version:  96.1K Code, 27.0K Data, 123.1K Total
      Debug Version:     185.6K Code, 77.3K Data, 262.9K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Fix a possible fault when using the Connection() operator. Fixes a 
  problem if the parent Field definition for the Connection operator refers 
  to an operation region that does not exist. ACPICA BZ 1064.
  
  AcpiExec: Load of local test tables is now optional. The utility has the 
  capability to load some various tables to test features of ACPICA. 
  However, there are enough of them that the output of the utility became 
  confusing. With this change, only the required local tables are displayed 
  (RSDP, XSDT, etc.) along with the actual tables loaded via the command 
  line specification. This makes the default output simler and easier to 
  understand. The -el command line option restores the original behavior 
  for testing purposes.
  
  AcpiExec: Added support for overlapping operation regions. This change 
  expands the simulation of operation regions by supporting regions that 
  overlap within the given address space. Supports SystemMemory and 
  SystemIO. ASLTS test suite updated also. David Box. ACPICA BZ 1031.
  
  AcpiExec: Added region handler support for PCI_Config and EC spaces. This 
  allows AcpiExec to simulate these address spaces, similar to the current 
  support for SystemMemory and SystemIO.
  
  Debugger: Added new command to read/write/compare all namespace objects. 
  The command "test objects" will exercise the entire namespace by writing 
  new values to each data object, and ensuring that the write was 
  successful. The original value is then restored and verified.
  
  Debugger: Added the "test predefined" command. This change makes this 
  test public and puts it under the new "test" command. The test executes 
  each and every predefined name within the current namespace.
  
  
  ----------------------------------------
  18 December 2013. Summary of changes for version 20131218:
  
  Global note: The ACPI 5.0A specification was released this month. There 
  are no changes needed for ACPICA since this release of ACPI is an 
  errata/clarification release. The specification is available at 
  acpi.info. 
  
  
  1) ACPICA kernel-resident subsystem:
  
  Added validation of the XSDT root table if it is present. Some older 
  platforms contain an XSDT that is ill-formed or otherwise invalid (such 
  as containing some or all entries that are NULL pointers). This change 
  adds a new function to validate the XSDT before actually using it. If the 
  XSDT is found to be invalid, ACPICA will now automatically fall back to 
  using the RSDT instead. Original implementation by Zhao Yakui. Ported to 
  ACPICA and enhanced by Lv Zheng and Bob Moore.
  
  Added a runtime option to ignore the XSDT and force the use of the RSDT. 
  This change adds a runtime option that will force ACPICA to use the RSDT 
  instead of the XSDT (AcpiGbl_DoNotUseXsdt). Although the ACPI spec 
  requires that an XSDT be used instead of the RSDT, the XSDT has been 
  found to be corrupt or ill-formed on some machines. Lv Zheng.
  
  Added a runtime option to favor 32-bit FADT register addresses over the 
  64-bit addresses. This change adds an option to favor 32-bit FADT 
  addresses when there is a conflict between the 32-bit and 64-bit versions 
  of the same register. The default behavior is to use the 64-bit version 
  in accordance with the ACPI specification. This can now be overridden via 
  the AcpiGbl_Use32BitFadtAddresses flag. ACPICA BZ 885. Lv Zheng.
  
  During the change above, the internal "Convert FADT" and "Verify FADT" 
  functions have been merged to simplify the code, making it easier to 
  understand and maintain. ACPICA BZ 933.
  
  Improve exception reporting and handling for GPE block installation. 
  Return an actual status from AcpiEvGetGpeXruptBlock and don't clobber the 
  status when exiting AcpiEvInstallGpeBlock. ACPICA BZ 1019.
  
  Added helper macros to extract bus/segment numbers from the HEST table. 
  This change adds two macros to extract the encoded bus and segment 
  numbers from the HEST Bus field - ACPI_HEST_BUS and ACPI_HEST_SEGMENT. 
  Betty Dall <betty.dall@hp.com>
  
  Removed the unused ACPI_FREE_BUFFER macro. This macro is no longer used 
  by ACPICA. It is not a public macro, so it should have no effect on 
  existing OSV code. Lv Zheng.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Current Release:
      Non-Debug Version:  96.1K Code, 27.0K Data, 123.1K Total
      Debug Version:     185.6K Code, 77.3K Data, 262.9K Total
    Previous Release:
      Non-Debug Version:  95.9K Code, 27.0K Data, 122.9K Total
      Debug Version:     185.1K Code, 77.2K Data, 262.3K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  Disassembler: Improved pathname support for emitted External() 
  statements. This change adds full pathname support for external names 
  that have been resolved internally by the inclusion of additional ACPI 
  tables (via the iASL -e option). Without this change, the disassembler 
  can emit multiple externals for the same object, or it become confused 
  when the Scope() operator is used on an external object. Overall, greatly 
  improves the ability to actually recompile the emitted ASL code when 
  objects a referenced across multiple ACPI tables. Reported by Michael 
  Tsirkin (mst@redhat.com).
  
  Tests/ASLTS: Updated functional control suite to execute with no errors. 
  David Box. Fixed several errors related to the testing of the interpreter 
  slack mode. Lv Zheng.
  
  iASL: Added support to detect names that are declared within a control 
  method, but are unused (these are temporary names that are only valid 
  during the time the method is executing). A remark is issued for these 
  cases. ACPICA BZ 1022.
  
  iASL: Added full support for the DBG2 table. Adds full disassembler, 
  table compiler, and template generator support for the DBG2 table (Debug 
  Port 2 table).
  
  iASL: Added full support for the PCCT table, update the table definition. 
  Updates the PCCT table definition in the actbl3.h header and adds table 
  compiler and template generator support.
  
  iASL: Added an option to emit only error messages (no warnings/remarks). 
  The -ve option will enable only error messages, warnings and remarks are 
  suppressed. This can simplify debugging when only the errors are 
  important, such as when an ACPI table is disassembled and there are many 
  warnings and remarks -- but only the actual errors are of real interest.
  
  Example ACPICA code (source/tools/examples): Updated the example code so 
  that it builds to an actual working program, not just example code. Added 
  ACPI tables and execution of an example control method in the DSDT. Added 
  makefile support for Unix generation.
  
  
  ----------------------------------------
  15 November 2013. Summary of changes for version 20131115:
  
  This release is available at https://acpica.org/downloads
  
  
  1) ACPICA kernel-resident subsystem:
  
  Resource Manager: Fixed loop termination for the "get AML length" 
  function. The loop previously had an error termination on a NULL resource 
  pointer, which can never happen since the loop simply increments a valid 
  resource pointer. This fix changes the loop to terminate with an error on 
  an invalid end-of-buffer condition. The problem can be seen as an 
  infinite loop by callers to AcpiSetCurrentResources with an invalid or 
  corrupted resource descriptor, or a resource descriptor that is missing 
  an END_TAG descriptor. Reported by Dan Carpenter 
  <dan.carpenter@oracle.com>. Lv Zheng, Bob Moore.
  
  Table unload and ACPICA termination: Delete all attached data objects 
  during namespace node deletion. This fix updates namespace node deletion 
  to delete the entire list of attached objects (attached via 
  AcpiAttachObject) instead of just one of the attached items. ACPICA BZ 
  1024. Tomasz Nowicki (tomasz.nowicki@linaro.org).
  
  ACPICA termination: Added support to delete all objects attached to the 
  root namespace node. This fix deletes any and all objects that have been 
  attached to the root node via AcpiAttachData. Previously, none of these 
  objects were deleted. Reported by Tomasz Nowicki. ACPICA BZ 1026.
  
  Debug output: Do not emit the function nesting level for the in-kernel 
  build. The nesting level is really only useful during a single-thread 
  execution. Therefore, only enable this output for the AcpiExec utility. 
  Also, only emit the thread ID when executing under AcpiExec (Context 
  switches are still always detected and a message is emitted). ACPICA BZ 
  972.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Current Release:
      Non-Debug Version:  95.9K Code, 27.0K Data, 122.9K Total
      Debug Version:     185.1K Code, 77.2K Data, 262.3K Total
    Previous Release:
      Non-Debug Version:  95.8K Code, 27.0K Data, 122.8K Total
      Debug Version:     185.2K Code, 77.2K Data, 262.4K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  AcpiExec/Unix-OSL: Use <termios.h> instead of <termio.h>. This is the 
  correct portable POSIX header for terminal control functions.
  
  Disassembler: Fixed control method invocation issues related to the use 
  of the CondRefOf() operator. The problem is seen in the disassembly where 
  control method invocations may not be disassembled properly if the 
  control method name has been used previously as an argument to CondRefOf. 
  The solution is to not attempt to emit an external declaration for the 
  CondRefOf target (it is not necessary in the first place). This prevents 
  disassembler object type confusion. ACPICA BZ 988.
  
  Unix Makefiles: Added an option to disable compiler optimizations and the 
  _FORTIFY_SOURCE flag. Some older compilers have problems compiling ACPICA 
  with optimizations (reportedly, gcc 4.4 for example). This change adds a 
  command line option for make (NOOPT) that disables all compiler 
  optimizations and the _FORTIFY_SOURCE compiler flag. The default 
  optimization is -O2 with the _FORTIFY_SOURCE flag specified. ACPICA BZ 
  1034. Lv Zheng, Bob Moore.
  
  Tests/ASLTS: Added options to specify individual test cases and modes. 
  This allows testers running aslts.sh to optionally specify individual 
  test modes and test cases. Also added an option to disable the forced 
  generation of the ACPICA tools from source if desired. Lv Zheng.
  
  ----------------------------------------
  27 September 2013. Summary of changes for version 20130927:
  
  This release is available at https://acpica.org/downloads
  
  
  1) ACPICA kernel-resident subsystem:
  
  Fixed a problem with store operations to reference objects. This change 
  fixes a problem where a Store operation to an ArgX object that contained 
  a 
  reference to a field object did not complete the automatic dereference 
  and 
  then write to the actual field object. Instead, the object type of the 
  field object was inadvertently changed to match the type of the source 
  operand. The new behavior will actually write to the field object (buffer 
  field or field unit), thus matching the correct ACPI-defined behavior.
  
  Implemented support to allow the host to redefine individual OSL 
  prototypes. This change enables the host to redefine OSL prototypes found 
  in the acpiosxf.h file. This allows the host to implement OSL interfaces 
  with a macro or inlined function. Further, it allows the host to add any 
  additional required modifiers such as __iomem, __init, __exit, etc., as 
  necessary on a per-interface basis. Enables maximum flexibility for the 
  OSL interfaces. Lv Zheng.
  
  Hardcoded the access width for the FADT-defined reset register. The ACPI 
  specification requires the reset register width to be 8 bits. ACPICA now 
  hardcodes the width to 8 and ignores the FADT width value. This provides 
  compatibility with other ACPI implementations that have allowed BIOS code 
  with bad register width values to go unnoticed. Matthew Garett, Bob 
  Moore, 
  Lv Zheng.
  
  Changed the position/use of the ACPI_PRINTF_LIKE macro. This macro is 
  used 
  in the OSL header (acpiosxf). The change modifies the position of this 
  macro in each instance where it is used (AcpiDebugPrint, etc.) to avoid 
  build issues if the OSL defines the implementation of the interface to be 
  an inline stub function. Lv Zheng.
  
  Deployed a new macro ACPI_EXPORT_SYMBOL_INIT for the main ACPICA 
  initialization interfaces. This change adds a new macro for the main init 
  and terminate external interfaces in order to support hosts that require 
  additional or different processing for these functions. Changed from 
  ACPI_EXPORT_SYMBOL to ACPI_EXPORT_SYMBOL_INIT for these functions. Lv 
  Zheng, Bob Moore.
  
  Cleaned up the memory allocation macros for configurability. In the 
  common 
  case, the ACPI_ALLOCATE and related macros now resolve directly to their 
  respective AcpiOs* OSL interfaces. Two options:
  1) The ACPI_ALLOCATE_ZEROED macro uses a simple local implementation by 
  default, unless overridden by the USE_NATIVE_ALLOCATE_ZEROED define.
  2) For AcpiExec (and for debugging), the macros can optionally be 
  resolved 
  to the local ACPICA interfaces that track each allocation (local tracking 
  is used to immediately detect memory leaks).
  Lv Zheng.
  
  Simplified the configuration for ACPI_REDUCED_HARDWARE. Allows the kernel 
  to predefine this macro to either TRUE or FALSE during the system build.
  
  Replaced __FUNCTION_ with __func__ in the gcc-specific header.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Current Release:
      Non-Debug Version:  95.8K Code, 27.0K Data, 122.8K Total
      Debug Version:     185.2K Code, 77.2K Data, 262.4K Total
    Previous Release:
      Non-Debug Version:  96.7K Code, 27.1K Data, 123.9K Total
      Debug Version:     184.4K Code, 76.8K Data, 261.2K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Implemented wildcard support for the -e option. This simplifies use 
  when there are many SSDTs that must be included to resolve external 
  method 
  declarations. ACPICA BZ 1041. Example:
      iasl -e ssdt*.dat -d dsdt.dat
  
  AcpiExec: Add history/line-editing for Unix/Linux systems. This change 
  adds a portable module that implements full history and limited line 
  editing for Unix and Linux systems. It does not use readline() due to 
  portability issues. Instead it uses the POSIX termio interface to put the 
  terminal in raw input mode so that the various special keys can be 
  trapped 
  (such as up/down-arrow for history support and left/right-arrow for line 
  editing). Uses the existing debugger history mechanism. ACPICA BZ 1036.
  
  AcpiXtract: Add support to handle (ignore) "empty" lines containing only 
  one or more spaces. This provides compatible with early or different 
  versions of the AcpiDump utility. ACPICA BZ 1044.
  
  AcpiDump: Do not ignore tables that contain only an ACPI table header. 
  Apparently, some BIOSs create SSDTs that contain an ACPI table header but 
  no other data. This change adds support to dump these tables. Any tables 
  shorter than the length of an ACPI table header remain in error (an error 
  message is emitted). Reported by Yi Li.
  
  Debugger: Echo actual command along with the "unknown command" message.
  
  ----------------------------------------
  23 August 2013. Summary of changes for version 20130823:
  
  1) ACPICA kernel-resident subsystem:
  
  Implemented support for host-installed System Control Interrupt (SCI) 
  handlers. Certain ACPI functionality requires the host to handle raw 
  SCIs. For example, the "SCI Doorbell" that is defined for memory power 
  state support requires the host device driver to handle SCIs to examine 
  if the doorbell has been activated. Multiple SCI handlers can be 
  installed to allow for future expansion. New external interfaces are 
  AcpiInstallSciHandler, AcpiRemoveSciHandler; see the ACPICA reference for 
  details. Lv Zheng, Bob Moore. ACPICA BZ 1032.
  
  Operation region support: Never locally free the handler "context" 
  pointer. This change removes some dangerous code that attempts to free 
  the handler context pointer in some (rare) circumstances. The owner of 
  the handler owns this pointer and the ACPICA code should never touch it. 
  Although not seen to be an issue in any kernel, it did show up as a 
  problem (fault) under AcpiExec. Also, set the internal storage field for 
  the context pointer to zero when the region is deactivated, simply for 
  sanity. David Box. ACPICA BZ 1039.
  
  AcpiRead: On error, do not modify the return value target location. If an 
  error happens in the middle of a split 32/32 64-bit I/O operation, do not 
  modify the target of the return value pointer. Makes the code consistent 
  with the rest of ACPICA. Bjorn Helgaas.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Current Release:
      Non-Debug Version:  96.7K Code, 27.1K Data, 123.9K Total
      Debug Version:     184.4K Code, 76.8K Data, 261.2K Total
    Previous Release:
      Non-Debug Version:  96.2K Code, 27.1K Data, 123.3K Total
      Debug Version:     185.4K Code, 77.1K Data, 262.5K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  AcpiDump: Implemented several new features and fixed some problems:
  1) Added support to dump the RSDP, RSDT, and XSDT tables.
  2) Added support for multiple table instances (SSDT, UEFI).
  3) Added option to dump "customized" (overridden) tables (-c).
  4) Fixed a problem where some table filenames were improperly 
  constructed.
  5) Improved some error messages, removed some unnecessary messages.
  
  iASL: Implemented additional support for disassembly of ACPI tables that 
  contain invocations of external control methods. The -fe<file> option 
  allows the import of a file that specifies the external methods along 
  with the required number of arguments for each -- allowing for the 
  correct disassembly of the table. This is a workaround for a limitation 
  of AML code where the disassembler often cannot determine the number of 
  arguments required for an external control method and generates incorrect 
  ASL code. See the iASL reference for details. ACPICA BZ 1030.
  
  Debugger: Implemented a new command (paths) that displays the full 
  pathnames (namepaths) and object types of all objects in the namespace. 
  This is an alternative to the namespace command.
  
  Debugger: Implemented a new command (sci) that invokes the SCI dispatch 
  mechanism and any installed handlers.
  
  iASL: Fixed a possible segfault for "too many parent prefixes" condition. 
  This can occur if there are too many parent prefixes in a namepath (for 
  example, ^^^^^^PCI0.ECRD). ACPICA BZ 1035.
  
  Application OSLs: Set the return value for the PCI read functions. These 
  functions simply return AE_OK, but should set the return value to zero 
  also. This change implements this. ACPICA BZ 1038.
  
  Debugger: Prevent possible command line buffer overflow. Increase the 
  size of a couple of the debugger line buffers, and ensure that overflow 
  cannot happen. ACPICA BZ 1037.
  
  iASL: Changed to abort immediately on serious errors during the parsing 
  phase. Due to the nature of ASL, there is no point in attempting to 
  compile these types of errors, and they typically end up causing a 
  cascade of hundreds of errors which obscure the original problem.
  
  ----------------------------------------
  25 July 2013. Summary of changes for version 20130725:
  
  1) ACPICA kernel-resident subsystem:
  
  Fixed a problem with the DerefOf operator where references to FieldUnits 
  and BufferFields incorrectly returned the parent object, not the actual 
  value of the object. After this change, a dereference of a FieldUnit 
  reference results in a read operation on the field to get the value, and 
  likewise, the appropriate BufferField value is extracted from the target 
  buffer.
  
  Fixed a problem where the _WAK method could cause a fault under these 
  circumstances: 1) Interpreter slack mode was not enabled, and 2) the _WAK 
  method returned no value. The problem is rarely seen because most kernels 
  run ACPICA in slack mode.
  
  For the DerefOf operator, a fatal error now results if an attempt is made 
  to dereference a reference (created by the Index operator) to a NULL 
  package element. Provides compatibility with other ACPI implementations, 
  and this behavior will be added to a future version of the ACPI 
  specification.
  
  The ACPI Power Management Timer (defined in the FADT) is now optional. 
  This provides compatibility with other ACPI implementations and will 
  appear in the next version of the ACPI specification. If there is no PM 
  Timer on the platform, AcpiGetTimer returns AE_SUPPORT. An address of 
  zero in the FADT indicates no PM timer.
  
  Implemented a new interface for _OSI support, AcpiUpdateInterfaces. This 
  allows the host to globally enable/disable all vendor strings, all 
  feature strings, or both. Intended to be primarily used for debugging 
  purposes only. Lv Zheng.
  
  Expose the collected _OSI data to the host via a global variable. This 
  data tracks the highest level vendor ID that has been invoked by the BIOS 
  so that the host (and potentially ACPICA itself) can change behaviors 
  based upon the age of the BIOS.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Current Release:
      Non-Debug Version:  96.2K Code, 27.1K Data, 123.3K Total
      Debug Version:     184.4K Code, 76.8K Data, 261.2K Total
    Previous Release:
      Non-Debug Version:  95.9K Code, 26.9K Data, 122.8K Total
      Debug Version:     184.1K Code, 76.7K Data, 260.8K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Created the following enhancements for the -so option (create 
  offset table):
  1)Add offsets for the last nameseg in each namepath for every supported 
  object type
  2)Add support for Processor, Device, Thermal Zone, and Scope objects
  3)Add the actual AML opcode for the parent object of every supported 
  object type
  4)Add support for the ZERO/ONE/ONES AML opcodes for integer objects
  
  Disassembler: Emit all unresolved external symbols in a single block. 
  These are external references to control methods that could not be 
  resolved, and thus, the disassembler had to make a guess at the number of 
  arguments to parse.
  
  iASL: The argument to the -T option (create table template) is now 
  optional. If not specified, the default table is a DSDT, typically the 
  most common case.
  
  ----------------------------------------
  26 June 2013. Summary of changes for version 20130626:
  
  1) ACPICA kernel-resident subsystem:
  
  Fixed an issue with runtime repair of the _CST object. Null or invalid 
  elements were not always removed properly. Lv Zheng. 
  
  Removed an arbitrary restriction of 256 GPEs per GPE block (such as the 
  FADT-defined GPE0 and GPE1). For GPE0, GPE1, and each GPE Block Device, 
  the maximum number of GPEs is 1016. Use of multiple GPE block devices 
  makes the system-wide number of GPEs essentially unlimited.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Current Release:
      Non-Debug Version:  95.9K Code, 26.9K Data, 122.8K Total
      Debug Version:     184.1K Code, 76.7K Data, 260.8K Total
    Previous Release:
      Non-Debug Version:  96.0K Code, 27.0K Data, 123.0K Total
      Debug Version:     184.1K Code, 76.8K Data, 260.9K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  Portable AcpiDump: Implemented full support for the Linux and FreeBSD 
  hosts. Now supports Linux, FreeBSD, and Windows.
  
  Disassembler: Added some missing types for the HEST and EINJ tables: "Set 
  Error Type With Address", "CMCI", "MCE", and "Flush Cacheline".
  
  iASL/Preprocessor: Implemented full support for nested 
  #if/#else/#elif/#endif blocks. Allows arbitrary depth of nested blocks.
  
  Disassembler: Expanded maximum output string length to 64K. Was 256 bytes 
  max. The original purpose of this constraint was to limit the amount of 
  debug output. However, the string function in question (UtPrintString) is 
  now used for the disassembler also, where 256 bytes is insufficient. 
  Reported by RehabMan@GitHub.
  
  iASL/DataTables: Fixed some problems and issues with compilation of DMAR 
  tables. ACPICA BZ 999. Lv Zheng.
  
  iASL: Fixed a couple of error exit issues that could result in a "Could 
  not delete <file>" message during ASL compilation.
  
  AcpiDump: Allow "FADT" and "MADT" as valid table signatures, even though 
  the actual signatures for these tables are "FACP" and "APIC", 
  respectively.
  
  AcpiDump: Added support for multiple UEFI tables. Only SSDT and UEFI 
  tables are allowed to have multiple instances.
  
  ----------------------------------------
  17 May 2013. Summary of changes for version 20130517:
  
  1) ACPICA kernel-resident subsystem:
  
  Fixed a regression introduced in version 20130328 for _INI methods. This 
  change fixes a problem introduced in 20130328 where _INI methods are no 
  longer executed properly because of a memory block that was not 
  initialized correctly. ACPICA BZ 1016. Tomasz Nowicki 
  <tomasz.nowicki@linaro.org>.
  
  Fixed a possible problem with the new extended sleep registers in the 
  ACPI 
  5.0 FADT. Do not use these registers (even if populated) unless the HW-
  reduced bit is set in the FADT (as per the ACPI specification). ACPICA BZ 
  1020. Lv Zheng.
  
  Implemented return value repair code for _CST predefined objects: Sort 
  the 
  list and detect/remove invalid entries. ACPICA BZ 890. Lv Zheng.
  
  Implemented a debug-only option to disable loading of SSDTs from the 
  RSDT/XSDT during ACPICA initialization. This can be useful for debugging 
  ACPI problems on some machines. Set AcpiGbl_DisableSsdtTableLoad in 
  acglobal.h - ACPICA BZ 1005. Lv Zheng.
  
  Fixed some issues in the ACPICA initialization and termination code: 
  Tomasz Nowicki <tomasz.nowicki@linaro.org>
  1) Clear events initialized flag upon event component termination. ACPICA 
  BZ 1013.
  2) Fixed a possible memory leak in GPE init error path. ACPICA BZ 1018. 
  3) Delete global lock pending lock during termination. ACPICA BZ 1012.
  4) Clear debug buffer global on termination to prevent possible multiple 
  delete. ACPICA BZ 1010.
  
  Standardized all switch() blocks across the entire source base. After 
  many 
  years, different formatting for switch() had crept in. This change makes 
  the formatting of every switch block identical. ACPICA BZ 997. Chao Guan.
  
  Split some files to enhance ACPICA modularity and configurability:
  1) Split buffer dump routines into utilities/utbuffer.c
  2) Split internal error message routines into utilities/uterror.c
  3) Split table print utilities into tables/tbprint.c
  4) Split iASL command-line option processing into asloptions.c
  
  Makefile enhancements:
  1) Support for all new files above.
  2) Abort make on errors from any subcomponent. Chao Guan.
  3) Add build support for Apple Mac OS X. Liang Qi.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Current Release:
      Non-Debug Version:  96.0K Code, 27.0K Data, 123.0K Total
      Debug Version:     184.1K Code, 76.8K Data, 260.9K Total
    Previous Release:
      Non-Debug Version:  95.6K Code, 26.8K Data, 122.4K Total
      Debug Version:     183.5K Code, 76.6K Data, 260.1K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  New utility: Implemented an easily portable version of the acpidump 
  utility to extract ACPI tables from the system (or a file) in an ASCII 
  hex 
  dump format. The top-level code implements the various command line 
  options, file I/O, and table dump routines. To port to a new host, only 
  three functions need to be implemented to get tables -- since this 
  functionality is OS-dependent. See the tools/acpidump/apmain.c module and 
  the ACPICA reference for porting instructions. ACPICA BZ 859. Notes:
  1) The Windows version obtains the ACPI tables from the Registry.
  2) The Linux version is under development.
  3) Other hosts - If an OS-dependent module is submitted, it will be 
  distributed with ACPICA.
  
  iASL: Fixed a regression for -D preprocessor option (define symbol). A 
  restructuring/change to the initialization sequence caused this option to 
  no longer work properly.
  
  iASL: Implemented a mechanism to disable specific warnings and remarks. 
  Adds a new command line option, "-vw <messageid> as well as "#pragma 
  disable <messageid>". ACPICA BZ 989. Chao Guan, Bob Moore.
  
  iASL: Fix for too-strict package object validation. The package object 
  validation for return values from the predefined names is a bit too 
  strict, it does not allow names references within the package (which will 
  be resolved at runtime.) These types of references cannot be validated at 
  compile time. This change ignores named references within package objects 
  for names that return or define static packages.
  
  Debugger: Fixed the 80-character command line limitation for the History 
  command. Now allows lines of arbitrary length. ACPICA BZ 1000. Chao Guan.
  
  iASL: Added control method and package support for the -so option 
  (generates AML offset table for BIOS support.)
  
  iASL: issue a remark if a non-serialized method creates named objects. If 
  a thread blocks within the method for any reason, and another thread 
  enters the method, the method will fail because an attempt will be made 
  to 
  create the same (named) object twice. In this case, issue a remark that 
  the method should be marked serialized. NOTE: may become a warning later. 
  ACPICA BZ 909.
  
  ----------------------------------------
  18 April 2013. Summary of changes for version 20130418:
  
  1) ACPICA kernel-resident subsystem:
  
  Fixed a possible buffer overrun during some rare but specific field unit 
  read operations. This overrun can only happen if the DSDT version is 1 -- 
  meaning that all AML integers are 32 bits -- and the field length is 
  between 33 and 55 bits long. During the read, an internal buffer object 
  is 
  created for the field unit because the field is larger than an integer 
  (32 
  bits). However, in this case, the buffer will be incorrectly written 
  beyond the end because the buffer length is less than the internal 
  minimum 
  of 64 bits (8 bytes) long. The buffer will be either 5, 6, or 7 bytes 
  long, but a full 8 bytes will be written.
  
  Updated the Embedded Controller "orphan" _REG method support. This refers 
  to _REG methods under the EC device that have no corresponding operation 
  region. This is allowed by the ACPI specification. This update removes a 
  dependency on the existence an ECDT table. It will execute an orphan _REG 
  method as long as the operation region handler for the EC is installed at 
  the EC device node and not the namespace root. Rui Zhang (original 
  update), Bob Moore (update/integrate).
  
  Implemented run-time argument typechecking for all predefined ACPI names 
  (_STA, _BIF, etc.) This change performs object typechecking on all 
  incoming arguments for all predefined names executed via 
  AcpiEvaluateObject. This ensures that ACPI-related device drivers are 
  passing correct object types as well as the correct number of arguments 
  (therefore identifying any issues immediately). Also, the ASL/namespace 
  definition of the predefined name is checked against the ACPI 
  specification for the proper argument count. Adds one new file, 
  nsarguments.c
  
  Changed an exception code for the ASL UnLoad() operator. Changed the 
  exception code for the case where the input DdbHandle is invalid, from 
  AE_BAD_PARAMETER to the more appropriate AE_AML_OPERAND_TYPE.
  
  Unix/Linux makefiles: Removed the use of the -O2 optimization flag in the 
  global makefile. The use of this flag causes compiler errors on earlier 
  versions of GCC, so it has been removed for compatibility.
  
  Miscellaneous cleanup:
  1) Removed some unused/obsolete macros
  2) Fixed a possible memory leak in the _OSI support
  3) Removed an unused variable in the predefined name support
  4) Windows OSL: remove obsolete reference to a memory list field
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Current Release:
      Non-Debug Version:  95.2K Code, 26.4K Data, 121.6K Total
      Debug Version:     183.0K Code, 76.0K Data, 259.0K Total
    Previous Release:
      Non-Debug Version:  95.6K Code, 26.8K Data, 122.4K Total
      Debug Version:     183.5K Code, 76.6K Data, 260.1K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  AcpiExec: Added installation of a handler for the SystemCMOS address 
  space. This prevents control method abort if a method accesses this 
  space.
  
  AcpiExec: Added support for multiple EC devices, and now install EC 
  operation region handler(s) at the actual EC device instead of the 
  namespace root. This reflects the typical behavior of host operating 
  systems.
  
  AcpiExec: Updated to ensure that all operation region handlers are 
  installed before the _REG methods are executed. This prevents a _REG 
  method from aborting if it accesses an address space has no handler. 
  AcpiExec installs a handler for every possible address space.
  
  Debugger: Enhanced the "handlers" command to display non-root handlers. 
  This change enhances the handlers command to display handlers associated 
  with individual devices throughout the namespace, in addition to the 
  currently supported display of handlers associated with the root 
  namespace 
  node.
  
  ASL Test Suite: Several test suite errors have been identified and 
  resolved, reducing the total error count during execution. Chao Guan.
  
  ----------------------------------------
  28 March 2013. Summary of changes for version 20130328:
  
  1) ACPICA kernel-resident subsystem:
  
  Fixed several possible race conditions with the internal object reference 
  counting mechanism. Some of the external ACPICA interfaces update object 
  reference counts without holding the interpreter or namespace lock. This 
  change adds a spinlock to protect reference count updates on the internal 
  ACPICA objects. Reported by and with assistance from Andriy Gapon 
  (avg@FreeBSD.org).
  
  FADT support: Removed an extraneous warning for very large GPE register 
  sets. This change removes a size mismatch warning if the legacy length 
  field for a GPE register set is larger than the 64-bit GAS structure can 
  accommodate. GPE register sets can be larger than the 255-bit width 
  limitation of the GAS structure. Linn Crosetto (linn@hp.com).
  
  _OSI Support: handle any errors from AcpiOsAcquireMutex. Check for error 
  return from this interface. Handles a possible timeout case if 
  ACPI_WAIT_FOREVER is modified by the host to be a value less than 
  "forever". Jung-uk Kim.
  
  Predefined name support: Add allowed/required argument type information 
  to 
  the master predefined info table. This change adds the infrastructure to 
  enable typechecking on incoming arguments for all predefined 
  methods/objects. It does not actually contain the code that will fully 
  utilize this information, this is still under development. Also condenses 
  some duplicate code for the predefined names into a new module, 
  utilities/utpredef.c
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Previous Release:
      Non-Debug Version:  95.0K Code, 25.9K Data, 120.9K Total
      Debug Version:     182.9K Code, 75.6K Data, 258.5K Total
    Current Release:
      Non-Debug Version:  95.2K Code, 26.4K Data, 121.6K Total
      Debug Version:     183.0K Code, 76.0K Data, 259.0K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Implemented a new option to simplify the development of ACPI-
  related 
  BIOS code. Adds support for a new "offset table" output file. The -so 
  option will create a C table containing the AML table offsets of various 
  named objects in the namespace so that BIOS code can modify them easily 
  at 
  boot time. This can simplify BIOS runtime code by eliminating expensive 
  searches for "magic values", enhancing boot times and adding greater 
  reliability. With assistance from Lee Hamel.
  
  iASL: Allow additional predefined names to return zero-length packages. 
  Now, all predefined names that are defined by the ACPI specification to 
  return a "variable-length package of packages" are allowed to return a 
  zero length top-level package. This allows the BIOS to tell the host that 
  the requested feature is not supported, and supports existing BIOS/ASL 
  code and practices.
  
  iASL: Changed the "result not used" warning to an error. This is the case 
  where an ASL operator is effectively a NOOP because the result of the 
  operation is not stored anywhere. For example:
      Add (4, Local0)
  There is no target (missing 3rd argument), nor is the function return 
  value used. This is potentially a very serious problem -- since the code 
  was probably intended to do something, but for whatever reason, the value 
  was not stored. Therefore, this issue has been upgraded from a warning to 
  an error.
  
  AcpiHelp: Added allowable/required argument types to the predefined names 
  info display. This feature utilizes the recent update to the predefined 
  names table (above).
  
  ----------------------------------------
  14 February 2013. Summary of changes for version 20130214:
  
  1) ACPICA Kernel-resident Subsystem:
  
  Fixed a possible regression on some hosts: Reinstated the safe return 
  macros (return_ACPI_STATUS, etc.) that ensure that the argument is 
  evaluated only once. Although these macros are not needed for the ACPICA 
  code itself, they are often used by ACPI-related host device drivers 
  where 
  the safe feature may be necessary.
  
  Fixed several issues related to the ACPI 5.0 reduced hardware support 
  (SOC): Now ensure that if the platform declares itself as hardware-
  reduced 
  via the FADT, the following functions become NOOPs (and always return 
  AE_OK) because ACPI is always enabled by definition on these machines:
    AcpiEnable
    AcpiDisable
    AcpiHwGetMode
    AcpiHwSetMode
  
  Dynamic Object Repair: Implemented additional runtime repairs for 
  predefined name return values. Both of these repairs can simplify code in 
  the related device drivers that invoke these methods:
  1) For the _STR and _MLS names, automatically repair/convert an ASCII 
  string to a Unicode buffer. 
  2) For the _CRS, _PRS, and _DMA names, return a resource descriptor with 
  a 
  lone end tag descriptor in the following cases: A Return(0) was executed, 
  a null buffer was returned, or no object at all was returned (non-slack 
  mode only). Adds a new file, nsconvert.c
  ACPICA BZ 998. Bob Moore, Lv Zheng.
  
  Resource Manager: Added additional code to prevent possible infinite 
  loops 
  while traversing corrupted or ill-formed resource template buffers. Check 
  for zero-length resource descriptors in all code that loops through 
  resource templates (the length field is used to index through the 
  template). This change also hardens the external AcpiWalkResources and 
  AcpiWalkResourceBuffer interfaces.
  
  Local Cache Manager: Enhanced the main data structure to eliminate an 
  unnecessary mechanism to access the next object in the list. Actually 
  provides a small performance enhancement for hosts that use the local 
  ACPICA cache manager. Jung-uk Kim.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Previous Release:
      Non-Debug Version:  94.5K Code, 25.4K Data, 119.9K Total
      Debug Version:     182.3K Code, 75.0K Data, 257.3K Total
    Current Release:
      Non-Debug Version:  95.0K Code, 25.9K Data, 120.9K Total
      Debug Version:     182.9K Code, 75.6K Data, 258.5K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL/Disassembler: Fixed several issues with the definition of the ACPI 
  5.0 RASF table (RAS Feature Table). This change incorporates late changes 
  that were made to the ACPI 5.0 specification.
  
  iASL/Disassembler: Added full support for the following new ACPI tables:
    1) The MTMR table (MID Timer Table)
    2) The VRTC table (Virtual Real Time Clock Table).
  Includes header file, disassembler, table compiler, and template support 
  for both tables.
  
  iASL: Implemented compile-time validation of package objects returned by 
  predefined names. This new feature validates static package objects 
  returned by the various predefined names defined to return packages. Both 
  object types and package lengths are validated, for both parent packages 
  and sub-packages, if any. The code is similar in structure and behavior 
  to 
  the runtime repair mechanism within the AML interpreter and uses the 
  existing predefined name information table. Adds a new file, aslprepkg.c. 
  ACPICA BZ 938.
  
  iASL: Implemented auto-detection of binary ACPI tables for disassembly. 
  This feature detects a binary file with a valid ACPI table header and 
  invokes the disassembler automatically. Eliminates the need to 
  specifically invoke the disassembler with the -d option. ACPICA BZ 862.
  
  iASL/Disassembler: Added several warnings for the case where there are 
  unresolved control methods during the disassembly. This can potentially 
  cause errors when the output file is compiled, because the disassembler 
  assumes zero method arguments in these cases (it cannot determine the 
  actual number of arguments without resolution/definition of the method).
  
  Debugger: Added support to display all resources with a single command. 
  Invocation of the resources command with no arguments will now display 
  all 
  resources within the current namespace.
  
  AcpiHelp: Added descriptive text for each ACPICA exception code displayed 
  via the -e option.
  
  ----------------------------------------
  17 January 2013. Summary of changes for version 20130117:
  
  1) ACPICA Kernel-resident Subsystem:
  
  Updated the AcpiGetSleepTypeData interface: Allow the \_Sx methods to 
  return either 1 or 2 integers. Although the ACPI spec defines the \_Sx 
  objects to return a package containing one integer, most BIOS code 
  returns 
  two integers and the previous code reflects that. However, we also need 
  to 
  support BIOS code that actually implements to the ACPI spec, and this 
  change reflects this.
  
  Fixed two issues with the ACPI_DEBUG_PRINT macros:
  1) Added the ACPI_DO_WHILE macro to the main DEBUG_PRINT helper macro for 
  C compilers that require this support.
  2) Renamed the internal ACPI_DEBUG macro to ACPI_DO_DEBUG_PRINT since 
  ACPI_DEBUG is already used by many of the various hosts.
  
  Updated all ACPICA copyrights and signons to 2013. Added the 2013 
  copyright to all module headers and signons, including the standard Linux 
  header. This affects virtually every file in the ACPICA core subsystem, 
  iASL compiler, all ACPICA utilities, and the test suites.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Previous Release:
      Non-Debug Version:  94.5K Code, 25.5K Data, 120.0K Total
      Debug Version:     182.2K Code, 74.9K Data, 257.1K Total
    Current Release:
      Non-Debug Version:  94.5K Code, 25.4K Data, 119.9K Total
      Debug Version:     182.3K Code, 75.0K Data, 257.3K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  Generic Unix OSL: Use a buffer to eliminate multiple vfprintf()s and 
  prevent a possible fault on some hosts. Some C libraries modify the arg 
  pointer parameter to vfprintf making it difficult to call it twice in the 
  AcpiOsVprintf function. Use a local buffer to workaround this issue. This 
  does not affect the Windows OSL since the Win C library does not modify 
  the arg pointer. Chao Guan, Bob Moore.
  
  iASL: Fixed a possible infinite loop when the maximum error count is 
  reached. If an output file other than the .AML file is specified (such as 
  a listing file), and the maximum number of errors is reached, do not 
  attempt to flush data to the output file(s) as the compiler is aborting. 
  This can cause an infinite loop as the max error count code essentially 
  keeps calling itself.
  
  iASL/Disassembler: Added an option (-in) to ignore NOOP 
  opcodes/operators. 
  Implemented for both the compiler and the disassembler. Often, the NOOP 
  opcode is used as padding for packages that are changed dynamically by 
  the 
  BIOS. When disassembled and recompiled, these NOOPs will cause syntax 
  errors. This option causes the disassembler to ignore all NOOP opcodes 
  (0xA3), and it also causes the compiler to ignore all ASL source code 
  NOOP 
  statements as well.
  
  Debugger: Enhanced the Sleep command to execute all sleep states. This 
  change allows Sleep to be invoked with no arguments and causes the 
  debugger to execute all of the sleep states, 0-5, automatically.
  
  ----------------------------------------
  20 December 2012. Summary of changes for version 20121220:
  
  1) ACPICA Kernel-resident Subsystem:
  
  Implemented a new interface, AcpiWalkResourceBuffer. This interface is an 
  alternate entry point for AcpiWalkResources and improves the usability of 
  the resource manager by accepting as input a buffer containing the output 
  of either a _CRS, _PRS, or _AEI method. The key functionality is that the 
  input buffer is not deleted by this interface so that it can be used by 
  the host later. See the ACPICA reference for details.
  
  Interpreter: Add a warning if a 64-bit constant appears in a 32-bit table 
  (DSDT version < 2). The constant will be truncated and this warning 
  reflects that behavior.
  
  Resource Manager: Add support for the new ACPI 5.0 wake bit in the IRQ, 
  ExtendedInterrupt, and GpioInt descriptors. This change adds support to 
  both get and set the new wake bit in these descriptors, separately from 
  the existing share bit. Reported by Aaron Lu.
  
  Interpreter: Fix Store() when an implicit conversion is not possible. For 
  example, in the cases such as a store of a string to an existing package 
  object, implement the store as a CopyObject(). This is a small departure 
  from the ACPI specification which states that the control method should 
  be 
  aborted in this case. However, the ASLTS suite depends on this behavior.
  
  Performance improvement for the various FUNCTION_TRACE and DEBUG_PRINT 
  macros: check if debug output is currently enabled as soon as possible to 
  minimize performance impact if debug is in fact not enabled.
  
  Source code restructuring: Cleanup to improve modularity. The following 
  new files have been added: dbconvert.c, evhandler.c, nsprepkg.c, 
  psopinfo.c, psobject.c, rsdumpinfo.c, utstring.c, and utownerid.c. 
  Associated makefiles and project files have been updated.
  
  Changed an exception code for LoadTable operator. For the case where one 
  of the input strings is too long, change the returned exception code from 
  AE_BAD_PARAMETER to AE_AML_STRING_LIMIT.
  
  Fixed a possible memory leak in dispatcher error path. On error, delete 
  the mutex object created during method mutex creation. Reported by 
  tim.gardner@canonical.com.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Previous Release:
      Non-Debug Version:  94.3K Code, 25.3K Data, 119.6K Total
      Debug Version:     175.5K Code, 74.5K Data, 250.0K Total
    Current Release:
      Non-Debug Version:  94.5K Code, 25.5K Data, 120.0K Total
      Debug Version:     182.2K Code, 74.9K Data, 257.1K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Disallow a method call as argument to the ObjectType ASL operator. 
  This change tracks an errata to the ACPI 5.0 document. The AML grammar 
  will not allow the interpreter to differentiate between a method and a 
  method invocation when these are used as an argument to the ObjectType 
  operator. The ACPI specification change is to disallow a method 
  invocation 
  (UserTerm) for the ObjectType operator.
  
  Finish support for the TPM2 and CSRT tables in the headers, table 
  compiler, and disassembler.
  
  Unix user-space OSL: Fix a problem with WaitSemaphore where the timeout 
  always expires immediately if the semaphore is not available. The 
  original 
  code was using a relative-time timeout, but sem_timedwait requires the 
  use 
  of an absolute time.
  
  iASL: Added a remark if the Timer() operator is used within a 32-bit 
  table. This operator returns a 64-bit time value that will be truncated 
  within a 32-bit table.
  
  iASL Source code restructuring: Cleanup to improve modularity. The 
  following new files have been added: aslhex.c, aslxref.c, aslnamesp.c, 
  aslmethod.c, and aslfileio.c. Associated makefiles and project files have 
  been updated.
  
  
  ----------------------------------------
  14 November 2012. Summary of changes for version 20121114:
  
  1) ACPICA Kernel-resident Subsystem:
  
  Implemented a performance enhancement for ACPI/AML Package objects. This 
  change greatly increases the performance of Package objects within the 
  interpreter. It changes the processing of reference counts for packages 
  by 
  optimizing for the most common case where the package sub-objects are 
  either Integers, Strings, or Buffers. Increases the overall performance 
  of 
  the ASLTS test suite by 1.5X (Increases the Slack Mode performance by 
  2X.) 
  Chao Guan. ACPICA BZ 943.
  
  Implemented and deployed common macros to extract flag bits from resource 
  descriptors. Improves readability and maintainability of the code. Fixes 
  a 
  problem with the UART serial bus descriptor for the number of data bits 
  flags (was incorrectly 2 bits, should be 3).
  
  Enhanced the ACPI_GETx and ACPI_SETx macros. Improved the implementation 
  of the macros and changed the SETx macros to the style of (destination, 
  source). Also added ACPI_CASTx companion macros. Lv Zheng.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Previous Release:
      Non-Debug Version:  93.9K Code, 25.2K Data, 119.1K Total
      Debug Version:     175.5K Code, 74.5K Data, 250.0K Total
    Current Release:
      Non-Debug Version:  94.3K Code, 25.3K Data, 119.6K Total
      Debug Version:     175.5K Code, 74.5K Data, 250.0K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  Disassembler: Added the new ACPI 5.0 interrupt sharing flags. This change 
  adds the ShareAndWake and ExclusiveAndWake flags which were added to the 
  Irq, Interrupt, and Gpio resource descriptors in ACPI 5.0. ACPICA BZ 986.
  
  Disassembler: Fixed a problem with external declaration generation. Fixes 
  a problem where an incorrect pathname could be generated for an external 
  declaration if the original reference to the object includes leading 
  carats (^). ACPICA BZ 984.
  
  Debugger: Completed a major update for the Disassemble<method> command. 
  This command was out-of-date and did not properly disassemble control 
  methods that had any reasonable complexity. This fix brings the command 
  up 
  to the same level as the rest of the disassembler. Adds one new file, 
  dmdeferred.c, which is existing code that is now common with the main 
  disassembler and the debugger disassemble command. ACPICA MZ 978.
  
  iASL: Moved the parser entry prototype to avoid a duplicate declaration. 
  Newer versions of Bison emit this prototype, so moved the prototype out 
  of 
  the iASL header to where it is actually used in order to avoid a 
  duplicate 
  declaration.
  
  iASL/Tools: Standardized use of the stream I/O functions:
    1) Ensure check for I/O error after every fopen/fread/fwrite
    2) Ensure proper order of size/count arguments for fread/fwrite
    3) Use test of (Actual != Requested) after all fwrite, and most fread
    4) Standardize I/O error messages
  Improves reliability and maintainability of the code. Bob Moore, Lv 
  Zheng. 
  ACPICA BZ 981.
  
  Disassembler: Prevent duplicate External() statements. During generation 
  of external statements, detect similar pathnames that are actually 
  duplicates such as these:
    External (\ABCD)
    External (ABCD)
  Remove all leading '\' characters from pathnames during the external 
  statement generation so that duplicates will be detected and tossed. 
  ACPICA BZ 985.
  
  Tools: Replace low-level I/O with stream I/O functions. Replace 
  open/read/write/close with the stream I/O equivalents 
  fopen/fread/fwrite/fclose for portability and performance. Lv Zheng, Bob 
  Moore.
  
  AcpiBin: Fix for the dump-to-hex function. Now correctly output the table 
  name header so that AcpiXtract recognizes the output file/table.
  
  iASL: Remove obsolete -2 option flag. Originally intended to force the 
  compiler/disassembler into an ACPI 2.0 mode, this was never implemented 
  and the entire concept is now obsolete.
  
  ----------------------------------------
  18 October 2012. Summary of changes for version 20121018:
  
  
  1) ACPICA Kernel-resident Subsystem:
  
  Updated support for the ACPI 5.0 MPST table. Fixes some problems 
  introduced by late changes to the table as it was added to the ACPI 5.0 
  specification. Includes header, disassembler, and data table compiler 
  support as well as a new version of the MPST template.
  
  AcpiGetObjectInfo: Enhanced the device object support to include the ACPI 
  5.0 _SUB method. Now calls _SUB in addition to the other PNP-related ID 
  methods: _HID, _CID, and _UID.
  
  Changed ACPI_DEVICE_ID to ACPI_PNP_DEVICE_ID. Also changed 
  ACPI_DEVICE_ID_LIST to ACPI_PNP_DEVICE_ID_LIST. These changes prevent 
  name collisions on hosts that reserve the *_DEVICE_ID (or *DeviceId) 
  names for their various drivers. Affects the AcpiGetObjectInfo external 
  interface, and other internal interfaces as well.
  
  Added and deployed a new macro for ACPI_NAME management: ACPI_MOVE_NAME. 
  This macro resolves to a simple 32-bit move of the 4-character ACPI_NAME 
  on machines that support non-aligned transfers. Optimizes for this case 
  rather than using a strncpy. With assistance from Zheng Lv.
  
  Resource Manager: Small fix for buffer size calculation. Fixed a one byte 
  error in the output buffer calculation. Feng Tang. ACPICA BZ 849.
  
  Added a new debug print message for AML mutex objects that are force-
  released. At control method termination, any currently acquired mutex 
  objects are force-released. Adds a new debug-only message for each one 
  that is released.
  
  Audited/updated all ACPICA return macros and the function debug depth 
  counter: 1) Ensure that all functions that use the various TRACE macros 
  also use the appropriate ACPICA return macros. 2) Ensure that all normal 
  return statements surround the return expression (value) with parens to 
  ensure consistency across the ACPICA code base. Guan Chao, Tang Feng, 
  Zheng Lv, Bob Moore. ACPICA Bugzilla 972.
  
  Global source code changes/maintenance: All extra lines at the start and 
  end of each source file have been removed for consistency. Also, within 
  comments, all new sentences start with a single space instead of a double 
  space, again for consistency across the code base.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a much larger code and data size.
  
    Previous Release:
      Non-Debug Version:  93.7K Code, 25.3K Data, 119.0K Total
      Debug Version:     175.0K Code, 74.4K Data, 249.4K Total
    Current Release:
      Non-Debug Version:  93.9K Code, 25.2K Data, 119.1K Total
      Debug Version:     175.5K Code, 74.5K Data, 250.0K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  AcpiExec: Improved the algorithm used for memory leak/corruption 
  detection. Added some intelligence to the code that maintains the global 
  list of allocated memory. The list is now ordered by allocated memory 
  address, significantly improving performance. When running AcpiExec on 
  the ASLTS test suite, speed improvements of 3X to 5X are seen, depending 
  on the platform and/or the environment. Note, this performance 
  enhancement affects the AcpiExec utility only, not the kernel-resident 
  ACPICA code.
  
  Enhanced error reporting for invalid AML opcodes and bad ACPI_NAMEs. For 
  the disassembler, dump the 48 bytes surrounding the invalid opcode. Fix 
  incorrect table offset reported for invalid opcodes. Report the original 
  32-bit value for bad ACPI_NAMEs (as well as the repaired name.)
  
  Disassembler: Enhanced the -vt option to emit the binary table data in 
  hex format to assist with debugging.
  
  Fixed a potential filename buffer overflow in osunixdir.c. Increased the 
  size of file structure. Colin Ian King.
  
  ----------------------------------------
  13 September 2012. Summary of changes for version 20120913:
  
  
  1) ACPICA Kernel-resident Subsystem:
  
  ACPI 5.0: Added two new notify types for the Hardware Error Notification 
  Structure within the Hardware Error Source Table (HEST) table -- CMCI(5) 
  and 
  MCE(6).
   
  Table Manager: Merged/removed duplicate code in the root table resize 
  functions. One function is external, the other is internal. Lv Zheng, 
  ACPICA 
  BZ 846.
  
  Makefiles: Completely removed the obsolete "Linux" makefiles under 
  acpica/generate/linux. These makefiles are obsolete and have been 
  replaced 
  by 
  the generic unix makefiles under acpica/generate/unix.
  
  Makefiles: Ensure that binary files always copied properly. Minor rule 
  change 
  to ensure that the final binary output files are always copied up to the 
  appropriate binary directory (bin32 or bin64.)
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug 
  version of the code includes the debug output trace mechanism and has a 
  much 
  larger code and data size.
  
    Previous Release:
      Non-Debug Version:  93.8K Code, 25.3K Data, 119.1K Total
      Debug Version:     175.7K Code, 74.8K Data, 250.5K Total
    Current Release:
      Non-Debug Version:  93.7K Code, 25.3K Data, 119.0K Total
      Debug Version:     175.0K Code, 74.4K Data, 249.4K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  Disassembler: Fixed a possible fault during the disassembly of resource 
  descriptors when a second parse is required because of the invocation of 
  external control methods within the table. With assistance from 
  adq@lidskialf.net. ACPICA BZ 976.
  
  iASL: Fixed a namepath optimization problem. An error can occur if the 
  parse 
  node that contains the namepath to be optimized does not have a parent 
  node 
  that is a named object. This change fixes the problem.
  
  iASL: Fixed a regression where the AML file is not deleted on errors. The 
  AML 
  output file should be deleted if there are any errors during the 
  compiler. 
  The 
  only exception is if the -f (force output) option is used. ACPICA BZ 974.
  
  iASL: Added a feature to automatically increase internal line buffer 
  sizes. 
  Via realloc(), automatically increase the internal line buffer sizes as 
  necessary to support very long source code lines. The current version of 
  the 
  preprocessor requires a buffer long enough to contain full source code 
  lines. 
  This change increases the line buffer(s) if the input lines go beyond the 
  current buffer size. This eliminates errors that occurred when a source 
  code 
  line was longer than the buffer.
  
  iASL: Fixed a problem with constant folding in method declarations. The 
  SyncLevel term is a ByteConstExpr, and incorrect code would be generated 
  if a 
  Type3 opcode was used.
  
  Debugger: Improved command help support. For incorrect argument count, 
  display 
  full help for the command. For help command itself, allow an argument to 
  specify a command.
  
  Test Suites: Several bug fixes for the ASLTS suite reduces the number of 
  errors during execution of the suite. Guan Chao.
  
  ----------------------------------------
  16 August 2012. Summary of changes for version 20120816:
  
  
  1) ACPICA Kernel-resident Subsystem:
  
  Removed all use of the deprecated _GTS and _BFS predefined methods. The 
  _GTS 
  (Going To Sleep) and _BFS (Back From Sleep) methods are essentially 
  deprecated and will probably be removed from the ACPI specification. 
  Windows 
  does not invoke them, and reportedly never will. The final nail in the 
  coffin 
  is that the ACPI specification states that these methods must be run with 
  interrupts off, which is not going to happen in a kernel interpreter. 
  Note: 
  Linux has removed all use of the methods also. It was discovered that 
  invoking these functions caused failures on some machines, probably 
  because 
  they were never tested since Windows does not call them. Affects two 
  external 
  interfaces, AcpiEnterSleepState and AcpiLeaveSleepStatePrep. Tang Feng. 
  ACPICA BZ 969.
  
  Implemented support for complex bit-packed buffers returned from the _PLD 
  (Physical Location of Device) predefined method. Adds a new external 
  interface, AcpiDecodePldBuffer that parses the buffer into a more usable 
  C 
  structure. Note: C Bitfields cannot be used for this type of predefined 
  structure since the memory layout of individual bitfields is not defined 
  by 
  the C language. In addition, there are endian concerns where a compiler 
  will 
  change the bitfield ordering based on the machine type. The new ACPICA 
  interface eliminates these issues, and should be called after _PLD is 
  executed. ACPICA BZ 954.
  
  Implemented a change to allow a scope change to root (via "Scope (\)") 
  during 
  execution of module-level ASL code (code that is executed at table load 
  time.) Lin Ming.
  
  Added the Windows8/Server2012 string for the _OSI method. This change 
  adds 
  a 
  new _OSI string, "Windows 2012" for both Windows 8 and Windows Server 
  2012.
  
  Added header support for the new ACPI tables DBG2 (Debug Port Table Type 
  2) 
  and CSRT (Core System Resource Table).
  
  Added struct header support for the _FDE, _GRT, _GTM, and _SRT predefined 
  names. This simplifies access to the buffers returned by these predefined 
  names. Adds a new file, include/acbuffer.h. ACPICA BZ 956.
  
  GPE support: Removed an extraneous parameter from the various low-level 
  internal GPE functions. Tang Feng.
  
  Removed the linux makefiles from the unix packages. The generate/linux 
  makefiles are obsolete and have been removed from the unix tarball 
  release 
  packages. The replacement makefiles are under generate/unix, and there is 
  a 
  top-level makefile under the main acpica directory. ACPICA BZ 967, 912.
  
  Updates for Unix makefiles:
  1) Add -D_FORTIFY_SOURCE=2 for gcc generation. Arjan van de Ven.
  2) Update linker flags (move to end of command line) for AcpiExec 
  utility. 
  Guan Chao.
  
  Split ACPICA initialization functions to new file, utxfinit.c. Split from 
  utxface.c to improve modularity and reduce file size.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a 
  much larger code and data size.
  
    Previous Release:
      Non-Debug Version:  93.5K Code, 25.3K Data, 118.8K Total
      Debug Version:     173.7K Code, 74.0K Data, 247.7K Total
    Current Release:
      Non-Debug Version:  93.8K Code, 25.3K Data, 119.1K Total
      Debug Version:     175.7K Code, 74.8K Data, 250.5K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Fixed a problem with constant folding for fixed-length constant 
  expressions. The constant-folding code was not being invoked for constant 
  expressions that allow the use of type 3/4/5 opcodes to generate 
  constants 
  for expressions such as ByteConstExpr, WordConstExpr, etc. This could 
  result 
  in the generation of invalid AML bytecode. ACPICA BZ 970.
  
  iASL: Fixed a generation issue on newer versions of Bison. Newer versions 
  apparently automatically emit some of the necessary externals. This 
  change 
  handles these versions in order to eliminate generation warnings.
  
  Disassembler: Added support to decode the DBG2 and CSRT ACPI tables.
  
  Disassembler: Add support to decode _PLD buffers. The decoded buffer 
  appears 
  within comments in the output file.
  
  Debugger: Fixed a regression with the "Threads" command where 
  AE_BAD_PARAMETER was always returned.
  
  ----------------------------------------
  11 July 2012. Summary of changes for version 20120711:
  
  1) ACPICA Kernel-resident Subsystem:
  
  Fixed a possible fault in the return package object repair code. Fixes a 
  problem that can occur when a lone package object is wrapped with an 
  outer 
  package object in order to force conformance to the ACPI specification. 
  Can 
  affect these predefined names: _ALR, _MLS, _PSS, _TRT, _TSS, _PRT, _HPX, 
  _DLM, 
  _CSD, _PSD, _TSD.
  
  Removed code to disable/enable bus master arbitration (ARB_DIS bit in the 
  PM2_CNT register) in the ACPICA sleep/wake interfaces. Management of the 
  ARB_DIS bit must be implemented in the host-dependent C3 processor power 
  state 
  support. Note, ARB_DIS is obsolete and only applies to older chipsets, 
  both 
  Intel and other vendors. (for Intel: ICH4-M and earlier)
  
  This change removes the code to disable/enable bus master arbitration 
  during 
  suspend/resume. Use of the ARB_DIS bit in the optional PM2_CNT register 
  causes 
  resume problems on some machines. The change has been in use for over 
  seven 
  years within Linux.
  
  Implemented two new external interfaces to support host-directed dynamic 
  ACPI 
  table load and unload. They are intended to simplify the host 
  implementation 
  of hot-plug support:
    AcpiLoadTable: Load an SSDT from a buffer into the namespace.
    AcpiUnloadParentTable: Unload an SSDT via a named object owned by the 
  table.
  See the ACPICA reference for additional details. Adds one new file, 
  components/tables/tbxfload.c
  
  Implemented and deployed two new interfaces for errors and warnings that 
  are 
  known to be caused by BIOS/firmware issues:
    AcpiBiosError: Prints "ACPI Firmware Error" message.
    AcpiBiosWarning: Prints "ACPI Firmware Warning" message.
  Deployed these new interfaces in the ACPICA Table Manager code for ACPI 
  table 
  and FADT errors. Additional deployment to be completed as appropriate in 
  the 
  future. The associated conditional macros are ACPI_BIOS_ERROR and 
  ACPI_BIOS_WARNING. See the ACPICA reference for additional details. 
  ACPICA 
  BZ 
  843.
  
  Implicit notify support: ensure that no memory allocation occurs within a 
  critical region. This fix moves a memory allocation outside of the time 
  that a 
  spinlock is held. Fixes issues on systems that do not allow this 
  behavior. 
  Jung-uk Kim.
  
  Split exception code utilities and tables into a new file, 
  utilities/utexcep.c
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug 
  version of the code includes the debug output trace mechanism and has a 
  much 
  larger code and data size.
  
    Previous Release:
      Non-Debug Version:  93.1K Code, 25.1K Data, 118.2K Total
      Debug Version:     172.9K Code, 73.6K Data, 246.5K Total
    Current Release:
      Non-Debug Version:  93.5K Code, 25.3K Data, 118.8K Total
      Debug Version:     173.7K Code, 74.0K Data, 247.7K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Fixed a parser problem for hosts where EOF is defined as -1 instead 
  of 
  0. Jung-uk Kim.
  
  Debugger: Enhanced the "tables" command to emit additional information 
  about 
  the current set of ACPI tables, including the owner ID and flags decode.
  
  Debugger: Reimplemented the "unload" command to use the new 
  AcpiUnloadParentTable external interface. This command was disable 
  previously 
  due to need for an unload interface.
  
  AcpiHelp: Added a new option to decode ACPICA exception codes. The -e 
  option 
  will decode 16-bit hex status codes (ACPI_STATUS) to name strings.
  
  ----------------------------------------
  20 June 2012. Summary of changes for version 20120620:
  
  
  1) ACPICA Kernel-resident Subsystem:
  
  Implemented support to expand the "implicit notify" feature to allow 
  multiple 
  devices to be notified by a single GPE. This feature automatically 
  generates a 
  runtime device notification in the absence of a BIOS-provided GPE control 
  method (_Lxx/_Exx) or a host-installed handler for the GPE. Implicit 
  notify is 
  provided by ACPICA for Windows compatibility, and is a workaround for 
  BIOS 
  AML 
  code errors. See the description of the AcpiSetupGpeForWake interface in 
  the 
  APCICA reference. Bob Moore, Rafael Wysocki. ACPICA BZ 918.
  
  Changed some comments and internal function names to simplify and ensure 
  correctness of the Linux code translation. No functional changes.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug 
  version of the code includes the debug output trace mechanism and has a 
  much 
  larger code and data size.
  
    Previous Release:
      Non-Debug Version:  93.0K Code, 25.1K Data, 118.1K Total
      Debug Version:     172.7K Code, 73.6K Data, 246.3K Total
    Current Release:
      Non-Debug Version:  93.1K Code, 25.1K Data, 118.2K Total
      Debug Version:     172.9K Code, 73.6K Data, 246.5K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  Disassembler: Added support to emit short, commented descriptions for the 
  ACPI 
  predefined names in order to improve the readability of the disassembled 
  output. ACPICA BZ 959. Changes include:
    1) Emit descriptions for all standard predefined names (_INI, _STA, 
  _PRW, 
  etc.)
    2) Emit generic descriptions for the special names (_Exx, _Qxx, etc.)
    3) Emit descriptions for the resource descriptor names (_MIN, _LEN, 
  etc.)
  
  AcpiSrc: Fixed several long-standing Linux code translation issues. 
  Argument 
  descriptions in function headers are now translated properly to lower 
  case 
  and 
  underscores. ACPICA BZ 961. Also fixes translation problems such as 
  these: 
  (old -> new)
    i_aSL -> iASL
    00-7_f -> 00-7F
    16_k -> 16K
    local_fADT -> local_FADT
    execute_oSI -> execute_OSI
  
  iASL: Fixed a problem where null bytes were inadvertently emitted into 
  some 
  listing files.
  
  iASL: Added the existing debug options to the standard help screen. There 
  are 
  no longer two different help screens. ACPICA BZ 957.
  
  AcpiHelp: Fixed some typos in the various predefined name descriptions. 
  Also 
  expand some of the descriptions where appropriate.
  
  iASL: Fixed the -ot option (display compile times/statistics). Was not 
  working 
  properly for standard output; only worked for the debug file case.
  
  ----------------------------------------
  18 May 2012. Summary of changes for version 20120518:
  
  
  1) ACPICA Core Subsystem:
  
  Added a new OSL interface, AcpiOsWaitEventsComplete. This interface is 
  defined 
  to block until asynchronous events such as notifies and GPEs have 
  completed. 
  Within ACPICA, it is only called before a notify or GPE handler is 
  removed/uninstalled. It also may be useful for the host OS within related 
  drivers such as the Embedded Controller driver. See the ACPICA reference 
  for 
  additional information. ACPICA BZ 868.
  
  ACPI Tables: Added a new error message for a possible overflow failure 
  during 
  the conversion of FADT 32-bit legacy register addresses to internal 
  common 
  64-
  bit GAS structure representation. The GAS has a one-byte "bit length" 
  field, 
  thus limiting the register length to 255 bits. ACPICA BZ 953.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug 
  version of the code includes the debug output trace mechanism and has a 
  much 
  larger code and data size.
  
    Previous Release:
      Non-Debug Version:  92.9K Code, 25.0K Data, 117.9K Total
      Debug Version:     172.6K Code, 73.4K Data, 246.0K Total
    Current Release:
      Non-Debug Version:  93.0K Code, 25.1K Data, 118.1K Total
      Debug Version:     172.7K Code, 73.6K Data, 246.3K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Added the ACPI 5.0 "PCC" keyword for use in the Register() ASL 
  macro. 
  This keyword was added late in the ACPI 5.0 release cycle and was not 
  implemented until now.
  
  Disassembler: Added support for Operation Region externals. Adds missing 
  support for operation regions that are defined in another table, and 
  referenced locally via a Field or BankField ASL operator. Now generates 
  the 
  correct External statement.
  
  Disassembler: Several additional fixes for the External() statement 
  generation 
  related to some ASL operators. Also, order the External() statements 
  alphabetically in the disassembler output. Fixes the External() 
  generation 
  for 
  the Create* field, Alias, and Scope operators:
   1) Create* buffer field operators - fix type mismatch warning on 
  disassembly
   2) Alias - implement missing External support
   3) Scope - fix to make sure all necessary externals are emitted.
  
  iASL: Improved pathname support. For include files, merge the prefix 
  pathname 
  with the file pathname and eliminate unnecessary components. Convert 
  backslashes in all pathnames to forward slashes, for readability. Include 
  file 
  pathname changes affect both #include and Include() type operators.
  
  iASL/DTC/Preprocessor: Gracefully handle early EOF. Handle an EOF at the 
  end 
  of a valid line by inserting a newline and then returning the EOF during 
  the 
  next call to GetNextLine. Prevents the line from being ignored due to EOF 
  condition.
  
  iASL: Implemented some changes to enhance the IDE support (-vi option.) 
  Error 
  and Warning messages are now correctly recognized for both the source 
  code 
  browser and the global error and warning counts.
  
  ----------------------------------------
  20 April 2012. Summary of changes for version 20120420:
  
  
  1) ACPICA Core Subsystem:
  
  Implemented support for multiple notify handlers. This change adds 
  support 
  to 
  allow multiple system and device notify handlers on Device, Thermal Zone, 
  and 
  Processor objects. This can simplify the host OS notification 
  implementation. 
  Also re-worked and restructured the entire notify support code to 
  simplify 
  handler installation, handler removal, notify event queuing, and notify 
  dispatch to handler(s). Note: there can still only be two global notify 
  handlers - one for system notifies and one for device notifies. There are 
  no 
  changes to the existing handler install/remove interfaces. Lin Ming, Bob 
  Moore, Rafael Wysocki.
  
  Fixed a regression in the package repair code where the object reference 
  count was calculated incorrectly. Regression was introduced in the commit 
  "Support to add Package wrappers".
  
  Fixed a couple possible memory leaks in the AML parser, in the error 
  recovery 
  path. Jesper Juhl, Lin Ming.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a 
  much larger code and data size.
  
    Previous Release:
      Non-Debug Version:  92.9K Code, 25.0K Data, 117.9K Total
      Debug Version:     172.5K Code, 73.2K Data, 245.7K Total
    Current Release:
      Non-Debug Version:  92.9K Code, 25.0K Data, 117.9K Total
      Debug Version:     172.6K Code, 73.4K Data, 246.0K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Fixed a problem with the resource descriptor support where the 
  length 
  of the StartDependentFn and StartDependentFnNoPrio descriptors were not 
  included in cumulative descriptor offset, resulting in incorrect values 
  for 
  resource tags within resource descriptors appearing after a 
  StartDependent* 
  descriptor. Reported by Petr Vandrovec. ACPICA BZ 949.
  
  iASL and Preprocessor: Implemented full support for the #line directive 
  to 
  correctly track original source file line numbers through the .i 
  preprocessor 
  output file - for error and warning messages.
  
  iASL: Expand the allowable byte constants for address space IDs. 
  Previously, 
  the allowable range was 0x80-0xFF (user-defined spaces), now the range is 
  0x0A-0xFF to allow for custom and new IDs without changing the compiler.
  
  iASL: Add option to treat all warnings as errors (-we). ACPICA BZ 948.
  
  iASL: Add option to completely disable the preprocessor (-Pn).
  
  iASL: Now emit all error/warning messages to standard error (stderr) by 
  default (instead of the previous stdout).
  
  ASL Test Suite (ASLTS): Reduce iASL warnings due to use of Switch(). 
  Update 
  for resource descriptor offset fix above. Update/cleanup error output 
  routines. Enable and send iASL errors/warnings to an error logfile 
  (error.txt). Send all other iASL output to a logfile (compiler.txt). 
  Fixed 
  several extraneous "unrecognized operator" messages.
  
  ----------------------------------------
  20 March 2012. Summary of changes for version 20120320:
  
  
  1) ACPICA Core Subsystem:
  
  Enhanced the sleep/wake interfaces to optionally execute the _GTS method 
  (Going To Sleep) and the _BFS method (Back From Sleep). Windows 
  apparently 
  does not execute these methods, and therefore these methods are often 
  untested. It has been seen on some systems where the execution of these 
  methods causes errors and also prevents the machine from entering S5. It 
  is 
  therefore suggested that host operating systems do not execute these 
  methods 
  by default. In the future, perhaps these methods can be optionally 
  executed 
  based on the age of the system and/or what is the newest version of 
  Windows 
  that the BIOS asks for via _OSI. Changed interfaces: AcpiEnterSleepState 
  and 
  AcpileaveSleepStatePrep. See the ACPICA reference and Linux BZ 13041. Lin 
  Ming.
  
  Fixed a problem where the length of the local/common FADT was set too 
  early. 
  The local FADT table length cannot be set to the common length until the 
  original length has been examined. There is code that checks the table 
  length 
  and sets various fields appropriately. This can affect older machines 
  with 
  early FADT versions. For example, this can cause inadvertent writes to 
  the 
  CST_CNT register. Julian Anastasov.
  
  Fixed a mapping issue related to a physical table override. Use the 
  deferred 
  mapping mechanism for tables loaded via the physical override OSL 
  interface. 
  This allows for early mapping before the virtual memory manager is 
  available. 
  Thomas Renninger, Bob Moore.
  
  Enhanced the automatic return-object repair code: Repair a common problem 
  with 
  predefined methods that are defined to return a variable-length Package 
  of 
  sub-objects. If there is only one sub-object, some BIOS ASL code 
  mistakenly 
  simply returns the single object instead of a Package with one sub-
  object. 
  This new support will repair this error by wrapping a Package object 
  around 
  the original object, creating the correct and expected Package with one 
  sub-
  object. Names that can be repaired in this manner include: _ALR, _CSD, 
  _HPX, 
  _MLS, _PLD, _PRT, _PSS, _TRT, _TSS, _BCL, _DOD, _FIX, and _Sx. ACPICA BZ 
  939.
  
  Changed the exception code returned for invalid ACPI paths passed as 
  parameters to external interfaces such as AcpiEvaluateObject. Was 
  AE_BAD_PARAMETER, now is the more sensible AE_BAD_PATHNAME.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug 
  version of the code includes the debug output trace mechanism and has a 
  much 
  larger code and data size.
  
    Previous Release:
      Non-Debug Version:  93.0K Code, 25.0K Data, 118.0K Total
      Debug Version:     172.5K Code, 73.2K Data, 245.7K Total
    Current Release:
      Non-Debug Version:  92.9K Code, 25.0K Data, 117.9K Total
      Debug Version:     172.5K Code, 73.2K Data, 245.7K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Added the infrastructure and initial implementation of a integrated 
  C-
  like preprocessor. This will simplify BIOS development process by 
  eliminating 
  the need for a separate preprocessing step during builds. On Windows, it 
  also 
  eliminates the need to install a separate C compiler. ACPICA BZ 761. Some 
  features including full #define() macro support are still under 
  development. 
  These preprocessor directives are supported:
      #define
      #elif
      #else
      #endif
      #error
      #if
      #ifdef
      #ifndef
      #include
      #pragma message
      #undef
      #warning
  In addition, these new command line options are supported:
      -D <symbol> Define symbol for preprocessor use
      -li         Create preprocessed output file (*.i)
      -P          Preprocess only and create preprocessor output file (*.i)
  
  Table Compiler: Fixed a problem where the equals operator within an 
  expression 
  did not work properly.
  
  Updated iASL to use the current versions of Bison/Flex. Updated the 
  Windows 
  project file to invoke these tools from the standard location. ACPICA BZ 
  904. 
  Versions supported:
      Flex for Windows:  V2.5.4
      Bison for Windows: V2.4.1
  
  ----------------------------------------
  15 February 2012. Summary of changes for version 20120215:
  
  
  1) ACPICA Core Subsystem:
  
  There have been some major changes to the sleep/wake support code, as 
  described below (a - e).
  
  a) The AcpiLeaveSleepState has been split into two interfaces, similar to 
  AcpiEnterSleepStatePrep and AcpiEnterSleepState. The new interface is 
  AcpiLeaveSleepStatePrep. This allows the host to perform actions between 
  the 
  time the _BFS method is called and the _WAK method is called. NOTE: all 
  hosts 
  must update their wake/resume code or else sleep/wake will not work 
  properly. 
  Rafael Wysocki.
  
  b) In AcpiLeaveSleepState, now enable all runtime GPEs before calling the 
  _WAK 
  method. Some machines require that the GPEs are enabled before the _WAK 
  method 
  is executed. Thomas Renninger.
  
  c) In AcpiLeaveSleepState, now always clear the WAK_STS (wake status) 
  bit. 
  Some BIOS code assumes that WAK_STS will be cleared on resume and use it 
  to 
  determine whether the system is rebooting or resuming. Matthew Garrett.
  
  d) Move the invocations of _GTS (Going To Sleep) and _BFS (Back From 
  Sleep) to 
  match the ACPI specification requirement. Rafael Wysocki.
  
  e) Implemented full support for the ACPI 5.0 SleepStatus and SleepControl 
  registers within the V5 FADT. This support adds two new files: 
  hardware/hwesleep.c implements the support for the new registers. Moved 
  all 
  sleep/wake external interfaces to hardware/hwxfsleep.c.
  
  
  Added a new OSL interface for ACPI table overrides, 
  AcpiOsPhysicalTableOverride. This interface allows the host to override a 
  table via a physical address, instead of the logical address required by 
  AcpiOsTableOverride. This simplifies the host implementation. Initial 
  implementation by Thomas Renninger. The ACPICA implementation creates a 
  single 
  shared function for table overrides that attempts both a logical and a 
  physical override.
  
  Expanded the OSL memory read/write interfaces to 64-bit data 
  (AcpiOsReadMemory, AcpiOsWriteMemory.) This enables full 64-bit memory 
  transfer support for GAS register structures passed to AcpiRead and 
  AcpiWrite.
  
  Implemented the ACPI_REDUCED_HARDWARE option to allow the creation of a 
  custom 
  build of ACPICA that supports only the ACPI 5.0 reduced hardware (SoC) 
  model. 
  See the ACPICA reference for details. ACPICA BZ 942. This option removes 
  about 
  10% of the code and 5% of the static data, and the following hardware 
  ACPI 
  features become unavailable:
      PM Event and Control registers
      SCI interrupt (and handler)
      Fixed Events
      General Purpose Events (GPEs)
      Global Lock
      ACPI PM timer
      FACS table (Waking vectors and Global Lock)
  
  Updated the unix tarball directory structure to match the ACPICA git 
  source 
  tree. This ensures that the generic unix makefiles work properly (in 
  generate/unix).  Also updated the Linux makefiles to match. ACPICA BZ 
  867.
  
  Updated the return value of the _REV predefined method to integer value 5 
  to 
  reflect ACPI 5.0 support.
  
  Moved the external ACPI PM timer interface prototypes to the public 
  acpixf.h 
  file where they belong.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug 
  version of the code includes the debug output trace mechanism and has a 
  much 
  larger code and data size.
  
    Previous Release:
      Non-Debug Version:  92.8K Code, 24.9K Data, 117.7K Total
      Debug Version:     171.7K Code, 72.9K Data, 244.5K Total
    Current Release:
      Non-Debug Version:  93.0K Code, 25.0K Data, 118.0K Total
      Debug Version:     172.5K Code, 73.2K Data, 245.7K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  Disassembler: Fixed a problem with the new ACPI 5.0 serial resource 
  descriptors (I2C, SPI, UART) where the resource produce/consumer bit was 
  incorrectly displayed.
  
  AcpiHelp: Add display of ACPI/PNP device IDs that are defined in the ACPI 
  specification.
  
  ----------------------------------------
  11 January 2012. Summary of changes for version 20120111:
  
  
  1) ACPICA Core Subsystem:
  
  Implemented a new mechanism to allow host device drivers to check for 
  address 
  range conflicts with ACPI Operation Regions. Both SystemMemory and 
  SystemIO 
  address spaces are supported. A new external interface, 
  AcpiCheckAddressRange, 
  allows drivers to check an address range against the ACPI namespace. See 
  the 
  ACPICA reference for additional details. Adds one new file, 
  utilities/utaddress.c. Lin Ming, Bob Moore.
  
  Fixed several issues with the ACPI 5.0 FADT support: Add the sleep 
  Control 
  and 
  Status registers, update the ACPI 5.0 flags, and update internal data 
  structures to handle an FADT larger than 256 bytes. The size of the ACPI 
  5.0 
  FADT is 268 bytes.
  
  Updated all ACPICA copyrights and signons to 2012. Added the 2012 
  copyright to 
  all module headers and signons, including the standard Linux header. This 
  affects virtually every file in the ACPICA core subsystem, iASL compiler, 
  and 
  all ACPICA utilities.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug 
  version of the code includes the debug output trace mechanism and has a 
  much 
  larger code and data size.
  
    Previous Release:
      Non-Debug Version:  92.3K Code, 24.9K Data, 117.2K Total
      Debug Version:     170.8K Code, 72.6K Data, 243.4K Total
    Current Release:
      Non-Debug Version:  92.8K Code, 24.9K Data, 117.7K Total
      Debug Version:     171.7K Code, 72.9K Data, 244.5K Total
  
  
  2) iASL Compiler/Disassembler and Tools:
  
  Disassembler: fixed a problem with the automatic resource tag generation 
  support. Fixes a problem where the resource tags are inadvertently not 
  constructed if the table being disassembled contains external references 
  to 
  control methods. Moved the actual construction of the tags to after the 
  final 
  namespace is constructed (after 2nd parse is invoked due to external 
  control 
  method references.) ACPICA BZ 941.
  
  Table Compiler: Make all "generic" operators caseless. These are the 
  operators 
  like UINT8, String, etc. Making these caseless improves ease-of-use. 
  ACPICA BZ 
  934.
  
  ----------------------------------------
  23 November 2011. Summary of changes for version 20111123:
  
  0) ACPI 5.0 Support:
  
  This release contains full support for the ACPI 5.0 specification, as 
  summarized below.
  
  Reduced Hardware Support:
  -------------------------
  
  This support allows for ACPI systems without the usual ACPI hardware. 
  This 
  support is enabled by a flag in the revision 5 FADT. If it is set, ACPICA 
  will 
  not attempt to initialize or use any of the usual ACPI hardware. Note, 
  when 
  this flag is set, all of the following ACPI hardware is assumed to be not 
  present and is not initialized or accessed:
  
      General Purpose Events (GPEs)
      Fixed Events (PM1a/PM1b and PM Control)
      Power Management Timer and Console Buttons (power/sleep)
      Real-time Clock Alarm
      Global Lock
      System Control Interrupt (SCI)
      The FACS is assumed to be non-existent
  
  ACPI Tables:
  ------------
  
  All new tables and updates to existing tables are fully supported in the 
  ACPICA headers (for use by device drivers), the disassembler, and the 
  iASL 
  Data Table Compiler. ACPI 5.0 defines these new tables:
  
      BGRT        /* Boot Graphics Resource Table */
      DRTM        /* Dynamic Root of Trust for Measurement table */
      FPDT        /* Firmware Performance Data Table */
      GTDT        /* Generic Timer Description Table */
      MPST        /* Memory Power State Table */
      PCCT        /* Platform Communications Channel Table */
      PMTT        /* Platform Memory Topology Table */
      RASF        /* RAS Feature table */
  
  Operation Regions/SpaceIDs:
  ---------------------------
  
  All new operation regions are fully supported by the iASL compiler, the 
  disassembler, and the ACPICA runtime code (for dispatch to region 
  handlers.) 
  The new operation region Space IDs are:
  
      GeneralPurposeIo
      GenericSerialBus
  
  Resource Descriptors:
  ---------------------
  
  All new ASL resource descriptors are fully supported by the iASL 
  compiler, 
  the 
  ASL/AML disassembler, and the ACPICA runtime Resource Manager code 
  (including 
  all new predefined resource tags). New descriptors are:
  
      FixedDma
      GpioIo
      GpioInt
      I2cSerialBus
      SpiSerialBus
      UartSerialBus
  
  ASL/AML Operators, New and Modified:
  ------------------------------------
  
  One new operator is added, the Connection operator, which is used to 
  associate 
  a GeneralPurposeIo or GenericSerialBus resource descriptor with 
  individual 
  field objects within an operation region. Several new protocols are 
  associated 
  with the AccessAs operator. All are fully supported by the iASL compiler, 
  disassembler, and runtime ACPICA AML interpreter:
  
      Connection                      // Declare Field Connection 
  attributes
      AccessAs: AttribBytes (n)           // Read/Write N-Bytes Protocol
      AccessAs: AttribRawBytes (n)        // Raw Read/Write N-Bytes 
  Protocol
      AccessAs: AttribRawProcessBytes (n) // Raw Process Call Protocol
      RawDataBuffer                       // Data type for Vendor Data 
  fields
  
  Predefined ASL/AML Objects:
  ---------------------------
  
  All new predefined objects/control-methods are supported by the iASL 
  compiler 
  and the ACPICA runtime validation/repair (arguments and return values.) 
  New 
  predefined names include the following:
  
  Standard Predefined Names (Objects or Control Methods):
      _AEI, _CLS, _CPC, _CWS, _DEP,
      _DLM, _EVT, _GCP, _CRT, _GWS,
      _HRV, _PRE, _PSE, _SRT, _SUB.
  
  Resource Tags (Names used to access individual fields within resource 
  descriptors):
      _DBT, _DPL, _DRS, _END, _FLC,
      _IOR, _LIN, _MOD, _PAR, _PHA,
      _PIN, _PPI, _POL, _RXL, _SLV,
      _SPE, _STB, _TXL, _VEN.
  
  ACPICA External Interfaces:
  ---------------------------
  
  Several new interfaces have been defined for use by ACPI-related device 
  drivers and other host OS services:
  
  AcpiAcquireMutex and AcpiReleaseMutex: These interfaces allow the host OS 
  to 
  acquire and release AML mutexes that are defined in the DSDT/SSDT tables 
  provided by the BIOS. They are intended to be used in conjunction with 
  the 
  ACPI 5.0 _DLM (Device Lock Method) in order to provide transaction-level 
  mutual exclusion with the AML code/interpreter.
  
  AcpiGetEventResources: Returns the (formatted) resource descriptors as 
  defined 
  by the ACPI 5.0 _AEI object (ACPI Event Information).  This object 
  provides 
  resource descriptors associated with hardware-reduced platform events, 
  similar 
  to the AcpiGetCurrentResources interface.
  
  Operation Region Handlers: For General Purpose IO and Generic Serial Bus 
  operation regions, information about the Connection() object and any 
  optional 
  length information is passed to the region handler within the Context 
  parameter.
  
  AcpiBufferToResource: This interface converts a raw AML buffer containing 
  a 
  resource template or resource descriptor to the ACPI_RESOURCE internal 
  format 
  suitable for use by device drivers. Can be used by an operation region 
  handler 
  to convert the Connection() buffer object into a ACPI_RESOURCE.
  
  Miscellaneous/Tools/TestSuites: 
  -------------------------------
  
  Support for extended _HID names (Four alpha characters instead of three).
  Support for ACPI 5.0 features in the AcpiExec and AcpiHelp utilities.
  Support for ACPI 5.0 features in the ASLTS test suite.
  Fully updated documentation (ACPICA and iASL reference documents.)
  
  ACPI Table Definition Language:
  -------------------------------
  
  Support for this language was implemented and released as a subsystem of 
  the 
  iASL compiler in 2010. (See the iASL compiler User Guide.)
  
  
  Non-ACPI 5.0 changes for this release:
  --------------------------------------
  
  1) ACPICA Core Subsystem:
  
  Fix a problem with operation region declarations where a failure can 
  occur 
  if 
  the region name and an argument that evaluates to an object (such as the 
  region address) are in different namespace scopes. Lin Ming, ACPICA BZ 
  937.
  
  Do not abort an ACPI table load if an invalid space ID is found within. 
  This 
  will be caught later if the offending method is executed. ACPICA BZ 925.
  
  Fixed an issue with the FFixedHW space ID where the ID was not always 
  recognized properly (Both ACPICA and iASL). ACPICA BZ 926.
  
  Fixed a problem with the 32-bit generation of the unix-specific OSL 
  (osunixxf.c). Lin Ming, ACPICA BZ 936.
  
  Several changes made to enable generation with the GCC 4.6 compiler. 
  ACPICA BZ 
  935.
  
  New error messages: Unsupported I/O requests (not 8/16/32 bit), and 
  Index/Bank 
  field registers out-of-range.
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Implemented the __PATH__ operator, which returns the full pathname 
  of 
  the current source file.
  
  AcpiHelp: Automatically display expanded keyword information for all ASL 
  operators.
  
  Debugger: Add "Template" command to disassemble/dump resource template 
  buffers.
  
  Added a new master script to generate and execute the ASLTS test suite. 
  Automatically handles 32- and 64-bit generation. See tests/aslts.sh
  
  iASL: Fix problem with listing generation during processing of the 
  Switch() 
  operator where AML listing was disabled until the entire Switch block was 
  completed.
  
  iASL: Improve support for semicolon statement terminators. Fix "invalid 
  character" message for some cases when the semicolon is used. Semicolons 
  are 
  now allowed after every <Term> grammar element. ACPICA BZ 927.
  
  iASL: Fixed some possible aliasing warnings during generation. ACPICA BZ 
  923.
  
  Disassembler: Fix problem with disassembly of the DataTableRegion 
  operator 
  where an inadvertent "Unhandled deferred opcode" message could be 
  generated.
  
  3) Example Code and Data Size
  
  These are the sizes for the OS-independent acpica.lib produced by the 
  Microsoft Visual C++ 9.0 32-bit compiler. The debug version of the code 
  includes the debug output trace mechanism and has a much larger code and 
  data 
  size.
  
    Previous Release:
      Non-Debug Version:  90.2K Code, 23.9K Data, 114.1K Total
      Debug Version:     165.6K Code, 68.4K Data, 234.0K Total
    Current Release:
      Non-Debug Version:  92.3K Code, 24.9K Data, 117.2K Total
      Debug Version:     170.8K Code, 72.6K Data, 243.4K Total
  
  ----------------------------------------
  22 September 2011. Summary of changes for version 20110922:
  
  0) ACPI 5.0 News:
  
  Support for ACPI 5.0 in ACPICA has been underway for several months and 
  will 
  be released at the same time that ACPI 5.0 is officially released.
  
  The ACPI 5.0 specification is on track for release in the next few 
  months.
   
  1) ACPICA Core Subsystem:
  
  Fixed a problem where the maximum sleep time for the Sleep() operator was 
  intended to be limited to two seconds, but was inadvertently limited to 
  20 
  seconds instead.
  
  Linux and Unix makefiles: Added header file dependencies to ensure 
  correct 
  generation of ACPICA core code and utilities. Also simplified the 
  makefiles 
  considerably through the use of the vpath variable to specify search 
  paths. 
  ACPICA BZ 924.
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Implemented support to check the access length for all fields 
  created to 
  access named Resource Descriptor fields. For example, if a resource field 
  is 
  defined to be two bits, a warning is issued if a CreateXxxxField() is 
  used 
  with an incorrect bit length. This is implemented for all current 
  resource 
  descriptor names. ACPICA BZ 930.
    
  Disassembler: Fixed a byte ordering problem with the output of 24-bit and 
  56-
  bit integers.
  
  iASL: Fixed a couple of issues associated with variable-length package 
  objects. 1) properly handle constants like One, Ones, Zero -- do not make 
  a 
  VAR_PACKAGE when these are used as a package length. 2) Allow the 
  VAR_PACKAGE 
  opcode (in addition to PACKAGE) when validating object types for 
  predefined 
  names.
  
  iASL: Emit statistics for all output files (instead of just the ASL input 
  and 
  AML output). Includes listings, hex files, etc.
  
  iASL: Added -G option to the table compiler to allow the compilation of 
  custom 
  ACPI tables. The only part of a table that is required is the standard 
  36-
  byte 
  ACPI header.
  
  AcpiXtract: Ported to the standard ACPICA environment (with ACPICA 
  headers), 
  which also adds correct 64-bit support. Also, now all output filenames 
  are 
  completely lower case.
  
  AcpiExec: Ignore any non-AML tables (tables other than DSDT or SSDT) when 
  loading table files. A warning is issued for any such tables. The only 
  exception is an FADT. This also fixes a possible fault when attempting to 
  load 
  non-AML tables. ACPICA BZ 932.
  
  AcpiHelp: Added the AccessAs and Offset operators. Fixed a problem where 
  a 
  missing table terminator could cause a fault when using the -p option.
  
  AcpiSrc: Fixed a possible divide-by-zero fault when generating file 
  statistics.
  
  3) Example Code and Data Size
  
  These are the sizes for the OS-independent acpica.lib produced by the 
  Microsoft Visual C++ 9.0 32-bit compiler. The debug version of the code 
  includes the debug output trace mechanism and has a much larger code and 
  data 
  size.
  
    Previous Release (VC 9.0):
      Non-Debug Version:  90.2K Code, 23.9K Data, 114.1K Total
      Debug Version:     165.6K Code, 68.4K Data, 234.0K Total
    Current Release (VC 9.0):
      Non-Debug Version:  90.2K Code, 23.9K Data, 114.1K Total
      Debug Version:     165.6K Code, 68.4K Data, 234.0K Total
  
  
  ----------------------------------------
  23 June 2011. Summary of changes for version 20110623:
  
  1) ACPI CA Core Subsystem:
  
  Updated the predefined name repair mechanism to not attempt repair of a 
  _TSS 
  return object if a _PSS object is present. We can only sort the _TSS 
  return 
  package if there is no _PSS within the same scope. This is because if 
  _PSS 
  is 
  present, the ACPI specification dictates that the _TSS Power Dissipation 
  field 
  is to be ignored, and therefore some BIOSs leave garbage values in the 
  _TSS 
  Power field(s). In this case, it is best to just return the _TSS package 
  as-
  is. Reported by, and fixed with assistance from Fenghua Yu.
  
  Added an option to globally disable the control method return value 
  validation 
  and repair. This runtime option can be used to disable return value 
  repair 
  if 
  this is causing a problem on a particular machine. Also added an option 
  to 
  AcpiExec (-dr) to set this disable flag.
  
  All makefiles and project files: Major changes to improve generation of 
  ACPICA 
  tools. ACPICA BZ 912:
      Reduce default optimization levels to improve compatibility
      For Linux, add strict-aliasing=0 for gcc 4
      Cleanup and simplify use of command line defines
      Cleanup multithread library support
      Improve usage messages
  
  Linux-specific header: update handling of THREAD_ID and pthread. For the 
  32-
  bit case, improve casting to eliminate possible warnings, especially with 
  the 
  acpica tools.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug 
  version of the code includes the debug output trace mechanism and has a 
  much 
  larger code and data size.
  
    Previous Release (VC 9.0):
      Non-Debug Version:  90.1K Code, 23.9K Data, 114.0K Total
      Debug Version:     165.6K Code, 68.4K Data, 234.0K Total
    Current Release (VC 9.0):
      Non-Debug Version:  90.2K Code, 23.9K Data, 114.1K Total
      Debug Version:     165.6K Code, 68.4K Data, 234.0K Total
  
  2) iASL Compiler/Disassembler and Tools:
  
  With this release, a new utility named "acpihelp" has been added to the 
  ACPICA 
  package. This utility summarizes the ACPI specification chapters for the 
  ASL 
  and AML languages. It generates under Linux/Unix as well as Windows, and 
  provides the following functionality:
      Find/display ASL operator(s) -- with description and syntax.
      Find/display ASL keyword(s) -- with exact spelling and descriptions.
      Find/display ACPI predefined name(s) -- with description, number
          of arguments, and the return value data type.
      Find/display AML opcode name(s) -- with opcode, arguments, and 
  grammar.
      Decode/display AML opcode -- with opcode name, arguments, and 
  grammar.
  
  Service Layers: Make multi-thread support configurable. Conditionally 
  compile 
  the multi-thread support so that threading libraries will not be linked 
  if 
  not 
  necessary. The only tool that requires multi-thread support is AcpiExec.
  
  iASL: Update yyerrror/AslCompilerError for "const" errors. Newer versions 
  of 
  Bison appear to want the interface to yyerror to be a const char * (or at 
  least this is a problem when generating iASL on some systems.) ACPICA BZ 
  923 
  Pierre Lejeune.
  
  Tools: Fix for systems where O_BINARY is not defined. Only used for 
  Windows 
  versions of the tools.
  
  ----------------------------------------
  27 May 2011. Summary of changes for version 20110527:
  
  1) ACPI CA Core Subsystem:
  
  ASL Load() operator: Reinstate most restrictions on the incoming ACPI 
  table 
  signature. Now, only allow SSDT, OEMx, and a null signature. History:
      1) Originally, we checked the table signature for "SSDT" or "PSDT".
         (PSDT is now obsolete.)
      2) We added support for OEMx tables, signature "OEM" plus a fourth
         "don't care" character.
      3) Valid tables were encountered with a null signature, so we just
         gave up on validating the signature, (05/2008).
      4) We encountered non-AML tables such as the MADT, which caused
         interpreter errors and kernel faults. So now, we once again allow
         only SSDT, OEMx, and now, also a null signature. (05/2011).
  
  Added the missing _TDL predefined name to the global name list in order 
  to 
  enable validation. Affects both the core ACPICA code and the iASL 
  compiler.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug 
  version of the code includes the debug output trace mechanism and has a 
  much 
  larger code and data size.
  
    Previous Release (VC 9.0):
      Non-Debug Version:  90.0K Code, 23.8K Data, 113.8K Total
      Debug Version:     164.5K Code, 68.0K Data, 232.5K Total
    Current Release (VC 9.0):
      Non-Debug Version:  90.1K Code, 23.9K Data, 114.0K Total
      Debug Version:     165.6K Code, 68.4K Data, 234.0K Total
  
  2) iASL Compiler/Disassembler and Tools:
  
  Debugger/AcpiExec: Implemented support for "complex" method arguments on 
  the 
  debugger command line. This adds support beyond simple integers -- 
  including 
  Strings, Buffers, and Packages. Includes support for nested packages. 
  Increased the default command line buffer size to accommodate these 
  arguments. 
  See the ACPICA reference for details and syntax. ACPICA BZ 917.
   
  Debugger/AcpiExec: Implemented support for "default" method arguments for 
  the 
  Execute/Debug command. Now, the debugger will always invoke a control 
  method 
  with the required number of arguments -- even if the command line 
  specifies 
  none or insufficient arguments. It uses default integer values for any 
  missing 
  arguments. Also fixes a bug where only six method arguments maximum were 
  supported instead of the required seven.
  
  Debugger/AcpiExec: Add a maximum buffer length parameter to AcpiOsGetLine 
  and 
  also return status in order to prevent buffer overruns. See the ACPICA 
  reference for details and syntax. ACPICA BZ 921
  
  iASL: Cleaned up support for Berkeley yacc. A general cleanup of code and 
  makefiles to simplify support for the two different but similar parser 
  generators, bison and yacc.
  
  Updated the generic unix makefile for gcc 4. The default gcc version is 
  now 
  expected to be 4 or greater, since options specific to gcc 4 are used.
  
  ----------------------------------------
  13 April 2011. Summary of changes for version 20110413:
  
  1) ACPI CA Core Subsystem:
  
  Implemented support to execute a so-called "orphan" _REG method under the 
  EC 
  device. This change will force the execution of a _REG method underneath 
  the 
  EC 
  device even if there is no corresponding operation region of type 
  EmbeddedControl. Fixes a problem seen on some machines and apparently is 
  compatible with Windows behavior. ACPICA BZ 875.
  
  Added more predefined methods that are eligible for automatic NULL 
  package 
  element removal. This change adds another group of predefined names to 
  the 
  list 
  of names that can be repaired by having NULL package elements dynamically 
  removed. This group are those methods that return a single variable-
  length 
  package containing simple data types such as integers, buffers, strings. 
  This 
  includes: _ALx, _BCL, _CID,_ DOD, _EDL, _FIX, _PCL, _PLD, _PMD, _PRx, 
  _PSL, 
  _Sx, 
  and _TZD. ACPICA BZ 914.
  
  Split and segregated all internal global lock functions to a new file, 
  evglock.c.
  
  Updated internal address SpaceID for DataTable regions. Moved this 
  internal 
  space 
  id in preparation for ACPI 5.0 changes that will include some new space 
  IDs. 
  This 
  change should not affect user/host code.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib 
  produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug 
  version of 
  the code includes the debug output trace mechanism and has a much larger 
  code 
  and 
  data size.
  
    Previous Release (VC 9.0):
      Non-Debug Version:  89.8K Code, 23.8K Data, 113.6K Total
      Debug Version:     164.2K Code, 67.9K Data, 232.1K Total
    Current Release (VC 9.0):
      Non-Debug Version:  90.0K Code, 23.8K Data, 113.8K Total
      Debug Version:     164.5K Code, 68.0K Data, 232.5K Total
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL/DTC: Major update for new grammar features. Allow generic data types 
  in 
  custom ACPI tables. Field names are now optional. Any line can be split 
  to 
  multiple lines using the continuation char (\). Large buffers now use 
  line-
  continuation character(s) and no colon on the continuation lines. See the 
  grammar 
  update in the iASL compiler reference. ACPI BZ 910,911. Lin Ming, Bob 
  Moore.
  
  iASL: Mark ASL "Return()" and the simple "Return" as "Null" return 
  statements. 
  Since the parser stuffs a "zero" as the return value for these statements 
  (due 
  to 
  the underlying AML grammar), they were seen as "return with value" by the 
  iASL 
  semantic checking. They are now seen correctly as "null" return 
  statements.
  
  iASL: Check if a_REG declaration has a corresponding Operation Region. 
  Adds a 
  check for each _REG to ensure that there is in fact a corresponding 
  operation 
  region declaration in the same scope. If not, the _REG method is not very 
  useful 
  since it probably won't be executed. ACPICA BZ 915.
  
  iASL/DTC: Finish support for expression evaluation. Added a new 
  expression 
  parser 
  that implements c-style operator precedence and parenthesization. ACPICA 
  bugzilla 
  908.
  
  Disassembler/DTC: Remove support for () and <> style comments in data 
  tables. 
  Now 
  that DTC has full expression support, we don't want to have comment 
  strings 
  that 
  start with a parentheses or a less-than symbol. Now, only the standard /* 
  and 
  // 
  comments are supported, as well as the bracket [] comments.
  
  AcpiXtract: Fix for RSDP and dynamic SSDT extraction. These tables have 
  "unusual" 
  headers in the acpidump file. Update the header validation to support 
  these 
  tables. Problem introduced in previous AcpiXtract version in the change 
  to 
  support "wrong checksum" error messages emitted by acpidump utility.
  
  iASL: Add a * option to generate all template files (as a synonym for 
  ALL) 
  as 
  in 
  "iasl -T *" or "iasl -T ALL".
  
  iASL/DTC: Do not abort compiler on fatal errors. We do not want to 
  completely 
  abort the compiler on "fatal" errors, simply should abort the current 
  compile. 
  This allows multiple compiles with a single (possibly wildcard) compiler 
  invocation.
  
  ----------------------------------------
  16 March 2011. Summary of changes for version 20110316:
  
  1) ACPI CA Core Subsystem:
  
  Fixed a problem caused by a _PRW method appearing at the namespace root 
  scope 
  during the setup of wake GPEs. A fault could occur if a _PRW directly 
  under 
  the 
  root object was passed to the AcpiSetupGpeForWake interface. Lin Ming.
  
  Implemented support for "spurious" Global Lock interrupts. On some 
  systems, a 
  global lock interrupt can occur without the pending flag being set. Upon 
  a 
  GL 
  interrupt, we now ensure that a thread is actually waiting for the lock 
  before 
  signaling GL availability. Rafael Wysocki, Bob Moore.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib 
  produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug 
  version of 
  the code includes the debug output trace mechanism and has a much larger 
  code 
  and 
  data size.
  
    Previous Release (VC 9.0):
      Non-Debug Version:  89.7K Code, 23.7K Data, 113.4K Total
      Debug Version:     163.9K Code, 67.5K Data, 231.4K Total
    Current Release (VC 9.0):
      Non-Debug Version:  89.8K Code, 23.8K Data, 113.6K Total
      Debug Version:     164.2K Code, 67.9K Data, 232.1K Total
  
  2) iASL Compiler/Disassembler and Tools:
  
  Implemented full support for the "SLIC" ACPI table. Includes support in 
  the 
  header files, disassembler, table compiler, and template generator. Bob 
  Moore, 
  Lin Ming.
  
  AcpiXtract: Correctly handle embedded comments and messages from 
  AcpiDump. 
  Apparently some or all versions of acpidump will occasionally emit a 
  comment 
  like 
  "Wrong checksum", etc., into the dump file. This was causing problems for 
  AcpiXtract. ACPICA BZ 905.
  
  iASL: Fix the Linux makefile by removing an inadvertent double file 
  inclusion. 
  ACPICA BZ 913.
  
  AcpiExec: Update installation of operation region handlers. Install one 
  handler 
  for a user-defined address space. This is used by the ASL test suite 
  (ASLTS).
  
  ----------------------------------------
  11 February 2011. Summary of changes for version 20110211:
  
  1) ACPI CA Core Subsystem:
  
  Added a mechanism to defer _REG methods for some early-installed 
  handlers. 
  Most user handlers should be installed before call to 
  AcpiEnableSubsystem. 
  However, Event handlers and region handlers should be installed after 
  AcpiInitializeObjects. Override handlers for the "default" regions should 
  be 
  installed early, however. This change executes all _REG methods for the 
  default regions (Memory/IO/PCI/DataTable) simultaneously to prevent any 
  chicken/egg issues between them. ACPICA BZ 848.
  
  Implemented an optimization for GPE detection. This optimization will 
  simply 
  ignore GPE registers that contain no enabled GPEs -- there is no need to 
  read the register since this information is available internally. This 
  becomes more important on machines with a large GPE space. ACPICA 
  bugzilla 
  884. Lin Ming. Suggestion from Joe Liu.
  
  Removed all use of the highly unreliable FADT revision field. The 
  revision 
  number in the FADT has been found to be completely unreliable and cannot 
  be 
  trusted. Only the actual table length can be used to infer the version. 
  This 
  change updates the ACPICA core and the disassembler so that both no 
  longer 
  even look at the FADT version and instead depend solely upon the FADT 
  length.
  
  Fix an unresolved name issue for the no-debug and no-error-message source 
  generation cases. The _AcpiModuleName was left undefined in these cases, 
  but 
  it is actually needed as a parameter to some interfaces. Define 
  _AcpiModuleName as a null string in these cases. ACPICA Bugzilla 888.
  
  Split several large files (makefiles and project files updated)
    utglobal.c   -> utdecode.c
    dbcomds.c    -> dbmethod.c dbnames.c
    dsopcode.c   -> dsargs.c dscontrol.c
    dsload.c     -> dsload2.c
    aslanalyze.c -> aslbtypes.c aslwalks.c
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has 
  a much larger code and data size.
  
    Previous Release (VC 9.0):
      Non-Debug Version:  89.7K Code, 23.7K Data, 113.4K Total
      Debug Version:     163.9K Code, 67.5K Data, 231.4K Total
    Current Release (VC 9.0):
      Non-Debug Version:  89.7K Code, 23.7K Data, 113.4K Total
      Debug Version:     163.9K Code, 67.5K Data, 231.4K Total
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Implemented the predefined macros __LINE__, __FILE__, and __DATE__. 
  These are useful C-style macros with the standard definitions. ACPICA 
  bugzilla 898.
  
  iASL/DTC: Added support for integer expressions and labels. Support for 
  full 
  expressions for all integer fields in all ACPI tables. Support for labels 
  in 
  "generic" portions of tables such as UEFI. See the iASL reference manual.
  
  Debugger: Added a command to display the status of global handlers. The 
  "handlers" command will display op region, fixed event, and miscellaneous 
  global handlers. installation status -- and for op regions, whether 
  default 
  or user-installed handler will be used.
  
  iASL: Warn if reserved method incorrectly returns a value. Many 
  predefined 
  names are defined such that they do not return a value. If implemented as 
  a 
  method, issue a warning if such a name explicitly returns a value. ACPICA 
  Bugzilla 855.
  
  iASL: Added detection of GPE method name conflicts. Detects a conflict 
  where 
  there are two GPE methods of the form _Lxy and _Exy in the same scope. 
  (For 
  example, _L1D and _E1D in the same scope.) ACPICA bugzilla 848.
  
  iASL/DTC: Fixed a couple input scanner issues with comments and line 
  numbers. Comment remover could get confused and miss a comment ending. 
  Fixed 
  a problem with line counter maintenance.
  
  iASL/DTC: Reduced the severity of some errors from fatal to error. There 
  is 
  no need to abort on simple errors within a field definition.
  
  Debugger: Simplified the output of the help command. All help output now 
  in 
  a single screen, instead of help subcommands. ACPICA Bugzilla 897.
  
  ----------------------------------------
  12 January 2011. Summary of changes for version 20110112:
  
  1) ACPI CA Core Subsystem:
  
  Fixed a race condition between method execution and namespace walks that 
  can 
  possibly cause a fault. The problem was apparently introduced in version 
  20100528 as a result of a performance optimization that reduces the 
  number 
  of 
  namespace walks upon method exit by using the delete_namespace_subtree 
  function instead of the delete_namespace_by_owner function used 
  previously. 
  Bug is a missing namespace lock in the delete_namespace_subtree function. 
  dana.myers@oracle.com
  
  Fixed several issues and a possible fault with the automatic "serialized" 
  method support. History: This support changes a method to "serialized" on 
  the 
  fly if the method generates an AE_ALREADY_EXISTS error, indicating the 
  possibility that it cannot handle reentrancy. This fix repairs a couple 
  of 
  issues seen in the field, especially on machines with many cores:
  
      1) Delete method children only upon the exit of the last thread,
         so as to not delete objects out from under other running threads
        (and possibly causing a fault.)
      2) Set the "serialized" bit for the method only upon the exit of the
         Last thread, so as to not cause deadlock when running threads
         attempt to exit.
      3) Cleanup the use of the AML "MethodFlags" and internal method flags
         so that there is no longer any confusion between the two.
  
      Lin Ming, Bob Moore. Reported by dana.myers@oracle.com.
  
  Debugger: Now lock the namespace for duration of a namespace dump. 
  Prevents 
  issues if the namespace is changing dynamically underneath the debugger. 
  Especially affects temporary namespace nodes, since the debugger displays 
  these also.
  
  Updated the ordering of include files. The ACPICA headers should appear 
  before any compiler-specific headers (stdio.h, etc.) so that acenv.h can 
  set 
  any necessary compiler-specific defines, etc. Affects the ACPI-related 
  tools 
  and utilities.
  
  Updated all ACPICA copyrights and signons to 2011. Added the 2011 
  copyright 
  to all module headers and signons, including the Linux header. This 
  affects 
  virtually every file in the ACPICA core subsystem, iASL compiler, and all 
  utilities.
  
  Added project files for MS Visual Studio 2008 (VC++ 9.0). The original 
  project files for VC++ 6.0 are now obsolete. New project files can be 
  found 
  under acpica/generate/msvc9. See acpica/generate/msvc9/readme.txt for 
  details.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a 
  much larger code and data size.
  
    Previous Release (VC 6.0):
      Non-Debug Version:  89.8K Code, 18.9K Data, 108.7K Total
      Debug Version:     166.6K Code, 52.1K Data, 218.7K Total
    Current Release (VC 9.0):
      Non-Debug Version:  89.7K Code, 23.7K Data, 113.4K Total
      Debug Version:     163.9K Code, 67.5K Data, 231.4K Total
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Added generic data types to the Data Table compiler. Add "generic" 
  data 
  types such as UINT32, String, Unicode, etc., to simplify the generation 
  of 
  platform-defined tables such as UEFI. Lin Ming.
  
  iASL: Added listing support for the Data Table Compiler. Adds listing 
  support 
  (-l) to display actual binary output for each line of input code.
  
  ----------------------------------------
  09 December 2010. Summary of changes for version 20101209:
  
  1) ACPI CA Core Subsystem:
  
  Completed the major overhaul of the GPE support code that was begun in 
  July 
  2010. Major features include: removal of _PRW execution in ACPICA (host 
  executes _PRWs anyway), cleanup of "wake" GPE interfaces and processing, 
  changes to existing interfaces, simplification of GPE handler operation, 
  and 
  a handful of new interfaces:
  
      AcpiUpdateAllGpes
      AcpiFinishGpe
      AcpiSetupGpeForWake
      AcpiSetGpeWakeMask
      One new file, evxfgpe.c to consolidate all external GPE interfaces.
  
  See the ACPICA Programmer Reference for full details and programming 
  information. See the new section 4.4 "General Purpose Event (GPE) 
  Support" 
  for a full overview, and section 8.7 "ACPI General Purpose Event 
  Management" 
  for programming details. ACPICA BZ 858,870,877. Matthew Garrett, Lin 
  Ming, 
  Bob Moore, Rafael Wysocki.
  
  Implemented a new GPE feature for Windows compatibility, the "Implicit 
  Wake 
  GPE Notify". This feature will automatically issue a Notify(2) on a 
  device 
  when a Wake GPE is received if there is no corresponding GPE method or 
  handler. ACPICA BZ 870.
  
  Fixed a problem with the Scope() operator during table parse and load 
  phase. 
  During load phase (table load or method execution), the scope operator 
  should 
  not enter the target into the namespace. Instead, it should open a new 
  scope 
  at the target location. Linux BZ 19462, ACPICA BZ 882.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a 
  much larger code and data size.
  
    Previous Release:
      Non-Debug Version:  89.8K Code, 18.9K Data, 108.7K Total
      Debug Version:     166.6K Code, 52.1K Data, 218.7K Total
    Current Release:
      Non-Debug Version:  89.9K Code, 19.0K Data, 108.9K Total
      Debug Version:     166.3K Code, 52.1K Data, 218.4K Total
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Relax the alphanumeric restriction on _CID strings. These strings 
  are 
  "bus-specific" per the ACPI specification, and therefore any characters 
  are 
  acceptable. The only checks that can be performed are for a null string 
  and 
  perhaps for a leading asterisk. ACPICA BZ 886.
  
  iASL: Fixed a problem where a syntax error that caused a premature EOF 
  condition on the source file emitted a very confusing error message. The 
  premature EOF is now detected correctly. ACPICA BZ 891.
  
  Disassembler: Decode the AccessSize within a Generic Address Structure 
  (byte 
  access, word access, etc.) Note, this field does not allow arbitrary bit 
  access, the size is encoded as 1=byte, 2=word, 3=dword, and 4=qword.
  
  New: AcpiNames utility - Example namespace dump utility. Shows an example 
  of 
  ACPICA configuration for a minimal namespace dump utility. Uses table and 
  namespace managers, but no AML interpreter. Does not add any 
  functionality 
  over AcpiExec, it is a subset of AcpiExec. The purpose is to show how to 
  partition and configure ACPICA. ACPICA BZ 883.
  
  AML Debugger: Increased the debugger buffer size for method return 
  objects. 
  Was 4K, increased to 16K. Also enhanced error messages for debugger 
  method 
  execution, including the buffer overflow case.
  
  ----------------------------------------
  13 October 2010. Summary of changes for version 20101013:
  
  1) ACPI CA Core Subsystem:
  
  Added support to clear the PCIEXP_WAKE event. When clearing ACPI events, 
  now 
  clear the PCIEXP_WAKE_STS bit in the ACPI PM1 Status Register, via 
  HwClearAcpiStatus. Original change from Colin King. ACPICA BZ 880.
  
  Changed the type of the predefined namespace object _TZ from ThermalZone 
  to 
  Device. This was found to be confusing to the host software that 
  processes 
  the various thermal zones, since _TZ is not really a ThermalZone. 
  However, 
  a 
  Notify() can still be performed on it. ACPICA BZ 876. Suggestion from Rui 
  Zhang.
  
  Added Windows Vista SP2 to the list of supported _OSI strings. The actual 
  string is "Windows 2006 SP2".
  
  Eliminated duplicate code in AcpiUtExecute* functions. Now that the 
  nsrepair 
  code automatically repairs _HID-related strings, this type of code is no 
  longer needed in Execute_HID, Execute_CID, and Execute_UID. ACPICA BZ 
  878.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a 
  much larger code and data size.
  
    Previous Release:
      Non-Debug Version:  89.9K Code, 19.0K Data, 108.9K Total
      Debug Version:     166.3K Code, 52.1K Data, 218.4K Total
    Current Release:
      Non-Debug Version:  89.9K Code, 19.0K Data, 108.9K Total
      Debug Version:     166.3K Code, 52.1K Data, 218.4K Total
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Implemented additional compile-time validation for _HID strings. 
  The 
  non-hex prefix (such as "PNP" or "ACPI") must be uppercase, and the 
  length 
  of 
  the string must be exactly seven or eight characters. For both _HID and 
  _CID 
  strings, all characters must be alphanumeric. ACPICA BZ 874.
  
  iASL: Allow certain "null" resource descriptors. Some BIOS code creates 
  descriptors that are mostly or all zeros, with the expectation that they 
  will 
  be filled in at runtime. iASL now allows this as long as there is a 
  "resource 
  tag" (name) associated with the descriptor, which gives the ASL a handle 
  needed to modify the descriptor. ACPICA BZ 873.
  
  Added single-thread support to the generic Unix application OSL. 
  Primarily 
  for iASL support, this change removes the use of semaphores in the 
  single-
  threaded ACPICA tools/applications - increasing performance. The 
  _MULTI_THREADED option was replaced by the (reverse) ACPI_SINGLE_THREADED 
  option. ACPICA BZ 879.
  
  AcpiExec: several fixes for the 64-bit version. Adds XSDT support and 
  support 
  for 64-bit DSDT/FACS addresses in the FADT. Lin Ming.
  
  iASL: Moved all compiler messages to a new file, aslmessages.h.
  
  ----------------------------------------
  15 September 2010. Summary of changes for version 20100915:
  
  1) ACPI CA Core Subsystem:
  
  Removed the AcpiOsDerivePciId OSL interface. The various host 
  implementations 
  of this function were not OS-dependent and are now obsolete and can be 
  removed from all host OSLs. This function has been replaced by 
  AcpiHwDerivePciId, which is now part of the ACPICA core code. 
  AcpiHwDerivePciId has been implemented without recursion. Adds one new 
  module, hwpci.c. ACPICA BZ 857.
  
  Implemented a dynamic repair for _HID and _CID strings. The following 
  problems are now repaired at runtime: 1) Remove a leading asterisk in the 
  string, and 2) the entire string is uppercased. Both repairs are in 
  accordance with the ACPI specification and will simplify host driver 
  code. 
  ACPICA BZ 871.
  
  The ACPI_THREAD_ID type is no longer configurable, internally it is now 
  always UINT64. This simplifies the ACPICA code, especially any printf 
  output. 
  UINT64 is the only common data type for all thread_id types across all 
  operating systems. It is now up to the host OSL to cast the native 
  thread_id 
  type to UINT64 before returning the value to ACPICA (via 
  AcpiOsGetThreadId). 
  Lin Ming, Bob Moore.
  
  Added the ACPI_INLINE type to enhance the ACPICA configuration. The 
  "inline" 
  keyword is not standard across compilers, and this type allows inline to 
  be 
  configured on a per-compiler basis. Lin Ming.
  
  Made the system global AcpiGbl_SystemAwakeAndRunning publicly
  available. 
  Added an extern for this boolean in acpixf.h. Some hosts utilize this 
  value 
  during suspend/restore operations. ACPICA BZ 869.
  
  All code that implements error/warning messages with the "ACPI:" prefix 
  has 
  been moved to a new module, utxferror.c.
  
  The UINT64_OVERLAY was moved to utmath.c, which is the only module where 
  it 
  is used. ACPICA BZ 829. Lin Ming, Bob Moore.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a 
  much larger code and data size.
  
    Previous Release:
      Non-Debug Version:  89.1K Code, 19.0K Data, 108.1K Total
      Debug Version:     165.1K Code, 51.9K Data, 217.0K Total
    Current Release:
      Non-Debug Version:  89.9K Code, 19.0K Data, 108.9K Total
      Debug Version:     166.3K Code, 52.1K Data, 218.4K Total
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL/Disassembler: Write ACPI errors to stderr instead of the output 
  file. 
  This keeps the output files free of random error messages that may 
  originate 
  from within the namespace/interpreter code. Used this opportunity to 
  merge 
  all ACPI:-style messages into a single new module, utxferror.c. ACPICA BZ 
  866. Lin Ming, Bob Moore.
  
  Tools: update some printfs for ansi warnings on size_t. Handle width 
  change 
  of size_t on 32-bit versus 64-bit generations. Lin Ming.
  
  ----------------------------------------
  06 August 2010. Summary of changes for version 20100806:
  
  1) ACPI CA Core Subsystem:
  
  Designed and implemented a new host interface to the _OSI support code. 
  This 
  will allow the host to dynamically add or remove multiple _OSI strings, 
  as 
  well as install an optional handler that is called for each _OSI 
  invocation. 
  Also added a new AML debugger command, 'osi' to display and modify the 
  global 
  _OSI string table, and test support in the AcpiExec utility. See the 
  ACPICA 
  reference manual for full details. Lin Ming, Bob Moore. ACPICA BZ 836.
  New Functions:
      AcpiInstallInterface - Add an _OSI string.
      AcpiRemoveInterface - Delete an _OSI string.
      AcpiInstallInterfaceHandler - Install optional _OSI handler.
  Obsolete Functions:
      AcpiOsValidateInterface - no longer used.
  New Files:
      source/components/utilities/utosi.c
  
  Re-introduced the support to enable multi-byte transfers for Embedded 
  Controller (EC) operation regions. A reported problem was found to be a 
  bug 
  in the host OS, not in the multi-byte support. Previously, the maximum 
  data 
  size passed to the EC operation region handler was a single byte. There 
  are 
  often EC Fields larger than one byte that need to be transferred, and it 
  is 
  useful for the EC driver to lock these as a single transaction. This 
  change 
  enables single transfers larger than 8 bits. This effectively changes the 
  access to the EC space from ByteAcc to AnyAcc, and will probably require 
  changes to the host OS Embedded Controller driver to enable 16/32/64/256-
  bit 
  transfers in addition to 8-bit transfers. Alexey Starikovskiy, Lin Ming.
  
  Fixed a problem with the prototype for AcpiOsReadPciConfiguration. The 
  prototype in acpiosxf.h had the output value pointer as a (void *).
  It should be a (UINT64 *). This may affect some host OSL code.
  
  Fixed a couple problems with the recently modified Linux makefiles for 
  iASL 
  and AcpiExec. These new makefiles place the generated object files in the 
  local directory so that there can be no collisions between the files that 
  are 
  shared between them that are compiled with different options.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a 
  much larger code and data size.
  
    Previous Release:
      Non-Debug Version:  88.3K Code, 18.8K Data, 107.1K Total
      Debug Version:     164.0K Code, 51.5K Data, 215.5K Total
    Current Release:
      Non-Debug Version:  89.1K Code, 19.0K Data, 108.1K Total
      Debug Version:     165.1K Code, 51.9K Data, 217.0K Total
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL/Disassembler: Added a new option (-da, "disassemble all") to load 
  the 
  namespace from and disassemble an entire group of AML files. Useful for 
  loading all of the AML tables for a given machine (DSDT, SSDT1...SSDTn) 
  and 
  disassembling with one simple command. ACPICA BZ 865. Lin Ming.
  
  iASL: Allow multiple invocations of -e option. This change allows 
  multiple 
  uses of -e on the command line: "-e ssdt1.dat -e ssdt2.dat". ACPICA BZ 
  834. 
  Lin Ming.
  
  ----------------------------------------
  02 July 2010. Summary of changes for version 20100702:
  
  1) ACPI CA Core Subsystem:
  
  Implemented several updates to the recently added GPE reference count 
  support. The model for "wake" GPEs is changing to give the host OS 
  complete 
  control of these GPEs. Eventually, the ACPICA core will not execute any 
  _PRW 
  methods, since the host already must execute them. Also, additional 
  changes 
  were made to help ensure that the reference counts are kept in proper 
  synchronization with reality. Rafael J. Wysocki.
  
  1) Ensure that GPEs are not enabled twice during initialization.
  2) Ensure that GPE enable masks stay in sync with the reference count.
  3) Do not inadvertently enable GPEs when writing GPE registers.
  4) Remove the internal wake reference counter and add new AcpiGpeWakeup 
  interface. This interface will set or clear individual GPEs for wakeup.
  5) Remove GpeType argument from AcpiEnable and AcpiDisable. These 
  interfaces 
  are now used for "runtime" GPEs only.
  
  Changed the behavior of the GPE install/remove handler interfaces. The 
  GPE 
  is 
  no longer disabled during this process, as it was found to cause problems 
  on 
  some machines. Rafael J. Wysocki.
  
  Reverted a change introduced in version 20100528 to enable Embedded 
  Controller multi-byte transfers. This change was found to cause problems 
  with 
  Index Fields and possibly Bank Fields. It will be reintroduced when these 
  problems have been resolved.
  
  Fixed a problem with references to Alias objects within Package Objects. 
  A 
  reference to an Alias within the definition of a Package was not always 
  resolved properly. Aliases to objects like Processors, Thermal zones, 
  etc. 
  were resolved to the actual object instead of a reference to the object 
  as 
  it 
  should be. Package objects are only allowed to contain integer, string, 
  buffer, package, and reference objects. Redhat bugzilla 608648.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a 
  much larger code and data size.
  
    Previous Release:
      Non-Debug Version:  88.3K Code, 18.8K Data, 107.1K Total
      Debug Version:     164.1K Code, 51.5K Data, 215.6K Total
    Current Release:
      Non-Debug Version:  88.3K Code, 18.8K Data, 107.1K Total
      Debug Version:     164.0K Code, 51.5K Data, 215.5K Total
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Implemented a new compiler subsystem to allow definition and 
  compilation of the non-AML ACPI tables such as FADT, MADT, SRAT, etc. 
  These 
  are called "ACPI Data Tables", and the new compiler is the "Data Table 
  Compiler". This compiler is intended to simplify the existing error-prone 
  process of creating these tables for the BIOS, as well as allowing the 
  disassembly, modification, recompilation, and override of existing ACPI 
  data 
  tables. See the iASL User Guide for detailed information.
  
  iASL: Implemented a new Template Generator option in support of the new 
  Data 
  Table Compiler. This option will create examples of all known ACPI tables 
  that can be used as the basis for table development. See the iASL 
  documentation and the -T option.
  
  Disassembler and headers: Added support for the WDDT ACPI table (Watchdog 
  Descriptor Table).
  
  Updated the Linux makefiles for iASL and AcpiExec to place the generated 
  object files in the local directory so that there can be no collisions 
  between the shared files between them that are generated with different 
  options.
  
  Added support for Mac OS X in the Unix OSL used for iASL and AcpiExec. 
  Use 
  the #define __APPLE__ to enable this support.
  
  ----------------------------------------
  28 May 2010. Summary of changes for version 20100528:
  
  Note: The ACPI 4.0a specification was released on April 5, 2010 and is 
  available at www.acpi.info. This is primarily an errata release.
  
  1) ACPI CA Core Subsystem:
  
  Undefined ACPI tables: We are looking for the definitions for the 
  following 
  ACPI tables that have been seen in the field: ATKG, IEIT, GSCI.
  
  Implemented support to enable multi-byte transfers for Embedded 
  Controller 
  (EC) operation regions. Previously, the maximum data size passed to the 
  EC 
  operation region handler was a single byte. There are often EC Fields 
  larger 
  than one byte that need to be transferred, and it is useful for the EC 
  driver 
  to lock these as a single transaction. This change enables single 
  transfers 
  larger than 8 bits. This effectively changes the access to the EC space 
  from 
  ByteAcc to AnyAcc, and will probably require changes to the host OS 
  Embedded 
  Controller driver to enable 16/32/64/256-bit transfers in addition to 8-
  bit 
  transfers. Alexey Starikovskiy, Lin Ming
  
  Implemented a performance enhancement for namespace search and access. 
  This 
  change enhances the performance of namespace searches and walks by adding 
  a 
  backpointer to the parent in each namespace node. On large namespaces, 
  this 
  change can improve overall ACPI performance by up to 9X. Adding a pointer 
  to 
  each namespace node increases the overall size of the internal namespace 
  by 
  about 5%, since each namespace entry usually consists of both a namespace 
  node and an ACPI operand object. However, this is the first growth of the 
  namespace in ten years. ACPICA bugzilla 817. Alexey Starikovskiy.
  
  Implemented a performance optimization that reduces the number of 
  namespace 
  walks. On control method exit, only walk the namespace if the method is 
  known 
  to have created namespace objects outside of its local scope. Previously, 
  the 
  entire namespace was traversed on each control method exit. This change 
  can 
  improve overall ACPI performance by up to 3X. Alexey Starikovskiy, Bob 
  Moore.
  
  Added support to truncate I/O addresses to 16 bits for Windows 
  compatibility. 
  Some ASL code has been seen in the field that inadvertently has bits set 
  above bit 15. This feature is optional and is enabled if the BIOS 
  requests 
  any Windows OSI strings. It can also be enabled by the host OS. Matthew 
  Garrett, Bob Moore.
  
  Added support to limit the maximum time for the ASL Sleep() operator. To 
  prevent accidental deep sleeps, limit the maximum time that Sleep() will 
  actually sleep. Configurable, the default maximum is two seconds. ACPICA 
  bugzilla 854.
  
  Added run-time validation support for the _WDG and_WED Microsoft 
  predefined 
  methods. These objects are defined by "Windows Instrumentation", and are 
  not 
  part of the ACPI spec. ACPICA BZ 860.
  
  Expanded all statistic counters used during namespace and device 
  initialization from 16 to 32 bits in order to support very large 
  namespaces.
  
  Replaced all instances of %d in printf format specifiers with %u since 
  nearly 
  all integers in ACPICA are unsigned.
  
  Fixed the exception namestring for AE_WAKE_ONLY_GPE. Was incorrectly 
  returned 
  as AE_NO_HANDLER.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a 
  much larger code and data size.
  
    Previous Release:
      Non-Debug Version:  88.4K Code, 18.8K Data, 107.2K Total
      Debug Version:     164.2K Code, 51.5K Data, 215.7K Total
    Current Release:
      Non-Debug Version:  88.3K Code, 18.8K Data, 107.1K Total
      Debug Version:     164.1K Code, 51.5K Data, 215.6K Total
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Added compiler support for the _WDG and_WED Microsoft predefined 
  methods. These objects are defined by "Windows Instrumentation", and are 
  not 
  part of the ACPI spec. ACPICA BZ 860.
  
  AcpiExec: added option to disable the memory tracking mechanism. The -dt 
  option will disable the tracking mechanism, which improves performance 
  considerably.
  
  AcpiExec: Restructured the command line options into -d (disable) and -e 
  (enable) options.
  
  ----------------------------------------
  28 April 2010. Summary of changes for version 20100428:
  
  1) ACPI CA Core Subsystem:
  
  Implemented GPE support for dynamically loaded ACPI tables. For all GPEs, 
  including FADT-based and GPE Block Devices, execute any _PRW methods in 
  the 
  new table, and process any _Lxx/_Exx GPE methods in the new table. Any 
  runtime GPE that is referenced by an _Lxx/_Exx method in the new table is 
  immediately enabled. Handles the FADT-defined GPEs as well as GPE Block 
  Devices. Provides compatibility with other ACPI implementations. Two new 
  files added, evgpeinit.c and evgpeutil.c. ACPICA BZ 833. Lin Ming, Bob 
  Moore.
  
  Fixed a regression introduced in version 20100331 within the table 
  manager 
  where initial table loading could fail. This was introduced in the fix 
  for 
  AcpiReallocateRootTable. Also, renamed some of fields in the table 
  manager 
  data structures to clarify their meaning and use.
  
  Fixed a possible allocation overrun during internal object copy in 
  AcpiUtCopySimpleObject. The original code did not correctly handle the 
  case 
  where the object to be copied was a namespace node. Lin Ming. ACPICA BZ 
  847.
  
  Updated the allocation dump routine, AcpiUtDumpAllocation and fixed a 
  possible access beyond end-of-allocation. Also, now fully validate 
  descriptor 
  (size and type) before output. Lin Ming, Bob Moore. ACPICA BZ 847
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a 
  much larger code and data size.
  
    Previous Release:
      Non-Debug Version:  87.9K Code, 18.6K Data, 106.5K Total
      Debug Version:     163.5K Code, 51.3K Data, 214.8K Total
    Current Release:
      Non-Debug Version:  88.4K Code, 18.8K Data, 107.2K Total
      Debug Version:     164.2K Code, 51.5K Data, 215.7K Total
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Implemented Min/Max/Len/Gran validation for address resource 
  descriptors. This change implements validation for the address fields 
  that 
  are common to all address-type resource descriptors. These checks are 
  implemented: Checks for valid Min/Max, length within the Min/Max window, 
  valid granularity, Min/Max a multiple of granularity, and _MIF/_MAF as 
  per 
  table 6-40 in the ACPI 4.0a specification. Also split the large 
  aslrestype1.c 
  and aslrestype2.c files into five new files. ACPICA BZ 840.
  
  iASL: Added support for the _Wxx predefined names. This support was 
  missing 
  and these names were not recognized by the compiler as valid predefined 
  names. ACPICA BZ 851.
  
  iASL: Added an error for all predefined names that are defined to return 
  no 
  value and thus must be implemented as Control Methods. These include all 
  of 
  the _Lxx, _Exx, _Wxx, and _Qxx names, as well as some other miscellaneous 
  names such as _DIS, _INI, _IRC, _OFF, _ON, and _PSx. ACPICA BZ 850, 856.
  
  iASL: Implemented the -ts option to emit hex AML data in ASL format, as 
  an 
  ASL Buffer. Allows ACPI tables to be easily included within ASL files, to 
  be 
  dynamically loaded via the Load() operator. Also cleaned up output for 
  the 
  -
  ta and -tc options. ACPICA BZ 853.
  
  Tests: Added a new file with examples of extended iASL error checking. 
  Demonstrates the advanced error checking ability of the iASL compiler. 
  Available at tests/misc/badcode.asl.
  
  ----------------------------------------
  31 March 2010. Summary of changes for version 20100331:
  
  1) ACPI CA Core Subsystem:
  
  Completed a major update for the GPE support in order to improve support 
  for 
  shared GPEs and to simplify both host OS and ACPICA code. Added a 
  reference 
  count mechanism to support shared GPEs that require multiple device 
  drivers. 
  Several external interfaces have changed. One external interface has been 
  removed. One new external interface was added. Most of the GPE external 
  interfaces now use the GPE spinlock instead of the events mutex (and the 
  Flags parameter for many GPE interfaces has been removed.) See the 
  updated 
  ACPICA Programmer Reference for details. Matthew Garrett, Bob Moore, 
  Rafael 
  Wysocki. ACPICA BZ 831.
  
  Changed:
      AcpiEnableGpe, AcpiDisableGpe, AcpiClearGpe, AcpiGetGpeStatus
  Removed:
      AcpiSetGpeType
  New:
      AcpiSetGpe
  
  Implemented write support for DataTable operation regions. These regions 
  are 
  defined via the DataTableRegion() operator. Previously, only read support 
  was 
  implemented. The ACPI specification allows DataTableRegions to be 
  read/write, 
  however.
  
  Implemented a new subsystem option to force a copy of the DSDT to local 
  memory. Optionally copy the entire DSDT to local memory (instead of 
  simply 
  mapping it.) There are some (albeit very rare) BIOSs that corrupt or 
  replace 
  the original DSDT, creating the need for this option. Default is FALSE, 
  do 
  not copy the DSDT.
  
  Implemented detection of a corrupted or replaced DSDT. This change adds 
  support to detect a DSDT that has been corrupted and/or replaced from 
  outside 
  the OS (by firmware). This is typically catastrophic for the system, but 
  has 
  been seen on some machines. Once this problem has been detected, the DSDT 
  copy option can be enabled via system configuration. Lin Ming, Bob Moore.
  
  Fixed two problems with AcpiReallocateRootTable during the root table 
  copy. 
  When copying the root table to the new allocation, the length used was 
  incorrect. The new size was used instead of the current table size, 
  meaning 
  too much data was copied. Also, the count of available slots for ACPI 
  tables 
  was not set correctly. Alexey Starikovskiy, Bob Moore.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a 
  much larger code and data size.
  
    Previous Release:
      Non-Debug Version:  87.5K Code, 18.4K Data, 105.9K Total
      Debug Version:     163.4K Code, 51.1K Data, 214.5K Total
    Current Release:
      Non-Debug Version:  87.9K Code, 18.6K Data, 106.5K Total
      Debug Version:     163.5K Code, 51.3K Data, 214.8K Total
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Implement limited typechecking for values returned from predefined 
  control methods. The type of any returned static (unnamed) object is now 
  validated. For example, Return(1). ACPICA BZ 786.
  
  iASL: Fixed a predefined name object verification regression. Fixes a 
  problem 
  introduced in version 20100304. An error is incorrectly generated if a 
  predefined name is declared as a static named object with a value defined 
  using the keywords "Zero", "One", or "Ones". Lin Ming.
  
  iASL: Added Windows 7 support for the -g option (get local ACPI tables) 
  by 
  reducing the requested registry access rights. ACPICA BZ 842.
  
  Disassembler: fixed a possible fault when generating External() 
  statements. 
  Introduced in commit ae7d6fd: Properly handle externals with parent-
  prefix 
  (carat). Fixes a string length allocation calculation. Lin Ming.
  
  ----------------------------------------
  04 March 2010. Summary of changes for version 20100304:
  
  1) ACPI CA Core Subsystem:
  
  Fixed a possible problem with the AML Mutex handling function 
  AcpiExReleaseMutex where the function could fault under the very rare 
  condition when the interpreter has blocked, the interpreter lock is 
  released, 
  the interpreter is then reentered via the same thread, and attempts to 
  acquire an AML mutex that was previously acquired. FreeBSD report 140979. 
  Lin 
  Ming.
  
  Implemented additional configuration support for the AML "Debug Object". 
  Output from the debug object can now be enabled via a global variable, 
  AcpiGbl_EnableAmlDebugObject. This will assist with remote machine 
  debugging. 
  This debug output is now available in the release version of ACPICA 
  instead 
  of just the debug version. Also, the entire debug output module can now 
  be 
  configured out of the ACPICA build if desired. One new file added, 
  executer/exdebug.c. Lin Ming, Bob Moore.
  
  Added header support for the ACPI MCHI table (Management Controller Host 
  Interface Table). This table was added in ACPI 4.0, but the defining 
  document 
  has only recently become available.
  
  Standardized output of integer values for ACPICA warnings/errors. Always 
  use 
  0x prefix for hex output, always use %u for unsigned integer decimal 
  output. 
  Affects ACPI_INFO, ACPI_ERROR, ACPI_EXCEPTION, and ACPI_WARNING (about 
  400 
  invocations.) These invocations were converted from the original 
  ACPI_DEBUG_PRINT invocations and were not consistent. ACPICA BZ 835.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a 
  much larger code and data size.
  
    Previous Release:
      Non-Debug Version:  87.1K Code, 18.0K Data, 105.1K Total
      Debug Version:     163.5K Code, 50.9K Data, 214.4K Total
    Current Release:
      Non-Debug Version:  87.5K Code, 18.4K Data, 105.9K Total
      Debug Version:     163.4K Code, 51.1K Data, 214.5K Total
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Implemented typechecking support for static (non-control method) 
  predefined named objects that are declared with the Name() operator. For 
  example, the type of this object is now validated to be of type Integer: 
  Name(_BBN, 1). This change migrates the compiler to using the core 
  predefined 
  name table instead of maintaining a local version. Added a new file, 
  aslpredef.c. ACPICA BZ 832.
  
  Disassembler: Added support for the ACPI 4.0 MCHI table.
  
  ----------------------------------------
  21 January 2010. Summary of changes for version 20100121:
  
  1) ACPI CA Core Subsystem:
  
  Added the 2010 copyright to all module headers and signons. This affects 
  virtually every file in the ACPICA core subsystem, the iASL compiler, the 
  tools/utilities, and the test suites.
  
  Implemented a change to the AcpiGetDevices interface to eliminate 
  unnecessary 
  invocations of the _STA method. In the case where a specific _HID is 
  requested, do not run _STA until a _HID match is found. This eliminates 
  potentially dozens of _STA calls during a search for a particular 
  device/HID, 
  which in turn can improve boot times. ACPICA BZ 828. Lin Ming.
  
  Implemented an additional repair for predefined method return values. 
  Attempt 
  to repair unexpected NULL elements within returned Package objects. 
  Create 
  an 
  Integer of value zero, a NULL String, or a zero-length Buffer as 
  appropriate. 
  ACPICA BZ 818. Lin Ming, Bob Moore.
  
  Removed the obsolete ACPI_INTEGER data type. This type was introduced as 
  the 
  code was migrated from ACPI 1.0 (with 32-bit AML integers) to ACPI 2.0 
  (with 
  64-bit AML integers). It is now obsolete and this change removes it from 
  the 
  ACPICA code base, replaced by UINT64. The original typedef has been 
  retained 
  for now for compatibility with existing device driver code. ACPICA BZ 
  824.
  
  Removed the unused UINT32_STRUCT type, and the obsolete Integer64 field 
  in 
  the parse tree object.
  
  Added additional warning options for the gcc-4 generation. Updated the 
  source 
  accordingly. This includes some code restructuring to eliminate 
  unreachable 
  code, elimination of some gotos, elimination of unused return values, 
  some 
  additional casting, and removal of redundant declarations.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a 
  much larger code and data size.
  
    Previous Release:
      Non-Debug Version:  87.0K Code, 18.0K Data, 105.0K Total
      Debug Version:     163.4K Code, 50.8K Data, 214.2K Total
    Current Release:
      Non-Debug Version:  87.1K Code, 18.0K Data, 105.1K Total
      Debug Version:     163.5K Code, 50.9K Data, 214.4K Total
  
  2) iASL Compiler/Disassembler and Tools:
  
  No functional changes for this release.
  
  ----------------------------------------
  14 December 2009. Summary of changes for version 20091214:
  
  1) ACPI CA Core Subsystem:
  
  Enhanced automatic data type conversions for predefined name repairs. 
  This 
  change expands the automatic repairs/conversions for predefined name 
  return 
  values to make Integers, Strings, and Buffers fully interchangeable. 
  Also, 
  a 
  Buffer can be converted to a Package of Integers if necessary. The 
  nsrepair.c 
  module was completely restructured. Lin Ming, Bob Moore.
  
  Implemented automatic removal of null package elements during predefined 
  name 
  repairs. This change will automatically remove embedded and trailing NULL 
  package elements from returned package objects that are defined to 
  contain 
  a 
  variable number of sub-packages. The driver is then presented with a 
  package 
  with no null elements to deal with. ACPICA BZ 819.
  
  Implemented a repair for the predefined _FDE and _GTM names. The expected 
  return value for both names is a Buffer of 5 DWORDs. This repair fixes 
  two 
  possible problems (both seen in the field), where a package of integers 
  is 
  returned, or a buffer of BYTEs is returned. With assistance from Jung-uk 
  Kim.
  
  Implemented additional module-level code support. This change will 
  properly 
  execute module-level code that is not at the root of the namespace (under 
  a 
  Device object, etc.). Now executes the code within the current scope 
  instead 
  of the root. ACPICA BZ 762. Lin Ming.
  
  Fixed possible mutex acquisition errors when running _REG methods. Fixes 
  a 
  problem where mutex errors can occur when running a _REG method that is 
  in 
  the same scope as a method-defined operation region or an operation 
  region 
  under a module-level IF block. This type of code is rare, so the problem 
  has 
  not been seen before. ACPICA BZ 826. Lin Ming, Bob Moore.
  
  Fixed a possible memory leak during module-level code execution. An 
  object 
  could be leaked for each block of executed module-level code if the 
  interpreter slack mode is enabled This change deletes any implicitly 
  returned 
  object from the module-level code block. Lin Ming.
  
  Removed messages for successful predefined repair(s). The repair 
  mechanism 
  was considered too wordy. Now, messages are only unconditionally emitted 
  if 
  the return object cannot be repaired. Existing messages for successful 
  repairs were converted to ACPI_DEBUG_PRINT messages for now. ACPICA BZ 
  827.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a 
  much larger code and data size.
  
    Previous Release:
      Non-Debug Version:  86.6K Code, 18.2K Data, 104.8K Total
      Debug Version:     162.7K Code, 50.8K Data, 213.5K Total
    Current Release:
      Non-Debug Version:  87.0K Code, 18.0K Data, 105.0K Total
      Debug Version:     163.4K Code, 50.8K Data, 214.2K Total
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Fixed a regression introduced in 20091112 where intermediate .SRC 
  files 
  were no longer automatically removed at the termination of the compile.
  
  acpiexec: Implemented the -f option to specify default region fill value. 
  This option specifies the value used to initialize buffers that simulate 
  operation regions. Default value is zero. Useful for debugging problems 
  that 
  depend on a specific initial value for a region or field.
  
  ----------------------------------------
  12 November 2009. Summary of changes for version 20091112:
  
  1) ACPI CA Core Subsystem:
  
  Implemented a post-order callback to AcpiWalkNamespace. The existing 
  interface only has a pre-order callback. This change adds an additional 
  parameter for a post-order callback which will be more useful for bus 
  scans. 
  ACPICA BZ 779. Lin Ming. Updated the ACPICA Programmer Reference.
  
  Modified the behavior of the operation region memory mapping cache for 
  SystemMemory. Ensure that the memory mappings created for operation 
  regions 
  do not cross 4K page boundaries. Crossing a page boundary while mapping 
  regions can cause kernel warnings on some hosts if the pages have 
  different 
  attributes. Such regions are probably BIOS bugs, and this is the 
  workaround. 
  Linux BZ 14445. Lin Ming.
  
  Implemented an automatic repair for predefined methods that must return 
  sorted lists. This change will repair (by sorting) packages returned by 
  _ALR, 
  _PSS, and _TSS. Drivers can now assume that the packages are correctly 
  sorted 
  and do not contain NULL package elements. Adds one new file, 
  namespace/nsrepair2.c. ACPICA BZ 784. Lin Ming, Bob Moore.
  
  Fixed a possible fault during predefined name validation if a return 
  Package 
  object contains NULL elements. Also adds a warning if a NULL element is 
  followed by any non-null elements. ACPICA BZ 813, 814. Future enhancement 
  may 
  include repair or removal of all such NULL elements where possible.
  
  Implemented additional module-level executable AML code support. This 
  change 
  will execute module-level code that is not at the root of the namespace 
  (under a Device object, etc.) at table load time. Module-level executable 
  AML 
  code has been illegal since ACPI 2.0. ACPICA BZ 762. Lin Ming.
  
  Implemented a new internal function to create Integer objects. This 
  function 
  simplifies miscellaneous object creation code. ACPICA BZ 823.
  
  Reduced the severity of predefined repair messages, Warning to Info. 
  Since 
  the object was successfully repaired, a warning is too severe. Reduced to 
  an 
  info message for now. These messages may eventually be changed to debug-
  only. 
  ACPICA BZ 812.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a 
  much larger code and data size.
  
    Previous Release:
      Non-Debug Version:  85.8K Code, 18.0K Data, 103.8K Total
      Debug Version:     161.8K Code, 50.6K Data, 212.4K Total
    Current Release:
      Non-Debug Version:  86.6K Code, 18.2K Data, 104.8K Total
      Debug Version:     162.7K Code, 50.8K Data, 213.5K Total
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Implemented Switch() with While(1) so that Break works correctly. 
  This 
  change correctly implements the Switch operator with a surrounding 
  While(1) 
  so that the Break operator works as expected. ACPICA BZ 461. Lin Ming.
  
  iASL: Added a message if a package initializer list is shorter than 
  package 
  length. Adds a new remark for a Package() declaration if an initializer 
  list 
  exists, but is shorter than the declared length of the package. Although 
  technically legal, this is probably a coding error and it is seen in the 
  field. ACPICA BZ 815. Lin Ming, Bob Moore.
  
  iASL: Fixed a problem where the compiler could fault after the maximum 
  number 
  of errors was reached (200).
  
  acpixtract: Fixed a possible warning for pointer cast if the compiler 
  warning 
  level set very high.
  
  ----------------------------------------
  13 October 2009. Summary of changes for version 20091013:
  
  1) ACPI CA Core Subsystem:
  
  Fixed a problem where an Operation Region _REG method could be executed 
  more 
  than once. If a custom address space handler is installed by the host 
  before 
  the "initialize operation regions" phase of the ACPICA initialization, 
  any 
  _REG methods for that address space could be executed twice. This change 
  fixes the problem. ACPICA BZ 427. Lin Ming.
  
  Fixed a possible memory leak for the Scope() ASL operator. When the exact 
  invocation of "Scope(\)" is executed (change scope to root), one internal 
  operand object was leaked. Lin Ming.
  
  Implemented a run-time repair for the _MAT predefined method. If the _MAT 
  return value is defined as a Field object in the AML, and the field
  size is less than or equal to the default width of an integer (32 or 
  64),_MAT 
  can incorrectly return an Integer instead of a Buffer. ACPICA now 
  automatically repairs this problem. ACPICA BZ 810.
  
  Implemented a run-time repair for the _BIF and _BIX predefined methods. 
  The 
  "OEM Information" field is often incorrectly returned as an Integer with 
  value zero if the field is not supported by the platform. This is due to 
  an 
  ambiguity in the ACPI specification. The field should always be a string. 
  ACPICA now automatically repairs this problem by returning a NULL string 
  within the returned Package. ACPICA BZ 807.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a 
  much larger code and data size.
  
    Previous Release:
      Non-Debug Version:  85.6K Code, 18.0K Data, 103.6K Total
      Debug Version:     161.7K Code, 50.9K Data, 212.6K Total
    Current Release:
      Non-Debug Version:  85.8K Code, 18.0K Data, 103.8K Total
      Debug Version:     161.8K Code, 50.6K Data, 212.4K Total
  
  2) iASL Compiler/Disassembler and Tools:
  
  Disassembler: Fixed a problem where references to external symbols that 
  contained one or more parent-prefixes (carats) were not handled 
  correctly, 
  possibly causing a fault. ACPICA BZ 806. Lin Ming.
  
  Disassembler: Restructured the code so that all functions that handle 
  external symbols are in a single module. One new file is added, 
  common/dmextern.c.
  
  AML Debugger: Added a max count argument for the Batch command (which 
  executes multiple predefined methods within the namespace.)
  
  iASL: Updated the compiler documentation (User Reference.) Available at 
  http://www.acpica.org/documentation/. ACPICA BZ 750.
  
  AcpiXtract: Updated for Lint and other formatting changes. Close all open 
  files.
  
  ----------------------------------------
  03 September 2009. Summary of changes for version 20090903:
  
  1) ACPI CA Core Subsystem:
  
  For Windows Vista compatibility, added the automatic execution of an _INI 
  method located at the namespace root (\_INI). This method is executed at 
  table load time. This support is in addition to the automatic execution 
  of 
  \_SB._INI. Lin Ming.
  
  Fixed a possible memory leak in the interpreter for AML package objects 
  if 
  the package initializer list is longer than the defined size of the 
  package. 
  This apparently can only happen if the BIOS changes the package size on 
  the 
  fly (seen in a _PSS object), as ASL compilers do not allow this. The 
  interpreter will truncate the package to the defined size (and issue an 
  error 
  message), but previously could leave the extra objects undeleted if they 
  were 
  pre-created during the argument processing (such is the case if the 
  package 
  consists of a number of sub-packages as in the _PSS.) ACPICA BZ 805.
  
  Fixed a problem seen when a Buffer or String is stored to itself via ASL. 
  This has been reported in the field. Previously, ACPICA would zero out 
  the 
  buffer/string. Now, the operation is treated as a noop. Provides Windows 
  compatibility. ACPICA BZ 803. Lin Ming.
  
  Removed an extraneous error message for ASL constructs of the form 
  Store(LocalX,LocalX) when LocalX is uninitialized. These curious 
  statements 
  are seen in many BIOSs and are once again treated as NOOPs and no error 
  is 
  emitted when they are encountered. ACPICA BZ 785.
  
  Fixed an extraneous warning message if a _DSM reserved method returns a 
  Package object. _DSM can return any type of object, so validation on the 
  return type cannot be performed. ACPICA BZ 802.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a 
  much larger code and data size.
  
    Previous Release:
      Non-Debug Version:  85.5K Code, 18.0K Data, 103.5K Total
      Debug Version:     161.6K Code, 50.9K Data, 212.5K Total
    Current Release:
      Non-Debug Version:  85.6K Code, 18.0K Data, 103.6K Total
      Debug Version:     161.7K Code, 50.9K Data, 212.6K Total
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Fixed a problem with the use of the Alias operator and Resource 
  Templates. The correct alias is now constructed and no error is emitted. 
  ACPICA BZ 738.
  
  iASL: Implemented the -I option to specify additional search directories 
  for 
  include files. Allows multiple additional search paths for include files. 
  Directories are searched in the order specified on the command line 
  (after 
  the local directory is searched.) ACPICA BZ 800.
  
  iASL: Fixed a problem where the full pathname for include files was not 
  emitted for warnings/errors. This caused the IDE support to not work 
  properly. ACPICA BZ 765.
  
  iASL: Implemented the -@ option to specify a Windows-style response file 
  containing additional command line options. ACPICA BZ 801.
  
  AcpiExec: Added support to load multiple AML files simultaneously (such 
  as 
  a 
  DSDT and multiple SSDTs). Also added support for wildcards within the AML 
  pathname. These features allow all machine tables to be easily loaded and 
  debugged together. ACPICA BZ 804.
  
  Disassembler: Added missing support for disassembly of HEST table Error 
  Bank 
  subtables. 
  
  ----------------------------------------
  30 July 2009. Summary of changes for version 20090730:
  
  The ACPI 4.0 implementation for ACPICA is complete with this release.
  
  1) ACPI CA Core Subsystem:
  
  ACPI 4.0: Added header file support for all new and changed ACPI tables. 
  Completely new tables are: IBFT, IVRS, MSCT, and WAET. Tables that are 
  new 
  for ACPI 4.0, but have previously been supported in ACPICA are: CPEP, 
  BERT, 
  EINJ, ERST, and HEST. Other newly supported tables are: UEFI and WDAT. 
  There 
  have been some ACPI 4.0 changes to other existing tables. Split the large 
  actbl1.h header into the existing actbl2.h header. ACPICA BZ 774.
  
  ACPI 4.0: Implemented predefined name validation for all new names. There 
  are 
  31 new names in ACPI 4.0. The predefined validation module was split into 
  two 
  files. The new file is namespace/nsrepair.c. ACPICA BZ 770.
  
  Implemented support for so-called "module-level executable code". This is 
  executable AML code that exists outside of any control method and is 
  intended 
  to be executed at table load time. Although illegal since ACPI 2.0, this 
  type 
  of code still exists and is apparently still being created. Blocks of 
  this 
  code are now detected and executed as intended. Currently, the code 
  blocks 
  must exist under either an If, Else, or While construct; these are the 
  typical cases seen in the field. ACPICA BZ 762. Lin Ming.
  
  Implemented an automatic dynamic repair for predefined names that return 
  nested Package objects. This applies to predefined names that are defined 
  to 
  return a variable-length Package of sub-packages. If the number of sub-
  packages is one, BIOS code is occasionally seen that creates a simple 
  single 
  package with no sub-packages. This code attempts to fix the problem by 
  wrapping a new package object around the existing package. These methods 
  can 
  be repaired: _ALR, _CSD, _HPX, _MLS, _PRT, _PSS, _TRT, and _TSS. ACPICA 
  BZ 
  790.
  
  Fixed a regression introduced in 20090625 for the AcpiGetDevices 
  interface. 
  The _HID/_CID matching was broken and no longer matched IDs correctly. 
  ACPICA 
  BZ 793.
  
  Fixed a problem with AcpiReset where the reset would silently fail if the 
  register was one of the protected I/O ports. AcpiReset now bypasses the 
  port 
  validation mechanism. This may eventually be driven into the 
  AcpiRead/Write 
  interfaces.
  
  Fixed a regression related to the recent update of the AcpiRead/Write 
  interfaces. A sleep/suspend could fail if the optional PM2 Control 
  register 
  does not exist during an attempt to write the Bus Master Arbitration bit. 
  (However, some hosts already delete the code that writes this bit, and 
  the 
  code may in fact be obsolete at this date.) ACPICA BZ 799.
  
  Fixed a problem where AcpiTerminate could fault if inadvertently called 
  twice 
  in succession. ACPICA BZ 795.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a 
  much larger code and data size.
  
    Previous Release:
      Non-Debug Version:  84.7K Code, 17.8K Data, 102.5K Total
      Debug Version:     160.5K Code, 50.6K Data, 211.1K Total
    Current Release:
      Non-Debug Version:  85.5K Code, 18.0K Data, 103.5K Total
      Debug Version:     161.6K Code, 50.9K Data, 212.5K Total
  
  2) iASL Compiler/Disassembler and Tools:
  
  ACPI 4.0: Implemented disassembler support for all new ACPI tables and 
  changes to existing tables. ACPICA BZ 775.
  
  ----------------------------------------
  25 June 2009. Summary of changes for version 20090625:
  
  The ACPI 4.0 Specification was released on June 16 and is available at 
  www.acpi.info. ACPICA implementation of ACPI 4.0 is underway and will 
  continue for the next few releases.
  
  1) ACPI CA Core Subsystem:
  
  ACPI 4.0: Implemented interpreter support for the IPMI operation region 
  address space. Includes support for bi-directional data buffers and an 
  IPMI 
  address space handler (to be installed by an IPMI device driver.) ACPICA 
  BZ 
  773. Lin Ming.
  
  ACPI 4.0: Added changes for existing ACPI tables - FACS and SRAT. 
  Includes 
  support in both the header files and the disassembler.
  
  Completed a major update for the AcpiGetObjectInfo external interface. 
  Changes include:
   - Support for variable, unlimited length HID, UID, and CID strings.
   - Support Processor objects the same as Devices (HID,UID,CID,ADR,STA, 
  etc.)
   - Call the _SxW power methods on behalf of a device object.
   - Determine if a device is a PCI root bridge.
   - Change the ACPI_BUFFER parameter to ACPI_DEVICE_INFO.
  These changes will require an update to all callers of this interface. 
  See 
  the updated ACPICA Programmer Reference for details. One new source file 
  has 
  been added - utilities/utids.c. ACPICA BZ 368, 780.
  
  Updated the AcpiRead and AcpiWrite external interfaces to support 64-bit 
  transfers. The Value parameter has been extended from 32 bits to 64 bits 
  in 
  order to support new ACPI 4.0 tables. These changes will require an 
  update 
  to 
  all callers of these interfaces. See the ACPICA Programmer Reference for 
  details. ACPICA BZ 768.
  
  Fixed several problems with AcpiAttachData. The handler was not invoked 
  when 
  the host node was deleted. The data sub-object was not automatically 
  deleted 
  when the host node was deleted. The interface to the handler had an 
  unused 
  parameter, this was removed. ACPICA BZ 778.
  
  Enhanced the function that dumps ACPI table headers. All non-printable 
  characters in the string fields are now replaced with '?' (Signature, 
  OemId, 
  OemTableId, and CompilerId.) ACPI tables with non-printable characters in 
  these fields are occasionally seen in the field. ACPICA BZ 788.
  
  Fixed a problem with predefined method repair code where the code that 
  attempts to repair/convert an object of incorrect type is only executed 
  on 
  the first time the predefined method is called. The mechanism that 
  disables 
  warnings on subsequent calls was interfering with the repair mechanism. 
  ACPICA BZ 781.
  
  Fixed a possible memory leak in the predefined validation/repair code 
  when 
  a 
  buffer is automatically converted to an expected string object.
  
  Removed obsolete 16-bit files from the distribution and from the current 
  git 
  tree head. ACPICA BZ 776.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a 
  much larger code and data size.
  
    Previous Release:
      Non-Debug Version:  83.4K Code, 17.5K Data, 100.9K Total
      Debug Version:     158.9K Code, 50.0K Data, 208.9K Total
    Current Release:
      Non-Debug Version:  84.7K Code, 17.8K Data, 102.5K Total
      Debug Version:     160.5K Code, 50.6K Data, 211.1K Total
  
  2) iASL Compiler/Disassembler and Tools:
  
  ACPI 4.0: iASL and Disassembler - implemented support for the new IPMI 
  operation region keyword. ACPICA BZ 771, 772. Lin Ming.
  
  ACPI 4.0: iASL - implemented compile-time validation support for all new 
  predefined names and control methods (31 total). ACPICA BZ 769.
  
  ----------------------------------------
  21 May 2009. Summary of changes for version 20090521:
  
  1) ACPI CA Core Subsystem:
  
  Disabled the preservation of the SCI enable bit in the PM1 control 
  register. 
  The SCI enable bit (bit 0, SCI_EN) is defined by the ACPI specification 
  to 
  be 
  a "preserved" bit - "OSPM always preserves this bit position", section 
  4.7.3.2.1. However, some machines fail if this bit is in fact preserved 
  because the bit needs to be explicitly set by the OS as a workaround. No 
  machines fail if the bit is not preserved. Therefore, ACPICA no longer 
  attempts to preserve this bit.
  
  Fixed a problem in AcpiRsGetPciRoutingTableLength where an invalid or 
  incorrectly formed _PRT package could cause a fault. Added validation to 
  ensure that each package element is actually a sub-package.
  
  Implemented a new interface to install or override a single control 
  method, 
  AcpiInstallMethod. This interface is useful when debugging in order to 
  repair 
  an existing method or to install a missing method without having to 
  override 
  the entire ACPI table. See the ACPICA Programmer Reference for use and 
  examples. Lin Ming, Bob Moore.
  
  Fixed several reference count issues with the DdbHandle object that is 
  created from a Load or LoadTable operator. Prevent premature deletion of 
  the 
  object. Also, mark the object as invalid once the table has been 
  unloaded. 
  This is needed because the handle itself may not be deleted after the 
  table 
  unload, depending on whether it has been stored in a named object by the 
  caller. Lin Ming.
  
  Fixed a problem with Mutex Sync Levels. Fixed a problem where if multiple 
  mutexes of the same sync level are acquired but then not released in 
  strict 
  opposite order, the internally maintained Current Sync Level becomes 
  confused 
  and can cause subsequent execution errors. ACPICA BZ 471.
  
  Changed the allowable release order for ASL mutex objects. The ACPI 4.0 
  specification has been changed to make the SyncLevel for mutex objects 
  more 
  useful. When releasing a mutex, the SyncLevel of the mutex must now be 
  the 
  same as the current sync level. This makes more sense than the previous 
  rule 
  (SyncLevel less than or equal). This change updates the code to match the 
  specification.
  
  Fixed a problem with the local version of the AcpiOsPurgeCache function. 
  The 
  (local) cache must be locked during all cache object deletions. Andrew 
  Baumann.
  
  Updated the Load operator to use operation region interfaces. This 
  replaces 
  direct memory mapping with region access calls. Now, all region accesses 
  go 
  through the installed region handler as they should.
  
  Simplified and optimized the NsGetNextNode function. Reduced parameter 
  count 
  and reduced code for this frequently used function.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a 
  much larger code and data size.
  
    Previous Release:
      Non-Debug Version:  82.8K Code, 17.5K Data, 100.3K Total
      Debug Version:     158.0K Code, 49.9K Data, 207.9K Total
    Current Release:
      Non-Debug Version:  83.4K Code, 17.5K Data, 100.9K Total
      Debug Version:     158.9K Code, 50.0K Data, 208.9K Total
  
  2) iASL Compiler/Disassembler and Tools:
  
  Disassembler: Fixed some issues with DMAR, HEST, MADT tables. Some 
  problems 
  with sub-table disassembly and handling invalid sub-tables. Attempt 
  recovery 
  after an invalid sub-table ID.
  
  ----------------------------------------
  22 April 2009. Summary of changes for version 20090422:
  
  1) ACPI CA Core Subsystem:
  
  Fixed a compatibility issue with the recently released I/O port 
  protection 
  mechanism. For windows compatibility, 1) On a port protection violation, 
  simply ignore the request and do not return an exception (allow the 
  control 
  method to continue execution.) 2) If only part of the request overlaps a 
  protected port, read/write the individual ports that are not protected. 
  Linux 
  BZ 13036. Lin Ming
  
  Enhanced the execution of the ASL/AML BreakPoint operator so that it 
  actually 
  breaks into the AML debugger if the debugger is present. This matches the 
  ACPI-defined behavior.
  
  Fixed several possible warnings related to the use of the configurable 
  ACPI_THREAD_ID. This type can now be configured as either an integer or a 
  pointer with no warnings. Also fixes several warnings in printf-like 
  statements for the 64-bit build when the type is configured as a pointer. 
  ACPICA BZ 766, 767.
  
  Fixed a number of possible warnings when compiling with gcc 4+ (depending 
  on 
  warning options.) Examples include printf formats, aliasing, unused 
  globals, 
  missing prototypes, missing switch default statements, use of non-ANSI 
  library functions, use of non-ANSI constructs. See generate/unix/Makefile 
  for 
  a list of warning options used with gcc 3 and 4. ACPICA BZ 735.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a 
  much larger code and data size.
  
    Previous Release:
      Non-Debug Version:  82.6K Code, 17.6K Data, 100.2K Total
      Debug Version:     157.7K Code, 49.9K Data, 207.6K Total
    Current Release:
      Non-Debug Version:  82.8K Code, 17.5K Data, 100.3K Total
      Debug Version:     158.0K Code, 49.9K Data, 207.9K Total
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Fixed a generation warning from Bison 2.3 and fixed several 
  warnings 
  on 
  the 64-bit build.
  
  iASL: Fixed a problem where the Unix/Linux versions of the compiler could 
  not 
  correctly digest Windows/DOS formatted files (with CR/LF).
  
  iASL: Added a new option for "quiet mode" (-va) that produces only the 
  compilation summary, not individual errors and warnings. Useful for large 
  batch compilations.
  
  AcpiExec: Implemented a new option (-z) to enable a forced 
  semaphore/mutex 
  timeout that can be used to detect hang conditions during execution of 
  AML 
  code (includes both internal semaphores and AML-defined mutexes and 
  events.)
  
  Added new makefiles for the generation of acpica in a generic unix-like 
  environment. These makefiles are intended to generate the acpica tools 
  and 
  utilities from the original acpica git source tree structure.
  
  Test Suites: Updated and cleaned up the documentation files. Updated the 
  copyrights to 2009, affecting all source files. Use the new version of 
  iASL 
  with quiet mode. Increased the number of available semaphores in the 
  Windows 
  OSL, allowing the aslts to execute fully on Windows. For the Unix OSL, 
  added 
  an alternate implementation of the semaphore timeout to allow aslts to 
  execute fully on Cygwin.
  
  ----------------------------------------
  20 March 2009. Summary of changes for version 20090320:
  
  1) ACPI CA Core Subsystem:
  
  Fixed a possible race condition between AcpiWalkNamespace and dynamic 
  table 
  unloads. Added a reader/writer locking mechanism to allow multiple 
  concurrent 
  namespace walks (readers), but block a dynamic table unload until it can 
  gain 
  exclusive write access to the namespace. This fixes a problem where a 
  table 
  unload could (possibly catastrophically) delete the portion of the 
  namespace 
  that is currently being examined by a walk. Adds a new file, utlock.c, 
  that 
  implements the reader/writer lock mechanism. ACPICA BZ 749.
  
  Fixed a regression introduced in version 20090220 where a change to the 
  FADT 
  handling could cause the ACPICA subsystem to access non-existent I/O 
  ports.
  
  Modified the handling of FADT register and table (FACS/DSDT) addresses. 
  The 
  FADT can contain both 32-bit and 64-bit versions of these addresses. 
  Previously, the 64-bit versions were favored, meaning that if both 32 and 
  64 
  versions were valid, but not equal, the 64-bit version was used. This was 
  found to cause some machines to fail. Now, in this case, the 32-bit 
  version 
  is used instead. This now matches the Windows behavior.
  
  Implemented a new mechanism to protect certain I/O ports. Provides 
  Microsoft 
  compatibility and protects the standard PC I/O ports from access via AML 
  code. Adds a new file, hwvalid.c
  
  Fixed a possible extraneous warning message from the FADT support. The 
  message warns of a 32/64 length mismatch between the legacy and GAS 
  definitions for a register.
  
  Removed the obsolete AcpiOsValidateAddress OSL interface. This interface 
  is 
  made obsolete by the port protection mechanism above. It was previously 
  used 
  to validate the entire address range of an operation region, which could 
  be 
  incorrect if the range included illegal ports, but fields within the 
  operation region did not actually access those ports. Validation is now 
  performed on a per-field basis instead of the entire region.
  
  Modified the handling of the PM1 Status Register ignored bit (bit 11.) 
  Ignored bits must be "preserved" according to the ACPI spec. Usually, 
  this 
  means a read/modify/write when writing to the register. However, for 
  status 
  registers, writing a one means clear the event. Writing a zero means 
  preserve 
  the event (do not clear.) This behavior is clarified in the ACPI 4.0 
  spec, 
  and the ACPICA code now simply always writes a zero to the ignored bit.
  
  Modified the handling of ignored bits for the PM1 A/B Control Registers. 
  As 
  per the ACPI specification, for the control registers, preserve 
  (read/modify/write) all bits that are defined as either reserved or 
  ignored.
  
  Updated the handling of write-only bits in the PM1 A/B Control Registers. 
  When reading the register, zero the write-only bits as per the ACPI spec. 
  ACPICA BZ 443. Lin Ming.
  
  Removed "Linux" from the list of supported _OSI strings. Linux no longer 
  wants to reply true to this request. The Windows strings are the only 
  paths 
  through the AML that are tested and known to work properly.
  
    Previous Release:
      Non-Debug Version:  82.0K Code, 17.5K Data,  99.5K Total
      Debug Version:     156.9K Code, 49.8K Data, 206.7K Total
    Current Release:
      Non-Debug Version:  82.6K Code, 17.6K Data, 100.2K Total
      Debug Version:     157.7K Code, 49.9K Data, 207.6K Total
  
  2) iASL Compiler/Disassembler and Tools:
  
  Acpiexec: Split the large aeexec.c file into two new files, aehandlers.c 
  and 
  aetables.c
  
  ----------------------------------------
  20 February 2009. Summary of changes for version 20090220:
  
  1) ACPI CA Core Subsystem:
  
  Optimized the ACPI register locking. Removed locking for reads from the 
  ACPI 
  bit registers in PM1 Status, Enable, Control, and PM2 Control. The lock 
  is 
  not required when reading the single-bit registers. The 
  AcpiGetRegisterUnlocked function is no longer needed and has been 
  removed. 
  This will improve performance for reads on these registers. ACPICA BZ 
  760.
  
  Fixed the parameter validation for AcpiRead/Write. Now return 
  AE_BAD_PARAMETER if the input register pointer is null, and 
  AE_BAD_ADDRESS 
  if 
  the register has an address of zero. Previously, these cases simply 
  returned 
  AE_OK. For optional registers such as PM1B status/enable/control, the 
  caller 
  should check for a valid register address before calling. ACPICA BZ 748.
  
  Renamed the external ACPI bit register access functions. Renamed 
  AcpiGetRegister and AcpiSetRegister to clarify the purpose of these 
  functions. The new names are AcpiReadBitRegister and 
  AcpiWriteBitRegister. 
  Also, restructured the code for these functions by simplifying the code 
  path 
  and condensing duplicate code to reduce code size.
  
  Added new functions to transparently handle the possibly split PM1 A/B 
  registers. AcpiHwReadMultiple and AcpiHwWriteMultiple. These two 
  functions 
  now handle the split registers for PM1 Status, Enable, and Control. 
  ACPICA 
  BZ 
  746.
  
  Added a function to handle the PM1 control registers, 
  AcpiHwWritePm1Control. 
  This function writes both of the PM1 control registers (A/B). These 
  registers 
  are different than the PM1 A/B status and enable registers in that 
  different 
  values can be written to the A/B registers. Most notably, the SLP_TYP 
  bits 
  can be different, as per the values returned from the _Sx predefined 
  methods.
  
  Removed an extra register write within AcpiHwClearAcpiStatus. This 
  function 
  was writing an optional PM1B status register twice. The existing call to 
  the 
  low-level AcpiHwRegisterWrite automatically handles a possibly split PM1 
  A/B 
  register. ACPICA BZ 751.
  
  Split out the PM1 Status registers from the FADT. Added new globals for 
  these 
  registers (A/B), similar to the way the PM1 Enable registers are handled. 
  Instead of overloading the FADT Event Register blocks. This makes the 
  code 
  clearer and less prone to error.
  
  Fixed the warning message for when the platform contains too many ACPI 
  tables 
  for the default size of the global root table data structure. The 
  calculation 
  for the truncation value was incorrect.
  
  Removed the ACPI_GET_OBJECT_TYPE macro. Removed all instances of this 
  obsolete macro, since it is now a simple reference to ->common.type. 
  There 
  were about 150 invocations of the macro across 41 files. ACPICA BZ 755.
  
  Removed the redundant ACPI_BITREG_SLEEP_TYPE_B. This type is the same as 
  TYPE_A. Removed this and all related instances. Renamed SLEEP_TYPE_A to 
  simply SLEEP_TYPE. ACPICA BZ 754.
  
  Conditionally compile the AcpiSetFirmwareWakingVector64 function. This 
  function is only needed on 64-bit host operating systems and is thus not 
  included for 32-bit hosts.
  
  Debug output: print the input and result for invocations of the _OSI 
  reserved 
  control method via the ACPI_LV_INFO debug level. Also, reduced some of 
  the 
  verbosity of this debug level. Len Brown.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a 
  much larger code and data size.
  
    Previous Release:
      Non-Debug Version:  82.3K Code, 17.5K Data,  99.8K Total
      Debug Version:     157.3K Code, 49.8K Data, 207.1K Total
    Current Release:
      Non-Debug Version:  82.0K Code, 17.5K Data,  99.5K Total
      Debug Version:     156.9K Code, 49.8K Data, 206.7K Total
  
  2) iASL Compiler/Disassembler and Tools:
  
  Disassembler: Decode the FADT PM_Profile field. Emit ascii names for the 
  various legal performance profiles.
  
  ----------------------------------------
  23 January 2009. Summary of changes for version 20090123:
  
  1) ACPI CA Core Subsystem:
  
  Added the 2009 copyright to all module headers and signons. This affects 
  virtually every file in the ACPICA core subsystem, the iASL compiler, and 
  the tools/utilities.
  
  Implemented a change to allow the host to override any ACPI table, 
  including 
  dynamically loaded tables. Previously, only the DSDT could be replaced by 
  the 
  host. With this change, the AcpiOsTableOverride interface is called for 
  each 
  table found in the RSDT/XSDT during ACPICA initialization, and also 
  whenever 
  a table is dynamically loaded via the AML Load operator.
  
  Updated FADT flag definitions, especially the Boot Architecture flags.
  
  Debugger: For the Find command, automatically pad the input ACPI name 
  with 
  underscores if the name is shorter than 4 characters. This enables a 
  match 
  with the actual namespace entry which is itself padded with underscores.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a 
  much larger code and data size.
  
    Previous Release:
      Non-Debug Version:  82.3K Code, 17.4K Data,  99.7K Total
      Debug Version:     157.1K Code, 49.7K Data, 206.8K Total
    Current Release:
      Non-Debug Version:  82.3K Code, 17.5K Data,  99.8K Total
      Debug Version:     157.3K Code, 49.8K Data, 207.1K Total
  
  2) iASL Compiler/Disassembler and Tools:
  
  Fix build error under Bison-2.4.
  
  Disassembler: Enhanced FADT support. Added decoding of the Boot
  Architecture
  flags. Now decode all flags, regardless of the FADT version. Flag output 
  includes the FADT version which first defined each flag.
  
  The iASL -g option now dumps the RSDT to a file (in addition to the FADT 
  and 
  DSDT). Windows only.
  
  ----------------------------------------
  04 December 2008. Summary of changes for version 20081204:
  
  1) ACPI CA Core Subsystem:
  
  The ACPICA Programmer Reference has been completely updated and revamped 
  for 
  this release. This includes updates to the external interfaces, OSL 
  interfaces, the overview sections, and the debugger reference.
  
  Several new ACPICA interfaces have been implemented and documented in the 
  programmer reference:
  AcpiReset - Writes the reset value to the FADT-defined reset register.
  AcpiDisableAllGpes - Disable all available GPEs.
  AcpiEnableAllRuntimeGpes - Enable all available runtime GPEs.
  AcpiGetGpeDevice - Get the GPE block device associated with a GPE.
  AcpiGbl_CurrentGpeCount - Tracks the current number of available GPEs.
  AcpiRead - Low-level read ACPI register (was HwLowLevelRead.)
  AcpiWrite - Low-level write ACPI register (was HwLowLevelWrite.)
  
  Most of the public ACPI hardware-related interfaces have been moved to a 
  new 
  file, components/hardware/hwxface.c
  
  Enhanced the FADT parsing and low-level ACPI register access: The ACPI 
  register lengths within the FADT are now used, and the low level ACPI 
  register access no longer hardcodes the ACPI register lengths. Given that 
  there may be some risk in actually trusting the FADT register lengths, a 
  run-
  time option was added to fall back to the default hardcoded lengths if 
  the 
  FADT proves to contain incorrect values - UseDefaultRegisterWidths. This 
  option is set to true for now, and a warning is issued if a suspicious 
  FADT 
  register length is overridden with the default value.
  
  Fixed a reference count issue in NsRepairObject. This problem was 
  introduced 
  in version 20081031 as part of a fix to repair Buffer objects within 
  Packages. Lin Ming.
  
  Added semaphore support to the Linux/Unix application OS-services layer 
  (OSL). ACPICA BZ 448. Lin Ming.
  
  Added the ACPI_MUTEX_TYPE configuration option to select whether mutexes 
  will 
  be implemented in the OSL, or will binary semaphores be used instead.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a 
  much larger code and data size.
  
    Previous Release:
      Non-Debug Version:  81.7K Code, 17.3K Data,  99.0K Total
      Debug Version:     156.4K Code, 49.4K Data, 205.8K Total
    Current Release:
      Non-Debug Version:  82.3K Code, 17.4K Data,  99.7K Total
      Debug Version:     157.1K Code, 49.7K Data, 206.8K Total
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Completed the '-e' option to include additional ACPI tables in 
  order 
  to 
  aid with disassembly and External statement generation. ACPICA BZ 742. 
  Lin 
  Ming.
  
  iASL: Removed the "named object in while loop" error. The compiler cannot 
  determine how many times a loop will execute. ACPICA BZ 730.
  
  Disassembler: Implemented support for FADT revision 2 (MS extension). 
  ACPICA 
  BZ 743.
  
  Disassembler: Updates for several ACPI data tables (HEST, EINJ, and 
  MCFG).
  
  ----------------------------------------
  31 October 2008. Summary of changes for version 20081031:
  
  1) ACPI CA Core Subsystem:
  
  Restructured the ACPICA header files into public/private. acpi.h now 
  includes 
  only the "public" acpica headers. All other acpica headers are "private" 
  and 
  should not be included by acpica users. One new file, accommon.h is used 
  to 
  include the commonly used private headers for acpica code generation. 
  Future 
  plans include moving all private headers to a new subdirectory.
  
  Implemented an automatic Buffer->String return value conversion for 
  predefined ACPI methods. For these methods (such as _BIF), added 
  automatic 
  conversion for return objects that are required to be a String, but a 
  Buffer 
  was found instead. This can happen when reading string battery data from 
  an 
  operation region, because it used to be difficult to convert the data 
  from 
  buffer to string from within the ASL. Ensures that the host OS is 
  provided 
  with a valid null-terminated string. Linux BZ 11822.
  
  Updated the FACS waking vector interfaces. Split 
  AcpiSetFirmwareWakingVector 
  into two: one for the 32-bit vector, another for the 64-bit vector. This 
  is 
  required because the host OS must setup the wake much differently for 
  each 
  vector (real vs. protected mode, etc.) and the interface itself should 
  not 
  be 
  deciding which vector to use. Also, eliminated the 
  GetFirmwareWakingVector 
  interface, as it served no purpose (only the firmware reads the vector, 
  OS 
  only writes the vector.) ACPICA BZ 731.
  
  Implemented a mechanism to escape infinite AML While() loops. Added a 
  loop 
  counter to force exit from AML While loops if the count becomes too 
  large. 
  This can occur in poorly written AML when the hardware does not respond 
  within a while loop and the loop does not implement a timeout. The 
  maximum 
  loop count is configurable. A new exception code is returned when a loop 
  is 
  broken, AE_AML_INFINITE_LOOP. Alexey Starikovskiy, Bob Moore.
  
  Optimized the execution of AML While loops. Previously, a control state 
  object was allocated and freed for each execution of the loop. The 
  optimization is to simply reuse the control state for each iteration. 
  This 
  speeds up the raw loop execution time by about 5%.
  
  Enhanced the implicit return mechanism. For Windows compatibility, return 
  an 
  implicit integer of value zero for methods that contain no executable 
  code. 
  Such methods are seen in the field as stubs (presumably), and can cause 
  drivers to fail if they expect a return value. Lin Ming.
  
  Allow multiple backslashes as root prefixes in namepaths. In a fully 
  qualified namepath, allow multiple backslash prefixes. This can happen 
  (and 
  is seen in the field) because of the use of a double-backslash in strings 
  (since backslash is the escape character) causing confusion. ACPICA BZ 
  739 
  Lin Ming.
  
  Emit a warning if two different FACS or DSDT tables are discovered in the 
  FADT. Checks if there are two valid but different addresses for the FACS 
  and 
  DSDT within the FADT (mismatch between the 32-bit and 64-bit fields.)
  
  Consolidated the method argument count validation code. Merged the code 
  that 
  validates control method argument counts into the predefined validation 
  module. Eliminates possible multiple warnings for incorrect argument 
  counts.
  
  Implemented ACPICA example code. Includes code for ACPICA initialization, 
  handler installation, and calling a control method. Available at 
  source/tools/examples.
  
  Added a global pointer for FACS table to simplify internal FACS access. 
  Use 
  the global pointer instead of using AcpiGetTableByIndex for each FACS 
  access. 
  This simplifies the code for the Global Lock and the Firmware Waking 
  Vector(s).
  
  Example Code and Data Size: These are the sizes for the OS-independent 
  acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
  debug version of the code includes the debug output trace mechanism and 
  has a 
  much larger code and data size.
  
    Previous Release:
      Non-Debug Version:  81.2K Code, 17.0K Data,  98.2K Total
      Debug Version:     155.8K Code, 49.1K Data, 204.9K Total
    Current Release:
      Non-Debug Version:  81.7K Code, 17.3K Data,  99.0K Total
      Debug Version:     156.4K Code, 49.4K Data, 205.8K Total
  
  2) iASL Compiler/Disassembler and Tools:
  
  iASL: Improved disassembly of external method calls. Added the -e option 
  to 
  allow the inclusion of additional ACPI tables to help with the 
  disassembly 
  of 
  method invocations and the generation of external declarations during the 
  disassembly. Certain external method invocations cannot be disassembled 
  properly without the actual declaration of the method. Use the -e option 
  to 
  include the table where the external method(s) are actually declared. 
  Most 
  useful for disassembling SSDTs that make method calls back to the master 
  DSDT. Lin Ming. Example: To disassemble an SSDT with calls to DSDT:  iasl 
  -d 
  -e dsdt.aml ssdt1.aml
  
  iASL: Fix to allow references to aliases within ASL namepaths. Fixes a 
  problem where the use of an alias within a namepath would result in a not 
  found error or cause the compiler to fault. Also now allows forward 
  references from the Alias operator itself. ACPICA BZ 738.
  
  ----------------------------------------
  26 September 2008. Summary of changes for version 20080926:
  
  1) ACPI CA Core Subsystem:
  
  Designed and implemented a mechanism to validate predefined ACPI methods 
  and 
  objects. This code validates the predefined ACPI objects (objects whose 
  names 
  start with underscore) that appear in the namespace, at the time they are 
  evaluated. The argument count and the type of the returned object are 
  validated against the ACPI specification. The purpose of this validation 
  is 
  to detect problems with the BIOS-implemented predefined ACPI objects 
  before 
  the results are returned to the ACPI-related drivers. Future enhancements 
  may 
  include actual repair of incorrect return objects where possible. Two new 
  files are nspredef.c and acpredef.h.
  
  Fixed a fault in the AML parser if a memory allocation fails during the 
  Op 
  completion routine AcpiPsCompleteThisOp. Lin Ming. ACPICA BZ 492.
  
  Fixed an issue with implicit return compatibility. This change improves 
  the 
  implicit return mechanism to be more compatible with the MS interpreter. 
  Lin 
  Ming, ACPICA BZ 349.
  
  Implemented support for zero-length buffer-to-string conversions. Allow 
  zero 
  length strings during interpreter buffer-to-string conversions. For 
  example, 
  during the ToDecimalString and ToHexString operators, as well as implicit 
  conversions. Fiodor Suietov, ACPICA BZ 585.
  
  Fixed two possible memory leaks in the error exit paths of 
  AcpiUtUpdateObjectReference and AcpiUtWalkPackageTree. These functions 
  are 
  similar in that they use a stack of state objects in order to eliminate 
  recursion. The stack must be fully unwound and deallocated if an error 
  occurs. Lin Ming. ACPICA BZ 383.
  
  Removed the unused ACPI_BITREG_WAKE_ENABLE definition and entry in the 
  global 
  ACPI register table. This bit does not exist and is unused. Lin Ming, Bob 
  Moore ACPICA BZ 442.
  
  Removed the obsolete version number in module headers. Removed the 
  "$Revision" number that appeared in each module header. This version 
  number 
  was useful under SourceSafe and CVS, but has no meaning under git. It is 
  not 
  only incorrect, it could also be misleading.
  
  Example Code and Data Size: These are the sizes for the OS-independent 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
 debug version of the code includes the debug output trace mechanism and 
 has a 
 much larger code and data size.
 
   Previous Release:
     Non-Debug Version:  79.7K Code, 16.4K Data,  96.1K Total
     Debug Version:     153.7K Code, 48.2K Data, 201.9K Total
   Current Release:
     Non-Debug Version:  81.2K Code, 17.0K Data,  98.2K Total
     Debug Version:     155.8K Code, 49.1K Data, 204.9K Total
 
 ----------------------------------------
 29 August 2008. Summary of changes for version 20080829:
 
 1) ACPI CA Core Subsystem:
 
 Completed a major cleanup of the internal ACPI_OPERAND_OBJECT of type 
 Reference. Changes include the elimination of cheating on the Object 
 field 
 for the DdbHandle subtype, addition of a reference class field to 
 differentiate the various reference types (instead of an AML opcode), and 
 the 
 cleanup of debug output for this object. Lin Ming, Bob Moore. BZ 723
 
 Reduce an error to a warning for an incorrect method argument count. 
 Previously aborted with an error if too few arguments were passed to a 
 control method via the external ACPICA interface. Now issue a warning 
 instead 
 and continue. Handles the case where the method inadvertently declares 
 too 
 many arguments, but does not actually use the extra ones. Applies mainly 
 to 
 the predefined methods. Lin Ming. Linux BZ 11032.
 
 Disallow the evaluation of named object types with no intrinsic value. 
 Return 
 AE_TYPE for objects that have no value and therefore evaluation is 
 undefined: 
 Device, Event, Mutex, Region, Thermal, and Scope. Previously, evaluation 
 of 
 these types were allowed, but an exception would be generated at some 
 point 
 during the evaluation. Now, the error is generated up front.
 
 Fixed a possible memory leak in the AcpiNsGetExternalPathname function 
 (nsnames.c). Fixes a leak in the error exit path.
 
 Removed the obsolete debug levels ACPI_DB_WARN and ACPI_DB_ERROR. These 
 debug 
 levels were made obsolete by the ACPI_WARNING, ACPI_ERROR, and 
 ACPI_EXCEPTION 
 interfaces. Also added ACPI_DB_EVENTS to correspond with the existing 
 ACPI_LV_EVENTS.
 
 Removed obsolete and/or unused exception codes from the acexcep.h header. 
 There is the possibility that certain device drivers may be affected if 
 they 
 use any of these exceptions.
 
 The ACPICA documentation has been added to the public git source tree, 
 under 
 acpica/documents. Included are the ACPICA programmer reference, the iASL 
 compiler reference, and the changes.txt release logfile.
 
 Example Code and Data Size: These are the sizes for the OS-independent 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
 debug version of the code includes the debug output trace mechanism and 
 has a 
 much larger code and data size.
 
   Previous Release:
     Non-Debug Version:  79.7K Code, 16.4K Data,  96.1K Total
     Debug Version:     153.9K Code, 48.4K Data, 202.3K Total
   Current Release:
     Non-Debug Version:  79.7K Code, 16.4K Data,  96.1K Total
     Debug Version:     153.7K Code, 48.2K Data, 201.9K Total
 
 2) iASL Compiler/Disassembler and Tools:
 
 Allow multiple argument counts for the predefined _SCP method. ACPI 3.0 
 defines _SCP with 3 arguments. Previous versions defined it with only 1 
 argument. iASL now allows both definitions.
 
 iASL/disassembler: avoid infinite loop on bad ACPI tables. Check for 
 zero-
 length subtables when disassembling ACPI tables. Also fixed a couple of 
 errors where a full 16-bit table type field was not extracted from the 
 input 
 properly.
 
 acpisrc: Improve comment counting mechanism for generating source code 
 statistics. Count first and last lines of multi-line comments as 
 whitespace, 
 not comment lines. Handle Linux legal header in addition to standard 
 acpica 
 header.
 
 ----------------------------------------
 
 29 July 2008. Summary of changes for version 20080729:
 
 1) ACPI CA Core Subsystem:
 
 Fix a possible deadlock in the GPE dispatch. Remove call to 
 AcpiHwDisableAllGpes during wake in AcpiEvGpeDispatch. This call will 
 attempt 
 to acquire the GPE lock but can deadlock since the GPE lock is already 
 held 
 at dispatch time. This code was introduced in version 20060831 as a 
 response 
 to Linux BZ 6881 and has since been removed from Linux.
 
 Add a function to dereference returned reference objects. Examines the 
 return 
 object from a call to AcpiEvaluateObject. Any Index or RefOf references 
 are 
 automatically dereferenced in an attempt to return something useful 
 (these 
 reference types cannot be converted into an external ACPI_OBJECT.) 
 Provides 
 MS compatibility. Lin Ming, Bob Moore. Linux BZ 11105
 
 x2APIC support: changes for MADT and SRAT ACPI tables. There are 2 new 
 subtables for the MADT and one new subtable for the SRAT. Includes 
 disassembler and AcpiSrc support. Data from the Intel 64 Architecture 
 x2APIC 
 Specification, June 2008.
 
 Additional error checking for pathname utilities. Add error check after 
 all 
 calls to AcpiNsGetPathnameLength. Add status return from 
 AcpiNsBuildExternalPath and check after all calls. Add parameter 
 validation 
 to AcpiUtInitializeBuffer. Reported by and initial patch by Ingo Molnar.
 
 Return status from the global init function AcpiUtGlobalInitialize. This 
 is 
 used by both the kernel subsystem and the utilities such as iASL 
 compiler. 
 The function could possibly fail when the caches are initialized. Yang 
 Yi.
 
 Add a function to decode reference object types to strings. Created for 
 improved error messages. 
 
 Improve object conversion error messages. Better error messages during 
 object 
 conversion from internal to the external ACPI_OBJECT. Used for external 
 calls 
 to AcpiEvaluateObject.
 
 Example Code and Data Size: These are the sizes for the OS-independent 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
 debug version of the code includes the debug output trace mechanism and 
 has a 
 much larger code and data size.
 
   Previous Release:
     Non-Debug Version:  79.6K Code, 16.2K Data,  95.8K Total
     Debug Version:     153.5K Code, 48.2K Data, 201.7K Total
   Current Release:
     Non-Debug Version:  79.7K Code, 16.4K Data,  96.1K Total
     Debug Version:     153.9K Code, 48.4K Data, 202.3K Total
 
 2) iASL Compiler/Disassembler and Tools:
 
 Debugger: fix a possible hang when evaluating non-methods. Fixes a 
 problem 
 introduced in version 20080701. If the object being evaluated (via 
 execute 
 command) is not a method, the debugger can hang while trying to obtain 
 non-
 existent parameters.
 
 iASL: relax error for using reserved "_T_x" identifiers. These names can 
 appear in a disassembled ASL file if they were emitted by the original 
 compiler. Instead of issuing an error or warning and forcing the user to 
 manually change these names, issue a remark instead.
 
 iASL: error if named object created in while loop. Emit an error if any 
 named 
 object is created within a While loop. If allowed, this code will 
 generate 
 a 
 run-time error on the second iteration of the loop when an attempt is 
 made 
 to 
 create the same named object twice. ACPICA bugzilla 730.
 
 iASL: Support absolute pathnames for include files. Add support for 
 absolute 
 pathnames within the Include operator. previously, only relative 
 pathnames 
 were supported.
 
 iASL: Enforce minimum 1 interrupt in interrupt macro and Resource 
 Descriptor. 
 The ACPI spec requires one interrupt minimum. BZ 423
 
 iASL: Handle a missing ResourceSource arg, with a present SourceIndex. 
 Handles the case for the Interrupt Resource Descriptor where
 the ResourceSource argument is omitted but ResourceSourceIndex
 is present. Now leave room for the Index. BZ 426
 
 iASL: Prevent error message if CondRefOf target does not exist. Fixes 
 cases 
 where an error message is emitted if the target does not exist. BZ 516
 
 iASL: Fix broken -g option (get Windows ACPI tables). Fixes the -g option 
 (get ACPI tables on Windows). This was apparently broken in version 
 20070919.
 
 AcpiXtract: Handle EOF while extracting data. Correctly handle the case 
 where 
 the EOF happens immediately after the last table in the input file. Print 
 completion message. Previously, no message was displayed in this case.
 
 ----------------------------------------
 01 July 2008. Summary of changes for version 20080701:
 
 0) Git source tree / acpica.org
 
 Fixed a problem where a git-clone from http would not transfer the entire 
 source tree.
 
 1) ACPI CA Core Subsystem:
 
 Implemented a "careful" GPE disable in AcpiEvDisableGpe, only modify one 
 enable bit. Now performs a read-change-write of the enable register 
 instead 
 of simply writing out the cached enable mask. This will prevent 
 inadvertent 
 enabling of GPEs if a rogue GPE is received during initialization (before 
 GPE 
 handlers are installed.)
 
 Implemented a copy for dynamically loaded tables. Previously, dynamically 
 loaded tables were simply mapped - but on some machines this memory is 
 corrupted after suspend. Now copy the table to a local buffer. For the 
 OpRegion case, added checksum verify. Use the table length from the table 
 header, not the region length. For the Buffer case, use the table length 
 also. Dennis Noordsij, Bob Moore. BZ 10734
 
 Fixed a problem where the same ACPI table could not be dynamically loaded 
 and 
 unloaded more than once. Without this change, a table cannot be loaded 
 again 
 once it has been loaded/unloaded one time. The current mechanism does not 
 unregister a table upon an unload. During a load, if the same table is 
 found, 
 this no longer returns an exception. BZ 722
 
 Fixed a problem where the wrong descriptor length was calculated for the 
 EndTag descriptor in 64-bit mode. The "minimal" descriptors such as 
 EndTag 
 are calculated as 12 bytes long, but the actual length in the internal 
 descriptor is 16 because of the round-up to 8 on the 64-bit build. 
 Reported 
 by Linn Crosetto. BZ 728
 
 Fixed a possible memory leak in the Unload operator. The DdbHandle 
 returned 
 by Load() did not have its reference count decremented during unload, 
 leading 
 to a memory leak. Lin Ming. BZ 727
 
 Fixed a possible memory leak when deleting thermal/processor objects. Any 
 associated notify handlers (and objects) were not being deleted. Fiodor 
 Suietov. BZ 506
 
 Fixed the ordering of the ASCII names in the global mutex table to match 
 the 
 actual mutex IDs. Used by AcpiUtGetMutexName, a function used for debug 
 only. 
 Vegard Nossum. BZ 726
 
 Enhanced the AcpiGetObjectInfo interface to return the number of required 
 arguments if the object is a control method. Added this call to the 
 debugger 
 so the proper number of default arguments are passed to a method. This 
 prevents a warning when executing methods from AcpiExec.
 
 Added a check for an invalid handle in AcpiGetObjectInfo. Return 
 AE_BAD_PARAMETER if input handle is invalid. BZ 474
 
 Fixed an extraneous warning from exconfig.c on the 64-bit build.
 
 Example Code and Data Size: These are the sizes for the OS-independent 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
 debug version of the code includes the debug output trace mechanism and 
 has a 
 much larger code and data size.
 
   Previous Release:
     Non-Debug Version:  79.3K Code, 16.2K Data,  95.5K Total
     Debug Version:     153.0K Code, 48.2K Data, 201.2K Total
   Current Release:
     Non-Debug Version:  79.6K Code, 16.2K Data,  95.8K Total
     Debug Version:     153.5K Code, 48.2K Data, 201.7K Total
 
 2) iASL Compiler/Disassembler and Tools:
 
 iASL: Added two missing ACPI reserved names. Added _MTP and _ASZ, both 
 resource descriptor names.
 
 iASL: Detect invalid ASCII characters in input (windows version). Removed 
 the 
 "-CF" flag from the flex compile, enables correct detection of non-ASCII 
 characters in the input. BZ 441
 
 iASL: Eliminate warning when result of LoadTable is not used. Eliminate 
 the 
 "result of operation not used" warning when the DDB handle returned from 
 LoadTable is not used. The warning is not needed. BZ 590
 
 AcpiExec: Add support for dynamic table load/unload. Now calls _CFG 
 method 
 to 
 pass address of table to the AML. Added option to disable OpRegion 
 simulation 
 to allow creation of an OpRegion with a real address that was passed to 
 _CFG. 
 All of this allows testing of the Load and Unload operators from 
 AcpiExec.
 
 Debugger: update tables command for unloaded tables. Handle unloaded 
 tables 
 and use the standard table header output routine.
 
 ----------------------------------------
 09 June 2008. Summary of changes for version 20080609:
 
 1) ACPI CA Core Subsystem:
 
 Implemented a workaround for reversed _PRT entries. A significant number 
 of 
 BIOSs erroneously reverse the _PRT SourceName and the SourceIndex. This 
 change dynamically detects and repairs this problem. Provides 
 compatibility 
 with MS ACPI. BZ 6859
 
 Simplified the internal ACPI hardware interfaces to eliminate the locking 
 flag parameter from Register Read/Write. Added a new external interface, 
 AcpiGetRegisterUnlocked.
 
 Fixed a problem where the invocation of a GPE control method could hang. 
 This 
 was a regression introduced in 20080514. The new method argument count 
 validation mechanism can enter an infinite loop when a GPE method is 
 dispatched. Problem fixed by removing the obsolete code that passed GPE 
 block 
 information to the notify handler via the control method parameter 
 pointer.
 
 Fixed a problem where the _SST execution status was incorrectly returned 
 to 
 the caller of AcpiEnterSleepStatePrep. This was a regression introduced 
 in 
 20080514. _SST is optional and a NOT_FOUND exception should never be 
 returned. BZ 716
 
 Fixed a problem where a deleted object could be accessed from within the 
 AML 
 parser. This was a regression introduced in version 20080123 as a fix for 
 the 
 Unload operator. Lin Ming. BZ 10669
 
 Cleaned up the debug operand dump mechanism. Eliminated unnecessary 
 operands 
 and eliminated the use of a negative index in a loop. Operands are now 
 displayed in the correct order, not backwards. This also fixes a 
 regression 
 introduced in 20080514 on 64-bit systems where the elimination of 
 ACPI_NATIVE_UINT caused the negative index to go large and positive. BZ 
 715
 
 Fixed a possible memory leak in EvPciConfigRegionSetup where the error 
 exit 
 path did not delete a locally allocated structure.
 
 Updated definitions for the DMAR and SRAT tables to synchronize with the 
 current specifications. Includes disassembler support.
 
 Fixed a problem in the mutex debug code (in utmutex.c) where an incorrect 
 loop termination value was used. Loop terminated on iteration early, 
 missing 
 one mutex. Linn Crosetto
 
 Example Code and Data Size: These are the sizes for the OS-independent 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
 debug version of the code includes the debug output trace mechanism and 
 has a 
 much larger code and data size.
 
   Previous Release:
     Non-Debug Version:  79.5K Code, 16.2K Data,  95.7K Total
     Debug Version:     153.3K Code, 48.3K Data, 201.6K Total
   Current Release:
     Non-Debug Version:  79.3K Code, 16.2K Data,  95.5K Total
     Debug Version:     153.0K Code, 48.2K Data, 201.2K Total
 
 2) iASL Compiler/Disassembler and Tools:
 
 Disassembler: Implemented support for EisaId() within _CID objects. Now 
 disassemble integer _CID objects back to EisaId invocations, including 
 multiple integers within _CID packages. Includes single-step support for 
 debugger also.
 
 Disassembler: Added support for DMAR and SRAT table definition changes.
 
 ----------------------------------------
 14 May 2008. Summary of changes for version 20080514:
 
 1) ACPI CA Core Subsystem:
 
 Fixed a problem where GPEs were enabled too early during the ACPICA 
 initialization. This could lead to "handler not installed" errors on some 
 machines. Moved GPE enable until after _REG/_STA/_INI methods are run. 
 This 
 ensures that all operation regions and devices throughout the namespace 
 have 
 been initialized before GPEs are enabled. Alexey Starikovskiy, BZ 9916.
 
 Implemented a change to the enter sleep code. Moved execution of the _GTS 
 method to just before setting sleep enable bit. The execution was moved 
 from 
 AcpiEnterSleepStatePrep to AcpiEnterSleepState. _GTS is now executed 
 immediately before the SLP_EN bit is set, as per the ACPI specification. 
 Luming Yu, BZ 1653.
 
 Implemented a fix to disable unknown GPEs (2nd version). Now always 
 disable 
 the GPE, even if ACPICA thinks that that it is already disabled. It is 
 possible that the AML or some other code has enabled the GPE unbeknownst 
 to 
 the ACPICA code.
 
 Fixed a problem with the Field operator where zero-length fields would 
 return 
 an AE_AML_NO_OPERAND exception during table load. Fix enables zero-length 
 ASL 
 field declarations in Field(), BankField(), and IndexField(). BZ 10606.
 
 Implemented a fix for the Load operator, now load the table at the 
 namespace 
 root. This reverts a change introduced in version 20071019. The table is 
 now 
 loaded at the namespace root even though this goes against the ACPI 
 specification. This provides compatibility with other ACPI 
 implementations. 
 The ACPI specification will be updated to reflect this in ACPI 4.0. Lin 
 Ming.
 
 Fixed a problem where ACPICA would not Load() tables with unusual 
 signatures. 
 Now ignore ACPI table signature for Load() operator. Only "SSDT" is 
 acceptable to the ACPI spec, but tables are seen with OEMx and null sigs. 
 Therefore, signature validation is worthless. Apparently MS ACPI accepts 
 such 
 signatures, ACPICA must be compatible. BZ 10454.
 
 Fixed a possible negative array index in AcpiUtValidateException. Added 
 NULL 
 fields to the exception string arrays to eliminate a -1 subtraction on 
 the 
 SubStatus field.
 
 Updated the debug tracking macros to reduce overall code and data size. 
 Changed ACPI_MODULE_NAME and ACPI_FUNCTION_NAME to use arrays of strings 
 instead of pointers to static strings. Jan Beulich and Bob Moore.
 
 Implemented argument count checking in control method invocation via 
 AcpiEvaluateObject. Now emit an error if too few arguments, warning if 
 too 
 many. This applies only to extern programmatic control method execution, 
 not 
 method-to-method calls within the AML. Lin Ming.
 
 Eliminated the ACPI_NATIVE_UINT type across all ACPICA code. This type is 
 no 
 longer needed, especially with the removal of 16-bit support. It was 
 replaced 
 mostly with UINT32, but also ACPI_SIZE where a type that changes 32/64 
 bit 
 on 
 32/64-bit platforms is required.
 
 Added the C const qualifier for appropriate string constants -- mostly 
 MODULE_NAME and printf format strings. Jan Beulich.
 
 Example Code and Data Size: These are the sizes for the OS-independent 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
 debug version of the code includes the debug output trace mechanism and 
 has a 
 much larger code and data size.
 
   Previous Release:
     Non-Debug Version:  80.0K Code, 17.4K Data,  97.4K Total
     Debug Version:     159.4K Code, 64.4K Data, 223.8K Total
   Current Release:
     Non-Debug Version:  79.5K Code, 16.2K Data,  95.7K Total
     Debug Version:     153.3K Code, 48.3K Data, 201.6K Total
 
 2) iASL Compiler/Disassembler and Tools:
 
 Implemented ACPI table revision ID validation in the disassembler. Zero 
 is 
 always invalid. For DSDTs, the ID controls the interpreter integer width. 
 1 
 means 32-bit and this is unusual. 2 or greater is 64-bit.
 
 ----------------------------------------
 21 March 2008. Summary of changes for version 20080321:
 
 1) ACPI CA Core Subsystem:
 
 Implemented an additional change to the GPE support in order to suppress 
 spurious or stray GPEs. The AcpiEvDisableGpe function will now 
 permanently 
 disable incoming GPEs that are neither enabled nor disabled -- meaning 
 that 
 the GPE is unknown to the system. This should prevent future interrupt 
 floods 
 from that GPE. BZ 6217 (Zhang Rui)
 
 Fixed a problem where NULL package elements were not returned to the 
 AcpiEvaluateObject interface correctly. The element was simply ignored 
 instead of returning a NULL ACPI_OBJECT package element, potentially 
 causing 
 a buffer overflow and/or confusing the caller who expected a fixed number 
 of 
 elements. BZ 10132 (Lin Ming, Bob Moore)
 
 Fixed a problem with the CreateField, CreateXXXField (Bit, Byte, Word, 
 Dword, 
 Qword), Field, BankField, and IndexField operators when invoked from 
 inside 
 an executing control method. In this case, these operators created 
 namespace 
 nodes that were incorrectly left marked as permanent nodes instead of 
 temporary nodes. This could cause a problem if there is race condition 
 between an exiting control method and a running namespace walk. (Reported 
 by 
 Linn Crosetto)
 
 Fixed a problem where the CreateField and CreateXXXField operators would 
 incorrectly allow duplicate names (the name of the field) with no 
 exception 
 generated.
 
 Implemented several changes for Notify handling. Added support for new 
 Notify 
 values (ACPI 2.0+) and improved the Notify debug output. Notify on 
 PowerResource objects is no longer allowed, as per the ACPI 
 specification. 
 (Bob Moore, Zhang Rui)
 
 All Reference Objects returned via the AcpiEvaluateObject interface are 
 now 
 marked as type "REFERENCE" instead of "ANY". The type ANY is now reserved 
 for 
 NULL objects - either NULL package elements or unresolved named 
 references.
 
 Fixed a problem where an extraneous debug message was produced for 
 package 
 objects (when debugging enabled). The message "Package List length larger 
 than NumElements count" is now produced in the correct case, and is now 
 an 
 error message rather than a debug message. Added a debug message for the 
 opposite case, where NumElements is larger than the Package List (the 
 package 
 will be padded out with NULL elements as per the ACPI spec.)
 
 Implemented several improvements for the output of the ASL "Debug" object 
 to 
 clarify and keep all data for a given object on one output line.
 
 Fixed two size calculation issues with the variable-length Start 
 Dependent 
 resource descriptor.
 
 Example Code and Data Size: These are the sizes for the OS-independent 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
 debug version of the code includes the debug output trace mechanism and 
 has 
 a much larger code and data size.
 
   Previous Release:
     Non-Debug Version:  79.7K Code, 17.3K Data,  97.0K Total
     Debug Version:     158.9K Code, 64.0K Data, 222.9K Total
   Current Release:
     Non-Debug Version:  80.0K Code, 17.4K Data,  97.4K Total
     Debug Version:     159.4K Code, 64.4K Data, 223.8K Total
 
 2) iASL Compiler/Disassembler and Tools:
 
 Fixed a problem with the use of the Switch operator where execution of 
 the 
 containing method by multiple concurrent threads could cause an 
 AE_ALREADY_EXISTS exception. This is caused by the fact that there is no 
 actual Switch opcode, it must be simulated with local named temporary 
 variables and if/else pairs. The solution chosen was to mark any method 
 that 
 uses Switch as Serialized, thus preventing multiple thread entries. BZ 
 469.
 
 ----------------------------------------
 13 February 2008. Summary of changes for version 20080213:
 
 1) ACPI CA Core Subsystem:
 
 Implemented another MS compatibility design change for GPE/Notify 
 handling. 
 GPEs are now cleared/enabled asynchronously to allow all pending notifies 
 to 
 complete first. It is expected that the OSL will queue the enable request 
 behind all pending notify requests (may require changes to the local host 
 OSL 
 in AcpiOsExecute). Alexey Starikovskiy.
 
 Fixed a problem where buffer and package objects passed as arguments to a 
 control method via the external AcpiEvaluateObject interface could cause 
 an 
 AE_AML_INTERNAL exception depending on the order and type of operators 
 executed by the target control method.
 
 Fixed a problem where resource descriptor size optimization could cause a 
 problem when a _CRS resource template is passed to a _SRS method. The 
 _SRS 
 resource template must use the same descriptors (with the same size) as 
 returned from _CRS. This change affects the following resource 
 descriptors: 
 IRQ / IRQNoFlags and StartDependendentFn / StartDependentFnNoPri. (BZ 
 9487)
 
 Fixed a problem where a CopyObject to RegionField, BankField, and 
 IndexField 
 objects did not perform an implicit conversion as it should. These types 
 must 
 retain their initial type permanently as per the ACPI specification. 
 However, 
 a CopyObject to all other object types should not perform an implicit 
 conversion, as per the ACPI specification. (Lin Ming, Bob Moore) BZ 388
 
 Fixed a problem with the AcpiGetDevices interface where the mechanism to 
 match device CIDs did not examine the entire list of available CIDs, but 
 instead aborted on the first non-matching CID. Andrew Patterson.
 
 Fixed a regression introduced in version 20071114. The ACPI_HIDWORD macro 
 was 
 inadvertently changed to return a 16-bit value instead of a 32-bit value, 
 truncating the upper dword of a 64-bit value. This macro is only used to 
 display debug output, so no incorrect calculations were made. Also, 
 reimplemented the macro so that a 64-bit shift is not performed by 
 inefficient compilers.
 
 Added missing va_end statements that should correspond with each va_start 
 statement.
 
 Example Code and Data Size: These are the sizes for the OS-independent 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
 debug version of the code includes the debug output trace mechanism and 
 has 
 a much larger code and data size.
 
   Previous Release:
     Non-Debug Version:  79.5K Code, 17.2K Data,  96.7K Total
     Debug Version:     159.0K Code, 63.8K Data, 222.8K Total
   Current Release:
     Non-Debug Version:  79.7K Code, 17.3K Data,  97.0K Total
     Debug Version:     158.9K Code, 64.0K Data, 222.9K Total
 
 2) iASL Compiler/Disassembler and Tools:
 
 Implemented full disassembler support for the following new ACPI tables: 
 BERT, EINJ, and ERST. Implemented partial disassembler support for the 
 complicated HEST table. These tables support the Windows Hardware Error 
 Architecture (WHEA).
 
 ----------------------------------------
 23 January 2008. Summary of changes for version 20080123:
 
 1) ACPI CA Core Subsystem:
 
 Added the 2008 copyright to all module headers and signons. This affects 
 virtually every file in the ACPICA core subsystem, the iASL compiler, and 
 the tools/utilities.
 
 Fixed a problem with the SizeOf operator when used with Package and 
 Buffer 
 objects. These objects have deferred execution for some arguments, and 
 the 
 execution is now completed before the SizeOf is executed. This problem 
 caused 
 unexpected AE_PACKAGE_LIMIT errors on some systems (Lin Ming, Bob Moore) 
 BZ 
 9558
 
 Implemented an enhancement to the interpreter "slack mode". In the 
 absence 
 of 
 an explicit return or an implicitly returned object from the last 
 executed 
 opcode, a control method will now implicitly return an integer of value 0 
 for 
 Microsoft compatibility. (Lin Ming) BZ 392
 
 Fixed a problem with the Load operator where an exception was not 
 returned 
 in 
 the case where the table is already loaded. (Lin Ming) BZ 463
 
 Implemented support for the use of DDBHandles as an Indexed Reference, as 
 per 
 the ACPI spec. (Lin Ming) BZ 486
 
 Implemented support for UserTerm (Method invocation) for the Unload 
 operator 
 as per the ACPI spec. (Lin Ming) BZ 580
 
 Fixed a problem with the LoadTable operator where the OemId and 
 OemTableId 
 input strings could cause unexpected failures if they were shorter than 
 the 
 maximum lengths allowed. (Lin Ming, Bob Moore) BZ 576
 
 Implemented support for UserTerm (Method invocation) for the Unload 
 operator 
 as per the ACPI spec. (Lin Ming) BZ 580
 
 Implemented header file support for new ACPI tables - BERT, ERST, EINJ, 
 HEST, 
 IBFT, UEFI, WDAT. Disassembler support is forthcoming.
 
 Example Code and Data Size: These are the sizes for the OS-independent 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
 debug version of the code includes the debug output trace mechanism and 
 has 
 a much larger code and data size.
 
   Previous Release:
     Non-Debug Version:  79.3K Code, 17.2K Data,  96.5K Total
     Debug Version:     158.6K Code, 63.8K Data, 222.4K Total
   Current Release:
     Non-Debug Version:  79.5K Code, 17.2K Data,  96.7K Total
     Debug Version:     159.0K Code, 63.8K Data, 222.8K Total
 
 2) iASL Compiler/Disassembler and Tools:
 
 Implemented support in the disassembler for checksum validation on 
 incoming 
 binary DSDTs and SSDTs. If incorrect, a message is displayed within the 
 table 
 header dump at the start of the disassembly.
 
 Implemented additional debugging information in the namespace listing 
 file 
 created during compilation. In addition to the namespace hierarchy, the 
 full 
 pathname to each namespace object is displayed.
 
 Fixed a problem with the disassembler where invalid ACPI tables could 
 cause 
 faults or infinite loops.
 
 Fixed an unexpected parse error when using the optional "parameter types" 
 list in a control method declaration. (Lin Ming) BZ 397
 
 Fixed a problem where two External declarations with the same name did 
 not 
 cause an error (Lin Ming) BZ 509
 
 Implemented support for full TermArgs (adding Argx, Localx and method 
 invocation) for the ParameterData parameter to the LoadTable operator. 
 (Lin 
 Ming) BZ 583,587
 
 ----------------------------------------
 19 December 2007. Summary of changes for version 20071219:
 
 1) ACPI CA Core Subsystem:
 
 Implemented full support for deferred execution for the TermArg string 
 arguments for DataTableRegion. This enables forward references and full 
 operand resolution for the three string arguments. Similar to 
 OperationRegion 
 deferred argument execution.) Lin Ming. BZ 430
 
 Implemented full argument resolution support for the BankValue argument 
 to 
 BankField. Previously, only constants were supported, now any TermArg may 
 be 
 used. Lin Ming BZ 387, 393
 
 Fixed a problem with AcpiGetDevices where the search of a branch of the 
 device tree could be terminated prematurely. In accordance with the ACPI 
 specification, the search down the current branch is terminated if a 
 device 
 is both not present and not functional (instead of just not present.) 
 Yakui 
 Zhao.
 
 Fixed a problem where "unknown" GPEs could be allowed to fire repeatedly 
 if 
 the underlying AML code changed the GPE enable registers. Now, any 
 unknown 
 incoming GPE (no _Lxx/_Exx method and not the EC GPE) is immediately 
 disabled 
 instead of simply ignored. Rui Zhang.
 
 Fixed a problem with Index Fields where the Index register was 
 incorrectly 
 limited to a maximum of 32 bits. Now any size may be used.
 
 Fixed a couple memory leaks associated with "implicit return" objects 
 when 
 the AML Interpreter slack mode is enabled. Lin Ming BZ 349
 
 Example Code and Data Size: These are the sizes for the OS-independent 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
 debug version of the code includes the debug output trace mechanism and 
 has 
 a much larger code and data size.
 
   Previous Release:
     Non-Debug Version:  79.0K Code, 17.2K Data,  96.2K Total
     Debug Version:     157.9K Code, 63.6K Data, 221.5K Total
   Current Release:
     Non-Debug Version:  79.3K Code, 17.2K Data,  96.5K Total
     Debug Version:     158.6K Code, 63.8K Data, 222.4K Total
 
 ----------------------------------------
 14 November 2007. Summary of changes for version 20071114:
 
 1) ACPI CA Core Subsystem:
 
 Implemented event counters for each of the Fixed Events, the ACPI SCI 
 (interrupt) itself, and control methods executed. Named 
 AcpiFixedEventCount[], AcpiSciCount, and AcpiMethodCount respectively. 
 These 
 should be useful for debugging and statistics.
 
 Implemented a new external interface, AcpiGetStatistics, to retrieve the 
 contents of the various event counters. Returns the current values for 
 AcpiSciCount, AcpiGpeCount, the AcpiFixedEventCount array, and 
 AcpiMethodCount. The interface can be expanded in the future if new 
 counters 
 are added. Device drivers should use this interface rather than access 
 the 
 counters directly.
 
 Fixed a problem with the FromBCD and ToBCD operators. With some 
 compilers, 
 the ShortDivide function worked incorrectly, causing problems with the 
 BCD 
 functions with large input values. A truncation from 64-bit to 32-bit 
 inadvertently occurred. Internal BZ 435. Lin Ming
 
 Fixed a problem with Index references passed as method arguments. 
 References 
 passed as arguments to control methods were dereferenced immediately 
 (before 
 control was passed to the called method). The references are now 
 correctly 
 passed directly to the called method. BZ 5389. Lin Ming
 
 Fixed a problem with CopyObject used in conjunction with the Index 
 operator. 
 The reference was incorrectly dereferenced before the copy. The reference 
 is 
 now correctly copied. BZ 5391. Lin Ming
 
 Fixed a problem with Control Method references within Package objects. 
 These 
 references are now correctly generated. This completes the package 
 construction overhaul that began in version 20071019.
 
 Example Code and Data Size: These are the sizes for the OS-independent 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
 debug version of the code includes the debug output trace mechanism and 
 has 
 a much larger code and data size.
 
   Previous Release:
     Non-Debug Version:  78.8K Code, 17.2K Data,  96.0K Total
     Debug Version:     157.2K Code, 63.4K Data, 220.6K Total
   Current Release:
     Non-Debug Version:  79.0K Code, 17.2K Data,  96.2K Total
     Debug Version:     157.9K Code, 63.6K Data, 221.5K Total
 
 
 2) iASL Compiler/Disassembler and Tools:
 
 The AcpiExec utility now installs handlers for all of the predefined 
 Operation Region types. New types supported are: PCI_Config, CMOS, and 
 PCIBARTarget.
 
 Fixed a problem with the 64-bit version of AcpiExec where the extended 
 (64-
 bit) address fields for the DSDT and FACS within the FADT were not being 
 used, causing truncation of the upper 32-bits of these addresses. Lin 
 Ming 
 and Bob Moore
 
 ----------------------------------------
 19 October 2007. Summary of changes for version 20071019:
 
 1) ACPI CA Core Subsystem:
 
 Fixed a problem with the Alias operator when the target of the alias is a 
 named ASL operator that opens a new scope -- Scope, Device, 
 PowerResource, 
 Processor, and ThermalZone. In these cases, any children of the original 
 operator could not be accessed via the alias, potentially causing 
 unexpected 
 AE_NOT_FOUND exceptions. (BZ 9067)
 
 Fixed a problem with the Package operator where all named references were 
 created as object references and left otherwise unresolved. According to 
 the 
 ACPI specification, a Package can only contain Data Objects or references 
 to 
 control methods. The implication is that named references to Data Objects 
 (Integer, Buffer, String, Package, BufferField, Field) should be resolved 
 immediately upon package creation. This is the approach taken with this 
 change. References to all other named objects (Methods, Devices, Scopes, 
 etc.) are all now properly created as reference objects. (BZ 5328)
 
 Reverted a change to Notify handling that was introduced in version 
 20070508. This version changed the Notify handling from asynchronous to 
 fully synchronous (Device driver Notify handling with respect to the 
 Notify 
 ASL operator). It was found that this change caused more problems than it 
 solved and was removed by most users.
 
 Fixed a problem with the Increment and Decrement operators where the type 
 of 
 the target object could be unexpectedly and incorrectly changed. (BZ 353) 
 Lin Ming.
 
 Fixed a problem with the Load and LoadTable operators where the table 
 location within the namespace was ignored. Instead, the table was always 
 loaded into the root or current scope. Lin Ming.
 
 Fixed a problem with the Load operator when loading a table from a buffer 
 object. The input buffer was prematurely zeroed and/or deleted. (BZ 577)
 
 Fixed a problem with the Debug object where a store of a DdbHandle 
 reference 
 object to the Debug object could cause a fault.
 
 Added a table checksum verification for the Load operator, in the case 
 where 
 the load is from a buffer. (BZ 578).
 
 Implemented additional parameter validation for the LoadTable operator. 
 The 
 length of the input strings SignatureString, OemIdString, and OemTableId 
 are 
 now checked for maximum lengths. (BZ 582) Lin Ming.
 
 Example Code and Data Size: These are the sizes for the OS-independent 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
 debug version of the code includes the debug output trace mechanism and 
 has 
 a much larger code and data size.
 
   Previous Release:
     Non-Debug Version:  78.5K Code, 17.1K Data,  95.6K Total
     Debug Version:     156.7K Code, 63.2K Data, 219.9K Total
   Current Release:
     Non-Debug Version:  78.8K Code, 17.2K Data,  96.0K Total
     Debug Version:     157.2K Code, 63.4K Data, 220.6K Total
 
 
 2) iASL Compiler/Disassembler:
 
 Fixed a problem where if a single file was specified and the file did not 
 exist, no error message was emitted. (Introduced with wildcard support in 
 version 20070917.)
 
 ----------------------------------------
 19 September 2007. Summary of changes for version 20070919:
 
 1) ACPI CA Core Subsystem:
 
 Designed and implemented new external interfaces to install and remove 
 handlers for ACPI table-related events. Current events that are defined 
 are 
 LOAD and UNLOAD. These interfaces allow the host to track ACPI tables as 
 they are dynamically loaded and unloaded. See AcpiInstallTableHandler and 
 AcpiRemoveTableHandler. (Lin Ming and Bob Moore)
 
 Fixed a problem where the use of the AcpiGbl_AllMethodsSerialized flag 
 (acpi_serialized option on Linux) could cause some systems to hang during 
 initialization. (Bob Moore) BZ 8171
 
 Fixed a problem where objects of certain types (Device, ThermalZone, 
 Processor, PowerResource) can be not found if they are declared and 
 referenced from within the same control method (Lin Ming) BZ 341
 
 Example Code and Data Size: These are the sizes for the OS-independent 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
 debug version of the code includes the debug output trace mechanism and 
 has 
 a much larger code and data size.
 
   Previous Release:
     Non-Debug Version:  78.3K Code, 17.0K Data,  95.3K Total
     Debug Version:     156.3K Code, 63.1K Data, 219.4K Total
   Current Release:
     Non-Debug Version:  78.5K Code, 17.1K Data,  95.6K Total
     Debug Version:     156.7K Code, 63.2K Data, 219.9K Total
 
 
 2) iASL Compiler/Disassembler:
 
 Implemented support to allow multiple files to be compiled/disassembled 
 in 
 a 
 single invocation. This includes command line wildcard support for both 
 the 
 Windows and Unix versions of the compiler. This feature simplifies the 
 disassembly and compilation of multiple ACPI tables in a single 
 directory.
 
 ----------------------------------------
 08 May 2007. Summary of changes for version 20070508:
 
 1) ACPI CA Core Subsystem:
 
 Implemented a Microsoft compatibility design change for the handling of 
 the 
 Notify AML operator. Previously, notify handlers were dispatched and 
 executed completely asynchronously in a deferred thread. The new design 
 still executes the notify handlers in a different thread, but the 
 original 
 thread that executed the Notify() now waits at a synchronization point 
 for 
 the notify handler to complete. Some machines depend on a synchronous 
 Notify 
 operator in order to operate correctly.
 
 Implemented support to allow Package objects to be passed as method 
 arguments to the external AcpiEvaluateObject interface. Previously, this 
 would return the AE_NOT_IMPLEMENTED exception. This feature had not been 
 implemented since there were no reserved control methods that required it 
 until recently.
 
 Fixed a problem with the internal FADT conversion where ACPI 1.0 FADTs 
 that 
 contained invalid non-zero values in reserved fields could cause later 
 failures because these fields have meaning in later revisions of the 
 FADT. 
 For incoming ACPI 1.0 FADTs, these fields are now always zeroed. (The 
 fields 
 are: Preferred_PM_Profile, PSTATE_CNT, CST_CNT, and IAPC_BOOT_FLAGS.)
 
 Fixed a problem where the Global Lock handle was not properly updated if 
 a 
 thread that acquired the Global Lock via executing AML code then 
 attempted 
 to acquire the lock via the AcpiAcquireGlobalLock interface. Reported by 
 Joe 
 Liu.
 
 Fixed a problem in AcpiEvDeleteGpeXrupt where the global interrupt list 
 could be corrupted if the interrupt being removed was at the head of the 
 list. Reported by Linn Crosetto.
 
 Example Code and Data Size: These are the sizes for the OS-independent 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
 debug version of the code includes the debug output trace mechanism and 
 has 
 a much larger code and data size.
 
   Previous Release:
     Non-Debug Version:  78.0K Code, 17.1K Data,  95.1K Total
     Debug Version:     155.9K Code, 63.1K Data, 219.0K Total
   Current Release:
     Non-Debug Version:  78.3K Code, 17.0K Data,  95.3K Total
     Debug Version:     156.3K Code, 63.1K Data, 219.4K Total
 
 ----------------------------------------
 20 March 2007. Summary of changes for version 20070320:
 
 1) ACPI CA Core Subsystem:
 
 Implemented a change to the order of interpretation and evaluation of AML 
 operand objects within the AML interpreter. The interpreter now evaluates 
 operands in the order that they appear in the AML stream (and the 
 corresponding ASL code), instead of in the reverse order (after the 
 entire 
 operand list has been parsed). The previous behavior caused several 
 subtle 
 incompatibilities with the Microsoft AML interpreter as well as being 
 somewhat non-intuitive. BZ 7871, local BZ 263. Valery Podrezov.
 
 Implemented a change to the ACPI Global Lock support. All interfaces to 
 the 
 global lock now allow the same thread to acquire the lock multiple times. 
 This affects the AcpiAcquireGlobalLock external interface to the global 
 lock 
 as well as the internal use of the global lock to support AML fields -- a 
 control method that is holding the global lock can now simultaneously 
 access 
 AML fields that require global lock protection. Previously, in both 
 cases, 
 this would have resulted in an AE_ALREADY_ACQUIRED exception. The change 
 to 
 AcpiAcquireGlobalLock is of special interest to drivers for the Embedded 
 Controller. There is no change to the behavior of the AML Acquire 
 operator, 
 as this can already be used to acquire a mutex multiple times by the same 
 thread. BZ 8066. With assistance from Alexey Starikovskiy.
 
 Fixed a problem where invalid objects could be referenced in the AML 
 Interpreter after error conditions. During operand evaluation, ensure 
 that 
 the internal "Return Object" field is cleared on error and only valid 
 pointers are stored there. Caused occasional access to deleted objects 
 that 
 resulted in "large reference count" warning messages. Valery Podrezov.
 
 Fixed a problem where an AE_STACK_OVERFLOW internal exception could occur 
 on 
 deeply nested control method invocations. BZ 7873, local BZ 487. Valery 
 Podrezov.
 
 Fixed an internal problem with the handling of result objects on the 
 interpreter result stack. BZ 7872. Valery Podrezov.
 
 Removed obsolete code that handled the case where AML_NAME_OP is the 
 target 
 of a reference (Reference.Opcode). This code was no longer necessary. BZ 
 7874. Valery Podrezov.
 
 Removed obsolete ACPI_NO_INTEGER64_SUPPORT from two header files. This 
 was 
 a 
 remnant from the previously discontinued 16-bit support.
 
 Example Code and Data Size: These are the sizes for the OS-independent 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
 debug version of the code includes the debug output trace mechanism and 
 has 
 a much larger code and data size.
 
   Previous Release:
     Non-Debug Version:  78.0K Code, 17.1K Data,  95.1K Total
     Debug Version:     155.8K Code, 63.3K Data, 219.1K Total
   Current Release:
     Non-Debug Version:  78.0K Code, 17.1K Data,  95.1K Total
     Debug Version:     155.9K Code, 63.1K Data, 219.0K Total
 
 ----------------------------------------
 26 January 2007. Summary of changes for version 20070126:
 
 1) ACPI CA Core Subsystem:
 
 Added the 2007 copyright to all module headers and signons. This affects 
 virtually every file in the ACPICA core subsystem, the iASL compiler, and 
 the utilities.
 
 Implemented a fix for an incorrect parameter passed to AcpiTbDeleteTable 
 during a table load. A bad pointer was passed in the case where the DSDT 
 is 
 overridden, causing a fault in this case.
 
 Example Code and Data Size: These are the sizes for the OS-independent 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
 debug version of the code includes the debug output trace mechanism and 
 has 
 a much larger code and data size.
 
   Previous Release:
     Non-Debug Version:  78.0K Code, 17.1K Data,  95.1K Total
     Debug Version:     155.8K Code, 63.3K Data, 219.1K Total
   Current Release:
     Non-Debug Version:  78.0K Code, 17.1K Data,  95.1K Total
     Debug Version:     155.8K Code, 63.3K Data, 219.1K Total
 
 ----------------------------------------
 15 December 2006. Summary of changes for version 20061215:
 
 1) ACPI CA Core Subsystem:
 
 Support for 16-bit ACPICA has been completely removed since it is no 
 longer 
 necessary and it clutters the code. All 16-bit macros, types, and 
 conditional compiles have been removed, cleaning up and simplifying the 
 code 
 across the entire subsystem. DOS support is no longer needed since the 
 bootable Linux firmware kit is now available.
 
 The handler for the Global Lock is now removed during AcpiTerminate to 
 enable a clean subsystem restart, via the implementation of the 
 AcpiEvRemoveGlobalLockHandler function. (With assistance from Joel Bretz, 
 HP)
 
 Implemented enhancements to the multithreading support within the 
 debugger 
 to enable improved multithreading debugging and evaluation of the 
 subsystem. 
 (Valery Podrezov)
 
 Debugger: Enhanced the Statistics/Memory command to emit the total 
 (maximum) 
 memory used during the execution, as well as the maximum memory consumed 
 by 
 each of the various object types. (Valery Podrezov)
 
 Example Code and Data Size: These are the sizes for the OS-independent 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
 debug version of the code includes the debug output trace mechanism and 
 has 
 a much larger code and data size.
 
   Previous Release:
     Non-Debug Version:  77.9K Code, 17.0K Data,  94.9K Total
     Debug Version:     155.2K Code, 63.1K Data, 218.3K Total
   Current Release:
     Non-Debug Version:  78.0K Code, 17.1K Data,  95.1K Total
     Debug Version:     155.8K Code, 63.3K Data, 219.1K Total
 
 
 2) iASL Compiler/Disassembler and Tools:
 
 AcpiExec: Implemented a new option (-m) to display full memory use 
 statistics upon subsystem/program termination. (Valery Podrezov)
 
 ----------------------------------------
 09 November 2006. Summary of changes for version 20061109:
 
 1) ACPI CA Core Subsystem:
 
 Optimized the Load ASL operator in the case where the source operand is 
 an 
 operation region. Simply map the operation region memory, instead of 
 performing a bytewise read. (Region must be of type SystemMemory, see 
 below.)
 
 Fixed the Load ASL operator for the case where the source operand is a 
 region field. A buffer object is also allowed as the source operand. BZ 
 480
 
 Fixed a problem where the Load ASL operator allowed the source operand to 
 be 
 an operation region of any type. It is now restricted to regions of type 
 SystemMemory, as per the ACPI specification. BZ 481
 
 Additional cleanup and optimizations for the new Table Manager code.
 
 AcpiEnable will now fail if all of the required ACPI tables are not 
 loaded 
 (FADT, FACS, DSDT). BZ 477
 
 Added #pragma pack(8/4) to acobject.h to ensure that the structures in 
 this 
 header are always compiled as aligned. The ACPI_OPERAND_OBJECT has been 
 manually optimized to be aligned and will not work if it is byte-packed. 
 
 Example Code and Data Size: These are the sizes for the OS-independent 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
 debug version of the code includes the debug output trace mechanism and 
 has 
 a much larger code and data size.
 
   Previous Release:
     Non-Debug Version:  78.1K Code, 17.1K Data,  95.2K Total
     Debug Version:     155.4K Code, 63.1K Data, 218.5K Total
   Current Release:
     Non-Debug Version:  77.9K Code, 17.0K Data,  94.9K Total
     Debug Version:     155.2K Code, 63.1K Data, 218.3K Total
 
 
 2) iASL Compiler/Disassembler and Tools:
 
 Fixed a problem where the presence of the _OSI predefined control method 
 within complex expressions could cause an internal compiler error.
 
 AcpiExec: Implemented full region support for multiple address spaces. 
 SpaceId is now part of the REGION object. BZ 429
 
 ----------------------------------------
 11 October 2006. Summary of changes for version 20061011:
 
 1) ACPI CA Core Subsystem:
 
 Completed an AML interpreter performance enhancement for control method 
 execution. Previously a 2-pass parse/execution, control methods are now 
 completely parsed and executed in a single pass. This improves overall 
 interpreter performance by ~25%, reduces code size, and reduces CPU stack 
 use. (Valery Podrezov + interpreter changes in version 20051202 that 
 eliminated namespace loading during the pass one parse.)
 
 Implemented _CID support for PCI Root Bridge detection. If the _HID does 
 not 
 match the predefined PCI Root Bridge IDs, the _CID list (if present) is 
 now 
 obtained and also checked for an ID match.
 
 Implemented additional support for the PCI _ADR execution: upsearch until 
 a 
 device scope is found before executing _ADR. This allows PCI_Config 
 operation regions to be declared locally within control methods 
 underneath 
 PCI device objects.
 
 Fixed a problem with a possible race condition between threads executing 
 AcpiWalkNamespace and the AML interpreter. This condition was removed by 
 modifying AcpiWalkNamespace to (by default) ignore all temporary 
 namespace 
 entries created during any concurrent control method execution. An 
 additional namespace race condition is known to exist between 
 AcpiWalkNamespace and the Load/Unload ASL operators and is still under 
 investigation.
 
 Restructured the AML ParseLoop function, breaking it into several 
 subfunctions in order to reduce CPU stack use and improve 
 maintainability. 
 (Mikhail Kouzmich)
 
 AcpiGetHandle: Fix for parameter validation to detect invalid 
 combinations 
 of prefix handle and pathname. BZ 478
 
 Example Code and Data Size: These are the sizes for the OS-independent 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
 debug version of the code includes the debug output trace mechanism and 
 has 
 a much larger code and data size.
 
   Previous Release:
     Non-Debug Version:  77.9K Code, 17.1K Data,  95.0K Total
     Debug Version:     154.6K Code, 63.0K Data, 217.6K Total
   Current Release:
     Non-Debug Version:  78.1K Code, 17.1K Data,  95.2K Total
     Debug Version:     155.4K Code, 63.1K Data, 218.5K Total
 
 2) iASL Compiler/Disassembler and Tools:
 
 Ported the -g option (get local ACPI tables) to the new ACPICA Table 
 Manager 
 to restore original behavior.
 
 ----------------------------------------
 27 September 2006. Summary of changes for version 20060927:
 
 1) ACPI CA Core Subsystem:
 
 Removed the "Flags" parameter from AcpiGetRegister and AcpiSetRegister. 
 These functions now use a spinlock for mutual exclusion and the interrupt 
 level indication flag is not needed.
 
 Fixed a problem with the Global Lock where the lock could appear to be 
 obtained before it is actually obtained. The global lock semaphore was 
 inadvertently created with one unit instead of zero units. (BZ 464) 
 Fiodor 
 Suietov.
 
 Fixed a possible memory leak and fault in AcpiExResolveObjectToValue 
 during 
 a read from a buffer or region field. (BZ 458) Fiodor Suietov.
 
 Example Code and Data Size: These are the sizes for the OS-independent 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
 debug version of the code includes the debug output trace mechanism and 
 has 
 a much larger code and data size.
 
   Previous Release:
     Non-Debug Version:  77.9K Code, 17.1K Data,  95.0K Total
     Debug Version:     154.7K Code, 63.0K Data, 217.7K Total
   Current Release:
     Non-Debug Version:  77.9K Code, 17.1K Data,  95.0K Total
     Debug Version:     154.6K Code, 63.0K Data, 217.6K Total
 
 
 2) iASL Compiler/Disassembler and Tools:
 
 Fixed a compilation problem with the pre-defined Resource Descriptor 
 field 
 names where an "object does not exist" error could be incorrectly 
 generated 
 if the parent ResourceTemplate pathname places the template within a 
 different namespace scope than the current scope. (BZ 7212)
 
 Fixed a problem where the compiler could hang after syntax errors 
 detected 
 in an ElseIf construct. (BZ 453)
 
 Fixed a problem with the AmlFilename parameter to the DefinitionBlock() 
 operator. An incorrect output filename was produced when this parameter 
 was 
 a null string (""). Now, the original input filename is used as the AML 
 output filename, with an ".aml" extension.
 
 Implemented a generic batch command mode for the AcpiExec utility 
 (execute 
 any AML debugger command) (Valery Podrezov).
 
 ----------------------------------------
 12 September 2006. Summary of changes for version 20060912:
 
 1) ACPI CA Core Subsystem:
 
 Enhanced the implementation of the "serialized mode" of the interpreter 
 (enabled via the AcpiGbl_AllMethodsSerialized flag.) When this mode is 
 specified, instead of creating a serialization semaphore per control 
 method, 
 the interpreter lock is simply no longer released before a blocking 
 operation during control method execution. This effectively makes the AML 
 Interpreter single-threaded. The overhead of a semaphore per-method is 
 eliminated.
 
 Fixed a regression where an error was no longer emitted if a control 
 method 
 attempts to create 2 objects of the same name. This once again returns 
 AE_ALREADY_EXISTS. When this exception occurs, it invokes the mechanism 
 that 
 will dynamically serialize the control method to possible prevent future 
 errors. (BZ 440)
 
 Integrated a fix for a problem with PCI Express HID detection in the PCI 
 Config Space setup procedure. (BZ 7145)
 
 Moved all FADT-related functions to a new file, tbfadt.c. Eliminated the 
 AcpiHwInitialize function - the FADT registers are now validated when the 
 table is loaded.
 
 Added two new warnings during FADT verification - 1) if the FADT is 
 larger 
 than the largest known FADT version, and 2) if there is a mismatch 
 between 
 a 
 32-bit block address and the 64-bit X counterpart (when both are non-
 zero.)
 
 Example Code and Data Size: These are the sizes for the OS-independent 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
 debug version of the code includes the debug output trace mechanism and 
 has 
 a much larger code and data size.
 
   Previous Release:
     Non-Debug Version:  77.9K Code, 16.7K Data,  94.6K Total
     Debug Version:     154.9K Code, 62.6K Data, 217.5K Total
   Current Release:
     Non-Debug Version:  77.9K Code, 17.1K Data,  95.0K Total
     Debug Version:     154.7K Code, 63.0K Data, 217.7K Total
 
 
 2) iASL Compiler/Disassembler and Tools:
 
 Fixed a problem with the implementation of the Switch() operator where 
 the 
 temporary variable was declared too close to the actual Switch, instead 
 of 
 at method level. This could cause a problem if the Switch() operator is 
 within a while loop, causing an error on the second iteration. (BZ 460)
 
 Disassembler - fix for error emitted for unknown type for target of scope 
 operator. Now, ignore it and continue.
 
 Disassembly of an FADT now verifies the input FADT and reports any errors 
 found. Fix for proper disassembly of full-sized (ACPI 2.0) FADTs.
 
 Disassembly of raw data buffers with byte initialization data now 
 prefixes 
 each output line with the current buffer offset.
 
 Disassembly of ASF! table now includes all variable-length data fields at 
 the end of some of the subtables.
 
 The disassembler now emits a comment if a buffer appears to be a 
 ResourceTemplate, but cannot be disassembled as such because the EndTag 
 does 
 not appear at the very end of the buffer.
 
 AcpiExec - Added the "-t" command line option to enable the serialized 
 mode 
 of the AML interpreter.
 
 ----------------------------------------
 31 August 2006. Summary of changes for version 20060831:
 
 1) ACPI CA Core Subsystem:
 
 Miscellaneous fixes for the Table Manager:
 - Correctly initialize internal common FADT for all 64-bit "X" fields
 - Fixed a couple table mapping issues during table load
 - Fixed a couple alignment issues for IA64
 - Initialize input array to zero in AcpiInitializeTables
 - Additional parameter validation for AcpiGetTable, AcpiGetTableHeader, 
 AcpiGetTableByIndex
 
 Change for GPE support: when a "wake" GPE is received, all wake GPEs are 
 now 
 immediately disabled to prevent the waking GPE from firing again and to 
 prevent other wake GPEs from interrupting the wake process.
 
 Added the AcpiGpeCount global that tracks the number of processed GPEs, 
 to 
 be used for debugging systems with a large number of ACPI interrupts.
 
 Implemented support for the "DMAR" ACPI table (DMA Redirection Table) in 
 both the ACPICA headers and the disassembler.
 
 Example Code and Data Size: These are the sizes for the OS-independent 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
 debug version of the code includes the debug output trace mechanism and 
 has 
 a much larger code and data size.
 
   Previous Release:
     Non-Debug Version:  77.8K Code, 16.5K Data,  94.3K Total
     Debug Version:     154.6K Code, 62.3K Data, 216.9K Total
   Current Release:
     Non-Debug Version:  77.9K Code, 16.7K Data,  94.6K Total
     Debug Version:     154.9K Code, 62.6K Data, 217.5K Total
 
 
 2) iASL Compiler/Disassembler and Tools:
 
 Disassembler support for the DMAR ACPI table.
 
 ----------------------------------------
 23 August 2006. Summary of changes for version 20060823:
 
 1) ACPI CA Core Subsystem:
 
 The Table Manager component has been completely redesigned and 
 reimplemented. The new design is much simpler, and reduces the overall 
 code 
 and data size of the kernel-resident ACPICA by approximately 5%. Also, it 
 is 
 now possible to obtain the ACPI tables very early during kernel 
 initialization, even before dynamic memory management is initialized. 
 (Alexey Starikovskiy, Fiodor Suietov, Bob Moore)
 
 Obsolete ACPICA interfaces:
 
 - AcpiGetFirmwareTable: Use AcpiGetTable instead (works at early kernel 
 init 
 time).
 - AcpiLoadTable: Not needed.
 - AcpiUnloadTable: Not needed.
 
 New ACPICA interfaces:
 
 - AcpiInitializeTables: Must be called before the table manager can be 
 used.
 - AcpiReallocateRootTable: Used to transfer the root table to dynamically 
 allocated memory after it becomes available.
 - AcpiGetTableByIndex: Allows the host to easily enumerate all ACPI 
 tables 
 in the RSDT/XSDT.
 
 Other ACPICA changes:
 
 - AcpiGetTableHeader returns the actual mapped table header, not a copy. 
 Use 
 AcpiOsUnmapMemory to free this mapping.
 - AcpiGetTable returns the actual mapped table. The mapping is managed 
 internally and must not be deleted by the caller. Use of this interface 
 causes no additional dynamic memory allocation.
 - AcpiFindRootPointer: Support for physical addressing has been 
 eliminated, 
 it appeared to be unused.
 - The interface to AcpiOsMapMemory has changed to be consistent with the 
 other allocation interfaces.
 - The interface to AcpiOsGetRootPointer has changed to eliminate 
 unnecessary 
 parameters.
 - ACPI_PHYSICAL_ADDRESS is now 32 bits on 32-bit platforms, 64 bits on 
 64-
 bit platforms. Was previously 64 bits on all platforms.
 - The interface to the ACPI Global Lock acquire/release macros have 
 changed 
 slightly since ACPICA no longer keeps a local copy of the FACS with a 
 constructed pointer to the actual global lock.
 
 Porting to the new table manager:
 
 - AcpiInitializeTables: Must be called once, and can be called anytime 
 during the OS initialization process. It allows the host to specify an 
 area 
 of memory to be used to store the internal version of the RSDT/XSDT (root 
 table). This allows the host to access ACPI tables before memory 
 management 
 is initialized and running.
 - AcpiReallocateRootTable: Can be called after memory management is 
 running 
 to copy the root table to a dynamically allocated array, freeing up the 
 scratch memory specified in the call to AcpiInitializeTables.
 - AcpiSubsystemInitialize: This existing interface is independent of the 
 Table Manager, and does not have to be called before the Table Manager 
 can 
 be used, it only must be called before the rest of ACPICA can be used.
 - ACPI Tables: Some changes have been made to the names and structure of 
 the 
 actbl.h and actbl1.h header files and may require changes to existing 
 code. 
 For example, bitfields have been completely removed because of their lack 
 of 
 portability across C compilers.
 - Update interfaces to the Global Lock acquire/release macros if local 
 versions are used. (see acwin.h)
 
 Obsolete files: tbconvrt.c, tbget.c, tbgetall.c, tbrsdt.c
 
 New files: tbfind.c
 
 Example Code and Data Size: These are the sizes for the OS-independent 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
 debug version of the code includes the debug output trace mechanism and 
 has 
 a much larger code and data size.
 
   Previous Release:
     Non-Debug Version:  80.7K Code, 17.9K Data,  98.6K Total
     Debug Version:     161.0K Code, 65.1K Data, 226.1K Total
   Current Release:
     Non-Debug Version:  77.8K Code, 16.5K Data,  94.3K Total
     Debug Version:     154.6K Code, 62.3K Data, 216.9K Total
 
 
 2) iASL Compiler/Disassembler and Tools:
 
 No changes for this release.
 
 ----------------------------------------
 21 July 2006. Summary of changes for version 20060721:
 
 1) ACPI CA Core Subsystem:
 
 The full source code for the ASL test suite used to validate the iASL 
 compiler and the ACPICA core subsystem is being released with the ACPICA 
 source for the first time. The source is contained in a separate package 
 and 
 consists of over 1100 files that exercise all ASL/AML operators. The 
 package 
 should appear on the Intel/ACPI web site shortly. (Valery Podrezov, 
 Fiodor 
 Suietov)
 
 Completed a new design and implementation for support of the ACPI Global 
 Lock. On the OS side, the global lock is now treated as a standard AML 
 mutex. Previously, multiple OS threads could "acquire" the global lock 
 simultaneously. However, this could cause the BIOS to be starved out of 
 the 
 lock - especially in cases such as the Embedded Controller driver where 
 there is a tight coupling between the OS and the BIOS.
 
 Implemented an optimization for the ACPI Global Lock interrupt mechanism. 
 The Global Lock interrupt handler no longer queues the execution of a 
 separate thread to signal the global lock semaphore. Instead, the 
 semaphore 
 is signaled directly from the interrupt handler.
 
 Implemented support within the AML interpreter for package objects that 
 contain a larger AML length (package list length) than the package 
 element 
 count. In this case, the length of the package is truncated to match the 
 package element count. Some BIOS code apparently modifies the package 
 length 
 on the fly, and this change supports this behavior. Provides 
 compatibility 
 with the MS AML interpreter. (With assistance from Fiodor Suietov)
 
 Implemented a temporary fix for the BankValue parameter of a Bank Field 
 to 
 support all constant values, now including the Zero and One opcodes. 
 Evaluation of this parameter must eventually be converted to a full 
 TermArg 
 evaluation. A not-implemented error is now returned (temporarily) for 
 non-
 constant values for this parameter.
 
 Fixed problem reports (Fiodor Suietov) integrated:
 - Fix for premature object deletion after CopyObject on Operation Region 
 (BZ 
 350)
 
 Example Code and Data Size: These are the sizes for the OS-independent 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
 debug version of the code includes the debug output trace mechanism and 
 has 
 a much larger code and data size.
 
   Previous Release:
     Non-Debug Version:  80.7K Code, 18.0K Data,  98.7K Total
     Debug Version:     160.9K Code, 65.1K Data, 226.0K Total
   Current Release:
     Non-Debug Version:  80.7K Code, 17.9K Data,  98.6K Total
     Debug Version:     161.0K Code, 65.1K Data, 226.1K Total
 
 
 2) iASL Compiler/Disassembler and Tools:
 
 No changes for this release.
 
 ----------------------------------------
 07 July 2006. Summary of changes for version 20060707:
 
 1) ACPI CA Core Subsystem:
 
 Added the ACPI_PACKED_POINTERS_NOT_SUPPORTED macro to support C compilers 
 that do not allow the initialization of address pointers within packed 
 structures - even though the hardware itself may support misaligned 
 transfers. Some of the debug data structures are packed by default to 
 minimize size.
 
 Added an error message for the case where AcpiOsGetThreadId() returns 
 zero. 
 A non-zero value is required by the core ACPICA code to ensure the proper 
 operation of AML mutexes and recursive control methods.
 
 The DSDT is now the only ACPI table that determines whether the AML 
 interpreter is in 32-bit or 64-bit mode. Not really a functional change, 
 but 
 the hooks for per-table 32/64 switching have been removed from the code. 
 A 
 clarification to the ACPI specification is forthcoming in ACPI 3.0B.
 
 Fixed a possible leak of an OwnerID in the error path of 
 AcpiTbInitTableDescriptor (tbinstal.c), and migrated all table OwnerID 
 deletion to a single place in AcpiTbUninstallTable to correct possible 
 leaks 
 when using the AcpiTbDeleteTablesByType interface (with assistance from 
 Lance Ortiz.)
 
 Fixed a problem with Serialized control methods where the semaphore 
 associated with the method could be over-signaled after multiple method 
 invocations.
 
 Fixed two issues with the locking of the internal namespace data 
 structure. 
 Both the Unload() operator and AcpiUnloadTable interface now lock the 
 namespace during the namespace deletion associated with the table unload 
 (with assistance from Linn Crosetto.)
 
 Fixed problem reports (Valery Podrezov) integrated:
 - Eliminate unnecessary memory allocation for CreateXxxxField (BZ 5426)
 
 Fixed problem reports (Fiodor Suietov) integrated:
 - Incomplete cleanup branches in AcpiTbGetTableRsdt (BZ 369)
 - On Address Space handler deletion, needless deactivation call (BZ 374)
 - AcpiRemoveAddressSpaceHandler: validate Device handle parameter (BZ 
 375)
 - Possible memory leak, Notify sub-objects of Processor, Power, 
 ThermalZone 
 (BZ 376)
 - AcpiRemoveAddressSpaceHandler: validate Handler parameter (BZ 378)
 - Minimum Length of RSDT should be validated (BZ 379)
 - AcpiRemoveNotifyHandler: return AE_NOT_EXIST if Processor Obj has no 
 Handler (BZ (380)
 - AcpiUnloadTable: return AE_NOT_EXIST if no table of specified type 
 loaded 
 (BZ 381)
 
 Example Code and Data Size: These are the sizes for the OS-independent 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
 debug version of the code includes the debug output trace mechanism and 
 has 
 a much larger code and data size.
 
   Previous Release:
     Non-Debug Version:  80.5K Code, 17.8K Data,  98.3K Total
     Debug Version:     160.8K Code, 64.8K Data, 225.6K Total
   Current Release:
     Non-Debug Version:  80.7K Code, 17.9K Data,  98.6K Total
     Debug Version:     161.0K Code, 65.1K Data, 226.1K Total
 
 
 2) iASL Compiler/Disassembler and Tools:
 
 Fixed problem reports:
 Compiler segfault when ASL contains a long (>1024) String declaration (BZ 
 436)
 
 ----------------------------------------
 23 June 2006. Summary of changes for version 20060623:
 
 1) ACPI CA Core Subsystem:
 
 Implemented a new ACPI_SPINLOCK type for the OSL lock interfaces. This 
 allows the type to be customized to the host OS for improved efficiency 
 (since a spinlock is usually a very small object.)
 
 Implemented support for "ignored" bits in the ACPI registers. According 
 to 
 the ACPI specification, these bits should be preserved when writing the 
 registers via a read/modify/write cycle. There are 3 bits preserved in 
 this 
 manner: PM1_CONTROL[0] (SCI_EN), PM1_CONTROL[9], and PM1_STATUS[11].
 
 Implemented the initial deployment of new OSL mutex interfaces. Since 
 some 
 host operating systems have separate mutex and semaphore objects, this 
 feature was requested. The base code now uses mutexes (and the new mutex 
 interfaces) wherever a binary semaphore was used previously. However, for 
 the current release, the mutex interfaces are defined as macros to map 
 them 
 to the existing semaphore interfaces. Therefore, no OSL changes are 
 required 
 at this time. (See acpiosxf.h)
 
 Fixed several problems with the support for the control method SyncLevel 
 parameter. The SyncLevel now works according to the ACPI specification 
 and 
 in concert with the Mutex SyncLevel parameter, since the current 
 SyncLevel 
 is a property of the executing thread. Mutual exclusion for control 
 methods 
 is now implemented with a mutex instead of a semaphore.
 
 Fixed three instances of the use of the C shift operator in the bitfield 
 support code (exfldio.c) to avoid the use of a shift value larger than 
 the 
 target data width. The behavior of C compilers is undefined in this case 
 and 
 can cause unpredictable results, and therefore the case must be detected 
 and 
 avoided. (Fiodor Suietov)
 
 Added an info message whenever an SSDT or OEM table is loaded dynamically 
 via the Load() or LoadTable() ASL operators. This should improve 
 debugging 
 capability since it will show exactly what tables have been loaded 
 (beyond 
 the tables present in the RSDT/XSDT.)
 
 Example Code and Data Size: These are the sizes for the OS-independent 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
 debug version of the code includes the debug output trace mechanism and 
 has 
 a much larger code and data size.
 
   Previous Release:
     Non-Debug Version:  80.0K Code, 17.6K Data,  97.6K Total
     Debug Version:     160.2K Code, 64.7K Data, 224.9K Total
   Current Release:
     Non-Debug Version:  80.5K Code, 17.8K Data,  98.3K Total
     Debug Version:     160.8K Code, 64.8K Data, 225.6K Total
 
 
 2) iASL Compiler/Disassembler and Tools:
 
 No changes for this release.
 
 ----------------------------------------
 08 June 2006. Summary of changes for version 20060608:
 
 1) ACPI CA Core Subsystem:
 
 Converted the locking mutex used for the ACPI hardware to a spinlock. 
 This 
 change should eliminate all problems caused by attempting to acquire a 
 semaphore at interrupt level, and it means that all ACPICA external 
 interfaces that directly access the ACPI hardware can be safely called 
 from 
 interrupt level. OSL code that implements the semaphore interfaces should 
 be 
 able to eliminate any workarounds for being called at interrupt level.
 
 Fixed a regression introduced in 20060526 where the ACPI device 
 initialization could be prematurely aborted with an AE_NOT_FOUND if a 
 device 
 did not have an optional _INI method.
 
 Fixed an IndexField issue where a write to the Data Register should be 
 limited in size to the AccessSize (width) of the IndexField itself. (BZ 
 433, 
 Fiodor Suietov)
 
 Fixed problem reports (Valery Podrezov) integrated:
 - Allow store of ThermalZone objects to Debug object (BZ 5369/5370)
 
 Fixed problem reports (Fiodor Suietov) integrated:
 - AcpiGetTableHeader doesn't handle multiple instances correctly (BZ 364)
 
 Removed four global mutexes that were obsolete and were no longer being 
 used.
 
 Example Code and Data Size: These are the sizes for the OS-independent 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
 debug version of the code includes the debug output trace mechanism and 
 has 
 a much larger code and data size.
 
   Previous Release:
     Non-Debug Version:  80.0K Code, 17.7K Data,  97.7K Total
     Debug Version:     160.3K Code, 64.9K Data, 225.2K Total
   Current Release:
     Non-Debug Version:  80.0K Code, 17.6K Data,  97.6K Total
     Debug Version:     160.2K Code, 64.7K Data, 224.9K Total
 
 
 2) iASL Compiler/Disassembler and Tools:
 
 Fixed a fault when using -g option (get tables from registry) on Windows 
 machines.
 
 Fixed problem reports integrated:
 - Generate error if CreateField NumBits parameter is zero. (BZ 405)
 - Fault if Offset/Length in Field unit is very large (BZ 432, Fiodor 
 Suietov)
 - Global table revision override (-r) is ignored (BZ 413)
 
 ----------------------------------------
 26 May 2006. Summary of changes for version 20060526:
 
 1) ACPI CA Core Subsystem:
 
 Restructured, flattened, and simplified the internal interfaces for 
 namespace object evaluation - resulting in smaller code, less CPU stack 
 use, 
 and fewer interfaces. (With assistance from Mikhail Kouzmich)
 
 Fixed a problem with the CopyObject operator where the first parameter 
 was 
 not typed correctly for the parser, interpreter, compiler, and 
 disassembler. 
 Caused various errors and unexpected behavior.
 
 Fixed a problem where a ShiftLeft or ShiftRight of more than 64 bits 
 produced incorrect results with some C compilers. Since the behavior of C 
 compilers when the shift value is larger than the datatype width is 
 apparently not well defined, the interpreter now detects this condition 
 and 
 simply returns zero as expected in all such cases. (BZ 395)
 
 Fixed problem reports (Valery Podrezov) integrated:
 - Update String-to-Integer conversion to match ACPI 3.0A spec (BZ 5329)
 - Allow interpreter to handle nested method declarations (BZ 5361)
 
 Fixed problem reports (Fiodor Suietov) integrated:
 - AcpiTerminate doesn't free debug memory allocation list objects (BZ 
 355)
 - After Core Subsystem shutdown, AcpiSubsystemStatus returns AE_OK (BZ 
 356)
 - AcpiOsUnmapMemory for RSDP can be invoked inconsistently (BZ 357)
 - Resource Manager should return AE_TYPE for non-device objects (BZ 358)
 - Incomplete cleanup branch in AcpiNsEvaluateRelative (BZ 359)
 - Use AcpiOsFree instead of ACPI_FREE in AcpiRsSetSrsMethodData (BZ 360)
 - Incomplete cleanup branch in AcpiPsParseAml (BZ 361)
 - Incomplete cleanup branch in AcpiDsDeleteWalkState (BZ 362)
 - AcpiGetTableHeader returns AE_NO_ACPI_TABLES until DSDT is loaded (BZ 
 365)
 - Status of the Global Initialization Handler call not used (BZ 366)
 - Incorrect object parameter to Global Initialization Handler (BZ 367)
 
 Example Code and Data Size: These are the sizes for the OS-independent 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
 debug version of the code includes the debug output trace mechanism and 
 has 
 a much larger code and data size.
 
   Previous Release:
     Non-Debug Version:  79.8K Code, 17.7K Data,  97.5K Total
     Debug Version:     160.5K Code, 65.1K Data, 225.6K Total
   Current Release:
     Non-Debug Version:  80.0K Code, 17.7K Data,  97.7K Total
     Debug Version:     160.3K Code, 64.9K Data, 225.2K Total
 
 
 2) iASL Compiler/Disassembler and Tools:
 
 Modified the parser to allow the names IO, DMA, and IRQ to be used as 
 namespace identifiers with no collision with existing resource descriptor 
 macro names. This provides compatibility with other ASL compilers and is 
 most useful for disassembly/recompilation of existing tables without 
 parse 
 errors. (With assistance from Thomas Renninger)
 
 Disassembler: fixed an incorrect disassembly problem with the 
 DataTableRegion and CopyObject operators. Fixed a possible fault during 
 disassembly of some Alias operators.
 
 ----------------------------------------
 12 May 2006. Summary of changes for version 20060512:
 
 1) ACPI CA Core Subsystem:
 
 Replaced the AcpiOsQueueForExecution interface with a new interface named 
 AcpiOsExecute. The major difference is that the new interface does not 
 have 
 a Priority parameter, this appeared to be useless and has been replaced 
 by 
 a 
 Type parameter. The Type tells the host what type of execution is being 
 requested, such as global lock handler, notify handler, GPE handler, etc. 
 This allows the host to queue and execute the request as appropriate for 
 the 
 request type, possibly using different work queues and different 
 priorities 
 for the various request types. This enables fixes for multithreading 
 deadlock problems such as BZ #5534, and will require changes to all 
 existing 
 OS interface layers. (Alexey Starikovskiy and Bob Moore)
 
 Fixed a possible memory leak associated with the support for the so-
 called 
 "implicit return" ACPI extension. Reported by FreeBSD, BZ #6514. (Fiodor 
 Suietov)
 
 Fixed a problem with the Load() operator where a table load from an 
 operation region could overwrite an internal table buffer by up to 7 
 bytes 
 and cause alignment faults on IPF systems. (With assistance from Luming 
 Yu)
 
 Example Code and Data Size: These are the sizes for the OS-independent 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
 debug version of the code includes the debug output trace mechanism and 
 has 
 a much larger code and data size.
 
   Previous Release:
     Non-Debug Version:  79.7K Code, 17.7K Data,  97.4K Total
     Debug Version:     160.1K Code, 65.2K Data, 225.3K Total
   Current Release:
     Non-Debug Version:  79.8K Code, 17.7K Data,  97.5K Total
     Debug Version:     160.5K Code, 65.1K Data, 225.6K Total
 
 
 
 2) iASL Compiler/Disassembler and Tools:
 
 Disassembler: Implemented support to cross reference the internal 
 namespace 
 and automatically generate ASL External() statements for symbols not 
 defined 
 within the current table being disassembled. This will simplify the 
 disassembly and recompilation of interdependent tables such as SSDTs 
 since 
 these statements will no longer have to be added manually.
 
 Disassembler: Implemented experimental support to automatically detect 
 invocations of external control methods and generate appropriate 
 External() 
 statements. This is problematic because the AML cannot be correctly 
 parsed 
 until the number of arguments for each control method is known. 
 Currently, 
 standalone method invocations and invocations as the source operand of a 
 Store() statement are supported.
 
 Disassembler: Implemented support for the ASL pseudo-operators LNotEqual, 
 LLessEqual, and LGreaterEqual. Previously disassembled as LNot(LEqual()), 
 LNot(LGreater()), and LNot(LLess()), this makes the disassembled ASL code 
 more readable and likely closer to the original ASL source.
 
 ----------------------------------------
 21 April 2006. Summary of changes for version 20060421:
 
 1) ACPI CA Core Subsystem:
 
 Removed a device initialization optimization introduced in 20051216 where 
 the _STA method was not run unless an _INI was also present for the same 
 device. This optimization could cause problems because it could allow 
 _INI 
 methods to be run within a not-present device subtree. (If a not-present 
 device had no _INI, _STA would not be run, the not-present status would 
 not 
 be discovered, and the children of the device would be incorrectly 
 traversed.)
 
 Implemented a new _STA optimization where namespace subtrees that do not 
 contain _INI are identified and ignored during device initialization. 
 Selectively running _STA can significantly improve boot time on large 
 machines (with assistance from Len Brown.)
 
 Implemented support for the device initialization case where the returned 
 _STA flags indicate a device not-present but functioning. In this case, 
 _INI 
 is not run, but the device children are examined for presence, as per the 
 ACPI specification.
 
 Implemented an additional change to the IndexField support in order to 
 conform to MS behavior. The value written to the Index Register is not 
 simply a byte offset, it is a byte offset in units of the access width of 
 the parent Index Field. (Fiodor Suietov)
 
 Defined and deployed a new OSL interface, AcpiOsValidateAddress. This 
 interface is called during the creation of all AML operation regions, and 
 allows the host OS to exert control over what addresses it will allow the 
 AML code to access. Operation Regions whose addresses are disallowed will 
 cause a runtime exception when they are actually accessed (will not 
 affect 
 or abort table loading.) See oswinxf or osunixxf for an example 
 implementation.
 
 Defined and deployed a new OSL interface, AcpiOsValidateInterface. This 
 interface allows the host OS to match the various "optional" 
 interface/behavior strings for the _OSI predefined control method as 
 appropriate (with assistance from Bjorn Helgaas.) See oswinxf or osunixxf 
 for an example implementation.
 
 Restructured and corrected various problems in the exception handling 
 code 
 paths within DsCallControlMethod and DsTerminateControlMethod in dsmethod 
 (with assistance from Takayoshi Kochi.)
 
 Modified the Linux source converter to ignore quoted string literals 
 while 
 converting identifiers from mixed to lower case. This will correct 
 problems 
 with the disassembler and other areas where such strings must not be 
 modified.
 
 The ACPI_FUNCTION_* macros no longer require quotes around the function 
 name. This allows the Linux source converter to convert the names, now 
 that 
 the converter ignores quoted strings.
 
 Example Code and Data Size: These are the sizes for the OS-independent 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
 debug version of the code includes the debug output trace mechanism and 
 has 
 a much larger code and data size.
 
   Previous Release:
 
     Non-Debug Version:  81.1K Code, 17.7K Data,  98.8K Total
     Debug Version:     158.9K Code, 64.9K Data, 223.8K Total
   Current Release:
     Non-Debug Version:  79.7K Code, 17.7K Data,  97.4K Total
     Debug Version:     160.1K Code, 65.2K Data, 225.3K Total
 
 
 2) iASL Compiler/Disassembler and Tools:
 
 Implemented 3 new warnings for iASL, and implemented multiple warning 
 levels 
 (w2 flag).
 
 1) Ignored timeouts: If the TimeoutValue parameter to Wait or Acquire is 
 not 
 WAIT_FOREVER (0xFFFF) and the code does not examine the return value to 
 check for the possible timeout, a warning is issued.
 
 2) Useless operators: If an ASL operator does not specify an optional 
 target 
 operand and it also does not use the function return value from the 
 operator, a warning is issued since the operator effectively does 
 nothing.
 
 3) Unreferenced objects: If a namespace object is created, but never 
 referenced, a warning is issued. This is a warning level 2 since there 
 are 
 cases where this is ok, such as when a secondary table is loaded that 
 uses 
 the unreferenced objects. Even so, care is taken to only flag objects 
 that 
 don't look like they will ever be used. For example, the reserved methods 
 (starting with an underscore) are usually not referenced because it is 
 expected that the OS will invoke them.
 
 ----------------------------------------
 31 March 2006. Summary of changes for version 20060331:
 
 1) ACPI CA Core Subsystem:
 
 Implemented header file support for the following additional ACPI tables: 
 ASF!, BOOT, CPEP, DBGP, MCFG, SPCR, SPMI, TCPA, and WDRT. With this 
 support, 
 all current and known ACPI tables are now defined in the ACPICA headers 
 and 
 are available for use by device drivers and other software.
 
 Implemented support to allow tables that contain ACPI names with invalid 
 characters to be loaded. Previously, this would cause the table load to 
 fail, but since there are several known cases of such tables on existing 
 machines, this change was made to enable ACPI support for them. Also, 
 this 
 matches the behavior of the Microsoft ACPI implementation.
 
 Fixed a couple regressions introduced during the memory optimization in 
 the 
 20060317 release. The namespace node definition required additional 
 reorganization and an internal datatype that had been changed to 8-bit 
 was 
 restored to 32-bit. (Valery Podrezov)
 
 Fixed a problem where a null pointer passed to AcpiUtDeleteGenericState 
 could be passed through to AcpiOsReleaseObject which is unexpected. Such 
 null pointers are now trapped and ignored, matching the behavior of the 
 previous implementation before the deployment of AcpiOsReleaseObject.
 (Valery Podrezov, Fiodor Suietov)
 
 Fixed a memory mapping leak during the deletion of a SystemMemory 
 operation 
 region where a cached memory mapping was not deleted. This became a 
 noticeable problem for operation regions that are defined within 
 frequently 
 used control methods. (Dana Meyers)
 
 Reorganized the ACPI table header files into two main files: one for the 
 ACPI tables consumed by the ACPICA core, and another for the 
 miscellaneous 
 ACPI tables that are consumed by the drivers and other software. The 
 various 
 FADT definitions were merged into one common section and three different 
 tables (ACPI 1.0, 1.0+, and 2.0)
 
 Example Code and Data Size: These are the sizes for the OS-independent 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The 
 debug version of the code includes the debug output trace mechanism and 
 has 
 a much larger code and data size.
 
   Previous Release:
     Non-Debug Version:  80.9K Code, 17.7K Data,  98.6K Total
     Debug Version:     158.7K Code, 64.8K Data, 223.5K Total
   Current Release:
     Non-Debug Version:  81.1K Code, 17.7K Data,  98.8K Total
     Debug Version:     158.9K Code, 64.9K Data, 223.8K Total
 
 
 2) iASL Compiler/Disassembler and Tools:
 
 Disassembler: Implemented support to decode and format all non-AML ACPI 
 tables (tables other than DSDTs and SSDTs.) This includes the new tables 
 added to the ACPICA headers, therefore all current and known ACPI tables 
 are 
 supported.
 
 Disassembler: The change to allow ACPI names with invalid characters also 
 enables the disassembly of such tables. Invalid characters within names 
 are 
 changed to '*' to make the name printable; the iASL compiler will still 
 generate an error for such names, however, since this is an invalid ACPI 
 character.
 
 Implemented an option for AcpiXtract (-a) to extract all tables found in 
 the 
 input file. The default invocation extracts only the DSDTs and SSDTs.
 
 Fixed a couple of gcc generation issues for iASL and AcpiExec and added a 
 makefile for the AcpiXtract utility.
 
 ----------------------------------------
 17 March 2006. Summary of changes for version 20060317:
 
 1) ACPI CA Core Subsystem:
 
 Implemented the use of a cache object for all internal namespace nodes. 
 Since there are about 1000 static nodes in a typical system, this will 
 decrease memory use for cache implementations that minimize per-
 allocation 
 overhead (such as a slab allocator.)
 
 Removed the reference count mechanism for internal namespace nodes, since 
 it 
 was deemed unnecessary. This reduces the size of each namespace node by 
 about 5%-10% on all platforms. Nodes are now 20 bytes for the 32-bit 
 case, 
 and 32 bytes for the 64-bit case.
 
 Optimized several internal data structures to reduce object size on 64-
 bit 
 platforms by packing data within the 64-bit alignment. This includes the 
 frequently used ACPI_OPERAND_OBJECT, of which there can be ~1000 static 
 instances corresponding to the namespace objects.
 
 Added two new strings for the predefined _OSI method: "Windows 2001.1 
 SP1" 
 and "Windows 2006".
 
 Split the allocation tracking mechanism out to a separate file, from 
 utalloc.c to uttrack.c. This mechanism appears to be only useful for 
 application-level code. Kernels may wish to not include uttrack.c in 
 distributions.
 
 Removed all remnants of the obsolete ACPI_REPORT_* macros and the 
 associated 
 code. (These macros have been replaced by the ACPI_ERROR and ACPI_WARNING 
 macros.)
 
 Code and Data Size: These are the sizes for the acpica.lib produced by 
 the 
 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any 
 ACPI 
 driver or OSPM code. The debug version of the code includes the debug 
 output 
 trace mechanism and has a much larger code and data size. Note that these 
 values will vary depending on the efficiency of the compiler and the 
 compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  81.1K Code, 17.8K Data,  98.9K Total
     Debug Version:     161.6K Code, 65.7K Data, 227.3K Total
   Current Release:
     Non-Debug Version:  80.9K Code, 17.7K Data,  98.6K Total
     Debug Version:     158.7K Code, 64.8K Data, 223.5K Total
 
 
 2) iASL Compiler/Disassembler and Tools:
 
 Implemented an ANSI C version of the acpixtract utility. This version 
 will 
 automatically extract the DSDT and all SSDTs from the input acpidump text 
 file and dump the binary output to separate files. It can also display a 
 summary of the input file including the headers for each table found and 
 will extract any single ACPI table, with any signature. (See 
 source/tools/acpixtract)
 
 ----------------------------------------
 10 March 2006. Summary of changes for version 20060310:
 
 1) ACPI CA Core Subsystem:
 
 Tagged all external interfaces to the subsystem with the new 
 ACPI_EXPORT_SYMBOL macro. This macro can be defined as necessary to 
 assist 
 kernel integration. For Linux, the macro resolves to the EXPORT_SYMBOL 
 macro. The default definition is NULL.
 
 Added the ACPI_THREAD_ID type for the return value from 
 AcpiOsGetThreadId. 
 This allows the host to define this as necessary to simplify kernel 
 integration. The default definition is ACPI_NATIVE_UINT.
 
 Fixed two interpreter problems related to error processing, the deletion 
 of 
 objects, and placing invalid pointers onto the internal operator result 
 stack. BZ 6028, 6151 (Valery Podrezov)
 
 Increased the reference count threshold where a warning is emitted for 
 large 
 reference counts in order to eliminate unnecessary warnings on systems 
 with 
 large namespaces (especially 64-bit.) Increased the value from 0x400 to 
 0x800.
 
 Due to universal disagreement as to the meaning of the 'c' in the 
 calloc() 
 function, the ACPI_MEM_CALLOCATE macro has been renamed to 
 ACPI_ALLOCATE_ZEROED so that the purpose of the interface is 'clear'. 
 ACPI_MEM_ALLOCATE and ACPI_MEM_FREE are renamed to ACPI_ALLOCATE and 
 ACPI_FREE.
 
 Code and Data Size: These are the sizes for the acpica.lib produced by 
 the 
 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any 
 ACPI 
 driver or OSPM code. The debug version of the code includes the debug 
 output 
 trace mechanism and has a much larger code and data size. Note that these 
 values will vary depending on the efficiency of the compiler and the 
 compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  81.0K Code, 17.8K Data,  98.8K Total
     Debug Version:     161.4K Code, 65.7K Data, 227.1K Total
   Current Release:
     Non-Debug Version:  81.1K Code, 17.8K Data,  98.9K Total
     Debug Version:     161.6K Code, 65.7K Data, 227.3K Total
 
 
 2) iASL Compiler/Disassembler:
 
 Disassembler: implemented support for symbolic resource descriptor 
 references. If a CreateXxxxField operator references a fixed offset 
 within 
 a 
 resource descriptor, a name is assigned to the descriptor and the offset 
 is 
 translated to the appropriate resource tag and pathname. The addition of 
 this support brings the disassembled code very close to the original ASL 
 source code and helps eliminate run-time errors when the disassembled 
 code 
 is modified (and recompiled) in such a way as to invalidate the original 
 fixed offsets.
 
 Implemented support for a Descriptor Name as the last parameter to the 
 ASL 
 Register() macro. This parameter was inadvertently left out of the ACPI 
 specification, and will be added for ACPI 3.0b.
 
 Fixed a problem where the use of the "_OSI" string (versus the full path 
 "\_OSI") caused an internal compiler error. ("No back ptr to op")
 
 Fixed a problem with the error message that occurs when an invalid string 
 is 
 used for a _HID object (such as one with an embedded asterisk: 
 "*PNP010A".) 
 The correct message is now displayed.
 
 ----------------------------------------
 17 February 2006. Summary of changes for version 20060217:
 
 1) ACPI CA Core Subsystem:
 
 Implemented a change to the IndexField support to match the behavior of 
 the 
 Microsoft AML interpreter. The value written to the Index register is now 
 a 
 byte offset, no longer an index based upon the width of the Data 
 register. 
 This should fix IndexField problems seen on some machines where the Data 
 register is not exactly one byte wide. The ACPI specification will be 
 clarified on this point.
 
 Fixed a problem where several resource descriptor types could overrun the 
 internal descriptor buffer due to size miscalculation: VendorShort, 
 VendorLong, and Interrupt. This was noticed on IA64 machines, but could 
 affect all platforms.
 
 Fixed a problem where individual resource descriptors were misaligned 
 within 
 the internal buffer, causing alignment faults on IA64 platforms.
 
 Code and Data Size: These are the sizes for the acpica.lib produced by 
 the 
 Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any 
 ACPI 
 driver or OSPM code. The debug version of the code includes the debug 
 output 
 trace mechanism and has a much larger code and data size. Note that these 
 values will vary depending on the efficiency of the compiler and the 
 compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  81.1K Code, 17.8K Data,  98.9K Total
     Debug Version:     161.3K Code, 65.6K Data, 226.9K Total
   Current Release:
     Non-Debug Version:  81.0K Code, 17.8K Data,  98.8K Total
     Debug Version:     161.4K Code, 65.7K Data, 227.1K Total
 
 
 2) iASL Compiler/Disassembler:
 
 Implemented support for new reserved names: _WDG and _WED are Microsoft 
 extensions for Windows Instrumentation Management, _TDL is a new ACPI-
 defined method (Throttling Depth Limit.)
 
 Fixed a problem where a zero-length VendorShort or VendorLong resource 
 descriptor was incorrectly emitted as a descriptor of length one.
 
 ----------------------------------------
 10 February 2006. Summary of changes for version 20060210:
 
 1) ACPI CA Core Subsystem:
 
 Removed a couple of extraneous ACPI_ERROR messages that appeared during 
 normal execution. These became apparent after the conversion from 
 ACPI_DEBUG_PRINT.
 
 Fixed a problem where the CreateField operator could hang if the BitIndex 
 or 
 NumBits parameter referred to a named object. (Valery Podrezov, BZ 5359)
 
 Fixed a problem where a DeRefOf operation on a buffer object incorrectly 
 failed with an exception. This also fixes a couple of related RefOf and 
 DeRefOf issues. (Valery Podrezov, BZ 5360/5392/5387)
 
 Fixed a problem where the AE_BUFFER_LIMIT exception was returned instead 
 of 
 AE_STRING_LIMIT on an out-of-bounds Index() operation. (Valery Podrezov, 
 BZ 
 5480)
 
 Implemented a memory cleanup at the end of the execution of each 
 iteration 
 of an AML While() loop, preventing the accumulation of outstanding 
 objects. 
 (Valery Podrezov, BZ 5427)
 
 Eliminated a chunk of duplicate code in the object resolution code. 
 (Valery 
 Podrezov, BZ 5336)
 
 Fixed several warnings during the 64-bit code generation.
 
 The AcpiSrc source code conversion tool now inserts one line of 
 whitespace 
 after an if() statement that is followed immediately by a comment, 
 improving 
 readability of the Linux code.
 
 Code and Data Size: The current and previous library sizes for the core 
 subsystem are shown below. These are the code and data sizes for the 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. 
 These 
 values do not include any ACPI driver or OSPM code. The debug version of 
 the 
 code includes the debug output trace mechanism and has a much larger code 
 and data size. Note that these values will vary depending on the 
 efficiency 
 of the compiler and the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  81.0K Code, 17.9K Data,  98.9K Total
     Debug Version:     161.3K Code, 65.7K Data, 227.0K Total
   Current Release:
     Non-Debug Version:  81.1K Code, 17.8K Data,  98.9K Total
     Debug Version:     161.3K Code, 65.6K Data, 226.9K Total
 
 
 2) iASL Compiler/Disassembler:
 
 Fixed a problem with the disassembly of a BankField operator with a 
 complex 
 expression for the BankValue parameter.
 
 ----------------------------------------
 27 January 2006. Summary of changes for version 20060127:
 
 1) ACPI CA Core Subsystem:
 
 Implemented support in the Resource Manager to allow unresolved 
 namestring 
 references within resource package objects for the _PRT method. This 
 support 
 is in addition to the previously implemented unresolved reference support 
 within the AML parser. If the interpreter slack mode is enabled, these 
 unresolved references will be passed through to the caller as a NULL 
 package 
 entry.
 
 Implemented and deployed new macros and functions for error and warning 
 messages across the subsystem. These macros are simpler and generate less 
 code than their predecessors. The new macros ACPI_ERROR, ACPI_EXCEPTION, 
 ACPI_WARNING, and ACPI_INFO replace the ACPI_REPORT_* macros. The older 
 macros remain defined to allow ACPI drivers time to migrate to the new 
 macros.
 
 Implemented the ACPI_CPU_FLAGS type to simplify host OS integration of 
 the 
 Acquire/Release Lock OSL interfaces.
 
 Fixed a problem where Alias ASL operators are sometimes not correctly 
 resolved, in both the interpreter and the iASL compiler.
 
 Fixed several problems with the implementation of the 
 ConcatenateResTemplate 
 ASL operator. As per the ACPI specification, zero length buffers are now 
 treated as a single EndTag. One-length buffers always cause a fatal 
 exception. Non-zero length buffers that do not end with a full 2-byte 
 EndTag 
 cause a fatal exception.
 
 Fixed a possible structure overwrite in the AcpiGetObjectInfo external 
 interface. (With assistance from Thomas Renninger)
 
 Code and Data Size: The current and previous library sizes for the core 
 subsystem are shown below. These are the code and data sizes for the 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. 
 These 
 values do not include any ACPI driver or OSPM code. The debug version of 
 the 
 code includes the debug output trace mechanism and has a much larger code 
 and data size. Note that these values will vary depending on the 
 efficiency 
 of the compiler and the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  83.1K Code, 18.4K Data, 101.5K Total
     Debug Version:     163.2K Code, 66.2K Data, 229.4K Total
   Current Release:
     Non-Debug Version:  81.0K Code, 17.9K Data,  98.9K Total
     Debug Version:     161.3K Code, 65.7K Data, 227.0K Total
 
 
 2) iASL Compiler/Disassembler:
 
 Fixed an internal error that was generated for any forward references to 
 ASL 
 Alias objects.
 
 ----------------------------------------
 13 January 2006. Summary of changes for version 20060113:
 
 1) ACPI CA Core Subsystem:
 
 Added 2006 copyright to all module headers and signons. This affects 
 virtually every file in the ACPICA core subsystem, iASL compiler, and the 
 utilities.
  
 Enhanced the ACPICA error reporting in order to simplify user migration 
 to 
 the non-debug version of ACPICA. Replaced all instances of the 
 ACPI_DEBUG_PRINT macro invoked at the ACPI_DB_ERROR and ACPI_DB_WARN 
 debug 
 levels with the ACPI_REPORT_ERROR and ACPI_REPORT_WARNING macros, 
 respectively. This preserves all error and warning messages in the non-
 debug 
 version of the ACPICA code (this has been referred to as the "debug lite" 
 option.) Over 200 cases were converted to create a total of over 380 
 error/warning messages across the ACPICA code. This increases the code 
 and 
 data size of the default non-debug version of the code somewhat (about 
 13K), 
 but all error/warning reporting may be disabled if desired (and code 
 eliminated) by specifying the ACPI_NO_ERROR_MESSAGES compile-time 
 configuration option. The size of the debug version of ACPICA remains 
 about 
 the same.
 
 Fixed a memory leak within the AML Debugger "Set" command. One object was 
 not properly deleted for every successful invocation of the command.
 
 Code and Data Size: The current and previous library sizes for the core 
 subsystem are shown below. These are the code and data sizes for the 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. 
 These 
 values do not include any ACPI driver or OSPM code. The debug version of 
 the 
 code includes the debug output trace mechanism and has a much larger code 
 and data size. Note that these values will vary depending on the 
 efficiency 
 of the compiler and the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  76.6K Code, 12.3K Data,  88.9K Total
     Debug Version:     163.7K Code, 67.5K Data, 231.2K Total
   Current Release:
     Non-Debug Version:  83.1K Code, 18.4K Data, 101.5K Total
     Debug Version:     163.2K Code, 66.2K Data, 229.4K Total
 
 
 2) iASL Compiler/Disassembler:
 
 The compiler now officially supports the ACPI 3.0a specification that was 
 released on December 30, 2005. (Specification is available at 
 www.acpi.info)
 
 ----------------------------------------
 16 December 2005. Summary of changes for version 20051216:
 
 1) ACPI CA Core Subsystem:
 
 Implemented optional support to allow unresolved names within ASL Package 
 objects. A null object is inserted in the package when a named reference 
 cannot be located in the current namespace. Enabled via the interpreter 
 slack flag, this should eliminate AE_NOT_FOUND exceptions seen on 
 machines 
 that contain such code.
 
 Implemented an optimization to the initialization sequence that can 
 improve 
 boot time. During ACPI device initialization, the _STA method is now run 
 if 
 and only if the _INI method exists. The _STA method is used to determine 
 if 
 the device is present; An _INI can only be run if _STA returns present, 
 but 
 it is a waste of time to run the _STA method if the _INI does not exist. 
 (Prototype and assistance from Dong Wei)
 
 Implemented use of the C99 uintptr_t for the pointer casting macros if it 
 is 
 available in the current compiler. Otherwise, the default (void *) cast 
 is 
 used as before.
 
 Fixed some possible memory leaks found within the execution path of the 
 Break, Continue, If, and CreateField operators. (Valery Podrezov)
 
 Fixed a problem introduced in the 20051202 release where an exception is 
 generated during method execution if a control method attempts to declare 
 another method.
 
 Moved resource descriptor string constants that are used by both the AML 
 disassembler and AML debugger to the common utilities directory so that 
 these components are independent.
 
 Implemented support in the AcpiExec utility (-e switch) to globally 
 ignore 
 exceptions during control method execution (method is not aborted.)
 
 Added the rsinfo.c source file to the AcpiExec makefile for Linux/Unix 
 generation.
 
 Code and Data Size: The current and previous library sizes for the core 
 subsystem are shown below. These are the code and data sizes for the 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. 
 These 
 values do not include any ACPI driver or OSPM code. The debug version of 
 the 
 code includes the debug output trace mechanism and has a much larger code 
 and data size. Note that these values will vary depending on the 
 efficiency 
 of the compiler and the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  76.3K Code, 12.3K Data,  88.6K Total
     Debug Version:     163.2K Code, 67.4K Data, 230.6K Total
   Current Release:
     Non-Debug Version:  76.6K Code, 12.3K Data,  88.9K Total
     Debug Version:     163.7K Code, 67.5K Data, 231.2K Total
 
 
 2) iASL Compiler/Disassembler:
 
 Fixed a problem where a CPU stack overflow fault could occur if a 
 recursive 
 method call was made from within a Return statement.
 
 ----------------------------------------
 02 December 2005. Summary of changes for version 20051202:
 
 1) ACPI CA Core Subsystem:
 
 Modified the parsing of control methods to no longer create namespace 
 objects during the first pass of the parse. Objects are now created only 
 during the execute phase, at the moment the namespace creation operator 
 is 
 encountered in the AML (Name, OperationRegion, CreateByteField, etc.) 
 This 
 should eliminate ALREADY_EXISTS exceptions seen on some machines where 
 reentrant control methods are protected by an AML mutex. The mutex will 
 now 
 correctly block multiple threads from attempting to create the same 
 object 
 more than once.
 
 Increased the number of available Owner Ids for namespace object tracking 
 from 32 to 255. This should eliminate the OWNER_ID_LIMIT exceptions seen 
 on 
 some machines with a large number of ACPI tables (either static or 
 dynamic).
 
 Fixed a problem with the AcpiExec utility where a fault could occur when 
 the 
 -b switch (batch mode) is used.
 
 Enhanced the namespace dump routine to output the owner ID for each 
 namespace object.
 
 Code and Data Size: The current and previous library sizes for the core 
 subsystem are shown below. These are the code and data sizes for the 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. 
 These 
 values do not include any ACPI driver or OSPM code. The debug version of 
 the 
 code includes the debug output trace mechanism and has a much larger code 
 and data size. Note that these values will vary depending on the 
 efficiency 
 of the compiler and the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  76.3K Code, 12.3K Data,  88.6K Total
     Debug Version:     163.0K Code, 67.4K Data, 230.4K Total
   Current Release:
     Non-Debug Version:  76.3K Code, 12.3K Data,  88.6K Total
     Debug Version:     163.2K Code, 67.4K Data, 230.6K Total
 
 
 2) iASL Compiler/Disassembler:
 
 Fixed a parse error during compilation of certain Switch/Case constructs. 
 To 
 simplify the parse, the grammar now allows for multiple Default 
 statements 
 and this error is now detected and flagged during the analysis phase.
 
 Disassembler: The disassembly now includes the contents of the original 
 table header within a comment at the start of the file. This includes the 
 name and version of the original ASL compiler.
 
 ----------------------------------------
 17 November 2005. Summary of changes for version 20051117:
 
 1) ACPI CA Core Subsystem:
 
 Fixed a problem in the AML parser where the method thread count could be 
 decremented below zero if any errors occurred during the method parse 
 phase. 
 This should eliminate AE_AML_METHOD_LIMIT exceptions seen on some 
 machines. 
 This also fixed a related regression with the mechanism that detects and 
 corrects methods that cannot properly handle reentrancy (related to the 
 deployment of the new OwnerId mechanism.)
 
 Eliminated the pre-parsing of control methods (to detect errors) during 
 table load. Related to the problem above, this was causing unwind issues 
 if 
 any errors occurred during the parse, and it seemed to be overkill. A 
 table 
 load should not be aborted if there are problems with any single control 
 method, thus rendering this feature rather pointless.
 
 Fixed a problem with the new table-driven resource manager where an 
 internal 
 buffer overflow could occur for small resource templates.
 
 Implemented a new external interface, AcpiGetVendorResource. This 
 interface 
 will find and return a vendor-defined resource descriptor within a _CRS 
 or 
 _PRS method via an ACPI 3.0 UUID match. With assistance from Bjorn 
 Helgaas.
 
 Removed the length limit (200) on string objects as per the upcoming ACPI 
 3.0A specification. This affects the following areas of the interpreter: 
 1) 
 any implicit conversion of a Buffer to a String, 2) a String object
 result 
 of the ASL Concatenate operator, 3) the String object result of the ASL
 ToString operator.
 
 Fixed a problem in the Windows OS interface layer (OSL) where a 
 WAIT_FOREVER 
 on a semaphore object would incorrectly timeout. This allows the 
 multithreading features of the AcpiExec utility to work properly under 
 Windows.
 
 Updated the Linux makefiles for the iASL compiler and AcpiExec to include 
 the recently added file named "utresrc.c".
 
 Code and Data Size: The current and previous library sizes for the core 
 subsystem are shown below. These are the code and data sizes for the 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. 
 These 
 values do not include any ACPI driver or OSPM code. The debug version of 
 the 
 code includes the debug output trace mechanism and has a much larger code 
 and data size. Note that these values will vary depending on the 
 efficiency 
 of the compiler and the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  76.2K Code, 12.3K Data,  88.5K Total
     Debug Version:     163.0K Code, 67.4K Data, 230.4K Total
   Current Release:
     Non-Debug Version:  76.3K Code, 12.3K Data,  88.6K Total
     Debug Version:     163.0K Code, 67.4K Data, 230.4K Total
 
 
 2) iASL Compiler/Disassembler:
 
 Removed the limit (200) on string objects as per the upcoming ACPI 3.0A 
 specification. For the iASL compiler, this means that string literals 
 within 
 the source ASL can be of any length. 
 
 Enhanced the listing output to dump the AML code for resource descriptors 
 immediately after the ASL code for each descriptor, instead of in a block 
 at 
 the end of the entire resource template.
 
 Enhanced the compiler debug output to dump the entire original parse tree 
 constructed during the parse phase, before any transforms are applied to 
 the 
 tree. The transformed tree is dumped also.
 
 ----------------------------------------
 02 November 2005. Summary of changes for version 20051102:
 
 1) ACPI CA Core Subsystem:
 
 Modified the subsystem initialization sequence to improve GPE support. 
 The 
 GPE initialization has been split into two parts in order to defer 
 execution 
 of the _PRW methods (Power Resources for Wake) until after the hardware 
 is 
 fully initialized and the SCI handler is installed. This allows the _PRW 
 methods to access fields protected by the Global Lock. This will fix 
 systems 
 where a NO_GLOBAL_LOCK exception has been seen during initialization.
 
 Converted the ACPI internal object disassemble and display code within 
 the 
 AML debugger to fully table-driven operation, reducing code size and 
 increasing maintainability.
 
 Fixed a regression with the ConcatenateResTemplate() ASL operator 
 introduced 
 in the 20051021 release.
 
 Implemented support for "local" internal ACPI object types within the 
 debugger "Object" command and the AcpiWalkNamespace external interfaces. 
 These local types include RegionFields, BankFields, IndexFields, Alias, 
 and 
 reference objects.
 
 Moved common AML resource handling code into a new file, "utresrc.c". 
 This 
 code is shared by both the Resource Manager and the AML Debugger.
 
 Code and Data Size: The current and previous library sizes for the core 
 subsystem are shown below. These are the code and data sizes for the 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. 
 These 
 values do not include any ACPI driver or OSPM code. The debug version of 
 the 
 code includes the debug output trace mechanism and has a much larger code 
 and data size. Note that these values will vary depending on the 
 efficiency 
 of the compiler and the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  76.1K Code, 12.2K Data,  88.3K Total
     Debug Version:     163.5K Code, 67.0K Data, 230.5K Total
   Current Release:
     Non-Debug Version:  76.2K Code, 12.3K Data,  88.5K Total
     Debug Version:     163.0K Code, 67.4K Data, 230.4K Total
 
 
 2) iASL Compiler/Disassembler:
 
 Fixed a problem with very large initializer lists (more than 4000 
 elements) 
 for both Buffer and Package objects where the parse stack could overflow.
 
 Enhanced the pre-compile source code scan for non-ASCII characters to 
 ignore 
 characters within comment fields. The scan is now always performed and is 
 no 
 longer optional, detecting invalid characters within a source file 
 immediately rather than during the parse phase or later.
 
 Enhanced the ASL grammar definition to force early reductions on all 
 list-
 style grammar elements so that the overall parse stack usage is greatly 
 reduced. This should improve performance and reduce the possibility of 
 parse 
 stack overflow.
 
 Eliminated all reduce/reduce conflicts in the iASL parser generation. 
 Also, 
 with the addition of a %expected statement, the compiler generates from 
 source with no warnings.
 
 Fixed a possible segment fault in the disassembler if the input filename 
 does not contain a "dot" extension (Thomas Renninger).
 
 ----------------------------------------
 21 October 2005. Summary of changes for version 20051021:
 
 1) ACPI CA Core Subsystem:
 
 Implemented support for the EM64T and other x86-64 processors. This 
 essentially entails recognizing that these processors support non-aligned 
 memory transfers. Previously, all 64-bit processors were assumed to lack 
 hardware support for non-aligned transfers.
 
 Completed conversion of the Resource Manager to nearly full table-driven 
 operation. Specifically, the resource conversion code (convert AML to 
 internal format and the reverse) and the debug code to dump internal 
 resource descriptors are fully table-driven, reducing code and data size 
 and 
 improving maintainability.
 
 The OSL interfaces for Acquire and Release Lock now use a 64-bit flag 
 word 
 on 64-bit processors instead of a fixed 32-bit word. (With assistance 
 from 
 Alexey Starikovskiy)
 
 Implemented support within the resource conversion code for the Type-
 Specific byte within the various ACPI 3.0 *WordSpace macros.
 
 Fixed some issues within the resource conversion code for the type-
 specific 
 flags for both Memory and I/O address resource descriptors. For Memory, 
 implemented support for the MTP and TTP flags. For I/O, split the TRS and 
 TTP flags into two separate fields.
 
 Code and Data Size: The current and previous library sizes for the core 
 subsystem are shown below. These are the code and data sizes for the 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. 
 These 
 values do not include any ACPI driver or OSPM code. The debug version of 
 the 
 code includes the debug output trace mechanism and has a much larger code 
 and data size. Note that these values will vary depending on the 
 efficiency 
 of the compiler and the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  77.1K Code, 12.1K Data,  89.2K Total
     Debug Version:     168.0K Code, 68.3K Data, 236.3K Total
   Current Release:
     Non-Debug Version:  76.1K Code, 12.2K Data,  88.3K Total
     Debug Version:     163.5K Code, 67.0K Data, 230.5K Total
 
 
 
 2) iASL Compiler/Disassembler:
 
 Relaxed a compiler restriction that disallowed a ResourceIndex byte if 
 the 
 corresponding ResourceSource string was not also present in a resource 
 descriptor declaration. This restriction caused problems with existing 
 AML/ASL code that includes the Index byte without the string. When such 
 AML 
 was disassembled, it could not be compiled without modification. Further, 
 the modified code created a resource template with a different size than 
 the 
 original, breaking code that used fixed offsets into the resource 
 template 
 buffer.
 
 Removed a recent feature of the disassembler to ignore a lone 
 ResourceIndex 
 byte. This byte is now emitted if present so that the exact AML can be 
 reproduced when the disassembled code is recompiled.
 
 Improved comments and text alignment for the resource descriptor code 
 emitted by the disassembler.
 
 Implemented disassembler support for the ACPI 3.0 AccessSize field within 
 a 
 Register() resource descriptor.
 
 ----------------------------------------
 30 September 2005. Summary of changes for version 20050930:
 
 1) ACPI CA Core Subsystem:
 
 Completed a major overhaul of the Resource Manager code - specifically, 
 optimizations in the area of the AML/internal resource conversion code. 
 The 
 code has been optimized to simplify and eliminate duplicated code, CPU 
 stack 
 use has been decreased by optimizing function parameters and local 
 variables, and naming conventions across the manager have been 
 standardized 
 for clarity and ease of maintenance (this includes function, parameter, 
 variable, and struct/typedef names.) The update may force changes in some 
 driver code, depending on how resources are handled by the host OS.
 
 All Resource Manager dispatch and information tables have been moved to a 
 single location for clarity and ease of maintenance. One new file was 
 created, named "rsinfo.c".
 
 The ACPI return macros (return_ACPI_STATUS, etc.) have been modified to 
 guarantee that the argument is not evaluated twice, making them less 
 prone 
 to macro side-effects. However, since there exists the possibility of 
 additional stack use if a particular compiler cannot optimize them (such 
 as 
 in the debug generation case), the original macros are optionally 
 available.  
 Note that some invocations of the return_VALUE macro may now cause size 
 mismatch warnings; the return_UINT8 and return_UINT32 macros are provided 
 to 
 eliminate these. (From Randy Dunlap)
 
 Implemented a new mechanism to enable debug tracing for individual 
 control 
 methods. A new external interface, AcpiDebugTrace, is provided to enable 
 this mechanism. The intent is to allow the host OS to easily enable and 
 disable tracing for problematic control methods. This interface can be 
 easily exposed to a user or debugger interface if desired. See the file 
 psxface.c for details.
 
 AcpiUtCallocate will now return a valid pointer if a length of zero is 
 specified - a length of one is used and a warning is issued. This matches 
 the behavior of AcpiUtAllocate.
 
 Code and Data Size: The current and previous library sizes for the core 
 subsystem are shown below. These are the code and data sizes for the 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. 
 These 
 values do not include any ACPI driver or OSPM code. The debug version of 
 the 
 code includes the debug output trace mechanism and has a much larger code 
 and data size. Note that these values will vary depending on the 
 efficiency 
 of the compiler and the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  77.5K Code, 12.0K Data,  89.5K Total
     Debug Version:     168.1K Code, 68.4K Data, 236.5K Total
   Current Release:
     Non-Debug Version:  77.1K Code, 12.1K Data,  89.2K Total
     Debug Version:     168.0K Code, 68.3K Data, 236.3K Total
 
 
 2) iASL Compiler/Disassembler:
 
 A remark is issued if the effective compile-time length of a package or 
 buffer is zero. Previously, this was a warning.
 
 ----------------------------------------
 16 September 2005. Summary of changes for version 20050916:
 
 1) ACPI CA Core Subsystem:
 
 Fixed a problem within the Resource Manager where support for the Generic 
 Register descriptor was not fully implemented. This descriptor is now 
 fully 
 recognized, parsed, disassembled, and displayed.
 
 Completely restructured the Resource Manager code to utilize table-driven 
 dispatch and lookup, eliminating many of the large switch() statements. 
 This 
 reduces overall subsystem code size and code complexity. Affects the 
 resource parsing and construction, disassembly, and debug dump output.
 
 Cleaned up and restructured the debug dump output for all resource 
 descriptors. Improved readability of the output and reduced code size.
 
 Fixed a problem where changes to internal data structures caused the 
 optional ACPI_MUTEX_DEBUG code to fail compilation if specified.
 
 Code and Data Size: The current and previous library sizes for the core 
 subsystem are shown below. These are the code and data sizes for the 
 acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. 
 These 
 values do not include any ACPI driver or OSPM code. The debug version of 
 the 
 code includes the debug output trace mechanism and has a much larger code 
 and data size. Note that these values will vary depending on the 
 efficiency 
 of the compiler and the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  78.4K Code, 11.8K Data,  90.2K Total
     Debug Version:     169.6K Code, 69.9K Data, 239.5K Total
   Current Release:
     Non-Debug Version:  77.5K Code, 12.0K Data,  89.5K Total
     Debug Version:     168.1K Code, 68.4K Data, 236.5K Total
 
 
 2) iASL Compiler/Disassembler:
 
 Updated the disassembler to automatically insert an EndDependentFn() 
 macro 
 into the ASL stream if this macro is missing in the original AML code, 
 simplifying compilation of the resulting ASL module.
 
 Fixed a problem in the disassembler where a disassembled ResourceSource 
 string (within a large resource descriptor) was not surrounded by quotes 
 and 
 not followed by a comma, causing errors when the resulting ASL module was 
 compiled. Also, escape sequences within a ResourceSource string are now 
 handled correctly (especially "\\")
 
 ----------------------------------------
 02 September 2005. Summary of changes for version 20050902:
 
 1) ACPI CA Core Subsystem:
 
 Fixed a problem with the internal Owner ID allocation and deallocation 
 mechanisms for control method execution and recursive method invocation. 
 This should eliminate the OWNER_ID_LIMIT exceptions and "Invalid OwnerId" 
 messages seen on some systems. Recursive method invocation depth is 
 currently limited to 255. (Alexey Starikovskiy)
 
 Completely eliminated all vestiges of support for the "module-level 
 executable code" until this support is fully implemented and debugged. 
 This 
 should eliminate the NO_RETURN_VALUE exceptions seen during table load on 
 some systems that invoke this support.
 
 Fixed a problem within the resource manager code where the transaction 
 flags 
 for a 64-bit address descriptor were handled incorrectly in the type-
 specific flag byte.
 
 Consolidated duplicate code within the address descriptor resource 
 manager 
 code, reducing overall subsystem code size.
 
 Fixed a fault when using the AML debugger "disassemble" command to 
 disassemble individual control methods.
 
 Removed references to the "release_current" directory within the Unix 
 release package.
 
 Code and Data Size: The current and previous core subsystem library sizes 
 are shown below. These are the code and data sizes for the acpica.lib 
 produced by the Microsoft Visual C++ 6.0 compiler. These values do not 
 include any ACPI driver or OSPM code. The debug version of the code 
 includes 
 the debug output trace mechanism and has a much larger code and data 
 size. 
 Note that these values will vary depending on the efficiency of the 
 compiler 
 and the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  78.6K Code, 11.7K Data,  90.3K Total
     Debug Version:     170.0K Code, 69.9K Data, 239.9K Total
   Current Release:
     Non-Debug Version:  78.4K Code, 11.8K Data,  90.2K Total
     Debug Version:     169.6K Code, 69.9K Data, 239.5K Total
 
 
 2) iASL Compiler/Disassembler:
 
 Implemented an error check for illegal duplicate values in the interrupt 
 and 
 dma lists for the following ASL macros: Dma(), Irq(), IrqNoFlags(), and 
 Interrupt().
 
 Implemented error checking for the Irq() and IrqNoFlags() macros to 
 detect 
 too many values in the interrupt list (16 max) and invalid values in the 
 list (range 0 - 15)
 
 The maximum length string literal within an ASL file is now restricted to 
 200 characters as per the ACPI specification.
 
 Fixed a fault when using the -ln option (generate namespace listing).
 
 Implemented an error check to determine if a DescriptorName within a 
 resource descriptor has already been used within the current scope.
 
 ----------------------------------------
 15 August 2005.  Summary of changes for version 20050815:
  
 1) ACPI CA Core Subsystem:
  
 Implemented a full bytewise compare to determine if a table load request 
 is 
 attempting to load a duplicate table. The compare is performed if the 
 table 
 signatures and table lengths match. This will allow different tables with 
 the same OEM Table ID and revision to be loaded - probably against the 
 ACPI 
 specification, but discovered in the field nonetheless.
  
 Added the changes.txt logfile to each of the zipped release packages.
  
 Code and Data Size: Current and previous core subsystem library sizes are 
 shown below. These are the code and data sizes for the acpica.lib 
 produced 
 by the Microsoft Visual C++ 6.0 compiler, and these values do not include 
 any ACPI driver or OSPM code. The debug version of the code includes the 
 debug output trace mechanism and has a much larger code and data size. 
 Note 
 that these values will vary depending on the efficiency of the compiler 
 and 
 the compiler options used during generation.
  
   Previous Release:
     Non-Debug Version:  78.6K Code, 11.7K Data,  90.3K Total
     Debug Version:     167.0K Code, 69.9K Data, 236.9K Total
   Current Release:
     Non-Debug Version:  78.6K Code, 11.7K Data,  90.3K Total
     Debug Version:     170.0K Code, 69.9K Data, 239.9K Total
  
  
 2) iASL Compiler/Disassembler:
  
 Fixed a problem where incorrect AML code could be generated for Package 
 objects if optimization is disabled (via the -oa switch).
  
 Fixed a problem with where incorrect AML code is generated for variable-
 length packages when the package length is not specified and the number 
 of 
 initializer values is greater than 255.
  
 
 ----------------------------------------
 29 July 2005.  Summary of changes for version 20050729:
 
 1) ACPI CA Core Subsystem:
 
 Implemented support to ignore an attempt to install/load a particular 
 ACPI 
 table more than once. Apparently there exists BIOS code that repeatedly 
 attempts to load the same SSDT upon certain events. With assistance from 
 Venkatesh Pallipadi.
 
 Restructured the main interface to the AML parser in order to correctly 
 handle all exceptional conditions. This will prevent leakage of the 
 OwnerId 
 resource and should eliminate the AE_OWNER_ID_LIMIT exceptions seen on 
 some 
 machines. With assistance from Alexey Starikovskiy.
 
 Support for "module level code" has been disabled in this version due to 
 a 
 number of issues that have appeared on various machines. The support can 
 be 
 enabled by defining ACPI_ENABLE_MODULE_LEVEL_CODE during subsystem 
 compilation. When the issues are fully resolved, the code will be enabled 
 by 
 default again.
 
 Modified the internal functions for debug print support to define the 
 FunctionName parameter as a (const char *) for compatibility with 
 compiler 
 built-in macros such as __FUNCTION__, etc.
 
 Linted the entire ACPICA source tree for both 32-bit and 64-bit.
 
 Implemented support to display an object count summary for the AML 
 Debugger 
 commands Object and Methods.
 
 Code and Data Size: Current and previous core subsystem library sizes are 
 shown below. These are the code and data sizes for the acpica.lib 
 produced 
 by the Microsoft Visual C++ 6.0 compiler, and these values do not include 
 any ACPI driver or OSPM code. The debug version of the code includes the 
 debug output trace mechanism and has a much larger code and data size. 
 Note 
 that these values will vary depending on the efficiency of the compiler 
 and 
 the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  78.6K Code, 11.6K Data,  90.2K Total
     Debug Version:     170.0K Code, 69.7K Data, 239.7K Total
   Current Release:
     Non-Debug Version:  78.6K Code, 11.7K Data,  90.3K Total
     Debug Version:     167.0K Code, 69.9K Data, 236.9K Total
 
 
 2) iASL Compiler/Disassembler:
 
 Fixed a regression that appeared in the 20050708 version of the compiler 
 where an error message was inadvertently emitted for invocations of the 
 _OSI 
 reserved control method.
 
 ----------------------------------------
 08 July 2005.  Summary of changes for version 20050708:
 
 1) ACPI CA Core Subsystem:
 
 The use of the CPU stack in the debug version of the subsystem has been 
 considerably reduced. Previously, a debug structure was declared in every 
 function that used the debug macros. This structure has been removed in 
 favor of declaring the individual elements as parameters to the debug 
 functions. This reduces the cumulative stack use during nested execution 
 of 
 ACPI function calls at the cost of a small increase in the code size of 
 the 
 debug version of the subsystem. With assistance from Alexey Starikovskiy 
 and 
 Len Brown.
 
 Added the ACPI_GET_FUNCTION_NAME macro to enable the compiler-dependent 
 headers to define a macro that will return the current function name at 
 runtime (such as __FUNCTION__ or _func_, etc.) The function name is used 
 by 
 the debug trace output. If ACPI_GET_FUNCTION_NAME is not defined in the 
 compiler-dependent header, the function name is saved on the CPU stack 
 (one 
 pointer per function.) This mechanism is used because apparently there 
 exists no standard ANSI-C defined macro that that returns the function 
 name.
 
 Redesigned and reimplemented the "Owner ID" mechanism used to track 
 namespace objects created/deleted by ACPI tables and control method 
 execution. A bitmap is now used to allocate and free the IDs, thus 
 solving 
 the wraparound problem present in the previous implementation. The size 
 of 
 the namespace node descriptor was reduced by 2 bytes as a result (Alexey 
 Starikovskiy).
 
 Removed the UINT32_BIT and UINT16_BIT types that were used for the 
 bitfield 
 flag definitions within the headers for the predefined ACPI tables. These 
 have been replaced by UINT8_BIT in order to increase the code portability 
 of 
 the subsystem. If the use of UINT8 remains a problem, we may be forced to 
 eliminate bitfields entirely because of a lack of portability.
 
 Enhanced the performance of the AcpiUtUpdateObjectReference procedure. 
 This 
 is a frequently used function and this improvement increases the 
 performance 
 of the entire subsystem (Alexey Starikovskiy).
 
 Fixed several possible memory leaks and the inverse - premature object 
 deletion (Alexey Starikovskiy).
 
 Code and Data Size: Current and previous core subsystem library sizes are 
 shown below. These are the code and data sizes for the acpica.lib 
 produced 
 by the Microsoft Visual C++ 6.0 compiler, and these values do not include 
 any ACPI driver or OSPM code. The debug version of the code includes the 
 debug output trace mechanism and has a much larger code and data size. 
 Note 
 that these values will vary depending on the efficiency of the compiler 
 and 
 the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  78.6K Code, 11.5K Data,  90.1K Total
     Debug Version:     165.2K Code, 69.6K Data, 234.8K Total
   Current Release:
     Non-Debug Version:  78.6K Code, 11.6K Data,  90.2K Total
     Debug Version:     170.0K Code, 69.7K Data, 239.7K Total
 
 ----------------------------------------
 24 June 2005.  Summary of changes for version 20050624:
 
 1) ACPI CA Core Subsystem:
 
 Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for 
 the host-defined cache object. This allows the OSL implementation to 
 define 
 and type this object in any manner desired, simplifying the OSL 
 implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for 
 Linux, and should be defined in the OS-specific header file for other 
 operating systems as required.
 
 Changed the interface to AcpiOsAcquireObject to directly return the 
 requested object as the function return (instead of ACPI_STATUS.) This 
 change was made for performance reasons, since this is the purpose of the 
 interface in the first place. AcpiOsAcquireObject is now similar to the 
 AcpiOsAllocate interface.
 
 Implemented a new AML debugger command named Businfo. This command 
 displays 
 information about all devices that have an associate _PRT object. The 
 _ADR, 
 _HID, _UID, and _CID are displayed for these devices.
 
 Modified the initialization sequence in AcpiInitializeSubsystem to call 
 the 
 OSL interface AcpiOslInitialize first, before any local initialization. 
 This 
 change was required because the global initialization now calls OSL 
 interfaces.
 
 Enhanced the Dump command to display the entire contents of Package 
 objects 
 (including all sub-objects and their values.) 
 
 Restructured the code base to split some files because of size and/or 
 because the code logically belonged in a separate file. New files are 
 listed 
 below. All makefiles and project files included in the ACPI CA release 
 have 
 been updated.
     utilities/utcache.c           /* Local cache interfaces */
     utilities/utmutex.c           /* Local mutex support */
     utilities/utstate.c           /* State object support */
     interpreter/parser/psloop.c   /* Main AML parse loop */
 
 Code and Data Size: Current and previous core subsystem library sizes are 
 shown below. These are the code and data sizes for the acpica.lib 
 produced 
 by the Microsoft Visual C++ 6.0 compiler, and these values do not include 
 any ACPI driver or OSPM code. The debug version of the code includes the 
 debug output trace mechanism and has a much larger code and data size. 
 Note 
 that these values will vary depending on the efficiency of the compiler 
 and 
 the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  78.3K Code, 11.6K Data,  89.9K Total
     Debug Version:     164.0K Code, 69.1K Data, 233.1K Total
   Current Release:
     Non-Debug Version:  78.6K Code, 11.5K Data,  90.1K Total
     Debug Version:     165.2K Code, 69.6K Data, 234.8K Total
 
 
 2) iASL Compiler/Disassembler:
 
 Fixed a regression introduced in version 20050513 where the use of a 
 Package 
 object within a Case() statement caused a compile time exception. The 
 original behavior has been restored (a Match() operator is emitted.)
 
 ----------------------------------------
 17 June 2005.  Summary of changes for version 20050617:
 
 1) ACPI CA Core Subsystem:
 
 Moved the object cache operations into the OS interface layer (OSL) to 
 allow 
 the host OS to handle these operations if desired (for example, the Linux 
 OSL will invoke the slab allocator). This support is optional; the 
 compile 
 time define ACPI_USE_LOCAL_CACHE may be used to utilize the original 
 cache 
 code in the ACPI CA core. The new OSL interfaces are shown below. See 
 utalloc.c for an example implementation, and acpiosxf.h for the exact 
 interface definitions. With assistance from Alexey Starikovskiy.
     AcpiOsCreateCache
     AcpiOsDeleteCache
     AcpiOsPurgeCache
     AcpiOsAcquireObject
     AcpiOsReleaseObject
 
 Modified the interfaces to AcpiOsAcquireLock and AcpiOsReleaseLock to 
 return 
 and restore a flags parameter. This fits better with many OS lock models. 
 Note: the current execution state (interrupt handler or not) is no longer 
 passed to these interfaces. If necessary, the OSL must determine this 
 state 
 by itself, a simple and fast operation. With assistance from Alexey 
 Starikovskiy.
 
 Fixed a problem in the ACPI table handling where a valid XSDT was assumed 
 present if the revision of the RSDP was 2 or greater. According to the 
 ACPI 
 specification, the XSDT is optional in all cases, and the table manager 
 therefore now checks for both an RSDP >=2 and a valid XSDT pointer. 
 Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs 
 contain 
 only the RSDT.
 
 Fixed an interpreter problem with the Mid() operator in the case of an 
 input 
 string where the resulting output string is of zero length. It now 
 correctly 
 returns a valid, null terminated string object instead of a string object 
 with a null pointer.
 
 Fixed a problem with the control method argument handling to allow a 
 store 
 to an Arg object that already contains an object of type Device. The 
 Device 
 object is now correctly overwritten. Previously, an error was returned.
 
 
 Enhanced the debugger Find command to emit object values in addition to 
 the 
 found object pathnames. The output format is the same as the dump 
 namespace 
 command.
 
 Enhanced the debugger Set command. It now has the ability to set the 
 value 
 of any Named integer object in the namespace (Previously, only method 
 locals 
 and args could be set.)
 
 Code and Data Size: Current and previous core subsystem library sizes are 
 shown below. These are the code and data sizes for the acpica.lib 
 produced 
 by the Microsoft Visual C++ 6.0 compiler, and these values do not include 
 any ACPI driver or OSPM code. The debug version of the code includes the 
 debug output trace mechanism and has a much larger code and data size. 
 Note 
 that these values will vary depending on the efficiency of the compiler 
 and 
 the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  78.1K Code, 11.6K Data,  89.7K Total
     Debug Version:     164.0K Code, 69.3K Data, 233.3K Total
   Current Release:
     Non-Debug Version:  78.3K Code, 11.6K Data,  89.9K Total
     Debug Version:     164.0K Code, 69.1K Data, 233.1K Total
 
 
 2) iASL Compiler/Disassembler:
 
 Fixed a regression in the disassembler where if/else/while constructs 
 were 
 output incorrectly. This problem was introduced in the previous release 
 (20050526). This problem also affected the single-step disassembly in the 
 debugger.
 
 Fixed a problem where compiling the reserved _OSI method would randomly 
 (but 
 rarely) produce compile errors.
 
 Enhanced the disassembler to emit compilable code in the face of 
 incorrect 
 AML resource descriptors. If the optional ResourceSourceIndex is present, 
 but the ResourceSource is not, do not emit the ResourceSourceIndex in the 
 disassembly. Otherwise, the resulting code cannot be compiled without 
 errors.
 
 ----------------------------------------
 26 May 2005.  Summary of changes for version 20050526:
 
 1) ACPI CA Core Subsystem:
 
 Implemented support to execute Type 1 and Type 2 AML opcodes appearing at 
 the module level (not within a control method.) These opcodes are 
 executed 
 exactly once at the time the table is loaded. This type of code was legal 
 up 
 until the release of ACPI 2.0B (2002) and is now supported within ACPI CA 
 in 
 order to provide backwards compatibility with earlier BIOS 
 implementations. 
 This eliminates the "Encountered executable code at module level" warning 
 that was previously generated upon detection of such code.
 
 Fixed a problem in the interpreter where an AE_NOT_FOUND exception could 
 inadvertently be generated during the lookup of namespace objects in the 
 second pass parse of ACPI tables and control methods. It appears that 
 this 
 problem could occur during the resolution of forward references to 
 namespace 
 objects.
 
 Added the ACPI_MUTEX_DEBUG #ifdef to the AcpiUtReleaseMutex function, 
 corresponding to the same #ifdef in the AcpiUtAcquireMutex function. This 
 allows the deadlock detection debug code to be compiled out in the normal 
 case, improving mutex performance (and overall subsystem performance) 
 considerably.
 
 Implemented a handful of miscellaneous fixes for possible memory leaks on 
 error conditions and error handling control paths. These fixes were 
 suggested by FreeBSD and the Coverity Prevent source code analysis tool.
 
 Added a check for a null RSDT pointer in AcpiGetFirmwareTable 
 (tbxfroot.c) 
 to prevent a fault in this error case.
 
 Code and Data Size: Current and previous core subsystem library sizes are 
 shown below. These are the code and data sizes for the acpica.lib 
 produced 
 by the Microsoft Visual C++ 6.0 compiler, and these values do not include 
 any ACPI driver or OSPM code. The debug version of the code includes the 
 debug output trace mechanism and has a much larger code and data size. 
 Note 
 that these values will vary depending on the efficiency of the compiler 
 and 
 the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  78.2K Code, 11.6K Data,  89.8K Total
     Debug Version:     163.7K Code, 69.3K Data, 233.0K Total
   Current Release:
     Non-Debug Version:  78.1K Code, 11.6K Data,  89.7K Total
     Debug Version:     164.0K Code, 69.3K Data, 233.3K Total
 
 
 2) iASL Compiler/Disassembler:
 
 Implemented support to allow Type 1 and Type 2 ASL operators to appear at 
 the module level (not within a control method.) These operators will be 
 executed once at the time the table is loaded. This type of code was 
 legal 
 up until the release of ACPI 2.0B (2002) and is now supported by the iASL 
 compiler in order to provide backwards compatibility with earlier BIOS 
 ASL 
 code.
 
 The ACPI integer width (specified via the table revision ID or the -r 
 override, 32 or 64 bits) is now used internally during compile-time 
 constant 
 folding to ensure that constants are truncated to 32 bits if necessary. 
 Previously, the revision ID value was only emitted in the AML table 
 header.
 
 An error message is now generated for the Mutex and Method operators if 
 the 
 SyncLevel parameter is outside the legal range of 0 through 15.
 
 Fixed a problem with the Method operator ParameterTypes list handling 
 (ACPI 
 3.0). Previously, more than 2 types or 2 arguments generated a syntax 
 error.  
 The actual underlying implementation of method argument typechecking is 
 still under development, however.
 
 ----------------------------------------
 13 May 2005.  Summary of changes for version 20050513:
 
 1) ACPI CA Core Subsystem:
 
 Implemented support for PCI Express root bridges -- added support for 
 device 
 PNP0A08 in the root bridge search within AcpiEvPciConfigRegionSetup.
 
 The interpreter now automatically truncates incoming 64-bit constants to 
 32 
 bits if currently executing out of a 32-bit ACPI table (Revision < 2). 
 This 
 also affects the iASL compiler constant folding. (Note: as per below, the 
 iASL compiler no longer allows 64-bit constants within 32-bit tables.)
 
 Fixed a problem where string and buffer objects with "static" pointers 
 (pointers to initialization data within an ACPI table) were not handled 
 consistently. The internal object copy operation now always copies the 
 data 
 to a newly allocated buffer, regardless of whether the source object is 
 static or not.
 
 Fixed a problem with the FromBCD operator where an implicit result 
 conversion was improperly performed while storing the result to the 
 target 
 operand. Since this is an "explicit conversion" operator, the implicit 
 conversion should never be performed on the output.
 
 Fixed a problem with the CopyObject operator where a copy to an existing 
 named object did not always completely overwrite the existing object 
 stored 
 at name. Specifically, a buffer-to-buffer copy did not delete the 
 existing 
 buffer.
 
 Replaced "InterruptLevel" with "InterruptNumber" in all GPE interfaces 
 and 
 structs for consistency.
 
 Code and Data Size: Current and previous core subsystem library sizes are 
 shown below. These are the code and data sizes for the acpica.lib 
 produced 
 by the Microsoft Visual C++ 6.0 compiler, and these values do not include 
 any ACPI driver or OSPM code. The debug version of the code includes the 
 debug output trace mechanism and has a much larger code and data size. 
 Note 
 that these values will vary depending on the efficiency of the compiler 
 and 
 the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  78.2K Code, 11.6K Data,  89.8K Total
     Debug Version:     163.7K Code, 69.3K Data, 233.0K Total
   Current Release: (Same sizes)
     Non-Debug Version:  78.2K Code, 11.6K Data,  89.8K Total
     Debug Version:     163.7K Code, 69.3K Data, 233.0K Total
 
 
 2) iASL Compiler/Disassembler:
 
 The compiler now emits a warning if an attempt is made to generate a 64-
 bit 
 integer constant from within a 32-bit ACPI table (Revision < 2). The 
 integer 
 is truncated to 32 bits.
 
 Fixed a problem with large package objects: if the static length of the 
 package is greater than 255, the "variable length package" opcode is 
 emitted. Previously, this caused an error. This requires an update to the 
 ACPI spec, since it currently (incorrectly) states that packages larger 
 than 
 255 elements are not allowed.
 
 The disassembler now correctly handles variable length packages and 
 packages 
 larger than 255 elements.
 
 ----------------------------------------
 08 April 2005.  Summary of changes for version 20050408:
 
 1) ACPI CA Core Subsystem:
 
 Fixed three cases in the interpreter where an "index" argument to an ASL 
 function was still (internally) 32 bits instead of the required 64 bits. 
 This was the Index argument to the Index, Mid, and Match operators.
 
 The "strupr" function is now permanently local (AcpiUtStrupr), since this 
 is 
 not a POSIX-defined function and not present in most kernel-level C 
 libraries. All references to the C library strupr function have been 
 removed 
 from the headers.
 
 Completed the deployment of static functions/prototypes. All prototypes 
 with 
 the static attribute have been moved from the headers to the owning C 
 file.
 
 Implemented an extract option (-e) for the AcpiBin utility (AML binary 
 utility). This option allows the utility to extract individual ACPI 
 tables 
 from the output of AcpiDmp. It provides the same functionality of the 
 acpixtract.pl perl script without the worry of setting the correct perl 
 options. AcpiBin runs on Windows and has not yet been generated/validated 
 in 
 the Linux/Unix environment (but should be soon).
  
 Updated and fixed the table dump option for AcpiBin (-d). This option 
 converts a single ACPI table to a hex/ascii file, similar to the output 
 of 
 AcpiDmp.
 
 Code and Data Size: Current and previous core subsystem library sizes are 
 shown below. These are the code and data sizes for the acpica.lib 
 produced 
 by the Microsoft Visual C++ 6.0 compiler, and these values do not include 
 any ACPI driver or OSPM code. The debug version of the code includes the 
 debug output trace mechanism and has a much larger code and data size. 
 Note 
 that these values will vary depending on the efficiency of the compiler 
 and 
 the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  78.0K Code, 11.6K Data,  89.6K Total
     Debug Version:     163.5K Code, 69.3K Data, 232.8K Total
   Current Release:
     Non-Debug Version:  78.2K Code, 11.6K Data,  89.8K Total
     Debug Version:     163.7K Code, 69.3K Data, 233.0K Total
 
 
 2) iASL Compiler/Disassembler:
 
 Disassembler fix: Added a check to ensure that the table length found in 
 the 
 ACPI table header within the input file is not longer than the actual 
 input 
 file size. This indicates some kind of file or table corruption.
 
 ----------------------------------------
 29 March 2005.  Summary of changes for version 20050329:
 
 1) ACPI CA Core Subsystem:
 
 An error is now generated if an attempt is made to create a Buffer Field 
 of 
 length zero (A CreateField with a length operand of zero.)
 
 The interpreter now issues a warning whenever executable code at the 
 module 
 level is detected during ACPI table load. This will give some idea of the 
 prevalence of this type of code.
 
 Implemented support for references to named objects (other than control 
 methods) within package objects.
 
 Enhanced package object output for the debug object. Package objects are 
 now 
 completely dumped, showing all elements.
 
 Enhanced miscellaneous object output for the debug object. Any object can 
 now be written to the debug object (for example, a device object can be 
 written, and the type of the object will be displayed.)
 
 The "static" qualifier has been added to all local functions across both 
 the 
 core subsystem and the iASL compiler.
 
 The number of "long" lines (> 80 chars) within the source has been 
 significantly reduced, by about 1/3.
 
 Cleaned up all header files to ensure that all CA/iASL functions are 
 prototyped (even static functions) and the formatting is consistent.
 
 Two new header files have been added, acopcode.h and acnames.h.
 
 Removed several obsolete functions that were no longer used.
 
 Code and Data Size: Current and previous core subsystem library sizes are 
 shown below. These are the code and data sizes for the acpica.lib 
 produced 
 by the Microsoft Visual C++ 6.0 compiler, and these values do not include 
 any ACPI driver or OSPM code. The debug version of the code includes the 
 debug output trace mechanism and has a much larger code and data size. 
 Note 
 that these values will vary depending on the efficiency of the compiler 
 and 
 the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  78.3K Code, 11.5K Data,  89.8K Total
     Debug Version:     165.4K Code, 69.7K Data, 236.1K Total
   Current Release:
     Non-Debug Version:  78.0K Code, 11.6K Data,  89.6K Total
     Debug Version:     163.5K Code, 69.3K Data, 232.8K Total
 
 
 
 2) iASL Compiler/Disassembler:
 
 Fixed a problem with the resource descriptor generation/support. For the 
 ResourceSourceIndex and the ResourceSource fields, both must be present, 
 or 
 both must be not present - can't have one without the other.
 
 The compiler now returns non-zero from the main procedure if any errors 
 have 
 occurred during the compilation.
 
 
 ----------------------------------------
 09 March 2005.  Summary of changes for version 20050309:
 
 1) ACPI CA Core Subsystem:
 
 The string-to-buffer implicit conversion code has been modified again 
 after 
 a change to the ACPI specification.  In order to match the behavior of 
 the 
 other major ACPI implementation, the target buffer is no longer truncated 
 if 
 the source string is smaller than an existing target buffer. This change 
 requires an update to the ACPI spec, and should eliminate the recent 
 AE_AML_BUFFER_LIMIT issues.
 
 The "implicit return" support was rewritten to a new algorithm that 
 solves 
 the general case. Rather than attempt to determine when a method is about 
 to 
 exit, the result of every ASL operator is saved momentarily until the 
 very 
 next ASL operator is executed. Therefore, no matter how the method exits, 
 there will always be a saved implicit return value. This feature is only 
 enabled with the AcpiGbl_EnableInterpreterSlack flag, and should 
 eliminate 
 AE_AML_NO_RETURN_VALUE errors when enabled.
 
 Implemented implicit conversion support for the predicate (operand) of 
 the 
 If, Else, and While operators. String and Buffer arguments are 
 automatically 
 converted to Integers.
 
 Changed the string-to-integer conversion behavior to match the new ACPI 
 errata: "If no integer object exists, a new integer is created. The ASCII 
 string is interpreted as a hexadecimal constant. Each string character is 
 interpreted as a hexadecimal value ('0'-'9', 'A'-'F', 'a', 'f'), starting 
 with the first character as the most significant digit, and ending with 
 the 
 first non-hexadecimal character or end-of-string." This means that the 
 first 
 non-hex character terminates the conversion and this is the code that was 
 changed.
 
 Fixed a problem where the ObjectType operator would fail (fault) when 
 used 
 on an Index of a Package which pointed to a null package element. The 
 operator now properly returns zero (Uninitialized) in this case.
 
 Fixed a problem where the While operator used excessive memory by not 
 properly popping the result stack during execution. There was no memory 
 leak 
 after execution, however. (Code provided by Valery Podrezov.)
 
 Fixed a problem where references to control methods within Package 
 objects 
 caused the method to be invoked, instead of producing a reference object 
 pointing to the method.
 
 Restructured and simplified the pswalk.c module (AcpiPsDeleteParseTree) 
 to 
 improve performance and reduce code size. (Code provided by Alexey 
 Starikovskiy.)
 
 Code and Data Size: Current and previous core subsystem library sizes are 
 shown below. These are the code and data sizes for the acpica.lib 
 produced 
 by the Microsoft Visual C++ 6.0 compiler, and these values do not include 
 any ACPI driver or OSPM code. The debug version of the code includes the 
 debug output trace mechanism and has a much larger code and data size. 
 Note 
 that these values will vary depending on the efficiency of the compiler 
 and 
 the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  78.3K Code, 11.5K Data,  89.8K Total
     Debug Version:     165.4K Code, 69.6K Data, 236.0K Total
   Current Release:
     Non-Debug Version:  78.3K Code, 11.5K Data,  89.8K Total
     Debug Version:     165.4K Code, 69.7K Data, 236.1K Total
 
 
 2) iASL Compiler/Disassembler:
 
 Fixed a problem with the Return operator with no arguments. Since the AML 
 grammar for the byte encoding requires an operand for the Return opcode, 
 the 
 compiler now emits a Return(Zero) for this case.  An ACPI specification 
 update has been written for this case.
 
 For tables other than the DSDT, namepath optimization is automatically 
 disabled. This is because SSDTs can be loaded anywhere in the namespace, 
 the 
 compiler has no knowledge of where, and thus cannot optimize namepaths.
 
 Added "ProcessorObj" to the ObjectTypeKeyword list. This object type was 
 inadvertently omitted from the ACPI specification, and will require an 
 update to the spec.
 
 The source file scan for ASCII characters is now optional (-a). This 
 change 
 was made because some vendors place non-ascii characters within comments. 
 However, the scan is simply a brute-force byte compare to ensure all 
 characters in the file are in the range 0x00 to 0x7F.
 
 Fixed a problem with the CondRefOf operator where the compiler was 
 inappropriately checking for the existence of the target. Since the point 
 of 
 the operator is to check for the existence of the target at run-time, the 
 compiler no longer checks for the target existence.
 
 Fixed a problem where errors generated from the internal AML interpreter 
 during constant folding were not handled properly, causing a fault.
 
 Fixed a problem with overly aggressive range checking for the Stall 
 operator. The valid range (max 255) is now only checked if the operand is 
 of 
 type Integer. All other operand types cannot be statically checked.
 
 Fixed a problem where control method references within the RefOf, 
 DeRefOf, 
 and ObjectType operators were not treated properly. They are now treated 
 as 
 actual references, not method invocations.
 
 Fixed and enhanced the "list namespace" option (-ln). This option was 
 broken 
 a number of releases ago.
 
 Improved error handling for the Field, IndexField, and BankField 
 operators. 
 The compiler now cleanly reports and recovers from errors in the field 
 component (FieldUnit) list.
 
 Fixed a disassembler problem where the optional ResourceDescriptor fields 
 TRS and TTP were not always handled correctly.
 
 Disassembler - Comments in output now use "//" instead of "/*"
 
 ----------------------------------------
 28 February 2005.  Summary of changes for version 20050228:
 
 1) ACPI CA Core Subsystem:
 
 Fixed a problem where the result of an Index() operator (an object 
 reference) must increment the reference count on the target object for 
 the 
 life of the object reference.
 
 Implemented AML Interpreter and Debugger support for the new ACPI 3.0 
 Extended Address (IO, Memory, Space), QwordSpace, DwordSpace, and 
 WordSpace 
 resource descriptors.
 
 Implemented support in the _OSI method for the ACPI 3.0 "Extended Address 
 Space Descriptor" string, indicating interpreter support for the 
 descriptors 
 above.
 
 Implemented header support for the new ACPI 3.0 FADT flag bits.
 
 Implemented header support for the new ACPI 3.0 PCI Express bits for the 
 PM1 
 status/enable registers.
 
 Updated header support for the MADT processor local Apic struct and MADT 
 platform interrupt source struct for new ACPI 3.0 fields.
 
 Implemented header support for the SRAT and SLIT ACPI tables.
 
 Implemented the -s switch in AcpiExec to enable the "InterpreterSlack" 
 flag 
 at runtime.
 
 Code and Data Size: Current and previous core subsystem library sizes are 
 shown below. These are the code and data sizes for the acpica.lib 
 produced 
 by the Microsoft Visual C++ 6.0 compiler, and these values do not include 
 any ACPI driver or OSPM code. The debug version of the code includes the 
 debug output trace mechanism and has a much larger code and data size. 
 Note 
 that these values will vary depending on the efficiency of the compiler 
 and 
 the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  78.2K Code, 11.5K Data,  89.7K Total
     Debug Version:     164.9K Code, 69.2K Data, 234.1K Total
   Current Release:
     Non-Debug Version:  78.3K Code, 11.5K Data,  89.8K Total
     Debug Version:     165.4K Code, 69.6K Data, 236.0K Total
 
 
 2) iASL Compiler/Disassembler:
 
 Fixed a problem with the internal 64-bit String-to-integer conversion 
 with 
 strings less than two characters long.
 
 Fixed a problem with constant folding where the result of the Index() 
 operator can not be considered a constant. This means that Index() cannot 
 be 
 a type3 opcode and this will require an update to the ACPI specification.
 
 Disassembler: Implemented support for the TTP, MTP, and TRS resource 
 descriptor fields. These fields were inadvertently ignored and not output 
 in 
 the disassembly of the resource descriptor.
 
 
  ----------------------------------------
 11 February 2005.  Summary of changes for version 20050211:
 
 1) ACPI CA Core Subsystem:
 
 Implemented ACPI 3.0 support for implicit conversion within the Match() 
 operator. MatchObjects can now be of type integer, buffer, or string 
 instead 
 of just type integer.  Package elements are implicitly converted to the 
 type 
 of the MatchObject. This change aligns the behavior of Match() with the 
 behavior of the other logical operators (LLess(), etc.) It also requires 
 an 
 errata change to the ACPI specification as this support was intended for 
 ACPI 3.0, but was inadvertently omitted.
 
 Fixed a problem with the internal implicit "to buffer" conversion. 
 Strings 
 that are converted to buffers will cause buffer truncation if the string 
 is 
 smaller than the target buffer. Integers that are converted to buffers 
 will 
 not cause buffer truncation, only zero extension (both as per the ACPI 
 spec.) The problem was introduced when code was added to truncate the 
 buffer, but this should not be performed in all cases, only the string 
 case.
 
 Fixed a problem with the Buffer and Package operators where the 
 interpreter 
 would get confused if two such operators were used as operands to an ASL 
 operator (such as LLess(Buffer(1){0},Buffer(1){1}). The internal result 
 stack was not being popped after the execution of these operators, 
 resulting 
 in an AE_NO_RETURN_VALUE exception.
 
 Fixed a problem with constructs of the form Store(Index(...),...). The 
 reference object returned from Index was inadvertently resolved to an 
 actual 
 value. This problem was introduced in version 20050114 when the behavior 
 of 
 Store() was modified to restrict the object types that can be used as the 
 source operand (to match the ACPI specification.)
 
 Reduced excessive stack use within the AcpiGetObjectInfo procedure.
 
 Added a fix to aclinux.h to allow generation of AcpiExec on Linux.
 
 Updated the AcpiSrc utility to add the FADT_DESCRIPTOR_REV2_MINUS struct.
 
 Code and Data Size: Current and previous core subsystem library sizes are 
 shown below. These are the code and data sizes for the acpica.lib 
 produced 
 by the Microsoft Visual C++ 6.0 compiler, and these values do not include 
 any ACPI driver or OSPM code. The debug version of the code includes the 
 debug output trace mechanism and has a much larger code and data size. 
 Note 
 that these values will vary depending on the efficiency of the compiler 
 and 
 the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  78.1K Code, 11.5K Data,  89.6K Total
     Debug Version:     164.8K Code, 69.2K Data, 234.0K Total
   Current Release:
     Non-Debug Version:  78.2K Code, 11.5K Data,  89.7K Total
     Debug Version:     164.9K Code, 69.2K Data, 234.1K Total
 
 
 2) iASL Compiler/Disassembler:
 
 Fixed a code generation problem in the constant folding optimization code 
 where incorrect code was generated if a constant was reduced to a buffer 
 object (i.e., a reduced type 5 opcode.)
 
 Fixed a typechecking problem for the ToBuffer operator. Caused by an 
 incorrect return type in the internal opcode information table.
 
 ----------------------------------------
 25 January 2005.  Summary of changes for version 20050125:
 
 1) ACPI CA Core Subsystem:
 
 Fixed a recently introduced problem with the Global Lock where the 
 underlying semaphore was not created.  This problem was introduced in 
 version 20050114, and caused an AE_AML_NO_OPERAND exception during an 
 Acquire() operation on _GL.
 
 The local object cache is now optional, and is disabled by default. Both 
 AcpiExec and the iASL compiler enable the cache because they run in user 
 mode and this enhances their performance. #define 
 ACPI_ENABLE_OBJECT_CACHE 
 to enable the local cache.
 
 Fixed an issue in the internal function AcpiUtEvaluateObject concerning 
 the 
 optional "implicit return" support where an error was returned if no 
 return 
 object was expected, but one was implicitly returned. AE_OK is now 
 returned 
 in this case and the implicitly returned object is deleted. 
 AcpiUtEvaluateObject is only occasionally used, and only to execute 
 reserved 
 methods such as _STA and _INI where the return type is known up front.
 
 Fixed a few issues with the internal convert-to-integer code. It now 
 returns 
 an error if an attempt is made to convert a null string, a string of only 
 blanks/tabs, or a zero-length buffer. This affects both implicit 
 conversion 
 and explicit conversion via the ToInteger() operator.
 
 The internal debug code in AcpiUtAcquireMutex has been commented out. It 
 is 
 not needed for normal operation and should increase the performance of 
 the 
 entire subsystem. The code remains in case it is needed for debug 
 purposes 
 again.
 
 The AcpiExec source and makefile are included in the Unix/Linux package 
 for 
 the first time.
 
 Code and Data Size: Current and previous core subsystem library sizes are 
 shown below. These are the code and data sizes for the acpica.lib 
 produced 
 by the Microsoft Visual C++ 6.0 compiler, and these values do not include 
 any ACPI driver or OSPM code. The debug version of the code includes the 
 debug output trace mechanism and has a much larger code and data size. 
 Note 
 that these values will vary depending on the efficiency of the compiler 
 and 
 the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  78.4K Code,  11.5K Data,   89.9K Total
     Debug Version:     165.4K Code,  69.4K Data,  234.8K Total
   Current Release:
     Non-Debug Version:  78.1K Code,  11.5K Data,   89.6K Total
     Debug Version:     164.8K Code,  69.2K Data,  234.0K Total
 
 2) iASL Compiler/Disassembler:
 
 Switch/Case support: A warning is now issued if the type of the Switch 
 value 
 cannot be determined at compile time. For example, Switch(Arg0) will 
 generate the warning, and the type is assumed to be an integer. As per 
 the 
 ACPI spec, use a construct such as Switch(ToInteger(Arg0)) to eliminate 
 the 
 warning.
 
 Switch/Case support: Implemented support for buffer and string objects as 
 the switch value.  This is an ACPI 3.0 feature, now that LEqual supports 
 buffers and strings.
 
 Switch/Case support: The emitted code for the LEqual() comparisons now 
 uses 
 the switch value as the first operand, not the second. The case value is 
 now 
 the second operand, and this allows the case value to be implicitly 
 converted to the type of the switch value, not the other way around.
 
 Switch/Case support: Temporary variables are now emitted immediately 
 within 
 the control method, not at the global level. This means that there are 
 now 
 36 temps available per-method, not 36 temps per-module as was the case 
 with 
 the earlier implementation (_T_0 through _T_9 and _T_A through _T_Z.)
 
 ----------------------------------------
 14 January 2005.  Summary of changes for version 20050114:
 
 Added 2005 copyright to all module headers.  This affects every module in 
 the core subsystem, iASL compiler, and the utilities.
 
 1) ACPI CA Core Subsystem:
 
 Fixed an issue with the String-to-Buffer conversion code where the string 
 null terminator was not included in the buffer after conversion, but 
 there 
 is existing ASL that assumes the string null terminator is included. This 
 is 
 the root of the ACPI_AML_BUFFER_LIMIT regression. This problem was 
 introduced in the previous version when the code was updated to correctly 
 set the converted buffer size as per the ACPI specification. The ACPI 
 spec 
 is ambiguous and will be updated to specify that the null terminator must 
 be 
 included in the converted buffer. This also affects the ToBuffer() ASL 
 operator.
 
 Fixed a problem with the Mid() ASL/AML operator where it did not work 
 correctly on Buffer objects. Newly created sub-buffers were not being 
 marked 
 as initialized.
 
 
 Fixed a problem in AcpiTbFindTable where incorrect string compares were 
 performed on the OemId and OemTableId table header fields.  These fields 
 are 
 not null terminated, so strncmp is now used instead of strcmp.
 
 Implemented a restriction on the Store() ASL/AML operator to align the 
 behavior with the ACPI specification.  Previously, any object could be 
 used 
 as the source operand.  Now, the only objects that may be used are 
 Integers, 
 Buffers, Strings, Packages, Object References, and DDB Handles.  If 
 necessary, the original behavior can be restored by enabling the 
 EnableInterpreterSlack flag.
 
 Enhanced the optional "implicit return" support to allow an implicit 
 return 
 value from methods that are invoked externally via the AcpiEvaluateObject 
 interface.  This enables implicit returns from the _STA and _INI methods, 
 for example.
 
 Changed the Revision() ASL/AML operator to return the current version of 
 the 
 AML interpreter, in the YYYYMMDD format. Previously, it incorrectly 
 returned 
 the supported ACPI version (This is the function of the _REV method).
 
 Updated the _REV predefined method to return the currently supported 
 version 
 of ACPI, now 3.
 
 Implemented batch mode option for the AcpiExec utility (-b).
 
 Code and Data Size: Current and previous core subsystem library sizes are 
 shown below. These are the code and data sizes for the acpica.lib 
 produced 
 by the Microsoft Visual C++ 6.0 compiler, and these values do not include 
 any ACPI driver or OSPM code. The debug version of the code includes the 
 debug output trace mechanism and has a much larger code and data size. 
 Note 
 that these values will vary depending on the efficiency of the compiler 
 and 
 the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  78.3K Code,  11.5K Data,   89.8K Total
     Debug Version:     165.3K Code,  69.4K Data,  234.7K Total
   Current Release:
     Non-Debug Version:  78.4K Code,  11.5K Data,   89.9K Total
     Debug Version:     165.4K Code,  69.4K Data,  234.8K Total
 
 ----------------------------------------
 10 December 2004.  Summary of changes for version 20041210:
 
 ACPI 3.0 support is nearing completion in both the iASL compiler and the 
 ACPI CA core subsystem.
 
 1) ACPI CA Core Subsystem:
 
 Fixed a problem in the ToDecimalString operator where the resulting 
 string 
 length was incorrectly calculated. The length is now calculated exactly, 
 eliminating incorrect AE_STRING_LIMIT exceptions.
 
 Fixed a problem in the ToHexString operator to allow a maximum 200 
 character 
 string to be produced.
 
 Fixed a problem in the internal string-to-buffer and buffer-to-buffer 
 copy 
 routine where the length of the resulting buffer was not truncated to the 
 new size (if the target buffer already existed).
 
 Code and Data Size: Current and previous core subsystem library sizes are 
 shown below. These are the code and data sizes for the acpica.lib 
 produced 
 by the Microsoft Visual C++ 6.0 compiler, and these values do not include 
 any ACPI driver or OSPM code. The debug version of the code includes the 
 debug output trace mechanism and has a much larger code and data size. 
 Note 
 that these values will vary depending on the efficiency of the compiler 
 and 
 the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  78.3K Code,  11.5K Data,   89.8K Total
     Debug Version:     164.7K Code,  68.5K Data,  233.2K Total
   Current Release:
     Non-Debug Version:  78.3K Code,  11.5K Data,   89.8K Total
     Debug Version:     165.3K Code,  69.4K Data,  234.7K Total
 
 
 2) iASL Compiler/Disassembler:
 
 Implemented the new ACPI 3.0 resource template macros - DWordSpace, 
 ExtendedIO, ExtendedMemory, ExtendedSpace, QWordSpace, and WordSpace. 
 Includes support in the disassembler.
 
 Implemented support for the new (ACPI 3.0) parameter to the Register 
 macro, 
 AccessSize.
 
 Fixed a problem where the _HE resource name for the Interrupt macro was 
 referencing bit 0 instead of bit 1.
 
 Implemented check for maximum 255 interrupts in the Interrupt macro.
 
 Fixed a problem with the predefined resource descriptor names where 
 incorrect AML code was generated if the offset within the resource buffer 
 was 0 or 1.  The optimizer shortened the AML code to a single byte opcode 
 but did not update the surrounding package lengths.
 
 Changes to the Dma macro:  All channels within the channel list must be 
 in 
 the range 0-7.  Maximum 8 channels can be specified. BusMaster operand is 
 optional (default is BusMaster).
 
 Implemented check for maximum 7 data bytes for the VendorShort macro.
 
 The ReadWrite parameter is now optional for the Memory32 and similar 
 macros.
 
 ----------------------------------------
 03 December 2004.  Summary of changes for version 20041203:
 
 1) ACPI CA Core Subsystem:
 
 The low-level field insertion/extraction code (exfldio) has been 
 completely 
 rewritten to eliminate unnecessary complexity, bugs, and boundary 
 conditions.
 
 Fixed a problem in the ToInteger, ToBuffer, ToHexString, and 
 ToDecimalString 
 operators where the input operand could be inadvertently deleted if no 
 conversion was necessary (e.g., if the input to ToInteger was an Integer 
 object.)
 
 Fixed a problem with the ToDecimalString and ToHexString where an 
 incorrect 
 exception code was returned if the resulting string would be > 200 chars.  
 AE_STRING_LIMIT is now returned.
 
 Fixed a problem with the Concatenate operator where AE_OK was always 
 returned, even if the operation failed.
 
 Fixed a problem in oswinxf (used by AcpiExec and iASL) to allow > 128 
 semaphores to be allocated.
 
 Code and Data Size: Current and previous core subsystem library sizes are 
 shown below. These are the code and data sizes for the acpica.lib 
 produced 
 by the Microsoft Visual C++ 6.0 compiler, and these values do not include 
 any ACPI driver or OSPM code. The debug version of the code includes the 
 debug output trace mechanism and has a much larger code and data size. 
 Note 
 that these values will vary depending on the efficiency of the compiler 
 and 
 the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  78.5K Code,  11.5K Data,   90.0K Total
     Debug Version:     165.2K Code,  68.6K Data,  233.8K Total
   Current Release:
     Non-Debug Version:  78.3K Code,  11.5K Data,   89.8K Total
     Debug Version:     164.7K Code,  68.5K Data,  233.2K Total
 
 
 2) iASL Compiler/Disassembler:
 
 Fixed typechecking for the ObjectType and SizeOf operators.  Problem was 
 recently introduced in 20041119.
 
 Fixed a problem with the ToUUID macro where the upper nybble of each 
 buffer 
 byte was inadvertently set to zero.
 
 ----------------------------------------
 19 November 2004.  Summary of changes for version 20041119:
 
 1) ACPI CA Core Subsystem:
 
 Fixed a problem in the internal ConvertToInteger routine where new 
 integers 
 were not truncated to 32 bits for 32-bit ACPI tables. This routine 
 converts 
 buffers and strings to integers.
 
 Implemented support to store a value to an Index() on a String object. 
 This 
 is an ACPI 2.0 feature that had not yet been implemented.
 
 Implemented new behavior for storing objects to individual package 
 elements 
 (via the Index() operator). The previous behavior was to invoke the 
 implicit 
 conversion rules if an object was already present at the index.  The new 
 behavior is to simply delete any existing object and directly store the 
 new 
 object. Although the ACPI specification seems unclear on this subject, 
 other 
 ACPI implementations behave in this manner.  (This is the root of the 
 AE_BAD_HEX_CONSTANT issue.)
 
 Modified the RSDP memory scan mechanism to support the extended checksum 
 for 
 ACPI 2.0 (and above) RSDPs. Note that the search continues until a valid 
 RSDP signature is found with a valid checksum.
 
 Code and Data Size: Current and previous core subsystem library sizes are 
 shown below. These are the code and data sizes for the acpica.lib 
 produced 
 by the Microsoft Visual C++ 6.0 compiler, and these values do not include 
 any ACPI driver or OSPM code. The debug version of the code includes the 
 debug output trace mechanism and has a much larger code and data size. 
 Note 
 that these values will vary depending on the efficiency of the compiler 
 and 
 the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  78.5K Code,  11.5K Data,   90.0K Total
     Debug Version:     165.2K Code,  68.6K Data,  233.8K Total
   Current Release:
     Non-Debug Version:  78.5K Code,  11.5K Data,   90.0K Total
     Debug Version:     165.2K Code,  68.6K Data,  233.8K Total
 
 
 2) iASL Compiler/Disassembler:
 
 Fixed a missing semicolon in the aslcompiler.y file.
 
 ----------------------------------------
 05 November 2004.  Summary of changes for version 20041105:
 
 1) ACPI CA Core Subsystem:
 
 Implemented support for FADT revision 2.  This was an interim table 
 (between 
 ACPI 1.0 and ACPI 2.0) that adds support for the FADT reset register.
 
 Implemented optional support to allow uninitialized LocalX and ArgX 
 variables in a control method.  The variables are initialized to an 
 Integer 
 object with a value of zero.  This support is enabled by setting the 
 AcpiGbl_EnableInterpreterSlack flag to TRUE.
 
 Implemented support for Integer objects for the SizeOf operator.  Either 
 4 
 or 8 is returned, depending on the current integer size (32-bit or 64-
 bit, 
 depending on the parent table revision).
 
 Fixed a problem in the implementation of the SizeOf and ObjectType 
 operators 
 where the operand was resolved to a value too early, causing incorrect 
 return values for some objects.
 
 Fixed some possible memory leaks during exceptional conditions.
 
 Code and Data Size: Current and previous core subsystem library sizes are 
 shown below. These are the code and data sizes for the acpica.lib 
 produced 
 by the Microsoft Visual C++ 6.0 compiler, and these values do not include 
 any ACPI driver or OSPM code. The debug version of the code includes the 
 debug output trace mechanism and has a much larger code and data size. 
 Note 
 that these values will vary depending on the efficiency of the compiler 
 and 
 the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  78.0K Code,  11.5K Data,   89.5K Total
     Debug Version:     164.8K Code,  68.6K Data,  233.4K Total
   Current Release:
     Non-Debug Version:  78.5K Code,  11.5K Data,   90.0K Total
     Debug Version:     165.2K Code,  68.6K Data,  233.8K Total
 
 
 2) iASL Compiler/Disassembler:
 
 Implemented support for all ACPI 3.0 reserved names and methods.
 
 Implemented all ACPI 3.0 grammar elements in the front-end, including 
 support for semicolons.
 
 Implemented the ACPI 3.0 Function() and ToUUID() macros
 
 Fixed a problem in the disassembler where a Scope() operator would not be 
 emitted properly if the target of the scope was in another table.
 
 ----------------------------------------
 15 October 2004.  Summary of changes for version 20041015:
 
 Note:  ACPI CA is currently undergoing an in-depth and complete formal 
 evaluation to test/verify the following areas. Other suggestions are 
 welcome. This will result in an increase in the frequency of releases and 
 the number of bug fixes in the next few months.
   - Functional tests for all ASL/AML operators
   - All implicit/explicit type conversions
   - Bit fields and operation regions
   - 64-bit math support and 32-bit-only "truncated" math support
   - Exceptional conditions, both compiler and interpreter
   - Dynamic object deletion and memory leaks
   - ACPI 3.0 support when implemented
   - External interfaces to the ACPI subsystem
 
 
 1) ACPI CA Core Subsystem:
 
 Fixed two alignment issues on 64-bit platforms - within debug statements 
 in 
 AcpiEvGpeDetect and AcpiEvCreateGpeBlock. Removed references to the 
 Address 
 field within the non-aligned ACPI generic address structure.
 
 Fixed a problem in the Increment and Decrement operators where incorrect 
 operand resolution could result in the inadvertent modification of the 
 original integer when the integer is passed into another method as an 
 argument and the arg is then incremented/decremented.
 
 Fixed a problem in the FromBCD operator where the upper 32-bits of a 64-
 bit 
 BCD number were truncated during conversion.
 
 Fixed a problem in the ToDecimal operator where the length of the 
 resulting 
 string could be set incorrectly too long if the input operand was a 
 Buffer 
 object.
 
 Fixed a problem in the Logical operators (LLess, etc.) where a NULL byte 
 (0) 
 within a buffer would prematurely terminate a compare between buffer 
 objects.
 
 Added a check for string overflow (>200 characters as per the ACPI 
 specification) during the Concatenate operator with two string operands.
 
 Code and Data Size: Current and previous core subsystem library sizes are 
 shown below. These are the code and data sizes for the acpica.lib 
 produced 
 by the Microsoft Visual C++ 6.0 compiler, and these values do not include 
 any ACPI driver or OSPM code. The debug version of the code includes the 
 debug output trace mechanism and has a much larger code and data size. 
 Note 
 that these values will vary depending on the efficiency of the compiler 
 and 
 the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  77.8K Code,  11.5K Data,   89.3K Total
     Debug Version:     164.6K Code,  68.5K Data,  233.1K Total
   Current Release:
     Non-Debug Version:  78.0K Code,  11.5K Data,   89.5K Total
     Debug Version:     164.8K Code,  68.6K Data,  233.4K Total
 
 
 
 2) iASL Compiler/Disassembler:
 
 Allow the use of the ObjectType operator on uninitialized Locals and Args 
 (returns 0 as per the ACPI specification).
 
 Fixed a problem where the compiler would fault if there was a syntax 
 error 
 in the FieldName of all of the various CreateXXXField operators.
 
 Disallow the use of lower case letters within the EISAID macro, as per 
 the 
 ACPI specification.  All EISAID strings must be of the form "UUUNNNN" 
 Where 
 U is an uppercase letter and N is a hex digit.
 
 
 ----------------------------------------
 06 October 2004.  Summary of changes for version 20041006:
 
 1) ACPI CA Core Subsystem:
 
 Implemented support for the ACPI 3.0 Timer operator. This ASL function 
 implements a 64-bit timer with 100 nanosecond granularity.
 
 Defined a new OSL interface, AcpiOsGetTimer. This interface is used to 
 implement the ACPI 3.0 Timer operator.  This allows the host OS to 
 implement 
 the timer with the best clock available. Also, it keeps the core 
 subsystem 
 out of the clock handling business, since the host OS (usually) performs 
 this function.
 
 Fixed an alignment issue on 64-bit platforms. The HwLowLevelRead(Write) 
 functions use a 64-bit address which is part of the packed ACPI Generic 
 Address Structure. Since the structure is non-aligned, the alignment 
 macros 
 are now used to extract the address to a local variable before use.
 
 Fixed a problem where the ToInteger operator assumed all input strings 
 were 
 hexadecimal. The operator now handles both decimal strings and hex 
 strings 
 (prefixed with "0x").
 
 Fixed a problem where the string length in the string object created as a 
 result of the internal ConvertToString procedure could be incorrect. This 
 potentially affected all implicit conversions and also the 
 ToDecimalString 
 and ToHexString operators.
 
 Fixed two problems in the ToString operator. If the length parameter was 
 zero, an incorrect string object was created and the value of the input 
 length parameter was inadvertently changed from zero to Ones.
 
 Fixed a problem where the optional ResourceSource string in the 
 ExtendedIRQ 
 resource macro was ignored.
 
 Simplified the interfaces to the internal division functions, reducing 
 code 
 size and complexity.
 
 Code and Data Size: Current and previous core subsystem library sizes are 
 shown below. These are the code and data sizes for the acpica.lib 
 produced 
 by the Microsoft Visual C++ 6.0 compiler, and these values do not include 
 any ACPI driver or OSPM code. The debug version of the code includes the 
 debug output trace mechanism and has a much larger code and data size. 
 Note 
 that these values will vary depending on the efficiency of the compiler 
 and 
 the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  77.9K Code,  11.4K Data,   89.3K Total
     Debug Version:     164.5K Code,  68.3K Data,  232.8K Total
   Current Release:
     Non-Debug Version:  77.8K Code,  11.5K Data,   89.3K Total
     Debug Version:     164.6K Code,  68.5K Data,  233.1K Total
 
 
 2) iASL Compiler/Disassembler:
 
 Implemented support for the ACPI 3.0 Timer operator.
 
 Fixed a problem where the Default() operator was inadvertently ignored in 
 a 
 Switch/Case block.  This was a problem in the translation of the Switch 
 statement to If...Else pairs.
 
 Added support to allow a standalone Return operator, with no parentheses 
 (or 
 operands).
 
 Fixed a problem with code generation for the ElseIf operator where the 
 translated Else...If parse tree was improperly constructed leading to the 
 loss of some code.
 
 ----------------------------------------
 22 September 2004.  Summary of changes for version 20040922:
 
 1) ACPI CA Core Subsystem:
 
 Fixed a problem with the implementation of the LNot() operator where 
 "Ones" 
 was not returned for the TRUE case. Changed the code to return Ones 
 instead 
 of (!Arg) which was usually 1. This change affects iASL constant folding 
 for 
 this operator also.
 
 Fixed a problem in AcpiUtInitializeBuffer where an existing buffer was 
 not 
 initialized properly -- Now zero the entire buffer in this case where the 
 buffer already exists.
 
 Changed the interface to AcpiOsSleep from (UINT32 Seconds, UINT32 
 Milliseconds) to simply (ACPI_INTEGER Milliseconds). This simplifies all 
 related code considerably. This will require changes/updates to all OS 
 interface layers (OSLs.)
 
 Implemented a new external interface, AcpiInstallExceptionHandler, to 
 allow 
 a system exception handler to be installed. This handler is invoked upon 
 any 
 run-time exception that occurs during control method execution.
 
 Added support for the DSDT in AcpiTbFindTable. This allows the 
 DataTableRegion() operator to access the local copy of the DSDT.
 
 Code and Data Size: Current and previous core subsystem library sizes are 
 shown below. These are the code and data sizes for the acpica.lib 
 produced 
 by the Microsoft Visual C++ 6.0 compiler, and these values do not include 
 any ACPI driver or OSPM code. The debug version of the code includes the 
 debug output trace mechanism and has a much larger code and data size. 
 Note 
 that these values will vary depending on the efficiency of the compiler 
 and 
 the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  77.8K Code,  11.4K Data,   89.2K Total
     Debug Version:     164.2K Code,  68.2K Data,  232.4K Total
   Current Release:
     Non-Debug Version:  77.9K Code,  11.4K Data,   89.3K Total
     Debug Version:     164.5K Code,  68.3K Data,  232.8K Total
 
 
 2) iASL Compiler/Disassembler:
 
 Fixed a problem with constant folding and the LNot operator. LNot was 
 returning 1 in the TRUE case, not Ones as per the ACPI specification. 
 This 
 could result in the generation of an incorrect folded/reduced constant.
 
 End-Of-File is now allowed within a "//"-style comment.  A parse error no 
 longer occurs if such a comment is at the very end of the input ASL 
 source 
 file.
 
 Implemented the "-r" option to override the Revision in the table header. 
 The initial use of this option will be to simplify the evaluation of the 
 AML 
 interpreter by allowing a single ASL source module to be compiled for 
 either 
 32-bit or 64-bit integers.
 
 
 ----------------------------------------
 27 August 2004.  Summary of changes for version 20040827:
 
 1) ACPI CA Core Subsystem:
 
 - Implemented support for implicit object conversion in the non-numeric 
 logical operators (LEqual, LGreater, LGreaterEqual, LLess, LLessEqual, 
 and 
 LNotEqual.)  Any combination of Integers/Strings/Buffers may now be used; 
 the second operand is implicitly converted on the fly to match the type 
 of 
 the first operand.  For example:
 
     LEqual (Source1, Source2)
 
 Source1 and Source2 must each evaluate to an integer, a string, or a 
 buffer. 
 The data type of Source1 dictates the required type of Source2. Source2 
 is 
 implicitly converted if necessary to match the type of Source1.
 
 - Updated and corrected the behavior of the string conversion support.  
 The 
 rules concerning conversion of buffers to strings (according to the ACPI 
 specification) are as follows:
 
 ToDecimalString - explicit byte-wise conversion of buffer to string of 
 decimal values (0-255) separated by commas. ToHexString - explicit byte-
 wise 
 conversion of buffer to string of hex values (0-FF) separated by commas. 
 ToString - explicit byte-wise conversion of buffer to string.  Byte-by-
 byte 
 copy with no transform except NULL terminated. Any other implicit buffer-
 to-
 string conversion - byte-wise conversion of buffer to string of hex 
 values 
 (0-FF) separated by spaces.
 
 - Fixed typo in definition of AcpiGbl_EnableInterpreterSlack.
 
 - Fixed a problem in AcpiNsGetPathnameLength where the returned length 
 was 
 one byte too short in the case of a node in the root scope.  This could 
 cause a fault during debug output.
 
 - Code and Data Size: Current and previous core subsystem library sizes 
 are 
 shown below.  These are the code and data sizes for the acpica.lib 
 produced 
 by the Microsoft Visual C++ 6.0 compiler, and these values do not include 
 any ACPI driver or OSPM code.  The debug version of the code includes the 
 debug output trace mechanism and has a much larger code and data size.  
 Note 
 that these values will vary depending on the efficiency of the compiler 
 and 
 the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  77.9K Code,  11.5K Data,   89.4K Total
     Debug Version:     164.1K Code,  68.3K Data,  232.4K Total
   Current Release:
     Non-Debug Version:  77.8K Code,  11.4K Data,   89.2K Total
     Debug Version:     164.2K Code,  68.2K Data,  232.4K Total
 
 
 2) iASL Compiler/Disassembler:
 
 - Fixed a Linux generation error.
 
 
 ----------------------------------------
 16 August 2004.  Summary of changes for version 20040816:
 
 1) ACPI CA Core Subsystem:
 
 Designed and implemented support within the AML interpreter for the so-
 called "implicit return".  This support returns the result of the last 
 ASL 
 operation within a control method, in the absence of an explicit Return() 
 operator.  A few machines depend on this behavior, even though it is not 
 explicitly supported by the ASL language.  It is optional support that 
 can 
 be enabled at runtime via the AcpiGbl_EnableInterpreterSlack flag.
 
 Removed support for the PCI_Config address space from the internal low 
 level 
 hardware interfaces (AcpiHwLowLevelRead and AcpiHwLowLevelWrite).  This 
 support was not used internally, and would not work correctly anyway 
 because 
 the PCI bus number and segment number were not supported.  There are 
 separate interfaces for PCI configuration space access because of the 
 unique 
 interface.
 
 Code and Data Size: Current and previous core subsystem library sizes are 
 shown below.  These are the code and data sizes for the acpica.lib 
 produced 
 by the Microsoft Visual C++ 6.0 compiler, and these values do not include 
 any ACPI driver or OSPM code.  The debug version of the code includes the 
 debug output trace mechanism and has a much larger code and data size.  
 Note 
 that these values will vary depending on the efficiency of the compiler 
 and 
 the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  78.0K Code,  11.5K Data,   89.5K Total
     Debug Version:     164.1K Code,  68.2K Data,  232.3K Total
   Current Release:
     Non-Debug Version:  77.9K Code,  11.5K Data,   89.4K Total
     Debug Version:     164.1K Code,  68.3K Data,  232.4K Total
 
 
 2) iASL Compiler/Disassembler:
 
 Fixed a problem where constants in ASL expressions at the root level (not 
 within a control method) could be inadvertently truncated during code 
 generation.  This problem was introduced in the 20040715 release.
 
 
 ----------------------------------------
 15 July 2004.  Summary of changes for version 20040715:
 
 1) ACPI CA Core Subsystem:
 
 Restructured the internal HW GPE interfaces to pass/track the current 
 state 
 of interrupts (enabled/disabled) in order to avoid possible deadlock and 
 increase flexibility of the interfaces.
 
 Implemented a "lexicographical compare" for String and Buffer objects 
 within 
 the logical operators -- LGreater, LLess, LGreaterEqual, and LLessEqual -
 - 
 as per further clarification to the ACPI specification.  Behavior is 
 similar 
 to C library "strcmp".
 
 Completed a major reduction in CPU stack use for the AcpiGetFirmwareTable 
 external function.  In the 32-bit non-debug case, the stack use has been 
 reduced from 168 bytes to 32 bytes.
 
 Deployed a new run-time configuration flag, 
 AcpiGbl_EnableInterpreterSlack, 
 whose purpose is to allow the AML interpreter to forgive certain bad AML 
 constructs.  Default setting is FALSE.
 
 Implemented the first use of AcpiGbl_EnableInterpreterSlack in the Field 
 IO 
 support code.  If enabled, it allows field access to go beyond the end of 
 a 
 region definition if the field is within the region length rounded up to 
 the 
 next access width boundary (a common coding error.)
 
 Renamed OSD_HANDLER to ACPI_OSD_HANDLER, and OSD_EXECUTION_CALLBACK to 
 ACPI_OSD_EXEC_CALLBACK for consistency with other ACPI symbols.  Also, 
 these 
 symbols are lowercase by the latest version of the AcpiSrc tool.
 
 The prototypes for the PCI interfaces in acpiosxf.h have been updated to 
 rename "Register" to simply "Reg" to prevent certain compilers from 
 complaining.
 
 Code and Data Size: Current and previous core subsystem library sizes are 
 shown below.  These are the code and data sizes for the acpica.lib 
 produced 
 by the Microsoft Visual C++ 6.0 compiler, and these values do not include 
 any ACPI driver or OSPM code.  The debug version of the code includes the 
 debug output trace mechanism and has a much larger code and data size.  
 Note 
 that these values will vary depending on the efficiency of the compiler 
 and 
 the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  77.8K Code,  11.5K Data,   89.3K Total
     Debug Version:     163.8K Code,  68.2K Data,  232.0K Total
   Current Release:
     Non-Debug Version:  78.0K Code,  11.5K Data,   89.5K Total
     Debug Version:     164.1K Code,  68.2K Data,  232.3K Total
 
 
 2) iASL Compiler/Disassembler:
 
 Implemented full support for Package objects within the Case() operator.  
 Note: The Break() operator is currently not supported within Case blocks 
 (TermLists) as there is some question about backward compatibility with 
 ACPI 
 1.0 interpreters.
 
 
 Fixed a problem where complex terms were not supported properly within 
 the 
 Switch() operator.
 
 Eliminated extraneous warning for compiler-emitted reserved names of the 
 form "_T_x".  (Used in Switch/Case operators.)
 
 Eliminated optimization messages for "_T_x" objects and small constants 
 within the DefinitionBlock operator.
 
 
 ----------------------------------------
 15 June 2004.  Summary of changes for version 20040615:
 
 1) ACPI CA Core Subsystem:
 
 Implemented support for Buffer and String objects (as per ACPI 2.0) for 
 the 
 following ASL operators:  LEqual, LGreater, LLess, LGreaterEqual, and 
 LLessEqual.
 
 All directory names in the entire source package are lower case, as they 
 were in earlier releases.
 
 Implemented "Disassemble" command in the AML debugger that will 
 disassemble 
 a single control method.
 
 Code and Data Size: Current and previous core subsystem library sizes are 
 shown below.  These are the code and data sizes for the acpica.lib 
 produced 
 by the Microsoft Visual C++ 6.0 compiler, and these values do not include 
 any ACPI driver or OSPM code.  The debug version of the code includes the 
 debug output trace mechanism and has a much larger code and data size.  
 Note 
 that these values will vary depending on the efficiency of the compiler 
 and 
 the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  77.7K Code,  11.5K Data,   89.2K Total
     Debug Version:     163.3K Code,  67.2K Data,  230.5K Total
 
   Current Release:
     Non-Debug Version:  77.8K Code,  11.5K Data,   89.3K Total
     Debug Version:     163.8K Code,  68.2K Data,  232.0K Total
 
 
 2) iASL Compiler/Disassembler:
 
 Implemented support for Buffer and String objects (as per ACPI 2.0) for 
 the 
 following ASL operators:  LEqual, LGreater, LLess, LGreaterEqual, and 
 LLessEqual.
 
 All directory names in the entire source package are lower case, as they 
 were in earlier releases.
 
 Fixed a fault when using the -g or -d<nofilename> options if the FADT was 
 not found.
 
 Fixed an issue with the Windows version of the compiler where later 
 versions 
 of Windows place the FADT in the registry under the name "FADT" and not 
 "FACP" as earlier versions did.  This applies when using the -g or -
 d<nofilename> options.  The compiler now looks for both strings as 
 necessary.
 
 Fixed a problem with compiler namepath optimization where a namepath 
 within 
 the Scope() operator could not be optimized if the namepath was a subpath 
 of 
 the current scope path.
 
 ----------------------------------------
 27 May 2004.  Summary of changes for version 20040527:
 
 1) ACPI CA Core Subsystem:
 
 Completed a new design and implementation for EBDA (Extended BIOS Data 
 Area) 
 support in the RSDP scan code.  The original code improperly scanned for 
 the 
 EBDA by simply scanning from memory location 0 to 0x400.  The correct 
 method 
 is to first obtain the EBDA pointer from within the BIOS data area, then 
 scan 1K of memory starting at the EBDA pointer.  There appear to be few 
 if 
 any machines that place the RSDP in the EBDA, however.
 
 Integrated a fix for a possible fault during evaluation of BufferField 
 arguments.  Obsolete code that was causing the problem was removed.
 
 Found and fixed a problem in the Field Support Code where data could be 
 corrupted on a bit field read that starts on an aligned boundary but does 
 not end on an aligned boundary.  Merged the read/write "datum length" 
 calculation code into a common procedure.
 
 Rolled in a couple of changes to the FreeBSD-specific header.
 
 
 Code and Data Size: Current and previous core subsystem library sizes are 
 shown below.  These are the code and data sizes for the acpica.lib 
 produced 
 by the Microsoft Visual C++ 6.0 compiler, and these values do not include 
 any ACPI driver or OSPM code.  The debug version of the code includes the 
 debug output trace mechanism and has a much larger code and data size.  
 Note 
 that these values will vary depending on the efficiency of the compiler 
 and 
 the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  77.6K Code,  11.5K Data,   89.1K Total
     Debug Version:     163.2K Code,  67.2K Data,  230.4K Total
   Current Release:
     Non-Debug Version:  77.7K Code,  11.5K Data,   89.2K Total
     Debug Version:     163.3K Code,  67.2K Data,  230.5K Total
 
 
 2) iASL Compiler/Disassembler:
 
 Fixed a generation warning produced by some overly-verbose compilers for 
 a 
 64-bit constant.
 
 ----------------------------------------
 14 May 2004.  Summary of changes for version 20040514:
 
 1) ACPI CA Core Subsystem:
 
 Fixed a problem where hardware GPE enable bits sometimes not set properly 
 during and after GPE method execution.  Result of 04/27 changes.
 
 Removed extra "clear all GPEs" when sleeping/waking.
 
 Removed AcpiHwEnableGpe and AcpiHwDisableGpe, replaced by the single 
 AcpiHwWriteGpeEnableReg. Changed a couple of calls to the functions above 
 to 
 the new AcpiEv* calls as appropriate.
 
 ACPI_OS_NAME was removed from the OS-specific headers.  The default name 
 is 
 now "Microsoft Windows NT" for maximum compatibility.  However this can 
 be 
 changed by modifying the acconfig.h file.
 
 Allow a single invocation of AcpiInstallNotifyHandler for a handler that 
 traps both types of notifies (System, Device).  Use ACPI_ALL_NOTIFY flag. 
 
 Run _INI methods on ThermalZone objects.  This is against the ACPI 
 specification, but there is apparently ASL code in the field that has 
 these 
 _INI methods, and apparently "other" AML interpreters execute them.
 
 Performed a full 16/32/64 bit lint that resulted in some small changes.
 
 Added a sleep simulation command to the AML debugger to test sleep code. 
 
 Code and Data Size: Current and previous core subsystem library sizes are 
 shown below.  These are the code and data sizes for the acpica.lib 
 produced 
 by the Microsoft Visual C++ 6.0 compiler, and these values do not include 
 any ACPI driver or OSPM code.  The debug version of the code includes the 
 debug output trace mechanism and has a much larger code and data size.  
 Note 
 that these values will vary depending on the efficiency of the compiler 
 and 
 the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  77.6K Code,  11.5K Data,   89.1K Total
     Debug Version:     162.9K Code,  67.0K Data,  229.9K Total
   Current Release:
     Non-Debug Version:  77.6K Code,  11.5K Data,   89.1K Total
     Debug Version:     163.2K Code,  67.2K Data,  230.4K Total
 
 ----------------------------------------
 27 April 2004.  Summary of changes for version 20040427:
 
 1) ACPI CA Core Subsystem:
 
 Completed a major overhaul of the GPE handling within ACPI CA.  There are 
 now three types of GPEs:  wake-only, runtime-only, and combination 
 wake/run.  
 The only GPEs allowed to be combination wake/run are for button-style 
 devices such as a control-method power button, control-method sleep 
 button, 
 or a notebook lid switch.  GPEs that have an _Lxx or _Exx method and are 
 not 
 referenced by any _PRW methods are marked for "runtime" and hardware 
 enabled.  Any GPE that is referenced by a _PRW method is marked for 
 "wake" 
 (and disabled at runtime).  However, at sleep time, only those GPEs that 
 have been specifically enabled for wake via the AcpiEnableGpe interface 
 will 
 actually be hardware enabled.
 
 A new external interface has been added, AcpiSetGpeType(), that is meant 
 to 
 be used by device drivers to force a GPE to a particular type.  It will 
 be 
 especially useful for the drivers for the button devices mentioned above.
 
 Completed restructuring of the ACPI CA initialization sequence so that 
 default operation region handlers are installed before GPEs are 
 initialized 
 and the _PRW methods are executed.  This will prevent errors when the 
 _PRW 
 methods attempt to access system memory or I/O space.
 
 GPE enable/disable no longer reads the GPE enable register.  We now keep 
 the 
 enable info for runtime and wake separate and in the GPE_EVENT_INFO.  We 
 thus no longer depend on the hardware to maintain these bits.
 
 Always clear the wake status and fixed/GPE status bits before sleep, even 
 for state S5.
 
 Improved the AML debugger output for displaying the GPE blocks and their 
 current status.
 
 Added new strings for the _OSI method, of the form "Windows 2001 SPx" 
 where 
 x = 0,1,2,3,4.
 
 Fixed a problem where the physical address was incorrectly calculated 
 when 
 the Load() operator was used to directly load from an Operation Region 
 (vs. 
 loading from a Field object.)  Also added check for minimum table length 
 for 
 this case.
 
 Fix for multiple mutex acquisition.  Restore original thread SyncLevel on 
 mutex release.
 
 Added ACPI_VALID_SXDS flag to the AcpiGetObjectInfo interface for 
 consistency with the other fields returned.
 
 Shrunk the ACPI_GPE_EVENT_INFO structure by 40%.  There is one such 
 structure for each GPE in the system, so the size of this structure is 
 important.
 
 CPU stack requirement reduction:  Cleaned up the method execution and 
 object 
 evaluation paths so that now a parameter structure is passed, instead of 
 copying the various method parameters over and over again.
 
 In evregion.c:  Correctly exit and reenter the interpreter region if and 
 only if dispatching an operation region request to a user-installed 
 handler.  
 Do not exit/reenter when dispatching to a default handler (e.g., default 
 system memory or I/O handlers)
 
 
 Notes for updating drivers for the new GPE support.  The following 
 changes 
 must be made to ACPI-related device drivers that are attached to one or 
 more 
 GPEs: (This information will be added to the ACPI CA Programmer 
 Reference.)
 
 1) AcpiInstallGpeHandler no longer automatically enables the GPE, you 
 must 
 explicitly call AcpiEnableGpe.
 2) There is a new interface called AcpiSetGpeType. This should be called 
 before enabling the GPE.  Also, this interface will automatically disable 
 the GPE if it is currently enabled.
 3) AcpiEnableGpe no longer supports a GPE type flag.
 
 Specific drivers that must be changed:
 1) EC driver:
     AcpiInstallGpeHandler (NULL, GpeNum, ACPI_GPE_EDGE_TRIGGERED, 
 AeGpeHandler, NULL);
     AcpiSetGpeType (NULL, GpeNum, ACPI_GPE_TYPE_RUNTIME);
     AcpiEnableGpe (NULL, GpeNum, ACPI_NOT_ISR);
 
 2) Button Drivers (Power, Lid, Sleep):
 Run _PRW method under parent device
 If _PRW exists: /* This is a control-method button */
     Extract GPE number and possibly GpeDevice
     AcpiSetGpeType (GpeDevice, GpeNum, ACPI_GPE_TYPE_WAKE_RUN);
     AcpiEnableGpe (GpeDevice, GpeNum, ACPI_NOT_ISR);
 
 For all other devices that have _PRWs, we automatically set the GPE type 
 to 
 ACPI_GPE_TYPE_WAKE, but the GPE is NOT automatically (wake) enabled.  
 This 
 must be done on a selective basis, usually requiring some kind of user 
 app 
 to allow the user to pick the wake devices.
 
 
 Code and Data Size: Current and previous core subsystem library sizes are 
 shown below.  These are the code and data sizes for the acpica.lib 
 produced 
 by the Microsoft Visual C++ 6.0 compiler, and these values do not include 
 any ACPI driver or OSPM code.  The debug version of the code includes the 
 debug output trace mechanism and has a much larger code and data size.  
 Note 
 that these values will vary depending on the efficiency of the compiler 
 and 
 the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  77.0K Code,  11.4K Data,   88.4K Total
     Debug Version:     161.0K Code,  66.3K Data,  227.3K Total
   Current Release:
 
     Non-Debug Version:  77.6K Code,  11.5K Data,   89.1K Total
     Debug Version:     162.9K Code,  67.0K Data,  229.9K Total
 
 
 
 ----------------------------------------
 02 April 2004.  Summary of changes for version 20040402:
 
 1) ACPI CA Core Subsystem:
 
 Fixed an interpreter problem where an indirect store through an ArgX 
 parameter was incorrectly applying the "implicit conversion rules" during 
 the store.  From the ACPI specification: "If the target is a method local 
 or 
 argument (LocalX or ArgX), no conversion is performed and the result is 
 stored directly to the target".  The new behavior is to disable implicit 
 conversion during ALL stores to an ArgX.
 
 Changed the behavior of the _PRW method scan to ignore any and all errors 
 returned by a given _PRW.  This prevents the scan from aborting from the 
 failure of any single _PRW.
 
 Moved the runtime configuration parameters from the global init procedure 
 to 
 static variables in acglobal.h.  This will allow the host to override the 
 default values easily.
 
 Code and Data Size: Current and previous core subsystem library sizes are 
 shown below.  These are the code and data sizes for the acpica.lib 
 produced 
 by the Microsoft Visual C++ 6.0 compiler, and these values do not include 
 any ACPI driver or OSPM code.  The debug version of the code includes the 
 debug output trace mechanism and has a much larger code and data size.  
 Note 
 that these values will vary depending on the efficiency of the compiler 
 and 
 the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  76.9K Code,  11.4K Data,   88.3K Total
     Debug Version:     160.8K Code,  66.1K Data,  226.9K Total
   Current Release:
     Non-Debug Version:  77.0K Code,  11.4K Data,   88.4K Total
     Debug Version:     161.0K Code,  66.3K Data,  227.3K Total
 
 
 2) iASL Compiler/Disassembler:
 
 iASL now fully disassembles SSDTs.  However, External() statements are 
 not 
 generated automatically for unresolved symbols at this time.  This is a 
 planned feature for future implementation.
 
 Fixed a scoping problem in the disassembler that occurs when the type of 
 the 
 target of a Scope() operator is overridden.  This problem caused an 
 incorrectly nested internal namespace to be constructed.
 
 Any warnings or errors that are emitted during disassembly are now 
 commented 
 out automatically so that the resulting file can be recompiled without 
 any 
 hand editing.
 
 ----------------------------------------
 26 March 2004.  Summary of changes for version 20040326:
 
 1) ACPI CA Core Subsystem:
 
 Implemented support for "wake" GPEs via interaction between GPEs and the 
 _PRW methods.  Every GPE that is pointed to by one or more _PRWs is 
 identified as a WAKE GPE and by default will no longer be enabled at 
 runtime.  Previously, we were blindly enabling all GPEs with a 
 corresponding 
 _Lxx or _Exx method - but most of these turn out to be WAKE GPEs anyway.  
 We 
 believe this has been the cause of thousands of "spurious" GPEs on some 
 systems.
 
 This new GPE behavior is can be reverted to the original behavior (enable 
 ALL GPEs at runtime) via a runtime flag.
 
 Fixed a problem where aliased control methods could not access objects 
 properly.  The proper scope within the namespace was not initialized 
 (transferred to the target of the aliased method) before executing the 
 target method.
 
 Fixed a potential race condition on internal object deletion on the 
 return 
 object in AcpiEvaluateObject. 
 
 Integrated a fix for resource descriptors where both _MEM and _MTP were 
 being extracted instead of just _MEM.  (i.e. bitmask was incorrectly too 
 wide, 0x0F instead of 0x03.)
 
 Added a special case for ACPI_ROOT_OBJECT in AcpiUtGetNodeName, 
 preventing 
 a 
 fault in some cases.
 
 Updated Notify() values for debug statements in evmisc.c
 
 Return proper status from AcpiUtMutexInitialize, not just simply AE_OK.
 
 Code and Data Size: Current and previous core subsystem library sizes are 
 shown below.  These are the code and data sizes for the acpica.lib 
 produced 
 by the Microsoft Visual C++ 6.0 compiler, and these values do not include 
 any ACPI driver or OSPM code.  The debug version of the code includes the 
 debug output trace mechanism and has a much larger code and data size.  
 Note 
 that these values will vary depending on the efficiency of the compiler 
 and 
 the compiler options used during generation.
 
   Previous Release:
 
     Non-Debug Version:  76.5K Code,  11.3K Data,   87.8K Total
     Debug Version:     160.3K Code,  66.0K Data,  226.3K Total
   Current Release:
     Non-Debug Version:  76.9K Code,  11.4K Data,   88.3K Total
     Debug Version:     160.8K Code,  66.1K Data,  226.9K Total
 
 ----------------------------------------
 11 March 2004.  Summary of changes for version 20040311:
 
 1) ACPI CA Core Subsystem:
 
 Fixed a problem where errors occurring during the parse phase of control 
 method execution did not abort cleanly.  For example, objects created and 
 installed in the namespace were not deleted.  This caused all subsequent 
 invocations of the method to return the AE_ALREADY_EXISTS exception.
 
 Implemented a mechanism to force a control method to "Serialized" 
 execution 
 if the method attempts to create namespace objects. (The root of the 
 AE_ALREADY_EXISTS problem.)
 
 Implemented support for the predefined _OSI "internal" control method.  
 Initial supported strings are "Linux", "Windows 2000", "Windows 2001", 
 and 
 "Windows 2001.1", and can be easily upgraded for new strings as 
 necessary.  
 This feature will allow "other" operating systems to execute the fully 
 tested, "Windows" code path through the ASL code
 
 Global Lock Support:  Now allows multiple acquires and releases with any 
 internal thread.  Removed concept of "owning thread" for this special 
 mutex.
 
 Fixed two functions that were inappropriately declaring large objects on 
 the 
 CPU stack:  PsParseLoop, NsEvaluateRelative.  Reduces the stack usage 
 during 
 method execution considerably.
 
 Fixed a problem in the ACPI 2.0 FACS descriptor (actbl2.h) where the 
 S4Bios_f field was incorrectly defined as UINT32 instead of UINT32_BIT.
 
 Fixed a problem where AcpiEvGpeDetect would fault if there were no GPEs 
 defined on the machine.
 
 Implemented two runtime options:  One to force all control method 
 execution 
 to "Serialized" to mimic Windows behavior, another to disable _OSI 
 support 
 if it causes problems on a given machine.
 
 Code and Data Size: Current and previous core subsystem library sizes are 
 shown below.  These are the code and data sizes for the acpica.lib 
 produced 
 by the Microsoft Visual C++ 6.0 compiler, and these values do not include 
 any ACPI driver or OSPM code.  The debug version of the code includes the 
 debug output trace mechanism and has a much larger code and data size.  
 Note 
 that these values will vary depending on the efficiency of the compiler 
 and 
 the compiler options used during generation.
 
   Previous Release:
     Non-Debug Version:  74.8K Code,  10.1K Data,   84.9K Total
     Debug Version:     158.7K Code,  65.1K Data,  223.8K Total
   Current Release:
     Non-Debug Version:  76.5K Code,  11.3K Data,   87.8K Total
     Debug Version:     160.3K Code,  66.0K Data,  226.3K Total
 
 2) iASL Compiler/Disassembler:
 
 Fixed an array size problem for FreeBSD that would cause the compiler to 
 fault.
 
 ----------------------------------------
 20 February 2004.  Summary of changes for version 20040220:
 
 
 1) ACPI CA Core Subsystem:
 
 Implemented execution of _SxD methods for Device objects in the 
 GetObjectInfo interface.
 
 Fixed calls to _SST method to pass the correct arguments.
 
 Added a call to _SST on wake to restore to "working" state.
 
 Check for End-Of-Buffer failure case in the WalkResources interface.
 
 Integrated fix for 64-bit alignment issue in acglobal.h by moving two 
 structures to the beginning of the file.
 
 After wake, clear GPE status register(s) before enabling GPEs.
 
 After wake, clear/enable power button.  (Perhaps we should clear/enable 
 all 
 fixed events upon wake.)
 
 Fixed a couple of possible memory leaks in the Namespace manager.
 
 Integrated latest acnetbsd.h file.
 
 ----------------------------------------
 11 February 2004.  Summary of changes for version 20040211:
 
 
 1) ACPI CA Core Subsystem:
 
 Completed investigation and implementation of the call-by-reference 
 mechanism for control method arguments.
 
 Fixed a problem where a store of an object into an indexed package could 
 fail if the store occurs within a different method than the method that 
 created the package.
 
 Fixed a problem where the ToDecimal operator could return incorrect 
 results.
 
 Fixed a problem where the CopyObject operator could fail on some of the 
 more 
 obscure objects (e.g., Reference objects.)
 
 Improved the output of the Debug object to display buffer, package, and 
 index objects.
 
 Fixed a problem where constructs of the form "RefOf (ArgX)" did not 
 return 
 the expected result.
 
 Added permanent ACPI_REPORT_ERROR macros for all instances of the 
 ACPI_AML_INTERNAL exception.
 
 Integrated latest version of acfreebsd.h
 
 ----------------------------------------
 16 January 2004.  Summary of changes for version 20040116:
 
 The purpose of this release is primarily to update the copyright years in 
 each module, thus causing a huge number of diffs.  There are a few small 
 functional changes, however.
 
 1) ACPI CA Core Subsystem:
 
 Improved error messages when there is a problem finding one or more of 
 the 
 required base ACPI tables
 
 Reintroduced the definition of APIC_HEADER in actbl.h
 
 Changed definition of MADT_ADDRESS_OVERRIDE to 64 bits (actbl.h)
 
 Removed extraneous reference to NewObj in dsmthdat.c
 
 2) iASL compiler
 
 Fixed a problem introduced in December that disabled the correct 
 disassembly 
 of Resource Templates
 
 
 ----------------------------------------
 03 December 2003.  Summary of changes for version 20031203:
 
 1) ACPI CA Core Subsystem:
 
 Changed the initialization of Operation Regions during subsystem
 init to perform two entire walks of the ACPI namespace; The first
 to initialize the regions themselves, the second to execute the
 _REG methods.  This fixed some interdependencies across _REG
 methods found on some machines.
 
 Fixed a problem where a Store(Local0, Local1) could simply update
 the object reference count, and not create a new copy of the
 object if the Local1 is uninitialized.
 
 Implemented support for the _SST reserved method during sleep
 transitions.
 
 Implemented support to clear the SLP_TYP and SLP_EN bits when
 waking up, this is apparently required by some machines.
 
 When sleeping, clear the wake status only if SleepState is not S5.
 
 Fixed a problem in AcpiRsExtendedIrqResource() where an incorrect
 pointer arithmetic advanced a string pointer too far.
 
 Fixed a problem in AcpiTbGetTablePtr() where a garbage pointer
 could be returned if the requested table has not been loaded.
 
 Within the support for IRQ resources, restructured the handling of
 the active and edge/level bits.
 
 Fixed a few problems in AcpiPsxExecute() where memory could be
 leaked under certain error conditions.
 
 Improved error messages for the cases where the ACPI mode could
 not be entered.
 
 Code and Data Size: Current and previous core subsystem library
 sizes are shown below.  These are the code and data sizes for the
 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
 these values do not include any ACPI driver or OSPM code.  The
 debug version of the code includes the debug output trace
 mechanism and has a much larger code and data size.  Note that
 these values will vary depending on the efficiency of the compiler
 and the compiler options used during generation.
 
   Previous Release (20031029):
     Non-Debug Version:  74.4K Code,  10.1K Data,   84.5K Total
     Debug Version:     158.3K Code,  65.0K Data,  223.3K Total
   Current Release:
     Non-Debug Version:  74.8K Code,  10.1K Data,   84.9K Total
     Debug Version:     158.7K Code,  65.1K Data,  223.8K Total
 
 2) iASL Compiler/Disassembler:
 
 Implemented a fix for the iASL disassembler where a bad index was
 generated.  This was most noticeable on 64-bit platforms
 
 
 ----------------------------------------
 29 October 2003.  Summary of changes for version 20031029:
 
 1) ACPI CA Core Subsystem:
 
 
 Fixed a problem where a level-triggered GPE with an associated
 _Lxx control method was incorrectly cleared twice.
 
 Fixed a problem with the Field support code where an access can
 occur beyond the end-of-region if the field is non-aligned but
 extends to the very end of the parent region (resulted in an
 AE_AML_REGION_LIMIT exception.)
 
 Fixed a problem with ACPI Fixed Events where an RT Clock handler
 would not get invoked on an RTC event.  The RTC event bitmasks for
 the PM1 registers were not being initialized properly.
 
 Implemented support for executing _STA and _INI methods for
 Processor objects.  Although this is currently not part of the
 ACPI specification, there is existing ASL code that depends on the
 init-time execution of these methods.
 
 Implemented and deployed a GetDescriptorName function to decode
 the various types of internal descriptors.  Guards against null
 descriptors during debug output also.
 
 Implemented and deployed a GetNodeName function to extract the 4-
 character namespace node name.  This function simplifies the debug
 and error output, as well as guarding against null pointers during
 output.
 
 Implemented and deployed the ACPI_FORMAT_UINT64 helper macro to
 simplify the debug and error output of 64-bit integers.  This
 macro replaces the HIDWORD and LODWORD macros for dumping these
 integers.
 
 Updated the implementation of the Stall() operator to only call
 AcpiOsStall(), and also return an error if the operand is larger
 than 255.  This preserves the required behavior of not
 relinquishing the processor, as would happen if AcpiOsSleep() was
 called for "long stalls".
 
 Constructs of the form "Store(LocalX,LocalX)" where LocalX is not
 initialized are now treated as NOOPs.
 
 Cleaned up a handful of warnings during 64-bit generation.
 
 Fixed a reported error where and incorrect GPE number was passed
 to the GPE dispatch handler.  This value is only used for error
 output, however.  Used this opportunity to clean up and streamline
 the GPE dispatch code.
 
 Code and Data Size: Current and previous core subsystem library
 sizes are shown below.  These are the code and data sizes for the
 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
 these values do not include any ACPI driver or OSPM code.  The
 
 debug version of the code includes the debug output trace
 mechanism and has a much larger code and data size.  Note that
 these values will vary depending on the efficiency of the compiler
 and the compiler options used during generation.
 
   Previous Release (20031002):
     Non-Debug Version:  74.1K Code,   9.7K Data,   83.8K Total
     Debug Version:     157.9K Code,  64.8K Data,  222.7K Total
   Current Release:
     Non-Debug Version:  74.4K Code,  10.1K Data,   84.5K Total
     Debug Version:     158.3K Code,  65.0K Data,  223.3K Total
 
 
 2) iASL Compiler/Disassembler:
 
 Updated the iASL compiler to return an error if the operand to the
 Stall() operator is larger than 255.
 
 
 ----------------------------------------
 02 October 2003.  Summary of changes for version 20031002:
 
 
 1) ACPI CA Core Subsystem:
 
 Fixed a problem with Index Fields where the index was not
 incremented for fields that require multiple writes to the
 index/data registers (Fields that are wider than the data
 register.)
 
 Fixed a problem with all Field objects where a write could go
 beyond the end-of-field if the field was larger than the access
 granularity and therefore required multiple writes to complete the
 request.  An extra write beyond the end of the field could happen
 inadvertently.
 
 Fixed a problem with Index Fields where a BUFFER_OVERFLOW error
 would incorrectly be returned if the width of the Data Register
 was larger than the specified field access width.
 
 Completed fixes for LoadTable() and Unload() and verified their
 operation.  Implemented full support for the "DdbHandle" object
 throughout the ACPI CA subsystem.
 
 Implemented full support for the MADT and ECDT tables in the ACPI
 CA header files.  Even though these tables are not directly
 consumed by ACPI CA, the header definitions are useful for ACPI
 device drivers.
 
 Integrated resource descriptor fixes posted to the Linux ACPI
 list.  This included checks for minimum descriptor length, and
 support for trailing NULL strings within descriptors that have
 optional string elements.
 
 Code and Data Size: Current and previous core subsystem library
 sizes are shown below.  These are the code and data sizes for the
 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
 these values do not include any ACPI driver or OSPM code.  The
 debug version of the code includes the debug output trace
 mechanism and has a much larger code and data size.  Note that
 these values will vary depending on the efficiency of the compiler
 and the compiler options used during generation.
 
   Previous Release (20030918):
     Non-Debug Version:  73.9K Code,   9.7K Data,   83.6K Total
     Debug Version:     157.3K Code,  64.5K Data,  221.8K Total
   Current Release:
     Non-Debug Version:  74.1K Code,   9.7K Data,   83.8K Total
     Debug Version:     157.9K Code,  64.8K Data,  222.7K Total
 
 
 2) iASL Compiler:
 
 Implemented detection of non-ASCII characters within the input
 source ASL file.  This catches attempts to compile binary (AML)
 files early in the compile, with an informative error message.
 
 Fixed a problem where the disassembler would fault if the output
 filename could not be generated or if the output file could not be
 opened.
 
 ----------------------------------------
 18 September 2003.  Summary of changes for version 20030918:
 
 
 1) ACPI CA Core Subsystem:
 
 Found and fixed a longstanding problem with the late execution of
 the various deferred AML opcodes (such as Operation Regions,
 Buffer Fields, Buffers, and Packages).  If the name string
 specified for the name of the new object placed the object in a
 scope other than the current scope, the initialization/execution
 of the opcode failed.  The solution to this problem was to
 implement a mechanism where the late execution of such opcodes
 does not attempt to lookup/create the name a second time in an
 incorrect scope.  This fixes the "region size computed
 incorrectly" problem.
 
 Fixed a call to AcpiHwRegisterWrite in hwregs.c that was causing a
 Global Lock AE_BAD_PARAMETER error.
 
 Fixed several 64-bit issues with prototypes, casting and data
 types.
 
 Removed duplicate prototype from acdisasm.h
 
 Fixed an issue involving EC Operation Region Detach (Shaohua Li)
 
 Code and Data Size: Current and previous core subsystem library
 sizes are shown below.  These are the code and data sizes for the
 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
 these values do not include any ACPI driver or OSPM code.  The
 debug version of the code includes the debug output trace
 mechanism and has a much larger code and data size.  Note that
 these values will vary depending on the efficiency of the compiler
 and the compiler options used during generation.
 
   Previous Release:
 
     Non-Debug Version:  73.7K Code,   9.7K Data,   83.4K Total
     Debug Version:     156.9K Code,  64.2K Data,  221.1K Total
   Current Release:
     Non-Debug Version:  73.9K Code,   9.7K Data,   83.6K Total
     Debug Version:     157.3K Code,  64.5K Data,  221.8K Total
 
 
 2) Linux:
 
 Fixed the AcpiOsSleep implementation in osunixxf.c to pass the
 correct sleep time in seconds.
 
 ----------------------------------------
 14 July 2003.  Summary of changes for version 20030619:
 
 1) ACPI CA Core Subsystem:
 
 Parse SSDTs in order discovered, as opposed to reverse order
 (Hrvoje Habjanic)
 
 Fixes from FreeBSD and NetBSD. (Frank van der Linden, Thomas
 Klausner,
    Nate Lawson)
 
 
 2) Linux:
 
 Dynamically allocate SDT list (suggested by Andi Kleen)
 
 proc function return value cleanups (Andi Kleen)
 
 Correctly handle NMI watchdog during long stalls (Andrew Morton)
 
 Make it so acpismp=force works (reported by Andrew Morton)
 
 
 ----------------------------------------
 19 June 2003.  Summary of changes for version 20030619:
 
 1) ACPI CA Core Subsystem:
 
 Fix To/FromBCD, eliminating the need for an arch-specific #define.
 
 Do not acquire a semaphore in the S5 shutdown path.
 
 Fix ex_digits_needed for 0. (Takayoshi Kochi)
 
 Fix sleep/stall code reversal. (Andi Kleen)
 
 Revert a change having to do with control method calling
 semantics.
 
 2) Linux:
 
 acpiphp update (Takayoshi Kochi)
 
 Export acpi_disabled for sonypi (Stelian Pop)
 
 Mention acpismp=force in config help
 
 Re-add acpitable.c and acpismp=force. This improves backwards
 
 compatibility and also cleans up the code to a significant degree.
 
 Add ASUS Value-add driver (Karol Kozimor and Julien Lerouge)
 
 ----------------------------------------
 22 May 2003.  Summary of changes for version 20030522:
 
 1) ACPI CA Core Subsystem:
 
 Found and fixed a reported problem where an AE_NOT_FOUND error
 occurred occasionally during _BST evaluation.  This turned out to
 be an Owner ID allocation issue where a called method did not get
 a new ID assigned to it.  Eventually, (after 64k calls), the Owner
 ID UINT16 would wraparound so that the ID would be the same as the
 caller's and the called method would delete the caller's
 namespace.
 
 Implemented extended error reporting for control methods that are
 aborted due to a run-time exception.  Output includes the exact
 AML instruction that caused the method abort, a dump of the method
 locals and arguments at the time of the abort, and a trace of all
 nested control method calls.
 
 Modified the interpreter to allow the creation of buffers of zero
 length from the AML code. Implemented new code to ensure that no
 attempt is made to actually allocate a memory buffer (of length
 zero) - instead, a simple buffer object with a NULL buffer pointer
 and length zero is created.  A warning is no longer issued when
 the AML attempts to create a zero-length buffer.
 
 Implemented a workaround for the "leading asterisk issue" in
 _HIDs, _UIDs, and _CIDs in the AML interpreter.  One leading
 asterisk is automatically removed if present in any HID, UID, or
 CID strings.  The iASL compiler will still flag this asterisk as
 an error, however.
 
 Implemented full support for _CID methods that return a package of
 multiple CIDs (Compatible IDs).  The AcpiGetObjectInfo() interface
 now additionally returns a device _CID list if present.  This
 required a change to the external interface in order to pass an
 ACPI_BUFFER object as a parameter since the _CID list is of
 variable length.
 
 Fixed a problem with the new AE_SAME_HANDLER exception where
 handler initialization code did not know about this exception.
 
 Code and Data Size: Current and previous core subsystem library
 sizes are shown below.  These are the code and data sizes for the
 acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
 these values do not include any ACPI driver or OSPM code.  The
 debug version of the code includes the debug output trace
 mechanism and has a much larger code and data size.  Note that
 these values will vary depending on the efficiency of the compiler
 and the compiler options used during generation.
 
   Previous Release (20030509):
     Non-Debug Version:  73.4K Code,   9.7K Data,   83.1K Total
     Debug Version:     156.1K Code,  63.9K Data,  220.0K Total
   Current Release:
     Non-Debug Version:  73.7K Code,   9.7K Data,   83.4K Total
     Debug Version:     156.9K Code,  64.2K Data,  221.1K Total
 
 
 2) Linux:
 
 Fixed a bug in which we would reinitialize the ACPI interrupt
 after it was already working, thus disabling all ACPI and the IRQs
 for any other device sharing the interrupt. (Thanks to Stian
 Jordet)
 
 Toshiba driver update (John Belmonte)
 
 Return only 0 or 1 for our interrupt handler status (Andrew
 Morton)
 
 
 3) iASL Compiler:
 
 Fixed a reported problem where multiple (nested) ElseIf()
 statements were not handled correctly by the compiler, resulting
 in incorrect warnings and incorrect AML code.  This was a problem
 in both the ASL parser and the code generator.
 
 
 4) Documentation:
 
 Added changes to existing interfaces, new exception codes, and new
 text concerning reference count object management versus garbage
 collection.
 
 ----------------------------------------
 09 May 2003.  Summary of changes for version 20030509.
 
 
 1) ACPI CA Core Subsystem:
 
 Changed the subsystem initialization sequence to hold off
 installation of address space handlers until the hardware has been
 initialized and the system has entered ACPI mode.  This is because
 the installation of space handlers can cause _REG methods to be
 run.  Previously, the _REG methods could potentially be run before
 ACPI mode was enabled.
 
 Fixed some memory leak issues related to address space handler and
 notify handler installation.  There were some problems with the
 reference count mechanism caused by the fact that the handler
 objects are shared across several namespace objects.
 
 Fixed a reported problem where reference counts within the
 namespace were not properly updated when named objects created by
 method execution were deleted.
 
 Fixed a reported problem where multiple SSDTs caused a deletion
 issue during subsystem termination.  Restructured the table data
 structures to simplify the linked lists and the related code.
 
 Fixed a problem where the table ID associated with secondary
 tables (SSDTs) was not being propagated into the namespace objects
 created by those tables.  This would only present a problem for
 tables that are unloaded at run-time, however.
 
 Updated AcpiOsReadable and AcpiOsWritable to use the ACPI_SIZE
 type as the length parameter (instead of UINT32).
 
 Solved a long-standing problem where an ALREADY_EXISTS error
 appears on various systems.  This problem could happen when there
 are multiple PCI_Config operation regions under a single PCI root
 bus.  This doesn't happen very frequently, but there are some
 systems that do this in the ASL.
 
 Fixed a reported problem where the internal DeleteNode function
 was incorrectly handling the case where a namespace node was the
 first in the parent's child list, and had additional peers (not
 the only child, but first in the list of children.)
 
 Code and Data Size: Current core subsystem library sizes are shown
 below.  These are the code and data sizes for the acpica.lib
 produced by the Microsoft Visual C++ 6.0 compiler, and these
 values do not include any ACPI driver or OSPM code.  The debug
 version of the code includes the debug output trace mechanism and
 has a much larger code and data size.  Note that these values will
 vary depending on the efficiency of the compiler and the compiler
 options used during generation.
 
   Previous Release
     Non-Debug Version:  73.7K Code,   9.5K Data,   83.2K Total
     Debug Version:     156.1K Code,  63.6K Data,  219.7K Total
   Current Release:
     Non-Debug Version:  73.4K Code,   9.7K Data,   83.1K Total
     Debug Version:     156.1K Code,  63.9K Data,  220.0K Total
 
 
 2) Linux:
 
 Allow ":" in OS override string (Ducrot Bruno)
 
 Kobject fix (Greg KH)
 
 
 3 iASL Compiler/Disassembler:
 
 Fixed a problem in the generation of the C source code files (AML
 is emitted in C source statements for BIOS inclusion) where the
 Ascii dump that appears within a C comment at the end of each line
 could cause a compile time error if the AML sequence happens to
 have an open comment or close comment sequence embedded.
 
 
 ----------------------------------------
 24 April 2003.  Summary of changes for version 20030424.
 
 
 1) ACPI CA Core Subsystem:
 
 Support for big-endian systems has been implemented.  Most of the
 support has been invisibly added behind big-endian versions of the
 ACPI_MOVE_* macros.
 
 Fixed a problem in AcpiHwDisableGpeBlock() and
 AcpiHwClearGpeBlock() where an incorrect offset was passed to the
 low level hardware write routine.  The offset parameter was
 actually eliminated from the low level read/write routines because
 they had become obsolete.
 
 Fixed a problem where a handler object was deleted twice during
 the removal of a fixed event handler.
 
 
 2) Linux:
 
 A fix for SMP systems with link devices was contributed by
 
 Compaq's Dan Zink.
 
 (2.5) Return whether we handled the interrupt in our IRQ handler.
 (Linux ISRs no longer return void, so we can propagate the handler
 return value from the ACPI CA core back to the OS.)
 
 
 
 3) Documentation:
 
 The ACPI CA Programmer Reference has been updated to reflect new
 interfaces and changes to existing interfaces.
 
 ----------------------------------------
 28 March 2003.  Summary of changes for version 20030328.
 
 1) ACPI CA Core Subsystem:
 
 The GPE Block Device support has been completed.  New interfaces
 are AcpiInstallGpeBlock and AcpiRemoveGpeBlock.  The Event
 interfaces (enable, disable, clear, getstatus) have been split
 into separate interfaces for Fixed Events and General Purpose
 Events (GPEs) in order to support GPE Block Devices properly.
 
 Fixed a problem where the error message "Failed to acquire
 semaphore" would appear during operations on the embedded
 controller (EC).
 
 Code and Data Size: Current core subsystem library sizes are shown
 below.  These are the code and data sizes for the acpica.lib
 produced by the Microsoft Visual C++ 6.0 compiler, and these
 values do not include any ACPI driver or OSPM code.  The debug
 version of the code includes the debug output trace mechanism and
 has a much larger code and data size.  Note that these values will
 vary depending on the efficiency of the compiler and the compiler
 options used during generation.
 
   Previous Release
     Non-Debug Version:  72.3K Code,   9.5K Data,   81.8K Total
     Debug Version:     154.0K Code,  63.4K Data,  217.4K Total
   Current Release:
     Non-Debug Version:  73.7K Code,   9.5K Data,   83.2K Total
     Debug Version:     156.1K Code,  63.6K Data,  219.7K Total
 
 
 ----------------------------------------
 28 February 2003.  Summary of changes for version 20030228.
 
 
 1) ACPI CA Core Subsystem:
 
 The GPE handling and dispatch code has been completely overhauled
 in preparation for support of GPE Block Devices (ID ACPI0006).
 This affects internal data structures and code only; there should
 be no differences visible externally.  One new file has been
 added, evgpeblk.c
 
 The FADT fields GPE0_BLK_LEN and GPE1_BLK_LEN are now the only
 fields that are used to determine the GPE block lengths.  The
 REGISTER_BIT_WIDTH field of the X_GPEx_BLK extended address
 structures are ignored.  This is per the ACPI specification but it
 isn't very clear.  The full 256 Block 0/1 GPEs are now supported
 (the use of REGISTER_BIT_WIDTH limited the number of GPEs to 128).
 
 In the SCI interrupt handler, removed the read of the PM1_CONTROL
 register to look at the SCI_EN bit.  On some machines, this read
 causes an SMI event and greatly slows down SCI events.  (This may
 in fact be the cause of slow battery status response on some
 systems.)
 
 Fixed a problem where a store of a NULL string to a package object
 could cause the premature deletion of the object.  This was seen
 during execution of the battery _BIF method on some systems,
 resulting in no battery data being returned.
 
 Added AcpiWalkResources interface to simplify parsing of resource
 lists.
 
 Code and Data Size: Current core subsystem library sizes are shown
 below.  These are the code and data sizes for the acpica.lib
 produced by the Microsoft Visual C++ 6.0 compiler, and these
 values do not include any ACPI driver or OSPM code.  The debug
 version of the code includes the debug output trace mechanism and
 has a much larger code and data size.  Note that these values will
 vary depending on the efficiency of the compiler and the compiler
 options used during generation.
 
   Previous Release
     Non-Debug Version:  72.0K Code,   9.5K Data,   81.5K Total
     Debug Version:     153.0K Code,  62.9K Data,  215.9K Total
   Current Release:
     Non-Debug Version:  72.3K Code,   9.5K Data,   81.8K Total
     Debug Version:     154.0K Code,  63.4K Data,  217.4K Total
 
 
 2) Linux
 
 S3 fixes (Ole Rohne)
 
 Update ACPI PHP driver with to use new acpi_walk_resource API
 (Bjorn Helgaas)
 
 Add S4BIOS support (Pavel Machek)
 
 Map in entire table before performing checksum (John Stultz)
 
 Expand the mem= cmdline to allow the specification of reserved and
 ACPI DATA blocks (Pavel Machek)
 
 Never use ACPI on VISWS
 
 Fix derive_pci_id (Ducrot Bruno, Alvaro Lopez)
 
 Revert a change that allowed P_BLK lengths to be 4 or 5. This is
 causing us to think that some systems support C2 when they really
 don't.
 
 Do not count processor objects for non-present CPUs (Thanks to
 Dominik Brodowski)
 
 
 3) iASL Compiler:
 
 Fixed a problem where ASL include files could not be found and
 opened.
 
 Added support for the _PDC reserved name.
 
 
 ----------------------------------------
 22 January 2003.  Summary of changes for version 20030122.
 
 
 1) ACPI CA Core Subsystem:
 
 Added a check for constructs of the form:  Store (Local0, Local0)
 where Local0 is not initialized.  Apparently, some BIOS
 programmers believe that this is a NOOP.  Since this store doesn't
 do anything anyway, the new prototype behavior will ignore this
 error.  This is a case where we can relax the strict checking in
 the interpreter in the name of compatibility.
 
 
 2) Linux
 
 The AcpiSrc Source Conversion Utility has been released with the
 Linux package for the first time.  This is the utility that is
 used to convert the ACPI CA base source code to the Linux version.
 
 (Both) Handle P_BLK lengths shorter than 6 more gracefully
 
 (Both) Move more headers to include/acpi, and delete an unused
 header.
 
 (Both) Move drivers/acpi/include directory to include/acpi
 
 (Both) Boot functions don't use cmdline, so don't pass it around
 
 (Both) Remove include of unused header (Adrian Bunk)
 
 (Both) acpiphp.h includes both linux/acpi.h and acpi_bus.h. Since
 the
 former now also includes the latter, acpiphp.h only needs the one,
 now.
 
 (2.5) Make it possible to select method of bios restoring after S3
 resume. [=> no more ugly ifdefs] (Pavel Machek)
 
 (2.5) Make proc write interfaces work (Pavel Machek)
 
 (2.5) Properly init/clean up in cpufreq/acpi (Dominik Brodowski)
 
 (2.5) Break out ACPI Perf code into its own module, under cpufreq
 (Dominik Brodowski)
 
 (2.4) S4BIOS support (Ducrot Bruno)
 
 (2.4) Fix acpiphp_glue.c for latest ACPI struct changes (Sergio
 Visinoni)
 
 
 3) iASL Compiler:
 
 Added support to disassemble SSDT and PSDTs.
 
 Implemented support to obtain SSDTs from the Windows registry if
 available.
 
 
 ----------------------------------------
 09 January 2003.  Summary of changes for version 20030109.
 
 1) ACPI CA Core Subsystem:
 
 Changed the behavior of the internal Buffer-to-String conversion
 function.  The current ACPI specification states that the contents
 of the buffer are "converted to a string of two-character
 hexadecimal numbers, each separated by a space".  Unfortunately,
 this definition is not backwards compatible with existing ACPI 1.0
 implementations (although the behavior was not defined in the ACPI
 1.0 specification).  The new behavior simply copies data from the
 buffer to the string until a null character is found or the end of
 the buffer is reached.  The new String object is always null
 terminated.  This problem was seen during the generation of _BIF
 battery data where incorrect strings were returned for battery
 type, etc.  This will also require an errata to the ACPI
 specification.
 
 Renamed all instances of NATIVE_UINT and NATIVE_INT to
 ACPI_NATIVE_UINT and ACPI_NATIVE_INT, respectively.
 
 Copyright in all module headers (both Linux and non-Linux) has be
 updated to 2003.
 
 Code and Data Size: Current core subsystem library sizes are shown
 below.  These are the code and data sizes for the acpica.lib
 produced by the Microsoft Visual C++ 6.0 compiler, and these
 values do not include any ACPI driver or OSPM code.  The debug
 version of the code includes the debug output trace mechanism and
 has a much larger code and data size.  Note that these values will
 vary depending on the efficiency of the compiler and the compiler
 options used during generation.
 
   Previous Release
     Non-Debug Version:  72.0K Code,   9.5K Data,   81.5K Total
     Debug Version:     153.0K Code,  62.9K Data,  215.9K Total
   Current Release:
     Non-Debug Version:  72.0K Code,   9.5K Data,   81.5K Total
     Debug Version:     153.0K Code,  62.9K Data,  215.9K Total
 
 
 2) Linux
 
 Fixed an oops on module insertion/removal (Matthew Tippett)
 
 (2.4) Fix to handle dynamic size of mp_irqs (Joerg Prante)
 
 (2.5) Replace pr_debug (Randy Dunlap)
 
 (2.5) Remove usage of CPUFREQ_ALL_CPUS (Dominik Brodowski)
 
 (Both) Eliminate spawning of thread from timer callback, in favor
 of schedule_work()
 
 (Both) Show Lid status in /proc (Zdenek OGAR Skalak)
 
 (Both) Added define for Fixed Function HW region (Matthew Wilcox)
 
 (Both) Add missing statics to button.c (Pavel Machek)
 
 Several changes have been made to the source code translation
 utility that generates the Linux Code in order to make the code
 more "Linux-like":
 
 All typedefs on structs and unions have been removed in keeping
 with the Linux coding style.
 
 Removed the non-Linux SourceSafe module revision number from each
 module header.
 
 Completed major overhaul of symbols to be lowercase for linux.
 Doubled the number of symbols that are lowercase.
 
 Fixed a problem where identifiers within procedure headers and
 within quotes were not fully lower cased (they were left with a
 starting capital.)
 
 Some C macros whose only purpose is to allow the generation of 16-
 bit code are now completely removed in the Linux code, increasing
 readability and maintainability.
 
 ----------------------------------------
 
 12 December 2002.  Summary of changes for version 20021212.
 
 
 1) ACPI CA Core Subsystem:
 
 Fixed a problem where the creation of a zero-length AML Buffer
 would cause a fault.
 
 Fixed a problem where a Buffer object that pointed to a static AML
 buffer (in an ACPI table) could inadvertently be deleted, causing
 memory corruption.
 
 Fixed a problem where a user buffer (passed in to the external
 ACPI CA interfaces) could be overwritten if the buffer was too
 small to complete the operation, causing memory corruption.
 
 Fixed a problem in the Buffer-to-String conversion code where a
 string of length one was always returned, regardless of the size
 of the input Buffer object.
 
 Removed the NATIVE_CHAR data type across the entire source due to
 lack of need and lack of consistent use.
 
 Code and Data Size: Current core subsystem library sizes are shown
 below.  These are the code and data sizes for the acpica.lib
 produced by the Microsoft Visual C++ 6.0 compiler, and these
 values do not include any ACPI driver or OSPM code.  The debug
 version of the code includes the debug output trace mechanism and
 has a much larger code and data size.  Note that these values will
 vary depending on the efficiency of the compiler and the compiler
 options used during generation.
 
   Previous Release
     Non-Debug Version:  72.1K Code,   9.5K Data,   81.6K Total
     Debug Version:     152.7K Code,  62.7K Data,  215.4K Total
   Current Release:
     Non-Debug Version:  72.0K Code,   9.5K Data,   81.5K Total
     Debug Version:     153.0K Code,  62.9K Data,  215.9K Total
 
 
 ----------------------------------------
 05 December 2002.  Summary of changes for version 20021205.
 
 1) ACPI CA Core Subsystem:
 
 Fixed a problem where a store to a String or Buffer object could
 cause corruption of the DSDT if the object type being stored was
 the same as the target object type and the length of the object
 being stored was equal to or smaller than the original (existing)
 target object.  This was seen to cause corruption of battery _BIF
 buffers if the _BIF method modified the buffer on the fly.
 
 Fixed a problem where an internal error was generated if a control
 method invocation was used in an OperationRegion, Buffer, or
 Package declaration.  This was caused by the deferred parsing of
 the control method and thus the deferred creation of the internal
 method object.  The solution to this problem was to create the
 internal method object at the moment the method is encountered in
 the first pass - so that subsequent references to the method will
 able to obtain the required parameter count and thus properly
 parse the method invocation.  This problem presented itself as an
 AE_AML_INTERNAL during the pass 1 parse phase during table load.
 
 Fixed a problem where the internal String object copy routine did
 not always allocate sufficient memory for the target String object
 and caused memory corruption.  This problem was seen to cause
 "Allocation already present in list!" errors as memory allocation
 became corrupted.
 
 Implemented a new function for the evaluation of namespace objects
 that allows the specification of the allowable return object
 types.  This simplifies a lot of code that checks for a return
 object of one or more specific objects returned from the
 evaluation (such as _STA, etc.)  This may become and external
 function if it would be useful to ACPI-related drivers.
 
 Completed another round of prefixing #defines with "ACPI_" for
 clarity.
 
 Completed additional code restructuring to allow more modular
 linking for iASL compiler and AcpiExec.  Several files were split
 creating new files.  New files:  nsparse.c dsinit.c evgpe.c
 
 Implemented an abort mechanism to terminate an executing control
 method via the AML debugger.  This feature is useful for debugging
 control methods that depend (wait) for specific hardware
 responses.
 
 Code and Data Size: Current core subsystem library sizes are shown
 below.  These are the code and data sizes for the acpica.lib
 produced by the Microsoft Visual C++ 6.0 compiler, and these
 values do not include any ACPI driver or OSPM code.  The debug
 version of the code includes the debug output trace mechanism and
 has a much larger code and data size.  Note that these values will
 vary depending on the efficiency of the compiler and the compiler
 options used during generation.
 
   Previous Release
     Non-Debug Version:  71.4K Code,   9.0K Data,   80.4K Total
     Debug Version:     152.9K Code,  63.3K Data,  216.2K Total
   Current Release:
     Non-Debug Version:  72.1K Code,   9.5K Data,   81.6K Total
     Debug Version:     152.7K Code,  62.7K Data,  215.4K Total
 
 
 2) iASL Compiler/Disassembler
 
 Fixed a compiler code generation problem for "Interrupt" Resource
 Descriptors.  If specified in the ASL, the optional "Resource
 Source Index" and "Resource Source" fields were not inserted into
 the correct location within the AML resource descriptor, creating
 an invalid descriptor.
 
 Fixed a disassembler problem for "Interrupt" resource descriptors.
 The optional "Resource Source Index" and "Resource Source" fields
 were ignored.
 
 
 ----------------------------------------
 22 November 2002.  Summary of changes for version 20021122.
 
 
 1) ACPI CA Core Subsystem:
 
 Fixed a reported problem where an object stored to a Method Local
 or Arg was not copied to a new object during the store - the
 object pointer was simply copied to the Local/Arg.  This caused
 all subsequent operations on the Local/Arg to also affect the
 original source of the store operation.
 
 Fixed a problem where a store operation to a Method Local or Arg
 was not completed properly if the Local/Arg contained a reference
 (from RefOf) to a named field.  The general-purpose store-to-
 namespace-node code is now used so that this case is handled
 automatically.
 
 Fixed a problem where the internal object copy routine would cause
 a protection fault if the object being copied was a Package and
 contained either 1) a NULL package element or 2) a nested sub-
 package.
 
 Fixed a problem with the GPE initialization that resulted from an
 ambiguity in the ACPI specification.  One section of the
 specification states that both the address and length of the GPE
 block must be zero if the block is not supported.  Another section
 implies that only the address need be zero if the block is not
 supported.  The code has been changed so that both the address and
 the length must be non-zero to indicate a valid GPE block (i.e.,
 if either the address or the length is zero, the GPE block is
 invalid.)
 
 Code and Data Size: Current core subsystem library sizes are shown
 below.  These are the code and data sizes for the acpica.lib
 produced by the Microsoft Visual C++ 6.0 compiler, and these
 values do not include any ACPI driver or OSPM code.  The debug
 version of the code includes the debug output trace mechanism and
 has a much larger code and data size.  Note that these values will
 vary depending on the efficiency of the compiler and the compiler
 options used during generation.
 
   Previous Release
     Non-Debug Version:  71.3K Code,   9.0K Data,   80.3K Total
     Debug Version:     152.7K Code,  63.2K Data,  215.5K Total
   Current Release:
     Non-Debug Version:  71.4K Code,   9.0K Data,   80.4K Total
     Debug Version:     152.9K Code,  63.3K Data,  216.2K Total
 
 
 2) Linux
 
 Cleaned up EC driver. Exported an external EC read/write
 interface. By going through this, other drivers (most notably
 sonypi) will be able to serialize access to the EC.
 
 
 3) iASL Compiler/Disassembler
 
 Implemented support to optionally generate include files for both
 ASM and C (the -i switch).  This simplifies BIOS development by
 automatically creating include files that contain external
 declarations for the symbols that are created within the
 
 (optionally generated) ASM and C AML source files.
 
 
 ----------------------------------------
 15 November 2002.  Summary of changes for version 20021115.
 
 1) ACPI CA Core Subsystem:
 
 Fixed a memory leak problem where an error during resolution of
 
 method arguments during a method invocation from another method
 failed to cleanup properly by deleting all successfully resolved
 argument objects.
 
 Fixed a problem where the target of the Index() operator was not
 correctly constructed if the source object was a package.  This
 problem has not been detected because the use of a target operand
 with Index() is very rare.
 
 Fixed a problem with the Index() operator where an attempt was
 made to delete the operand objects twice.
 
 Fixed a problem where an attempt was made to delete an operand
 twice during execution of the CondRefOf() operator if the target
 did not exist.
 
 Implemented the first of perhaps several internal create object
 functions that create and initialize a specific object type.  This
 consolidates duplicated code wherever the object is created, thus
 shrinking the size of the subsystem.
 
 Implemented improved debug/error messages for errors that occur
 during nested method invocations.  All executing method pathnames
 are displayed (with the error) as the call stack is unwound - thus
 simplifying debug.
 
 Fixed a problem introduced in the 10/02 release that caused
 premature deletion of a buffer object if a buffer was used as an
 ASL operand where an integer operand is required (Thus causing an
 implicit object conversion from Buffer to Integer.)  The change in
 the 10/02 release was attempting to fix a memory leak (albeit
 incorrectly.)
 
 Code and Data Size: Current core subsystem library sizes are shown
 below.  These are the code and data sizes for the acpica.lib
 produced by the Microsoft Visual C++ 6.0 compiler, and these
 values do not include any ACPI driver or OSPM code.  The debug
 version of the code includes the debug output trace mechanism and
 has a much larger code and data size.  Note that these values will
 vary depending on the efficiency of the compiler and the compiler
 options used during generation.
 
   Previous Release
     Non-Debug Version:  71.9K Code,   9.1K Data,   81.0K Total
     Debug Version:     153.1K Code,  63.3K Data,  216.4K Total
   Current Release:
     Non-Debug Version:  71.3K Code,   9.0K Data,   80.3K Total
     Debug Version:     152.7K Code,  63.2K Data,  215.5K Total
 
 
 2) Linux
 
 Changed the implementation of the ACPI semaphores to use down()
 instead of down_interruptable().  It is important that the
 execution of ACPI control methods not be interrupted by signals.
 Methods must run to completion, or the system may be left in an
 unknown/unstable state.
 
 Fixed a compilation error when CONFIG_SOFTWARE_SUSPEND is not set.
 (Shawn Starr)
 
 
 3) iASL Compiler/Disassembler
 
 
 Changed the default location of output files.  All output files
 are now placed in the current directory by default instead of in
 the directory of the source file.  This change may affect some
 existing makefiles, but it brings the behavior of the compiler in
 line with other similar tools.  The location of the output files
 can be overridden with the -p command line switch.
 
 
 ----------------------------------------
 11 November 2002.  Summary of changes for version 20021111.
 
 
 0) ACPI Specification 2.0B is released and is now available at:
 http://www.acpi.info/index.html
 
 
 1) ACPI CA Core Subsystem:
 
 Implemented support for the ACPI 2.0 SMBus Operation Regions.
 This includes the early detection and handoff of the request to
 the SMBus region handler (avoiding all of the complex field
 support code), and support for the bidirectional return packet
 from an SMBus write operation.  This paves the way for the
 development of SMBus drivers in each host operating system.
 
 Fixed a problem where the semaphore WAIT_FOREVER constant was
 defined as 32 bits, but must be 16 bits according to the ACPI
 specification.  This had the side effect of causing ASL
 Mutex/Event timeouts even though the ASL code requested a wait
 forever.  Changed all internal references to the ACPI timeout
 parameter to 16 bits to prevent future problems.  Changed the name
 of WAIT_FOREVER to ACPI_WAIT_FOREVER.
 
 Code and Data Size: Current core subsystem library sizes are shown
 below.  These are the code and data sizes for the acpica.lib
 produced by the Microsoft Visual C++ 6.0 compiler, and these
 values do not include any ACPI driver or OSPM code.  The debug
 version of the code includes the debug output trace mechanism and
 has a much larger code and data size.  Note that these values will
 vary depending on the efficiency of the compiler and the compiler
 options used during generation.
 
   Previous Release
     Non-Debug Version:  71.4K Code,   9.0K Data,   80.4K Total
     Debug Version:     152.3K Code,  63.0K Data,  215.3K Total
   Current Release:
     Non-Debug Version:  71.9K Code,   9.1K Data,   81.0K Total
     Debug Version:     153.1K Code,  63.3K Data,  216.4K Total
 
 
 2) Linux
 
 Module loading/unloading fixes (John Cagle)
 
 
 3) iASL Compiler/Disassembler
 
 Added support for the SMBBlockProcessCall keyword (ACPI 2.0)
 
 Implemented support for the disassembly of all SMBus protocol
 keywords (SMBQuick, SMBWord, etc.)
 
 ----------------------------------------
 01 November 2002.  Summary of changes for version 20021101.
 
 
 1) ACPI CA Core Subsystem:
 
 Fixed a problem where platforms that have a GPE1 block but no GPE0
 block were not handled correctly.  This resulted in a "GPE
 overlap" error message.  GPE0 is no longer required.
 
 Removed code added in the previous release that inserted nodes
 into the namespace in alphabetical order.  This caused some side-
 effects on various machines.  The root cause of the problem is
 still under investigation since in theory, the internal ordering
 of the namespace nodes should not matter.
 
 
 Enhanced error reporting for the case where a named object is not
 found during control method execution.  The full ACPI namepath
 (name reference) of the object that was not found is displayed in
 this case.
 
 Note: as a result of the overhaul of the namespace object types in
 the previous release, the namespace nodes for the predefined
 scopes (_TZ, _PR, etc.) are now of the type ACPI_TYPE_LOCAL_SCOPE
 instead of ACPI_TYPE_ANY.  This simplifies the namespace
 management code but may affect code that walks the namespace tree
 looking for specific object types.
 
 Code and Data Size: Current core subsystem library sizes are shown
 below.  These are the code and data sizes for the acpica.lib
 produced by the Microsoft Visual C++ 6.0 compiler, and these
 values do not include any ACPI driver or OSPM code.  The debug
 version of the code includes the debug output trace mechanism and
 has a much larger code and data size.  Note that these values will
 vary depending on the efficiency of the compiler and the compiler
 options used during generation.
 
   Previous Release
     Non-Debug Version:  70.7K Code,   8.6K Data,   79.3K Total
     Debug Version:     151.7K Code,  62.4K Data,  214.1K Total
   Current Release:
     Non-Debug Version:  71.4K Code,   9.0K Data,   80.4K Total
     Debug Version:     152.3K Code,  63.0K Data,  215.3K Total
 
 
 2) Linux
 
 Fixed a problem introduced in the previous release where the
 Processor and Thermal objects were not recognized and installed in
 /proc.  This was related to the scope type change described above.
 
 
 3) iASL Compiler/Disassembler
 
 Implemented the -g option to get all of the required ACPI tables
 from the registry and save them to files (Windows version of the
 compiler only.)  The required tables are the FADT, FACS, and DSDT.
 
 Added ACPI table checksum validation during table disassembly in
 order to catch corrupted tables.
 
 
 ----------------------------------------
 22 October 2002.  Summary of changes for version 20021022.
 
 1) ACPI CA Core Subsystem:
 
 Implemented a restriction on the Scope operator that the target
 must already exist in the namespace at the time the operator is
 encountered (during table load or method execution).  In other
 words, forward references are not allowed and Scope() cannot
 create a new object. This changes the previous behavior where the
 interpreter would create the name if not found.  This new behavior
 correctly enables the search-to-root algorithm during namespace
 lookup of the target name.  Because of this upsearch, this fixes
 the known Compaq _SB_.OKEC problem and makes both the AML
 interpreter and iASL compiler compatible with other ACPI
 implementations.
 
 Completed a major overhaul of the internal ACPI object types for
 the ACPI Namespace and the associated operand objects.  Many of
 these types had become obsolete with the introduction of the two-
 pass namespace load.  This cleanup simplifies the code and makes
 the entire namespace load mechanism much clearer and easier to
 understand.
 
 Improved debug output for tracking scope opening/closing to help
 diagnose scoping issues.  The old scope name as well as the new
 scope name are displayed.  Also improved error messages for
 problems with ASL Mutex objects and error messages for GPE
 problems.
 
 Cleaned up the namespace dump code, removed obsolete code.
 
 All string output (for all namespace/object dumps) now uses the
 common ACPI string output procedure which handles escapes properly
 and does not emit non-printable characters.
 
 Fixed some issues with constants in the 64-bit version of the
 local C library (utclib.c)
 
 
 2) Linux
 
 EC Driver:  No longer attempts to acquire the Global Lock at
 interrupt level.
 
 
 3) iASL Compiler/Disassembler
 
 Implemented ACPI 2.0B grammar change that disallows all Type 1 and
 2 opcodes outside of a control method.  This means that the
 "executable" operators (versus the "namespace" operators) cannot
 be used at the table level; they can only be used within a control
 method.
 
 Implemented the restriction on the Scope() operator where the
 target must already exist in the namespace at the time the
 operator is encountered (during ASL compilation). In other words,
 forward references are not allowed and Scope() cannot create a new
 object.  This makes the iASL compiler compatible with other ACPI
 implementations and makes the Scope() implementation adhere to the
 ACPI specification.
 
 Fixed a problem where namepath optimization for the Alias operator
 was optimizing the wrong path (of the two namepaths.)  This caused
 a "Missing alias link" error message.
 
 Fixed a problem where an "unknown reserved name" warning could be
 incorrectly generated for names like "_SB" when the trailing
 underscore is not used in the original ASL.
 
 Fixed a problem where the reserved name check did not handle
 NamePaths with multiple NameSegs correctly.  The first nameseg of
 the NamePath was examined instead of the last NameSeg.
 
 
 ----------------------------------------
 
 02 October 2002.  Summary of changes for this release.
 
 
 1) ACPI CA Core Subsystem version 20021002:
 
 Fixed a problem where a store/copy of a string to an existing
 string did not always set the string length properly in the String
 object.
 
 Fixed a reported problem with the ToString operator where the
 behavior was identical to the ToHexString operator instead of just
 simply converting a raw buffer to a string data type.
 
 Fixed a problem where CopyObject and the other "explicit"
 conversion operators were not updating the internal namespace node
 type as part of the store operation.
 
 Fixed a memory leak during implicit source operand conversion
 where the original object was not deleted if it was converted to a
 new object of a different type.
 
 Enhanced error messages for all problems associated with namespace
 lookups.  Common procedure generates and prints the lookup name as
 well as the formatted status.
 
 Completed implementation of a new design for the Alias support
 within the namespace.  The existing design did not handle the case
 where a new object was assigned to one of the two names due to the
 use of an explicit conversion operator, resulting in the two names
 pointing to two different objects.  The new design simply points
 the Alias name to the original name node - not to the object.
 This results in a level of indirection that must be handled in the
 name resolution mechanism.
 
 Code and Data Size: Current core subsystem library sizes are shown
 below.  These are the code and data sizes for the acpica.lib
 produced by the Microsoft Visual C++ 6.0 compiler, and these
 values do not include any ACPI driver or OSPM code.  The debug
 version of the code includes the debug output trace mechanism and
 has a larger code and data size.  Note that these values will vary
 depending on the efficiency of the compiler and the compiler
 options used during generation.
 
   Previous Release
     Non-Debug Version:  69.6K Code,   8.3K Data,   77.9K Total
     Debug Version:     150.0K Code,  61.7K Data,  211.7K Total
   Current Release:
     Non-Debug Version:  70.7K Code,   8.6K Data,   79.3K Total
     Debug Version:     151.7K Code,  62.4K Data,  214.1K Total
 
 
 2) Linux
 
 Initialize thermal driver's timer before it is used. (Knut
 Neumann)
 
 Allow handling negative celsius values. (Kochi Takayoshi)
 
 Fix thermal management and make trip points. R/W (Pavel Machek)
 
 Fix /proc/acpi/sleep. (P. Christeas)
 
 IA64 fixes. (David Mosberger)
 
 Fix reversed logic in blacklist code. (Sergio Monteiro Basto)
 
 Replace ACPI_DEBUG define with ACPI_DEBUG_OUTPUT. (Dominik
 Brodowski)
 
 
 3) iASL Compiler/Disassembler
 
 Clarified some warning/error messages.
 
 
 ----------------------------------------
 18 September 2002.  Summary of changes for this release.
 
 
 1) ACPI CA Core Subsystem version 20020918:
 
 Fixed a reported problem with reference chaining (via the Index()
 and RefOf() operators) in the ObjectType() and SizeOf() operators.
 The definition of these operators includes the dereferencing of
 all chained references to return information on the base object.
 
 Fixed a problem with stores to indexed package elements - the
 existing code would not complete the store if an "implicit
 conversion" was not performed.  In other words, if the existing
 object (package element) was to be replaced completely, the code
 didn't handle this case.
 
 Relaxed typechecking on the ASL "Scope" operator to allow the
 target name to refer to an object of type Integer, String, or
 Buffer, in addition to the scoping object types (Device,
 predefined Scopes, Processor, PowerResource, and ThermalZone.)
 This allows existing AML code that has workarounds for a bug in
 Windows to function properly.  A warning is issued, however.  This
 affects both the AML interpreter and the iASL compiler. Below is
 an example of this type of ASL code:
 
       Name(DEB,0x00)
       Scope(DEB)
       {
 
 Fixed some reported problems with 64-bit integer support in the
 local implementation of C library functions (clib.c)
 
 
 2) Linux
 
 Use ACPI fix map region instead of IOAPIC region, since it is
 undefined in non-SMP.
 
 Ensure that the SCI has the proper polarity and trigger, even on
 systems that do not have an interrupt override entry in the MADT.
 
 2.5 big driver reorganization (Pat Mochel)
 
 Use early table mapping code from acpitable.c (Andi Kleen)
 
 New blacklist entries (Andi Kleen)
 
 Blacklist improvements. Split blacklist code out into a separate
 file. Move checking the blacklist to very early. Previously, we
 would use ACPI tables, and then halfway through init, check the
 blacklist -- too late. Now, it's early enough to completely fall-
 back to non-ACPI.
 
 
 3) iASL Compiler/Disassembler version 20020918:
 
 Fixed a problem where the typechecking code didn't know that an
 alias could point to a method.  In other words, aliases were not
 being dereferenced during typechecking.
 
 
 ----------------------------------------
 29 August 2002.  Summary of changes for this release.
 
 1) ACPI CA Core Subsystem Version 20020829:
 
 If the target of a Scope() operator already exists, it must be an
 object type that actually opens a scope -- such as a Device,
 Method, Scope, etc.  This is a fatal runtime error.  Similar error
 check has been added to the iASL compiler also.
 
 Tightened up the namespace load to disallow multiple names in the
 same scope.  This previously was allowed if both objects were of
 the same type.  (i.e., a lookup was the same as entering a new
 name).
 
 
 2) Linux
 
 Ensure that the ACPI interrupt has the proper trigger and
 polarity.
 
 local_irq_disable is extraneous. (Matthew Wilcox)
 
 Make "acpi=off" actually do what it says, and not use the ACPI
 interpreter *or* the tables.
 
 Added arch-neutral support for parsing SLIT and SRAT tables (Kochi
 Takayoshi)
 
 
 3) iASL Compiler/Disassembler  Version 20020829:
 
 Implemented namepath optimization for name declarations.  For
 example, a declaration like "Method (\_SB_.ABCD)" would get
 optimized to "Method (ABCD)" if the declaration is within the
 \_SB_ scope.  This optimization is in addition to the named
 reference path optimization first released in the previous
 version. This would seem to complete all possible optimizations
 for namepaths within the ASL/AML.
 
 If the target of a Scope() operator already exists, it must be an
 object type that actually opens a scope -- such as a Device,
 Method, Scope, etc.
 
 Implemented a check and warning for unreachable code in the same
 block below a Return() statement.
 
 Fixed a problem where the listing file was not generated if the
 compiler aborted if the maximum error count was exceeded (200).
 
 Fixed a problem where the typechecking of method return values was
 broken.  This includes the check for a return value when the
 method is invoked as a TermArg (a return value is expected.)
 
 Fixed a reported problem where EOF conditions during a quoted
 string or comment caused a fault.
 
 
 ----------------------------------------
 15 August 2002.  Summary of changes for this release.
 
 1) ACPI CA Core Subsystem Version 20020815:
 
 Fixed a reported problem where a Store to a method argument that
 contains a reference did not perform the indirect store correctly.
 This problem was created during the conversion to the new
 reference object model - the indirect store to a method argument
 code was not updated to reflect the new model.
 
 Reworked the ACPI mode change code to better conform to ACPI 2.0,
 handle corner cases, and improve code legibility (Kochi Takayoshi)
 
 Fixed a problem with the pathname parsing for the carat (^)
 prefix.  The heavy use of the carat operator by the new namepath
 optimization in the iASL compiler uncovered a problem with the AML
 interpreter handling of this prefix.  In the case where one or
 more carats precede a single nameseg, the nameseg was treated as
 standalone and the search rule (to root) was inadvertently
 applied.  This could cause both the iASL compiler and the
 interpreter to find the wrong object or to miss the error that
 should occur if the object does not exist at that exact pathname.
 
 Found and fixed the problem where the HP Pavilion DSDT would not
 load.  This was a relatively minor tweak to the table loading code
 (a problem caused by the unexpected encounter with a method
 invocation not within a control method), but it does not solve the
 overall issue of the execution of AML code at the table level.
 This investigation is still ongoing.
 
 Code and Data Size: Current core subsystem library sizes are shown
 below.  These are the code and data sizes for the acpica.lib
 produced by the Microsoft Visual C++ 6.0 compiler, and these
 values do not include any ACPI driver or OSPM code.  The debug
 version of the code includes the debug output trace mechanism and
 has a larger code and data size.  Note that these values will vary
 depending on the efficiency of the compiler and the compiler
 options used during generation.
 
   Previous Release
     Non-Debug Version:  69.1K Code,   8.2K Data,   77.3K Total
     Debug Version:     149.4K Code,  61.6K Data,  211.0K Total
   Current Release:
     Non-Debug Version:  69.6K Code,   8.3K Data,   77.9K Total
     Debug Version:     150.0K Code,  61.7K Data,  211.7K Total
 
 
 2) Linux
 
 Remove redundant slab.h include (Brad Hards)
 
 Fix several bugs in thermal.c (Herbert Nachtnebel)
 
 Make CONFIG_ACPI_BOOT work properly (Pavel Machek)
 
 Change acpi_system_suspend to use updated irq functions (Pavel
 Machek)
 
 Export acpi_get_firmware_table (Matthew Wilcox)
 
 Use proper root proc entry for ACPI (Kochi Takayoshi)
 
 Fix early-boot table parsing (Bjorn Helgaas)
 
 
 3) iASL Compiler/Disassembler
 
 Reworked the compiler options to make them more consistent and to
 use two-letter options where appropriate.  We were running out of
 sensible letters.   This may break some makefiles, so check the
 current options list by invoking the compiler with no parameters.
 
 Completed the design and implementation of the ASL namepath
 optimization option for the compiler.  This option optimizes all
 references to named objects to the shortest possible path.  The
 first attempt tries to utilize a single nameseg (4 characters) and
 the "search-to-root" algorithm used by the interpreter.  If that
 cannot be used (because either the name is not in the search path
 or there is a conflict with another object with the same name),
 the pathname is optimized using the carat prefix (usually a
 shorter string than specifying the entire path from the root.)
 
 Implemented support to obtain the DSDT from the Windows registry
 (when the disassembly option is specified with no input file).
 Added this code as the implementation for AcpiOsTableOverride in
 the Windows OSL.  Migrated the 16-bit code (used in the AcpiDump
 utility) to scan memory for the DSDT to the AcpiOsTableOverride
 function in the DOS OSL to make the disassembler truly OS
 independent.
 
 Implemented a new option to disassemble and compile in one step.
 When used without an input filename, this option will grab the
 DSDT from the local machine, disassemble it, and compile it in one
 step.
 
 Added a warning message for invalid escapes (a backslash followed
 by any character other than the allowable escapes).  This catches
 the quoted string error "\_SB_" (which should be "\\_SB_" ).
 
 Also, there are numerous instances in the ACPI specification where
 this error occurs.
 
 Added a compiler option to disable all optimizations.  This is
 basically the "compatibility mode" because by using this option,
 the AML code will come out exactly the same as other ASL
 compilers.
 
 Added error messages for incorrectly ordered dependent resource
 functions.  This includes: missing EndDependentFn macro at end of
 dependent resource list, nested dependent function macros (both
 start and end), and missing StartDependentFn macro.  These are
 common errors that should be caught at compile time.
 
 Implemented _OSI support for the disassembler and compiler.  _OSI
 must be included in the namespace for proper disassembly (because
 the disassembler must know the number of arguments.)
 
 Added an "optimization" message type that is optional (off by
 default).  This message is used for all optimizations - including
 constant folding, integer optimization, and namepath optimization.
 
 ----------------------------------------
 25 July 2002.  Summary of changes for this release.
 
 
 1) ACPI CA Core Subsystem Version 20020725:
 
 The AML Disassembler has been enhanced to produce compilable ASL
 code and has been integrated into the iASL compiler (see below) as
 well as the single-step disassembly for the AML debugger and the
 disassembler for the AcpiDump utility.  All ACPI 2.0A opcodes,
 resource templates and macros are fully supported.  The
 disassembler has been tested on over 30 different AML files,
 producing identical AML when the resulting disassembled ASL file
 is recompiled with the same ASL compiler.
 
 Modified the Resource Manager to allow zero interrupts and zero
 dma channels during the GetCurrentResources call.  This was
 causing problems on some platforms.
 
 Added the AcpiOsRedirectOutput interface to the OSL to simplify
 output redirection for the AcpiOsPrintf and AcpiOsVprintf
 interfaces.
 
 Code and Data Size: Current core subsystem library sizes are shown
 below.  These are the code and data sizes for the acpica.lib
 produced by the Microsoft Visual C++ 6.0 compiler, and these
 values do not include any ACPI driver or OSPM code.  The debug
 version of the code includes the debug output trace mechanism and
 has a larger code and data size.  Note that these values will vary
 depending on the efficiency of the compiler and the compiler
 options used during generation.
 
   Previous Release
     Non-Debug Version:  68.7K Code,   7.4K Data,   76.1K Total
     Debug Version:     142.9K Code,  58.7K Data,  201.6K Total
   Current Release:
     Non-Debug Version:  69.1K Code,   8.2K Data,   77.3K Total
     Debug Version:     149.4K Code,  61.6K Data,  211.0K Total
 
 
 2) Linux
 
 Fixed a panic in the EC driver (Dominik Brodowski)
 
 Implemented checksum of the R/XSDT itself during Linux table scan
 (Richard Schaal)
 
 
 3) iASL compiler
 
 The AML disassembler is integrated into the compiler.  The "-d"
 option invokes the disassembler  to completely disassemble an
 input AML file, producing as output a text ASL file with the
 extension ".dsl" (to avoid name collisions with existing .asl
 source files.)  A future enhancement will allow the disassembler
 to obtain the BIOS DSDT from the registry under Windows.
 
 Fixed a problem with the VendorShort and VendorLong resource
 descriptors where an invalid AML sequence was created.
 
 Implemented a fix for BufferData term in the ASL parser.  It was
 inadvertently defined twice, allowing invalid syntax to pass and
 causing reduction conflicts.
 
 Fixed a problem where the Ones opcode could get converted to a
 value of zero if "Ones" was used where a byte, word or dword value
 was expected.  The 64-bit value is now truncated to the correct
 size with the correct value.
 
 
 
 ----------------------------------------
 02 July 2002.  Summary of changes for this release.
 
 
 1) ACPI CA Core Subsystem Version 20020702:
 
 The Table Manager code has been restructured to add several new
 features.  Tables that are not required by the core subsystem
 (other than the FADT, DSDT, FACS, PSDTs, etc.) are no longer
 validated in any way and are returned from AcpiGetFirmwareTable if
 requested.  The AcpiOsTableOverride interface is now called for
 each table that is loaded by the subsystem in order to allow the
 host to override any table it chooses.  Previously, only the DSDT
 could be overridden.  Added one new files, tbrsdt.c and
 tbgetall.c.
 
 Fixed a problem with the conversion of internal package objects to
 external objects (when a package is returned from a control
 method.)  The return buffer length was set to zero instead of the
 proper length of the package object.
 
 Fixed a reported problem with the use of the RefOf and DeRefOf
 operators when passing reference arguments to control methods.  A
 new type of Reference object is used internally for references
 produced by the RefOf operator.
 
 Added additional error messages in the Resource Manager to explain
 AE_BAD_DATA errors when they occur during resource parsing.
 
 Split the AcpiEnableSubsystem into two primitives to enable a
 finer granularity initialization sequence.  These two calls should
 be called in this order: AcpiEnableSubsystem (flags),
 AcpiInitializeObjects (flags).  The flags parameter remains the
 same.
 
 
 2) Linux
 
 Updated the ACPI utilities module to understand the new style of
 fully resolved package objects that are now returned from the core
 subsystem.  This eliminates errors of the form:
 
     ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PPB_._PRT]
     acpi_utils-0430 [145] acpi_evaluate_reference:
         Invalid element in package (not a device reference)
 
 The method evaluation utility uses the new buffer allocation
 scheme instead of calling AcpiEvaluate Object twice.
 
 Added support for ECDT. This allows the use of the Embedded
 
 Controller before the namespace has been fully initialized, which
 is necessary for ACPI 2.0 support, and for some laptops to
 initialize properly. (Laptops using ECDT are still rare, so only
 limited testing was performed of the added functionality.)
 
 Fixed memory leaks in the EC driver.
 
 Eliminated a brittle code structure in acpi_bus_init().
 
 Eliminated the acpi_evaluate() helper function in utils.c. It is
 no longer needed since acpi_evaluate_object can optionally
 allocate memory for the return object.
 
 Implemented fix for keyboard hang when getting battery readings on
 some systems (Stephen White)
 
 PCI IRQ routing update (Dominik Brodowski)
 
 Fix an ifdef to allow compilation on UP with LAPIC but no IOAPIC
 support
 
 ----------------------------------------
 11 June 2002.  Summary of changes for this release.
 
 
 1) ACPI CA Core Subsystem Version 20020611:
 
 Fixed a reported problem where constants such as Zero and One
 appearing within _PRT packages were not handled correctly within
 the resource manager code.  Originally reported against the ASL
 compiler because the code generator now optimizes integers to
 their minimal AML representation (i.e. AML constants if possible.)
 The _PRT code now handles all AML constant opcodes correctly
 (Zero, One, Ones, Revision).
 
 Fixed a problem with the Concatenate operator in the AML
 interpreter where a buffer result object was incorrectly marked as
 not fully evaluated, causing a run-time error of AE_AML_INTERNAL.
 
 All package sub-objects are now fully resolved before they are
 returned from the external ACPI interfaces.  This means that name
 strings are resolved to object handles, and constant operators
 (Zero, One, Ones, Revision) are resolved to Integers.
 
 Implemented immediate resolution of the AML Constant opcodes
 (Zero, One, Ones, Revision) to Integer objects upon detection
 within the AML stream. This has simplified and reduced the
 generated code size of the subsystem by eliminating about 10
 switch statements for these constants (which previously were
 contained in Reference objects.)  The complicating issues are that
 the Zero opcode is used as a "placeholder" for unspecified
 optional target operands and stores to constants are defined to be
 no-ops.
 
 Code and Data Size: Current core subsystem library sizes are shown
 below. These are the code and data sizes for the acpica.lib
 produced by the Microsoft Visual C++ 6.0 compiler, and these
 values do not include any ACPI driver or OSPM code.  The debug
 version of the code includes the debug output trace mechanism and
 has a larger code and data size.  Note that these values will vary
 depending on the efficiency of the compiler and the compiler
 options used during generation.
 
   Previous Release
     Non-Debug Version:  69.3K Code,   7.4K Data,   76.7K Total
     Debug Version:     143.8K Code,  58.8K Data,  202.6K Total
   Current Release:
     Non-Debug Version:  68.7K Code,   7.4K Data,   76.1K Total
     Debug Version:     142.9K Code,  58.7K Data,  201.6K Total
 
 
 2) Linux
 
 
 Added preliminary support for obtaining _TRA data for PCI root
 bridges (Bjorn Helgaas).
 
 
 3) iASL Compiler Version X2046:
 
 Fixed a problem where the "_DDN" reserved name was defined to be a
 control method with one argument.  There are no arguments, and
 _DDN does not have to be a control method.
 
 Fixed a problem with the Linux version of the compiler where the
 source lines printed with error messages were the wrong lines.
 This turned out to be the "LF versus CR/LF" difference between
 Windows and Unix.  This appears to be the longstanding issue
 concerning listing output and error messages.
 
 Fixed a problem with the Linux version of compiler where opcode
 names within error messages were wrong.  This was caused by a
 slight difference in the output of the Flex tool on Linux versus
 Windows.
 
 Fixed a problem with the Linux compiler where the hex output files
 contained some garbage data caused by an internal buffer overrun.
 
 
 ----------------------------------------
 17 May 2002.  Summary of changes for this release.
 
 
 1) ACPI CA Core Subsystem Version 20020517:
 
 Implemented a workaround to an BIOS bug discovered on the HP
 OmniBook where the FADT revision number and the table size are
 inconsistent (ACPI 2.0 revision vs. ACPI 1.0 table size).  The new
 behavior is to fallback to using only the ACPI 1.0 fields of the
 FADT if the table is too small to be a ACPI 2.0 table as claimed
 by the revision number.  Although this is a BIOS bug, this is a
 case where the workaround is simple enough and with no side
 effects, so it seemed prudent to add it.  A warning message is
 issued, however.
 
 Implemented minimum size checks for the fixed-length ACPI tables -
 - the FADT and FACS, as well as consistency checks between the
 revision number and the table size.
 
 Fixed a reported problem in the table override support where the
 new table pointer was incorrectly treated as a physical address
 instead of a logical address.
 
 Eliminated the use of the AE_AML_ERROR exception and replaced it
 with more descriptive codes.
 
 Fixed a problem where an exception would occur if an ASL Field was
 defined with no named Field Units underneath it (used by some
 index fields).
 
 Code and Data Size: Current core subsystem library sizes are shown
 below.  These are the code and data sizes for the acpica.lib
 produced by the Microsoft Visual C++ 6.0 compiler, and these
 values do not include any ACPI driver or OSPM code.  The debug
 version of the code includes the debug output trace mechanism and
 has a larger code and data size.  Note that these values will vary
 depending on the efficiency of the compiler and the compiler
 options used during generation.
 
   Previous Release
     Non-Debug Version:  68.8K Code,   7.1K Data,   75.9K Total
     Debug Version:     142.9K Code,  58.4K Data,  201.3K Total
   Current Release:
     Non-Debug Version:  69.3K Code,   7.4K Data,   76.7K Total
     Debug Version:     143.8K Code,  58.8K Data,  202.6K Total
 
 
 
 2) Linux
 
 Much work done on ACPI init (MADT and PCI IRQ routing support).
 (Paul D. and Dominik Brodowski)
 
 Fix PCI IRQ-related panic on boot (Sam Revitch)
 
 Set BM_ARB_DIS when entering a sleep state (Ducrot Bruno)
 
 Fix "MHz" typo (Dominik Brodowski)
 
 Fix RTC year 2000 issue (Dominik Brodowski)
 
 Preclude multiple button proc entries (Eric Brunet)
 
 Moved arch-specific code out of include/platform/aclinux.h
 
 3) iASL Compiler Version X2044:
 
 Implemented error checking for the string used in the EISAID macro
 (Usually used in the definition of the _HID object.)  The code now
 strictly enforces the PnP format - exactly 7 characters, 3
 uppercase letters and 4 hex digits.
 
 If a raw string is used in the definition of the _HID object
 (instead of the EISAID macro), the string must contain all
 alphanumeric characters (e.g., "*PNP0011" is not allowed because
 of the asterisk.)
 
 Implemented checking for invalid use of ACPI reserved names for
 most of the name creation operators (Name, Device, Event, Mutex,
 OperationRegion, PowerResource, Processor, and ThermalZone.)
 Previously, this check was only performed for control methods.
 
 Implemented an additional check on the Name operator to emit an
 error if a reserved name that must be implemented in ASL as a
 control method is used.  We know that a reserved name must be a
 method if it is defined with input arguments.
 
 The warning emitted when a namespace object reference is not found
 during the cross reference phase has been changed into an error.
 The "External" directive should be used for names defined in other
 modules.
 
 
 4) Tools and Utilities
 
 The 16-bit tools (adump16 and aexec16) have been regenerated and
 tested.
 
 Fixed a problem with the output of both acpidump and adump16 where
 the indentation of closing parentheses and brackets was not
 
 aligned properly with the parent block.
 
 
 ----------------------------------------
 03 May 2002.  Summary of changes for this release.
 
 
 1) ACPI CA Core Subsystem Version 20020503:
 
 Added support a new OSL interface that allows the host operating
 
 system software to override the DSDT found in the firmware -
 AcpiOsTableOverride.  With this interface, the OSL can examine the
 version of the firmware DSDT and replace it with a different one
 if desired.
 
 Added new external interfaces for accessing ACPI registers from
 device drivers and other system software - AcpiGetRegister and
 AcpiSetRegister.  This was simply an externalization of the
 existing AcpiHwBitRegister interfaces.
 
 Fixed a regression introduced in the previous build where the
 ASL/AML CreateField operator always returned an error,
 "destination must be a NS Node".
 
 Extended the maximum time (before failure) to successfully enable
 ACPI mode to 3 seconds.
 
 Code and Data Size: Current core subsystem library sizes are shown
 below.  These are the code and data sizes for the acpica.lib
 produced by the Microsoft Visual C++ 6.0 compiler, and these
 values do not include any ACPI driver or OSPM code.  The debug
 version of the code includes the debug output trace mechanism and
 has a larger code and data size.  Note that these values will vary
 depending on the efficiency of the compiler and the compiler
 options used during generation.
 
   Previous Release
     Non-Debug Version:  68.5K Code,   7.0K Data,   75.5K Total
     Debug Version:     142.4K Code,  58.3K Data,  200.7K Total
   Current Release:
     Non-Debug Version:  68.8K Code,   7.1K Data,   75.9K Total
     Debug Version:     142.9K Code,  58.4K Data,  201.3K Total
 
 
 2) Linux
 
 Enhanced ACPI init code for SMP. We are now fully MPS and $PIR-
 free. While 3 out of 4 of our in-house systems work fine, the last
 one still hangs when testing the LAPIC timer.
 
 Renamed many files in 2.5 kernel release to omit "acpi_" from the
 name.
 
 Added warning on boot for Presario 711FR.
 
 Sleep improvements (Pavel Machek)
 
 ACPI can now be built without CONFIG_PCI enabled.
 
 IA64: Fixed memory map functions (JI Lee)
 
 
 3) iASL Compiler Version X2043:
 
 Added support to allow the compiler to be integrated into the MS
 VC++ development environment for one-button compilation of single
 files or entire projects -- with error-to-source-line mapping.
 
 Implemented support for compile-time constant folding for the
 Type3, Type4, and Type5 opcodes first defined in the ACPI 2.0
 specification.  This allows the ASL writer to use expressions
 instead of Integer/Buffer/String constants in terms that must
 evaluate to constants at compile time and will also simplify the
 emitted AML in any such sub-expressions that can be folded
 (evaluated at compile-time.)  This increases the size of the
 compiler significantly because a portion of the ACPI CA AML
 interpreter is included within the compiler in order to pre-
 evaluate constant expressions.
 
 
 Fixed a problem with the "Unicode" ASL macro that caused the
 compiler to fault.  (This macro is used in conjunction with the
 _STR reserved name.)
 
 Implemented an AML opcode optimization to use the Zero, One, and
 Ones opcodes where possible to further reduce the size of integer
 constants and thus reduce the overall size of the generated AML
 code.
 
 Implemented error checking for new reserved terms for ACPI version
 2.0A.
 
 Implemented the -qr option to display the current list of ACPI
 reserved names known to the compiler.
 
 Implemented the -qc option to display the current list of ASL
 operators that are allowed within constant expressions and can
 therefore be folded at compile time if the operands are constants.
 
 
 4) Documentation
 
 Updated the Programmer's Reference for new interfaces, data types,
 and memory allocation model options.
 
 Updated the iASL Compiler User Reference to apply new format and
 add information about new features and options.
 
 ----------------------------------------
 19 April 2002.  Summary of changes for this release.
 
 1) ACPI CA Core Subsystem Version 20020419:
 
 The source code base for the Core Subsystem has been completely
 cleaned with PC-lint (FlexLint) for both 32-bit and 64-bit
 versions.  The Lint option files used are included in the
 /acpi/generate/lint directory.
 
 Implemented enhanced status/error checking across the entire
 Hardware manager subsystem.  Any hardware errors (reported from
 the OSL) are now bubbled up and will abort a running control
 method.
 
 
 Fixed a problem where the per-ACPI-table integer width (32 or 64)
 was stored only with control method nodes, causing a fault when
 non-control method code was executed during table loading.  The
 solution implemented uses a global variable to indicate table
 width across the entire ACPI subsystem.  Therefore, ACPI CA does
 not support mixed integer widths across different ACPI tables
 (DSDT, SSDT).
 
 Fixed a problem where NULL extended fields (X fields) in an ACPI
 2.0 ACPI FADT caused the table load to fail.  Although the
 existing ACPI specification is a bit fuzzy on this topic, the new
 behavior is to fall back on a ACPI 1.0 field if the corresponding
 ACPI 2.0 X field is zero (even though the table revision indicates
 a full ACPI 2.0 table.)  The ACPI specification will be updated to
 clarify this issue.
 
 Fixed a problem with the SystemMemory operation region handler
 where memory was always accessed byte-wise even if the AML-
 specified access width was larger than a byte.  This caused
 problems on systems with memory-mapped I/O.  Memory is now
 accessed with the width specified.  On systems that do not support
 non-aligned transfers, a check is made to guarantee proper address
 alignment before proceeding in order to avoid an AML-caused
 alignment fault within the kernel.
 
 
 Fixed a problem with the ExtendedIrq resource where only one byte
 of the 4-byte Irq field was extracted.
 
 Fixed the AcpiExDigitsNeeded() procedure to support _UID.  This
 function was out of date and required a rewrite.
 
 Code and Data Size: Current core subsystem library sizes are shown
 below.  These are the code and data sizes for the acpica.lib
 produced by the Microsoft Visual C++ 6.0 compiler, and these
 values do not include any ACPI driver or OSPM code.  The debug
 version of the code includes the debug output trace mechanism and
 has a larger code and data size.  Note that these values will vary
 depending on the efficiency of the compiler and the compiler
 options used during generation.
 
   Previous Release
     Non-Debug Version:  66.6K Code,   6.5K Data,   73.1K Total
     Debug Version:     139.8K Code,  57.4K Data,  197.2K Total
   Current Release:
     Non-Debug Version:  68.5K Code,   7.0K Data,   75.5K Total
     Debug Version:     142.4K Code,  58.3K Data,  200.7K Total
 
 
 2) Linux
 
 PCI IRQ routing fixes (Dominik Brodowski)
 
 
 3) iASL Compiler Version X2042:
 
 Implemented an additional compile-time error check for a field
 unit whose size + minimum access width would cause a run-time
 access beyond the end-of-region.  Previously, only the field size
 itself was checked.
 
 The Core subsystem and iASL compiler now share a common parse
 object in preparation for compile-time evaluation of the type
 3/4/5 ASL operators.
 
 
 ----------------------------------------
 Summary of changes for this release: 03_29_02
 
 1) ACPI CA Core Subsystem Version 20020329:
 
 Implemented support for late evaluation of TermArg operands to
 Buffer and Package objects.  This allows complex expressions to be
 used in the declarations of these object types.
 
 Fixed an ACPI 1.0 compatibility issue when reading Fields. In ACPI
 1.0, if the field was larger than 32 bits, it was returned as a
 buffer - otherwise it was returned as an integer.  In ACPI 2.0,
 the field is returned as a buffer only if the field is larger than
 64 bits.  The TableRevision is now considered when making this
 conversion to avoid incompatibility with existing ASL code.
 
 Implemented logical addressing for AcpiOsGetRootPointer.  This
 allows an RSDP with either a logical or physical address.  With
 this support, the host OS can now override all ACPI tables with
 one logical RSDP.  Includes implementation of  "typed" pointer
 support to allow a common data type for both physical and logical
 pointers internally.  This required a change to the
 AcpiOsGetRootPointer interface.
 
 Implemented the use of ACPI 2.0 Generic Address Structures for all
 GPE, Fixed Event, and PM Timer I/O.  This allows the use of memory
 mapped I/O for these ACPI features.
 
 Initialization now ignores not only non-required tables (All
 tables other than the FADT, FACS, DSDT, and SSDTs), but also does
 not validate the table headers of unrecognized tables.
 
 Fixed a problem where a notify handler could only be
 installed/removed on an object of type Device.  All "notify"
 
 objects are now supported -- Devices, Processor, Power, and
 Thermal.
 
 Removed most verbosity from the ACPI_DB_INFO debug level.  Only
 critical information is returned when this debug level is enabled.
 
 Code and Data Size: Current core subsystem library sizes are shown
 below.  These are the code and data sizes for the acpica.lib
 produced by the Microsoft Visual C++ 6.0 compiler, and these
 values do not include any ACPI driver or OSPM code.  The debug
 version of the code includes the debug output trace mechanism and
 has a larger code and data size.  Note that these values will vary
 depending on the efficiency of the compiler and the compiler
 options used during generation.
 
   Previous Release
     Non-Debug Version:  65.4K Code,   6.2K Data,   71.6K Total
     Debug Version:     138.0K Code,  56.6K Data,  194.6K Total
   Current Release:
     Non-Debug Version:  66.6K Code,   6.5K Data,   73.1K Total
     Debug Version:     139.8K Code,  57.4K Data,  197.2K Total
 
 
 2) Linux:
 
 The processor driver (acpi_processor.c) now fully supports ACPI
 2.0-based processor performance control (e.g. Intel(R)
 SpeedStep(TM) technology) Note that older laptops that only have
 the Intel "applet" interface are not supported through this.  The
 'limit' and 'performance' interface (/proc) are fully functional.
 [Note that basic policy for controlling performance state
 transitions will be included in the next version of ospmd.]  The
 idle handler was modified to more aggressively use C2, and PIIX4
 errata handling underwent a complete overhaul (big thanks to
 Dominik Brodowski).
 
 Added support for ACPI-PCI device binding (acpi_pci_root.c). _ADR-
 based devices in the ACPI namespace are now dynamically bound
 (associated) with their PCI counterparts (e.g. PCI1->01:00.0).
 This allows, among other things, ACPI to resolve bus numbers for
 subordinate PCI bridges.
 
 Enhanced PCI IRQ routing to get the proper bus number for _PRT
 entries defined underneath PCI bridges.
 
 Added IBM 600E to bad bios list due to invalid _ADR value for
 PIIX4 PCI-ISA bridge, resulting in improper PCI IRQ routing.
 
 In the process of adding full MADT support (e.g. IOAPIC) for IA32
 (acpi.c, mpparse.c) -- stay tuned.
 
 Added back visual differentiation between fixed-feature and
 control-method buttons in dmesg.  Buttons are also subtyped (e.g.
 button/power/PWRF) to simplify button identification.
 
 We no longer use -Wno-unused when compiling debug. Please ignore
 any "_THIS_MODULE defined but not used" messages.
 
 Can now shut down the system using "magic sysrq" key.
 
 
 3) iASL Compiler version 2041:
 
 Fixed a problem where conversion errors for hex/octal/decimal
 constants were not reported.
 
 Implemented a fix for the General Register template Address field.
 This field was 8 bits when it should be 64.
 
 Fixed a problem where errors/warnings were no longer being emitted
 within the listing output file.
 
 Implemented the ACPI 2.0A restriction on ACPI Table Signatures to
 exactly 4 characters, alphanumeric only.
 
 
 
 
 ----------------------------------------
 Summary of changes for this release: 03_08_02
 
 
 1) ACPI CA Core Subsystem Version 20020308:
 
 Fixed a problem with AML Fields where the use of the "AccessAny"
 keyword could cause an interpreter error due to attempting to read
 or write beyond the end of the parent Operation Region.
 
 Fixed a problem in the SystemMemory Operation Region handler where
 an attempt was made to map memory beyond the end of the region.
 This was the root cause of the "AE_ERROR" and "AE_NO_MEMORY"
 errors on some Linux systems.
 
 Fixed a problem where the interpreter/namespace "search to root"
 algorithm was not functioning for some object types.  Relaxed the
 internal restriction on the search to allow upsearches for all
 external object types as well as most internal types.
 
 
 2) Linux:
 
 We now use safe_halt() macro versus individual calls to sti | hlt.
 
 Writing to the processor limit interface should now work. "echo 1"
 will increase the limit, 2 will decrease, and 0 will reset to the
 
 default.
 
 
 3) ASL compiler:
 
 Fixed segfault on Linux version.
 
 
 ----------------------------------------
 Summary of changes for this release: 02_25_02
 
 1) ACPI CA Core Subsystem:
 
 
 Fixed a problem where the GPE bit masks were not initialized
 properly, causing erratic GPE behavior.
 
 Implemented limited support for multiple calling conventions.  The
 code can be generated with either the VPL (variable parameter
 list, or "C") convention, or the FPL (fixed parameter list, or
 "Pascal") convention.  The core subsystem is about 3.4% smaller
 when generated with FPL.
 
 
 2) Linux
 
 Re-add some /proc/acpi/event functionality that was lost during
 the rewrite
 
 Resolved issue with /proc events for fixed-feature buttons showing
 up as the system device.
 
 Fixed checks on C2/C3 latencies to be inclusive of maximum values.
 
 Replaced AE_ERRORs in acpi_osl.c with more specific error codes.
 
 Changed ACPI PRT option from "pci=noacpi-routing" to "pci=noacpi"
 
 Fixed limit interface & usage to fix bugs with passive cooling
 hysterisis.
 
 Restructured PRT support.
 
 
 ----------------------------------------
 Summary of changes for this label: 02_14_02
 
 
 1) ACPI CA Core Subsystem:
 
 Implemented support in AcpiLoadTable to allow loading of FACS and
 FADT tables.
 
 Support for the now-obsolete interim 0.71 64-bit ACPI tables has
 been removed.  All 64-bit platforms should be migrated to the ACPI
 2.0 tables.  The actbl71.h header has been removed from the source
 tree.
 
 All C macros defined within the subsystem have been prefixed with
 "ACPI_" to avoid collision with other system include files.
 
 Removed the return value for the two AcpiOsPrint interfaces, since
 it is never used and causes lint warnings for ignoring the return
 value.
 
 Added error checking to all internal mutex acquire and release
 calls.  Although a failure from one of these interfaces is
 probably a fatal system error, these checks will cause the
 immediate abort of the currently executing method or interface.
 
 Fixed a problem where the AcpiSetCurrentResources interface could
 fault.  This was a side effect of the deployment of the new memory
 allocation model.
 
 Fixed a couple of problems with the Global Lock support introduced
 in the last major build.  The "common" (1.0/2.0) internal FACS was
 being overwritten with the FACS signature and clobbering the
 Global Lock pointer.  Also, the actual firmware FACS was being
 unmapped after construction of the "common" FACS, preventing
 access to the actual Global Lock field within it.  The "common"
 internal FACS is no longer installed as an actual ACPI table; it
 is used simply as a global.
 
 Code and Data Size: Current core subsystem library sizes are shown
 below.  These are the code and data sizes for the acpica.lib
 produced by the Microsoft Visual C++ 6.0 compiler, and these
 values do not include any ACPI driver or OSPM code.  The debug
 version of the code includes the debug output trace mechanism and
 has a larger code and data size.  Note that these values will vary
 depending on the efficiency of the compiler and the compiler
 options used during generation.
 
   Previous Release (02_07_01)
     Non-Debug Version:  65.2K Code,   6.2K Data,   71.4K Total
     Debug Version:     136.9K Code,  56.4K Data,  193.3K Total
   Current Release:
     Non-Debug Version:  65.4K Code,   6.2K Data,   71.6K Total
     Debug Version:     138.0K Code,  56.6K Data,  194.6K Total
 
 
 2) Linux
 
 Updated Linux-specific code for core macro and OSL interface
 changes described above.
 
 Improved /proc/acpi/event. It now can be opened only once and has
 proper poll functionality.
 
 Fixed and restructured power management (acpi_bus).
 
 Only create /proc "view by type" when devices of that class exist.
 
 Fixed "charging/discharging" bug (and others) in acpi_battery.
 
 Improved thermal zone code.
 
 
 3) ASL Compiler, version X2039:
 
 
 Implemented the new compiler restriction on ASL String hex/octal
 escapes to non-null, ASCII values.  An error results if an invalid
 value is used.  (This will require an ACPI 2.0 specification
 change.)
 
 AML object labels that are output to the optional C and ASM source
 are now prefixed with both the ACPI table signature and table ID
 to help guarantee uniqueness within a large BIOS project.
 
 
 ----------------------------------------
 Summary of changes for this label: 02_01_02
 
 1) ACPI CA Core Subsystem:
 
 ACPI 2.0 support is complete in the entire Core Subsystem and the
 ASL compiler. All new ACPI 2.0 operators are implemented and all
 other changes for ACPI 2.0 support are complete.  With
 simultaneous code and data optimizations throughout the subsystem,
 ACPI 2.0 support has been implemented with almost no additional
 cost in terms of code and data size.
 
 Implemented a new mechanism for allocation of return buffers.  If
 the buffer length is set to ACPI_ALLOCATE_BUFFER, the buffer will
 be allocated on behalf of the caller.  Consolidated all return
 buffer validation and allocation to a common procedure.  Return
 buffers will be allocated via the primary OSL allocation interface
 since it appears that a separate pool is not needed by most users.
 If a separate pool is required for these buffers, the caller can
 still use the original mechanism and pre-allocate the buffer(s).
 
 Implemented support for string operands within the DerefOf
 operator.
 
 Restructured the Hardware and Event managers to be table driven,
 simplifying the source code and reducing the amount of generated
 code.
 
 Split the common read/write low-level ACPI register bitfield
 procedure into a separate read and write, simplifying the code
 considerably.
 
 Obsoleted the AcpiOsCallocate OSL interface.  This interface was
 used only a handful of times and didn't have enough critical mass
 for a separate interface.  Replaced with a common calloc procedure
 in the core.
 
 Fixed a reported problem with the GPE number mapping mechanism
 that allows GPE1 numbers to be non-contiguous with GPE0.
 Reorganized the GPE information and shrunk a large array that was
 originally large enough to hold info for all possible GPEs (256)
 to simply large enough to hold all GPEs up to the largest GPE
 number on the machine.
 
 Fixed a reported problem with resource structure alignment on 64-
 bit platforms.
 
 Changed the AcpiEnableEvent and AcpiDisableEvent external
 interfaces to not require any flags for the common case of
 enabling/disabling a GPE.
 
 Implemented support to allow a "Notify" on a Processor object.
 
 Most TBDs in comments within the source code have been resolved
 and eliminated.
 
 
 Fixed a problem in the interpreter where a standalone parent
 prefix (^) was not handled correctly in the interpreter and
 debugger.
 
 Removed obsolete and unnecessary GPE save/restore code.
 
 Implemented Field support in the ASL Load operator.  This allows a
 table to be loaded from a named field, in addition to loading a
 table directly from an Operation Region.
 
 Implemented timeout and handle support in the external Global Lock
 interfaces.
 
 Fixed a problem in the AcpiDump utility where pathnames were no
 longer being generated correctly during the dump of named objects.
 
 Modified the AML debugger to give a full display of if/while
 predicates instead of just one AML opcode at a time.  (The
 predicate can have several nested ASL statements.)  The old method
 was confusing during single stepping.
 
 Code and Data Size: Current core subsystem library sizes are shown
 below. These are the code and data sizes for the acpica.lib
 produced by the Microsoft Visual C++ 6.0 compiler, and these
 values do not include any ACPI driver or OSPM code.  The debug
 version of the code includes the debug output trace mechanism and
 has a larger code and data size.  Note that these values will vary
 depending on the efficiency of the compiler and the compiler
 options used during generation.
 
   Previous Release (12_18_01)
      Non-Debug Version:  66.1K Code,   5.5K Data,   71.6K Total
      Debug Version:     138.3K Code,  55.9K Data,  194.2K Total
    Current Release:
      Non-Debug Version:  65.2K Code,   6.2K Data,   71.4K Total
      Debug Version:     136.9K Code,  56.4K Data,  193.3K Total
 
 2) Linux
 
  Implemented fix for PIIX reverse throttling errata (Processor
 driver)
 
 Added new Limit interface (Processor and Thermal drivers)
 
 New thermal policy (Thermal driver)
 
 Many updates to /proc
 
 Battery "low" event support (Battery driver)
 
 Supports ACPI PCI IRQ routing (PCI Link and PCI root drivers)
 
 IA32 - IA64 initialization unification, no longer experimental
 
 Menuconfig options redesigned
 
 3) ASL Compiler, version X2037:
 
 Implemented several new output features to simplify integration of
 AML code into  firmware: 1) Output the AML in C source code with
 labels for each named ASL object.  The    original ASL source code
 is interleaved as C comments. 2) Output the AML in ASM source code
 with labels and interleaved ASL    source. 3) Output the AML in
 raw hex table form, in either C or ASM.
 
 Implemented support for optional string parameters to the
 LoadTable operator.
 
 Completed support for embedded escape sequences within string
 literals.  The compiler now supports all single character escapes
 as well as the Octal and Hex escapes.  Note: the insertion of a
 null byte into a string literal (via the hex/octal escape) causes
 the string to be immediately terminated.  A warning is issued.
 
 Fixed a problem where incorrect AML was generated for the case
 where an ASL namepath consists of a single parent prefix (
 
 ) with no trailing name segments.
 
 The compiler has been successfully generated with a 64-bit C
 compiler.
 
 
 
 
 ----------------------------------------
 Summary of changes for this label: 12_18_01
 
 1) Linux
 
 Enhanced blacklist with reason and severity fields. Any table's
 signature may now be used to identify a blacklisted system.
 
 Call _PIC control method to inform the firmware which interrupt
 model the OS is using. Turn on any disabled link devices.
 
 Cleaned up busmgr /proc error handling (Andreas Dilger)
 
  2) ACPI CA Core Subsystem:
 
 Implemented ACPI 2.0 semantics for the "Break" operator (Exit from
 while loop)
 
 Completed implementation of the ACPI 2.0 "Continue",
 "ConcatenateResTemplate", "DataTableRegion", and "LoadTable"
 operators.  All new ACPI 2.0 operators are now implemented in both
 the ASL compiler and the AML interpreter.  The only remaining ACPI
 2.0 task is support for the String data type in the DerefOf
 operator.  Fixed a problem with AcquireMutex where the status code
 was lost if the caller had to actually wait for the mutex.
 
 Increased the maximum ASL Field size from 64K bits to 4G bits.
 
 Completed implementation of the external Global Lock interfaces --
 AcpiAcquireGlobalLock and AcpiReleaseGlobalLock.  The Timeout and
 Handler parameters were added.
 
 Completed another pass at removing warnings and issues when
 compiling with 64-bit compilers.  The code now compiles cleanly
 with the Intel 64-bit C/C++ compiler.  Most notably, the pointer
 add and subtract (diff) macros have changed considerably.
 
 
 Created and deployed a new ACPI_SIZE type that is 64-bits wide on
 64-bit platforms, 32-bits on all others.  This type is used
 wherever memory allocation and/or the C sizeof() operator is used,
 and affects the OSL memory allocation interfaces AcpiOsAllocate
 and AcpiOsCallocate.
 
 Implemented sticky user breakpoints in the AML debugger.
 
 Code and Data Size: Current core subsystem library sizes are shown
 below. These are the code and data sizes for the acpica.lib
 produced by the Microsoft Visual C++ 6.0 compiler, and these
 values do not include any ACPI driver or OSPM code.  The debug
 version of the code includes the debug output trace mechanism and
 has a larger code and data size. Note that these values will vary
 depending on the efficiency of the compiler and the compiler
 options used during generation.
 
   Previous Release (12_05_01)
      Non-Debug Version:  64.7K Code,   5.3K Data,   70.0K Total
      Debug Version:     136.2K Code,  55.6K Data,  191.8K Total
    Current Release:
      Non-Debug Version:  66.1K Code,   5.5K Data,   71.6K Total
      Debug Version:     138.3K Code,  55.9K Data,  194.2K Total
 
  3) ASL Compiler, version X2034:
 
 Now checks for (and generates an error if detected) the use of a
 Break or Continue statement without an enclosing While statement.
 
 
 Successfully generated the compiler with the Intel 64-bit C
 compiler.
 
  ----------------------------------------
 Summary of changes for this label: 12_05_01
 
  1) ACPI CA Core Subsystem:
 
 The ACPI 2.0 CopyObject operator is fully implemented.  This
 operator creates a new copy of an object (and is also used to
 bypass the "implicit conversion" mechanism of the Store operator.)
 
 The ACPI 2.0 semantics for the SizeOf operator are fully
 implemented.  The change is that performing a SizeOf on a
 reference object causes an automatic dereference of the object to
 the actual value before the size is evaluated. This behavior was
 undefined in ACPI 1.0.
 
 The ACPI 2.0 semantics for the Extended IRQ resource descriptor
 have been implemented.  The interrupt polarity and mode are now
 independently set.
 
 Fixed a problem where ASL Constants (Zero, One, Ones, Revision)
 appearing in Package objects were not properly converted to
 integers when the internal Package was converted to an external
 object (via the AcpiEvaluateObject interface.)
 
 Fixed a problem with the namespace object deletion mechanism for
 objects created by control methods.  There were two parts to this
 problem: 1) Objects created during the initialization phase method
 parse were not being deleted, and 2) The object owner ID mechanism
 to track objects was broken.
 
 Fixed a problem where the use of the ASL Scope operator within a
 control method would result in an invalid opcode exception.
 
 Fixed a problem introduced in the previous label where the buffer
 length required for the _PRT structure was not being returned
 correctly.
 
 Code and Data Size: Current core subsystem library sizes are shown
 below. These are the code and data sizes for the acpica.lib
 produced by the Microsoft Visual C++ 6.0 compiler, and these
 values do not include any ACPI driver or OSPM code.  The debug
 version of the code includes the debug output trace mechanism and
 has a larger code and data size.  Note that these values will vary
 depending on the efficiency of the compiler and the compiler
 options used during generation.
 
   Previous Release (11_20_01)
      Non-Debug Version:  64.1K Code,   5.3K Data,   69.4K Total
      Debug Version:     135.1K Code,  55.4K Data,  190.5K Total
 
   Current Release:
      Non-Debug Version:  64.7K Code,   5.3K Data,   70.0K Total
      Debug Version:     136.2K Code,  55.6K Data,  191.8K Total
 
  2) Linux:
 
 Updated all files to apply cleanly against 2.4.16.
 
 Added basic PCI Interrupt Routing Table (PRT) support for IA32
 (acpi_pci.c), and unified the PRT code for IA32 and IA64.  This
 version supports both static and dynamic PRT entries, but dynamic
 entries are treated as if they were static (not yet
 reconfigurable).  Architecture- specific code to use this data is
 absent on IA32 but should be available shortly.
 
 Changed the initialization sequence to start the ACPI interpreter
 (acpi_init) prior to initialization of the PCI driver (pci_init)
 in init/main.c.  This ordering is required to support PRT and
 facilitate other (future) enhancement.  A side effect is that the
 ACPI bus driver and certain device drivers can no longer be loaded
 as modules.
 
 Modified the 'make menuconfig' options to allow PCI Interrupt
 Routing support to be included without the ACPI Bus and other
 device drivers.
 
  3) ASL Compiler, version X2033:
 
 Fixed some issues with the use of the new CopyObject and
 DataTableRegion operators.  Both are fully functional.
 
  ----------------------------------------
 Summary of changes for this label: 11_20_01
 
  20 November 2001.  Summary of changes for this release.
 
  1) ACPI CA Core Subsystem:
 
 Updated Index support to match ACPI 2.0 semantics.  Storing a
 Integer, String, or Buffer to an Index of a Buffer will store only
 the least-significant byte of the source to the Indexed buffer
 byte.  Multiple writes are not performed.
 
 Fixed a problem where the access type used in an AccessAs ASL
 operator was not recorded correctly into the field object.
 
 Fixed a problem where ASL Event objects were created in a
 signalled state. Events are now created in an unsignalled state.
 
 The internal object cache is now purged after table loading and
 initialization to reduce the use of dynamic kernel memory -- on
 the assumption that object use is greatest during the parse phase
 of the entire table (versus the run-time use of individual control
 methods.)
 
 ACPI 2.0 variable-length packages are now fully operational.
 
 Code and Data Size: Code and Data optimizations have permitted new
 feature development with an actual reduction in the library size.
 Current core subsystem library sizes are shown below.  These are
 the code and data sizes for the acpica.lib produced by the
 Microsoft Visual C++ 6.0 compiler, and these values do not include
 any ACPI driver or OSPM code.  The debug version of the code
 includes the debug output trace mechanism and has a larger code
 and data size.  Note that these values will vary depending on the
 efficiency of the compiler and the compiler options used during
 generation.
 
   Previous Release (11_09_01):
      Non-Debug Version:  63.7K Code,   5.2K Data,   68.9K Total
      Debug Version:     134.5K Code,  55.4K Data,  189.9K Total
 
   Current Release:
      Non-Debug Version:  64.1K Code,   5.3K Data,   69.4K Total
      Debug Version:     135.1K Code,  55.4K Data,  190.5K Total
 
  2) Linux:
 
 Enhanced the ACPI boot-time initialization code to allow the use
 of Local APIC tables for processor enumeration on IA-32, and to
 pave the way for a fully MPS-free boot (on SMP systems) in the
 near future.  This functionality replaces
 arch/i386/kernel/acpitables.c, which was introduced in an earlier
 2.4.15-preX release.  To enable this feature you must add
 "acpi_boot=on" to the kernel command line -- see the help entry
 for CONFIG_ACPI_BOOT for more information.  An IA-64 release is in
 the works...
 
 Restructured the configuration options to allow boot-time table
 parsing support without inclusion of the ACPI Interpreter (and
 other) code.
 
 NOTE: This release does not include fixes for the reported events,
 power-down, and thermal passive cooling issues (coming soon).
 
  3) ASL Compiler:
 
 Added additional typechecking for Fields within restricted access
 Operation Regions.  All fields within EC and CMOS regions must be
 declared with ByteAcc. All fields within SMBus regions must be
 declared with the BufferAcc access type.
 
 Fixed a problem where the listing file output of control methods
 no longer interleaved the actual AML code with the ASL source
 code.
 
 
 
 
 ----------------------------------------
 Summary of changes for this label: 11_09_01
 
 1) ACPI CA Core Subsystem:
 
 Implemented ACPI 2.0-defined support for writes to fields with a
 Buffer, String, or Integer source operand that is smaller than the
 target field. In these cases, the source operand is zero-extended
 to fill the target field.
 
 Fixed a problem where a Field starting bit offset (within the
 parent operation region) was calculated incorrectly if the
 
 alignment of the field differed from the access width.  This
 affected CreateWordField, CreateDwordField, CreateQwordField, and
 possibly other fields that use the "AccessAny" keyword.
 
 Fixed a problem introduced in the 11_02_01 release where indirect
 stores through method arguments did not operate correctly.
 
 2) Linux:
 
 Implemented boot-time ACPI table parsing support
 (CONFIG_ACPI_BOOT) for IA32 and IA64 UP/SMP systems.  This code
 facilitates the use of ACPI tables (e.g. MADT, SRAT) rather than
 legacy BIOS interfaces (e.g. MPS) for the configuration of system
 processors, memory, and interrupts during setup_arch().  Note that
 this patch does not include the required architecture-specific
 changes required to apply this information -- subsequent patches
 will be posted for both IA32 and IA64 to achieve this.
 
 Added low-level sleep support for IA32 platforms, courtesy of Pat
 Mochel. This allows IA32 systems to transition to/from various
 sleeping states (e.g. S1, S3), although the lack of a centralized
 driver model and power-manageable drivers will prevent its
 (successful) use on most systems.
 
 Revamped the ACPI 'menuconfig' layout: created new "ACPI Support"
 submenu, unified IA32 and IA64 options, added new "Boot using ACPI
 tables" option, etc.
 
 Increased the default timeout for the EC driver from 1ms to 10ms
 (1000 cycles of 10us) to try to address AE_TIME errors during EC
 transactions.
 
  ----------------------------------------
 Summary of changes for this label: 11_02_01
 
 1) ACPI CA Core Subsystem:
 
 ACPI 2.0 Support: Implemented ACPI 2.0 64-bit Field access
 (QWordAcc keyword). All ACPI 2.0 64-bit support is now
 implemented.
 
 OSL Interfaces: Several of the OSL (AcpiOs*) interfaces required
 changes to support ACPI 2.0 Qword field access.  Read/Write
 PciConfiguration(), Read/Write Memory(), and Read/Write Port() now
 accept an ACPI_INTEGER (64 bits) as the value parameter.  Also,
 the value parameter for the address space handler interface is now
 an ACPI_INTEGER.  OSL implementations of these interfaces must now
 handle the case where the Width parameter is 64.
 
 Index Fields: Fixed a problem where unaligned bit assembly and
 disassembly for IndexFields was not supported correctly.
 
 Index and Bank Fields:  Nested Index and Bank Fields are now
 supported. During field access, a check is performed to ensure
 that the value written to an Index or Bank register is not out of
 the range of the register.  The Index (or Bank) register is
 written before each access to the field data. Future support will
 include allowing individual IndexFields to be wider than the
 DataRegister width.
 
 Fields: Fixed a problem where the AML interpreter was incorrectly
 attempting to write beyond the end of a Field/OpRegion.  This was
 a boundary case that occurred when a DWORD field was written to a
 BYTE access OpRegion, forcing multiple writes and causing the
 interpreter to write one datum too many.
 
 Fields: Fixed a problem with Field/OpRegion access where the
 starting bit address of a field was incorrectly calculated if the
 current access type was wider than a byte (WordAcc, DwordAcc, or
 QwordAcc).
 
 Fields: Fixed a problem where forward references to individual
 FieldUnits (individual Field names within a Field definition) were
 not resolved during the AML table load.
 
 Fields: Fixed a problem where forward references from a Field
 definition to the parent Operation Region definition were not
 resolved during the AML table load.
 
 Fields: Duplicate FieldUnit names within a scope are now detected
 during AML table load.
 
 Acpi Interfaces: Fixed a problem where the AcpiGetName() interface
 returned an incorrect name for the root node.
 
 Code and Data Size: Code and Data optimizations have permitted new
 feature development with an actual reduction in the library size.
 Current core subsystem library sizes are shown below.  These are
 the code and data sizes for the acpica.lib produced by the
 Microsoft Visual C++ 6.0 compiler, and these values do not include
 any ACPI driver or OSPM code.  The debug version of the code
 includes the debug output trace mechanism and has a larger code
 and data size.  Note that these values will vary depending on the
 efficiency of the compiler and the compiler options used during
 generation.
 
   Previous Release (10_18_01):
      Non-Debug Version:  63.9K Code,   5.1K Data,   69.0K Total
      Debug Version:     136.7K Code,  57.4K Data,  194.2K Total
 
   Current Release:
      Non-Debug Version:  63.7K Code,   5.2K Data,   68.9K Total
      Debug Version:     134.5K Code,  55.4K Data,  189.9K Total
 
  2) Linux:
 
 Improved /proc processor output (Pavel Machek) Re-added
 MODULE_LICENSE("GPL") to all modules.
 
  3) ASL Compiler version X2030:
 
 Duplicate FieldUnit names within a scope are now detected and
 flagged as errors.
 
  4) Documentation:
 
 Programmer Reference updated to reflect OSL and address space
 handler interface changes described above.
 
 ----------------------------------------
 Summary of changes for this label: 10_18_01
 
 ACPI CA Core Subsystem:
 
 Fixed a problem with the internal object reference count mechanism
 that occasionally caused premature object deletion. This resolves
 all of the outstanding problem reports where an object is deleted
 in the middle of an interpreter evaluation.  Although this problem
 only showed up in rather obscure cases, the solution to the
 problem involved an adjustment of all reference counts involving
 objects attached to namespace nodes.
 
 Fixed a problem with Field support in the interpreter where
 writing to an aligned field whose length is an exact multiple (2
 or greater) of the field access granularity would cause an attempt
 to write beyond the end of the field.
 
 The top level AML opcode execution functions within the
 interpreter have been renamed with a more meaningful and
 consistent naming convention.  The modules exmonad.c and
 exdyadic.c were eliminated.  New modules are exoparg1.c,
 exoparg2.c, exoparg3.c, and exoparg6.c.
 
 Support for the ACPI 2.0 "Mid" ASL operator has been implemented.
 
 Fixed a problem where the AML debugger was causing some internal
 objects to not be deleted during subsystem termination.
 
 Fixed a problem with the external AcpiEvaluateObject interface
 where the subsystem would fault if the named object to be
 evaluated referred to a constant such as Zero, Ones, etc.
 
 Fixed a problem with IndexFields and BankFields where the
 subsystem would fault if the index, data, or bank registers were
 not defined in the same scope as the field itself.
 
 Added printf format string checking for compilers that support
 this feature.  Corrected more than 50 instances of issues with
 format specifiers within invocations of ACPI_DEBUG_PRINT
 throughout the core subsystem code.
 
 The ASL "Revision" operator now returns the ACPI support level
 implemented in the core - the value "2" since the ACPI 2.0 support
 is more than 50% implemented.
 
 Enhanced the output of the AML debugger "dump namespace" command
 to output in a more human-readable form.
 
 Current core subsystem library code sizes are shown below.  These
 
 are the code and data sizes for the acpica.lib produced by the
 Microsoft Visual C++ 6.0 compiler, and these values do not include
 any ACPI driver or OSPM code.  The debug version of the code
 includes the full debug trace mechanism -- leading to a much
 
 larger code and data size.  Note that these values will vary
 depending on the efficiency of the compiler and the compiler
 options used during generation.
 
      Previous Label (09_20_01):
      Non-Debug Version:    65K Code,     5K Data,     70K Total
      Debug Version:       138K Code,    58K Data,    196K Total
 
      This Label:
 
      Non-Debug Version:  63.9K Code,   5.1K Data,   69.0K Total
      Debug Version:     136.7K Code,  57.4K Data,  194.2K Total
 
 Linux:
 
 Implemented a "Bad BIOS Blacklist" to track machines that have
 known ASL/AML problems.
 
 Enhanced the /proc interface for the thermal zone driver and added
 support for _HOT (the critical suspend trip point).  The 'info'
 file now includes threshold/policy information, and allows setting
 of _SCP (cooling preference) and _TZP (polling frequency) values
 to the 'info' file. Examples: "echo tzp=5 > info" sets the polling
 frequency to 5 seconds, and "echo scp=1 > info" sets the cooling
 preference to the passive/quiet mode (if supported by the ASL).
 
 Implemented a workaround for a gcc bug that resuted in an OOPs
 when loading the control method battery driver.
 
  ----------------------------------------
 Summary of changes for this label: 09_20_01
 
  ACPI CA Core Subsystem:
 
 The AcpiEnableEvent and AcpiDisableEvent interfaces have been
 modified to allow individual GPE levels to be flagged as wake-
 enabled (i.e., these GPEs are to remain enabled when the platform
 sleeps.)
 
 The AcpiEnterSleepState and AcpiLeaveSleepState interfaces now
 support wake-enabled GPEs.  This means that upon entering the
 sleep state, all GPEs that are not wake-enabled are disabled.
 When leaving the sleep state, these GPEs are re-enabled.
 
 A local double-precision divide/modulo module has been added to
 enhance portability to OS kernels where a 64-bit math library is
 not available.  The new module is "utmath.c".
 
 Several optimizations have been made to reduce the use of CPU
 stack.  Originally over 2K, the maximum stack usage is now below
 2K at 1860  bytes (1.82k)
 
 Fixed a problem with the AcpiGetFirmwareTable interface where the
 root table pointer was not mapped into a logical address properly.
 
 Fixed a problem where a NULL pointer was being dereferenced in the
 interpreter code for the ASL Notify operator.
 
 Fixed a problem where the use of the ASL Revision operator
 returned an error. This operator now returns the current version
 of the ACPI CA core subsystem.
 
 Fixed a problem where objects passed as control method parameters
 to AcpiEvaluateObject were always deleted at method termination.
 However, these objects may end up being stored into the namespace
 by the called method.  The object reference count mechanism was
 applied to these objects instead of a force delete.
 
 Fixed a problem where static strings or buffers (contained in the
 AML code) that are declared as package elements within the ASL
 code could cause a fault because the interpreter would attempt to
 delete them.  These objects are now marked with the "static
 object" flag to prevent any attempt to delete them.
 
 Implemented an interpreter optimization to use operands directly
 from the state object instead of extracting the operands to local
 variables.  This reduces stack use and code size, and improves
 performance.
 
 The module exxface.c was eliminated as it was an unnecessary extra
 layer of code.
 
 Current core subsystem library code sizes are shown below.  These
 are the code and data sizes for the acpica.lib produced by the
 Microsoft Visual C++ 6.0 compiler, and these values do not include
 any ACPI driver or OSPM code.  The debug version of the code
 includes the full debug trace mechanism -- leading to a much
 larger code and data size.  Note that these values will vary
 depending on the efficiency of the compiler and the compiler
 options used during generation.
 
   Non-Debug Version:  65K Code,   5K Data,   70K Total
 (Previously 69K)   Debug Version:     138K Code,  58K Data,  196K
 Total  (Previously 195K)
 
 Linux:
 
 Support for ACPI 2.0 64-bit integers has been added.   All ACPI
 Integer objects are now 64 bits wide
 
 All Acpi data types and structures are now in lower case.  Only
 Acpi macros are upper case for differentiation.
 
  Documentation:
 
 Changes to the external interfaces as described above.
 
  ----------------------------------------
 Summary of changes for this label: 08_31_01
 
  ACPI CA Core Subsystem:
 
 A bug with interpreter implementation of the ASL Divide operator
 was found and fixed.  The implicit function return value (not the
 explicit store operands) was returning the remainder instead of
 the quotient.  This was a longstanding bug and it fixes several
 known outstanding issues on various platforms.
 
 The ACPI_DEBUG_PRINT and function trace entry/exit macros have
 been further optimized for size.  There are 700 invocations of the
 DEBUG_PRINT macro alone, so each optimization reduces the size of
 the debug version of the subsystem significantly.
 
 A stack trace mechanism has been implemented.  The maximum stack
 usage is about 2K on 32-bit platforms.  The debugger command "stat
 stack" will display the current maximum stack usage.
 
 All public symbols and global variables within the subsystem are
 now prefixed with the string "Acpi".  This keeps all of the
 symbols grouped together in a kernel map, and avoids conflicts
 with other kernel subsystems.
 
 Most of the internal fixed lookup tables have been moved into the
 code segment via the const operator.
 
 Several enhancements have been made to the interpreter to both
 reduce the code size and improve performance.
 
 Current core subsystem library code sizes are shown below.  These
 are the code and data sizes for the acpica.lib produced by the
 Microsoft Visual C++ 6.0 compiler, and these values do not include
 any ACPI driver or OSPM code.  The debug version of the code
 includes the full debug trace mechanism which contains over 700
 invocations of the DEBUG_PRINT macro, 500 function entry macro
 invocations, and over 900 function exit macro invocations --
 leading to a much larger code and data size.  Note that these
 values will vary depending on the efficiency of the compiler and
 the compiler options used during generation.
 
         Non-Debug Version:  64K Code,   5K Data,   69K Total
 Debug Version:     137K Code,  58K Data,  195K Total
 
  Linux:
 
 Implemented wbinvd() macro, pending a kernel-wide definition.
 
 Fixed /proc/acpi/event to handle poll() and short reads.
 
  ASL Compiler, version X2026:
 
 Fixed a problem introduced in the previous label where the AML
 
 code emitted for package objects produced packages with zero
 length.
 
  ----------------------------------------
 Summary of changes for this label: 08_16_01
 
 ACPI CA Core Subsystem:
 
 The following ACPI 2.0 ASL operators have been implemented in the
 AML interpreter (These are already supported by the Intel ASL
 compiler):  ToDecimalString, ToHexString, ToString, ToInteger, and
 ToBuffer.  Support for 64-bit AML constants is implemented in the
 AML parser, debugger, and disassembler.
 
 The internal memory tracking mechanism (leak detection code) has
 been upgraded to reduce the memory overhead (a separate tracking
 block is no longer allocated for each memory allocation), and now
 supports all of the internal object caches.
 
 The data structures and code for the internal object caches have
 been coelesced and optimized so that there is a single cache and
 memory list data structure and a single group of functions that
 implement generic cache management.  This has reduced the code
 size in both the debug and release versions of the subsystem.
 
 The DEBUG_PRINT macro(s) have been optimized for size and replaced
 by ACPI_DEBUG_PRINT.  The syntax for this macro is slightly
 different, because it generates a single call to an internal
 function.  This results in a savings of about 90 bytes per
 invocation, resulting in an overall code and data savings of about
 16% in the debug version of the subsystem.
 
  Linux:
 
 Fixed C3 disk corruption problems and re-enabled C3 on supporting
 machines.
 
 Integrated low-level sleep code by Patrick Mochel.
 
 Further tweaked source code Linuxization.
 
 Other minor fixes.
 
  ASL Compiler:
 
 Support for ACPI 2.0 variable length packages is fixed/completed.
 
 Fixed a problem where the optional length parameter for the ACPI
 2.0 ToString operator.
 
 Fixed multiple extraneous error messages when a syntax error is
 detected within the declaration line of a control method.
 
  ----------------------------------------
 Summary of changes for this label: 07_17_01
 
 ACPI CA Core Subsystem:
 
 Added a new interface named AcpiGetFirmwareTable to obtain any
 ACPI table via the ACPI signature.  The interface can be called at
 any time during kernel initialization, even before the kernel
 virtual memory manager is initialized and paging is enabled.  This
 allows kernel subsystems to obtain ACPI tables very early, even
 before the ACPI CA subsystem is initialized.
 
 Fixed a problem where Fields defined with the AnyAcc attribute
 could be resolved to the incorrect address under the following
 conditions: 1) the field width is larger than 8 bits and 2) the
 parent operation region is not defined on a DWORD boundary.
 
 Fixed a problem where the interpreter is not being locked during
 namespace initialization (during execution of the _INI control
 methods), causing an error when an attempt is made to release it
 later.
 
 ACPI 2.0 support in the AML Interpreter has begun and will be
 ongoing throughout the rest of this year.  In this label, The Mod
 operator is implemented.
 
 Added a new data type to contain full PCI addresses named
 ACPI_PCI_ID. This structure contains the PCI Segment, Bus, Device,
 and Function values.
 
  Linux:
 
 Enhanced the Linux version of the source code to change most
 capitalized ACPI type names to lowercase. For example, all
 instances of ACPI_STATUS are changed to acpi_status.  This will
 result in a large diff, but the change is strictly cosmetic and
 aligns the CA code closer to the Linux coding standard.
 
 OSL Interfaces:
 
 The interfaces to the PCI configuration space have been changed to
 add the PCI Segment number and to split the single 32-bit combined
 DeviceFunction field into two 16-bit fields.  This was
 accomplished by moving the four values that define an address in
 PCI configuration space (segment, bus, device, and function) to
 the new ACPI_PCI_ID structure.
 
 The changes to the PCI configuration space interfaces led to a
 reexamination of the complete set of address space access
 interfaces for PCI, I/O, and Memory.  The previously existing 18
 interfaces have proven difficult to maintain (any small change
 must be propagated across at least 6 interfaces) and do not easily
 allow for future expansion to 64 bits if necessary.  Also, on some
 systems, it would not be appropriate to demultiplex the access
 width (8, 16, 32,or 64) before calling the OSL if the
 corresponding native OS interfaces contain a similar access width
 parameter.  For these reasons, the 18 address space interfaces
 have been replaced by these 6 new ones:
 
 AcpiOsReadPciConfiguration
 AcpiOsWritePciConfiguration
 AcpiOsReadMemory
 AcpiOsWriteMemory
 AcpiOsReadPort
 AcpiOsWritePort
 
 Added a new interface named AcpiOsGetRootPointer to allow the OSL
 to perform the platform and/or OS-specific actions necessary to
 obtain the ACPI RSDP table pointer.  On IA-32 platforms, this
 interface will simply call down to the CA core to perform the low-
 memory search for the table.  On IA-64, the RSDP is obtained from
 EFI.  Migrating this interface to the OSL allows the CA core to
 
 remain OS and platform independent.
 
 Added a new interface named AcpiOsSignal to provide a generic
 "function code and pointer" interface for various miscellaneous
 signals and notifications that must be made to the host OS.   The
 first such signals are intended to support the ASL Fatal and
 Breakpoint operators.  In the latter case, the AcpiOsBreakpoint
 interface has been obsoleted.
 
 The definition of the AcpiFormatException interface has been
 changed to simplify its use.  The caller no longer must supply a
 buffer to the call; A pointer to a const string is now returned
 directly.  This allows the call to be easily used in printf
 statements, etc. since the caller does not have to manage a local
 buffer.
 
 
  ASL Compiler, Version X2025:
 
 The ACPI 2.0 Switch/Case/Default operators have been implemented
 and are fully functional.  They will work with all ACPI 1.0
 interpreters, since the operators are simply translated to If/Else
 pairs.
 
 The ACPI 2.0 ElseIf operator is implemented and will also work
 with 1.0 interpreters, for the same reason.
 
 Implemented support for ACPI 2.0 variable-length packages.  These
 packages have a separate opcode, and their size is determined by
 the interpreter at run-time.
 
 Documentation The ACPI CA Programmer Reference has been updated to
 reflect the new interfaces and changes to existing interfaces.
 
  ------------------------------------------
 Summary of changes for this label: 06_15_01
 
  ACPI CA Core Subsystem:
 
 Fixed a problem where a DWORD-accessed field within a Buffer
 object would get its byte address inadvertently rounded down to
 the nearest DWORD.  Buffers are always Byte-accessible.
 
  ASL Compiler, version X2024:
 
 Fixed a problem where the Switch() operator would either fault or
 hang the compiler.  Note however, that the AML code for this ACPI
 2.0 operator is not yet implemented.
 
 Compiler uses the new AcpiOsGetTimer interface to obtain compile
 timings.
 
 Implementation of the CreateField operator automatically converts
 a reference to a named field within a resource descriptor from a
 byte offset to a bit offset if required.
 
 Added some missing named fields from the resource descriptor
 support. These are the names that are automatically created by the
 compiler to reference fields within a descriptor.  They are only
 valid at compile time and are not passed through to the AML
 interpreter.
 
 Resource descriptor named fields are now typed as Integers and
 subject to compile-time typechecking when used in expressions.
 
  ------------------------------------------
 Summary of changes for this label: 05_18_01
 
  ACPI CA Core Subsystem:
 
 Fixed a couple of problems in the Field support code where bits
 from adjacent fields could be returned along with the proper field
 bits. Restructured the field support code to improve performance,
 readability and maintainability.
 
 New DEBUG_PRINTP macro automatically inserts the procedure name
 into the output, saving hundreds of copies of procedure name
 strings within the source, shrinking the memory footprint of the
 debug version of the core subsystem.
 
  Source Code Structure:
 
 The source code directory tree was restructured to reflect the
 current organization of the component architecture.  Some files
 and directories have been moved and/or renamed.
 
  Linux:
 
 Fixed leaking kacpidpc processes.
 
 Fixed queueing event data even when /proc/acpi/event is not
 opened.
 
  ASL Compiler, version X2020:
 
 Memory allocation performance enhancement - over 24X compile time
 improvement on large ASL files.  Parse nodes and namestring
 buffers are now allocated from a large internal compiler buffer.
 
 The temporary .SRC file is deleted unless the "-s" option is
 specified
 
 The "-d" debug output option now sends all output to the .DBG file
 instead of the console.
 
 "External" second parameter is now optional
 
 "ElseIf" syntax now properly allows the predicate
 
 Last operand to "Load" now recognized as a Target operand
 
 Debug object can now be used anywhere as a normal object.
 
 ResourceTemplate now returns an object of type BUFFER
 
 EISAID now returns an object of type INTEGER
 
 "Index" now works with a STRING operand
 
 "LoadTable" now accepts optional parameters
 
 "ToString" length parameter is now optional
 
 "Interrupt (ResourceType," parse error fixed.
 
 "Register" with a user-defined region space parse error fixed
 
 Escaped backslash at the end of a string ("\\") scan/parse error
 fixed
 
 "Revision" is now an object of type INTEGER.
 
 
 
 ------------------------------------------
 Summary of changes for this label: 05_02_01
 
 Linux:
 
 /proc/acpi/event now blocks properly.
 
 Removed /proc/sys/acpi. You can still dump your DSDT from
 /proc/acpi/dsdt.
 
  ACPI CA Core Subsystem:
 
 Fixed a problem introduced in the previous label where some of the
 "small" resource descriptor types were not recognized.
 
 Improved error messages for the case where an ASL Field is outside
 the range of the parent operation region.
 
  ASL Compiler, version X2018:
 
 
 Added error detection for ASL Fields that extend beyond the length
 of the parent operation region (only if the length of the region
 is known at compile time.)  This includes fields that have a
 minimum access width that is smaller than the parent region, and
 individual field units that are partially or entirely beyond the
 extent of the parent.
 
 
 
 ------------------------------------------
 Summary of changes for this label: 04_27_01
 
  ACPI CA Core Subsystem:
 
 Fixed a problem where the namespace mutex could be released at the
 wrong time during execution of AcpiRemoveAddressSpaceHandler.
 
 Added optional thread ID output for debug traces, to simplify
 debugging of multiple threads.  Added context switch notification
 when the debug code realizes that a different thread is now
 executing ACPI code.
 
 Some additional external data types have been prefixed with the
 string "ACPI_" for consistency.  This may effect existing code.
 The data types affected are the external callback typedefs - e.g.,
 
 WALK_CALLBACK becomes ACPI_WALK_CALLBACK.
 
  Linux:
 
 Fixed an issue with the OSL semaphore implementation where a
 thread was waking up with an error from receiving a SIGCHLD
 signal.
 
 Linux version of ACPI CA now uses the system C library for string
 manipulation routines instead of a local implementation.
 
 Cleaned up comments and removed TBDs.
 
  ASL Compiler, version X2017:
 
 Enhanced error detection and reporting for all file I/O
 operations.
 
  Documentation:
 
 Programmer Reference updated to version 1.06.
 
 
 
 ------------------------------------------
 Summary of changes for this label: 04_13_01
 
  ACPI CA Core Subsystem:
 
 Restructured support for BufferFields and RegionFields.
 BankFields support is now fully operational.  All known 32-bit
 limitations on field sizes have been removed.  Both BufferFields
 and (Operation) RegionFields are now supported by the same field
 management code.
 
 Resource support now supports QWORD address and IO resources. The
 16/32/64 bit address structures and the Extended IRQ structure
 have been changed to properly handle Source Resource strings.
 
 A ThreadId of -1 is now used to indicate a "mutex not acquired"
 condition internally and must never be returned by AcpiOsThreadId.
 This reserved value was changed from 0 since Unix systems allow a
 thread ID of 0.
 
 Linux:
 
 Driver code reorganized to enhance portability
 
 Added a kernel configuration option to control ACPI_DEBUG
 
 Fixed the EC driver to honor _GLK.
 
 ASL Compiler, version X2016:
 
 Fixed support for the "FixedHw" keyword.  Previously, the FixedHw
 address space was set to 0, not 0x7f as it should be.
 
  ------------------------------------------
 Summary of changes for this label: 03_13_01
 
  ACPI CA Core Subsystem:
 
 During ACPI initialization, the _SB_._INI method is now run if
 present.
 
 Notify handler fix - notifies are deferred until the parent method
 completes execution.  This fixes the "mutex already acquired"
 issue seen occasionally.
 
 Part of the "implicit conversion" rules in ACPI 2.0 have been
 found to cause compatibility problems with existing ASL/AML.  The
 convert "result-to-target-type" implementation has been removed
 for stores to method Args and Locals.  Source operand conversion
 is still fully implemented.  Possible changes to ACPI 2.0
 specification pending.
 
 Fix to AcpiRsCalculatePciRoutingTableLength to return correct
 length.
 
 Fix for compiler warnings for 64-bit compiles.
 
  Linux:
 
 /proc output aligned for easier parsing.
 
 Release-version compile problem fixed.
 
 New kernel configuration options documented in Configure.help.
 
 IBM 600E - Fixed Sleep button may generate "Invalid <NULL>
 context" message.
 
  OSPM:
 
 Power resource driver integrated with bus manager.
 
 Fixed kernel fault during active cooling for thermal zones.
 
 Source Code:
 
 The source code tree has been restructured.
 
 
 
 ------------------------------------------
 Summary of changes for this label: 03_02_01
 
  Linux OS Services Layer (OSL):
 
 Major revision of all Linux-specific code.
 
 Modularized all ACPI-specific drivers.
 
 Added new thermal zone and power resource drivers.
 
 Revamped /proc interface (new functionality is under /proc/acpi).
 
 New kernel configuration options.
 
  Linux known issues:
 
 New kernel configuration options not documented in Configure.help
 yet.
 
 
 Module dependencies not currently implemented. If used, they
 should be loaded in this order: busmgr, power, ec, system,
 processor, battery, ac_adapter, button, thermal.
 
 Modules will not load if CONFIG_MODVERSION is set.
 
 IBM 600E - entering S5 may reboot instead of shutting down.
 
 IBM 600E - Sleep button may generate "Invalid <NULL> context"
 message.
 
 Some systems may fail with "execution mutex already acquired"
 message.
 
  ACPI CA Core Subsystem:
 
 Added a new OSL Interface, AcpiOsGetThreadId.  This was required
 for the  deadlock detection code. Defined to return a non-zero, 32-
 bit thread ID for the currently executing thread.  May be a non-
 zero constant integer on single-thread systems.
 
 Implemented deadlock detection for internal subsystem mutexes.  We
 may add conditional compilation for this code (debug only) later.
 
 ASL/AML Mutex object semantics are now fully supported.  This
 includes multiple acquires/releases by owner and support for the
 
 Mutex SyncLevel parameter.
 
 A new "Force Release" mechanism automatically frees all ASL
 Mutexes that have been acquired but not released when a thread
 exits the interpreter.  This forces conformance to the ACPI spec
 ("All mutexes must be released when an invocation exits") and
 prevents deadlocked ASL threads.  This mechanism can be expanded
 (later) to monitor other resource acquisitions if OEM ASL code
 continues to misbehave (which it will).
 
 Several new ACPI exception codes have been added for the Mutex
 support.
 
 Recursive method calls are now allowed and supported (the ACPI
 spec does in fact allow recursive method calls.)  The number of
 recursive calls is subject to the restrictions imposed by the
 SERIALIZED method keyword and SyncLevel (ACPI 2.0) method
 parameter.
 
 Implemented support for the SyncLevel parameter for control
 methods (ACPI 2.0 feature)
 
 Fixed a deadlock problem when multiple threads attempted to use
 the interpreter.
 
 Fixed a problem where the string length of a String package
 element was not always set in a package returned from
 AcpiEvaluateObject.
 
 Fixed a problem where the length of a String package element was
 not always included in the length of the overall package returned
 from AcpiEvaluateObject.
 
 Added external interfaces (Acpi*) to the ACPI debug memory
 manager.  This manager keeps a list of all outstanding
 allocations, and can therefore detect memory leaks and attempts to
 free memory blocks more than once. Useful for code such as the
 power manager, etc.  May not be appropriate for device drivers.
 Performance with the debug code enabled is slow.
 
 The ACPI Global Lock is now an optional hardware element.
 
  ASL Compiler Version X2015:
 
 Integrated changes to allow the compiler to be generated on
 multiple platforms.
 
 Linux makefile added to generate the compiler on Linux
 
  Source Code:
 
 All platform-specific headers have been moved to their own
 subdirectory, Include/Platform.
 
 New source file added, Interpreter/ammutex.c
 
 New header file, Include/acstruct.h
 
  Documentation:
 
 The programmer reference has been updated for the following new
 interfaces: AcpiOsGetThreadId AcpiAllocate AcpiCallocate AcpiFree
 
  ------------------------------------------
 Summary of changes for this label: 02_08_01
 
 Core ACPI CA Subsystem: Fixed a problem where an error was
 incorrectly returned if the return resource buffer was larger than
 the actual data (in the resource interfaces).
 
 References to named objects within packages are resolved to the
 
 full pathname string before packages are returned directly (via
 the AcpiEvaluateObject interface) or indirectly via the resource
 interfaces.
 
 Linux OS Services Layer (OSL):
 
 Improved /proc battery interface.
 
 
 Added C-state debugging output and other miscellaneous fixes.
 
 ASL Compiler Version X2014:
 
 All defined method arguments can now be used as local variables,
 including the ones that are not actually passed in as parameters.
 The compiler tracks initialization of the arguments and issues an
 exception if they are used without prior assignment (just like
 locals).
 
 The -o option now specifies a filename prefix that is used for all
 output files, including the AML output file.  Otherwise, the
 default behavior is as follows:  1) the AML goes to the file
 specified in the DSDT.  2) all other output files use the input
 source filename as the base.
 
  ------------------------------------------
 Summary of changes for this label: 01_25_01
 
 Core ACPI CA Subsystem: Restructured the implementation of object
 store support within the  interpreter.  This includes support for
 the Store operator as well  as any ASL operators that include a
 target operand.
 
 Partially implemented support for Implicit Result-to-Target
 conversion. This is when a result object is converted on the fly
 to the type of  an existing target object.  Completion of this
 support is pending  further analysis of the ACPI specification
 concerning this matter.
 
 CPU-specific code has been removed from the subsystem (hardware
 directory).
 
 New Power Management Timer functions added
 
 Linux OS Services Layer (OSL): Moved system state transition code
 to the core, fixed it, and modified  Linux OSL accordingly.
 
 Fixed C2 and C3 latency calculations.
 
 
 We no longer use the compilation date for the version message on
 initialization, but retrieve the version from AcpiGetSystemInfo().
 
 Incorporated for fix Sony VAIO machines.
 
 Documentation:  The Programmer Reference has been updated and
 reformatted.
 
 
 ASL Compiler:  Version X2013: Fixed a problem where the line
 numbering and error reporting could get out  of sync in the
 presence of multiple include files.
 
  ------------------------------------------
 Summary of changes for this label: 01_15_01
 
 Core ACPI CA Subsystem:
 
 Implemented support for type conversions in the execution of the
 ASL  Concatenate operator (The second operand is converted to
 match the type  of the first operand before concatenation.)
 
 Support for implicit source operand conversion is partially
 implemented.   The ASL source operand types Integer, Buffer, and
 String are freely  interchangeable for most ASL operators and are
 converted by the interpreter  on the fly as required.  Implicit
 Target operand conversion (where the  result is converted to the
 target type before storing) is not yet implemented.
 
 Support for 32-bit and 64-bit BCD integers is implemented.
 
 Problem fixed where a field read on an aligned field could cause a
 read  past the end of the field.
 
 New exception, AE_AML_NO_RETURN_VALUE, is returned when a method
 does not return a value, but the caller expects one.  (The ASL
 compiler flags this as a warning.)
 
 ASL Compiler:
 
 Version X2011:
 1. Static typechecking of all operands is implemented. This
 prevents the use of invalid objects (such as using a Package where
 an Integer is required) at compile time instead of at interpreter
 run-time.
 2. The ASL source line is printed with ALL errors and warnings.
 3. Bug fix for source EOF without final linefeed.
 4. Debug option is split into a parse trace and a namespace trace.
 5. Namespace output option (-n) includes initial values for
 integers and strings.
 6. Parse-only option added for quick syntax checking.
 7. Compiler checks for duplicate ACPI name declarations
 
 Version X2012:
 1. Relaxed typechecking to allow interchangeability between
 strings, integers, and buffers.  These types are now converted by
 the interpreter at runtime.
 2. Compiler reports time taken by each internal subsystem in the
 debug         output file.
 
 
  ------------------------------------------
 Summary of changes for this label: 12_14_00
 
 ASL Compiler:
 
 This is the first official release of the compiler. Since the
 compiler requires elements of the Core Subsystem, this label
 synchronizes everything.
 
 ------------------------------------------
 Summary of changes for this label: 12_08_00
 
 
 Fixed a problem where named references within the ASL definition
 of both OperationRegions and CreateXXXFields did not work
 properly.  The symptom was an AE_AML_OPERAND_TYPE during
 initialization of the region/field. This is similar (but not
 related internally) to the problem that was fixed in the last
 label.
 
 Implemented both 32-bit and 64-bit support for the BCD ASL
 functions ToBCD and FromBCD.
 
 Updated all legal headers to include "2000" in the copyright
 years.
 
  ------------------------------------------
 Summary of changes for this label: 12_01_00
 
 Fixed a problem where method invocations within the ASL definition
 of both OperationRegions and CreateXXXFields did not work
 properly.  The symptom was an AE_AML_OPERAND_TYPE during
 initialization of the region/field:
 
   nsinit-0209: AE_AML_OPERAND_TYPE while getting region arguments
 [DEBG]   ammonad-0284: Exec_monadic2_r/Not: bad operand(s)
 (0x3005)
 
 Fixed a problem where operators with more than one nested
 subexpression would fail.  The symptoms were varied, by mostly
 AE_AML_OPERAND_TYPE errors.  This was actually a rather serious
 problem that has gone unnoticed until now.
 
   Subtract (Add (1,2), Multiply (3,4))
 
 Fixed a problem where AcpiGetHandle didn't quite get fixed in the
 previous build (The prefix part of a relative path was handled
 incorrectly).
 
 Fixed a problem where Operation Region initialization failed if
 the operation region name was a "namepath" instead of a simple
 "nameseg". Symptom was an AE_NO_OPERAND error.
 
 Fixed a problem where an assignment to a local variable via the
 indirect RefOf mechanism only worked for the first such
 assignment.  Subsequent assignments were ignored.
 
  ------------------------------------------
 Summary of changes for this label: 11_15_00
 
 ACPI 2.0 table support with backwards support for ACPI 1.0 and the
 0.71 extensions.  Note: although we can read ACPI 2.0 BIOS tables,
 the AML  interpreter does NOT have support for the new 2.0 ASL
 grammar terms at this time.
 
 All ACPI hardware access is via the GAS structures in the ACPI 2.0
 FADT.
 
 All physical memory addresses across all platforms are now 64 bits
 wide. Logical address width remains dependent on the platform
 (i.e., "void *").
 
 AcpiOsMapMemory interface changed to a 64-bit physical address.
 
 The AML interpreter integer size is now 64 bits, as per the ACPI
 2.0 specification.
 
 For backwards compatibility with ACPI 1.0, ACPI tables with a
 revision number less than 2 use 32-bit integers only.
 
 Fixed a problem where the evaluation of OpRegion operands did not
 always resolve them to numbers properly.
 
 ------------------------------------------
 Summary of changes for this label: 10_20_00
 
 Fix for CBN_._STA issue.  This fix will allow correct access to
 CBN_ OpRegions when the _STA returns 0x8.
 
 Support to convert ACPI constants (Ones, Zeros, One) to actual
 values before a package object is returned
 
 Fix for method call as predicate to if/while construct causing
 incorrect if/while behavior
 
 Fix for Else block package lengths sometimes calculated wrong (if
 block > 63 bytes)
 
 Fix for Processor object length field, was always zero
 
 Table load abort if FACP sanity check fails
 
 Fix for problem with Scope(name) if name already exists
 
 Warning emitted if a named object referenced cannot be found
 (resolved) during method execution.
 
 
 
 
 
 ------------------------------------------
 Summary of changes for this label: 9_29_00
 
 New table initialization interfaces: AcpiInitializeSubsystem no
 longer has any parameters AcpiFindRootPointer - Find the RSDP (if
 necessary) AcpiLoadTables (RSDP) - load all tables found at RSDP-
 >RSDT Obsolete Interfaces AcpiLoadFirmwareTables - replaced by
 AcpiLoadTables
 
 Note: These interface changes require changes to all existing OSDs
 
 The PCI_Config default address space handler is always installed
 at the root namespace object.
 
 -------------------------------------------
 Summary of changes for this label: 09_15_00
 
 The new initialization architecture is implemented.  New
 interfaces are: AcpiInitializeSubsystem (replaces AcpiInitialize)
 AcpiEnableSubsystem Obsolete Interfaces: AcpiLoadNamespace
 
 (Namespace is automatically loaded when a table is loaded)
 
 The ACPI_OPERAND_OBJECT has been optimized to shrink its size from
 52 bytes to 32 bytes.  There is usually one of these for every
 namespace object, so the memory savings is significant.
 
 Implemented just-in-time evaluation of the CreateField operators.
 
 Bug fixes for IA-64 support have been integrated.
 
 Additional code review comments have been implemented
 
 The so-called "third pass parse" has been replaced by a final walk
 through the namespace to initialize all operation regions (address
 spaces) and fields that have not yet been initialized during the
 execution of the various _INI and REG methods.
 
 New file - namespace/nsinit.c
 
 -------------------------------------------
 Summary of changes for this label: 09_01_00
 
 Namespace manager data structures have been reworked to change the
 primary  object from a table to a single object.  This has
 resulted in dynamic memory  savings of 3X within the namespace and
 2X overall in the ACPI CA subsystem.
 
 Fixed problem where the call to AcpiEvFindPciRootBuses was
 inadvertently left  commented out.
 
 Reduced the warning count when generating the source with the GCC
 compiler.
 
 Revision numbers added to each module header showing the
 SourceSafe version of the file.  Please refer to this version
 number when giving us feedback or comments on individual modules.
 
 The main object types within the subsystem have been renamed to
 clarify their  purpose:
 
 ACPI_INTERNAL_OBJECT -> ACPI_OPERAND_OBJECT
 ACPI_GENERIC_OP -> ACPI_PARSE_OBJECT
 ACPI_NAME_TABLE_ENTRY -> ACPI_NAMESPACE_NODE
 
 NOTE: no changes to the initialization sequence are included in
 this label.
 
 -------------------------------------------
 Summary of changes for this label: 08_23_00
 
 Fixed problem where TerminateControlMethod was being called
 multiple times per  method
 
 Fixed debugger problem where single stepping caused a semaphore to
 be  oversignalled
 
 Improved performance through additional parse object caching -
 added  ACPI_EXTENDED_OP type
 
 -------------------------------------------
 Summary of changes for this label: 08_10_00
 
 Parser/Interpreter integration:  Eliminated the creation of
 complete parse trees  for ACPI tables and control methods.
 Instead, parse subtrees are created and  then deleted as soon as
 they are processed (Either entered into the namespace or  executed
 by the interpreter).  This reduces the use of dynamic kernel
 memory  significantly. (about 10X)
 
 Exception codes broken into classes and renumbered.  Be sure to
 recompile all  code that includes acexcep.h.  Hopefully we won't
 have to renumber the codes  again now that they are split into
 classes (environment, programmer, AML code,  ACPI table, and
 internal).
 
 Fixed some additional alignment issues in the Resource Manager
 subcomponent
 
 Implemented semaphore tracking in the AcpiExec utility, and fixed
 several places  where mutexes/semaphores were being unlocked
 without a corresponding lock  operation.  There are no known
 semaphore or mutex "leaks" at this time.
 
 Fixed the case where an ASL Return operator is used to return an
 unnamed  package.
 
 -------------------------------------------
 Summary of changes for this label: 07_28_00
 
 Fixed a problem with the way addresses were calculated in
 AcpiAmlReadFieldData()  and AcpiAmlWriteFieldData(). This problem
 manifested itself when a Field was  created with WordAccess or
 DwordAccess, but the field unit defined within the  Field was less
 
 than a Word or Dword.
 
 Fixed a problem in AmlDumpOperands() module's loop to pull
 operands off of the  operand stack to display information. The
 problem manifested itself as a TLB  error on 64-bit systems when
 accessing an operand stack with two or more  operands.
 
 Fixed a problem with the PCI configuration space handlers where
 context was  getting confused between accesses. This required a
 change to the generic address  space handler and address space
 setup definitions. Handlers now get both a  global handler context
 (this is the one passed in by the user when executing
 AcpiInstallAddressSpaceHandler() and a specific region context
 that is unique to  each region (For example, the _ADR, _SEG and
 _BBN values associated with a  specific region). The generic
 function definitions have changed to the  following:
 
 typedef ACPI_STATUS (*ADDRESS_SPACE_HANDLER) ( UINT32 Function,
 UINT32 Address, UINT32 BitWidth, UINT32 *Value, void
 *HandlerContext, // This used to be void *Context void
 *RegionContext); // This is an additional parameter
 
 typedef ACPI_STATUS (*ADDRESS_SPACE_SETUP) ( ACPI_HANDLE
 RegionHandle, UINT32 Function, void *HandlerContext,  void
 **RegionContext); // This used to be **ReturnContext
 
 -------------------------------------------
 Summary of changes for this label: 07_21_00
 
 Major file consolidation and rename.  All files within the
 interpreter have been  renamed as well as most header files.  This
 was done to prevent collisions with  existing files in the host
 OSs -- filenames such as "config.h" and "global.h"  seem to be
 quite common.  The VC project files have been updated.  All
 makefiles  will require modification.
 
 The parser/interpreter integration continues in Phase 5 with the
 implementation  of a complete 2-pass parse (the AML is parsed
 twice) for each table;  This  avoids the construction of a huge
 parse tree and therefore reduces the amount of  dynamic memory
 required by the subsystem.  Greater use of the parse object cache
 means that performance is unaffected.
 
 Many comments from the two code reviews have been rolled in.
 
 The 64-bit alignment support is complete.
 
 -------------------------------------------
 Summary of changes for this label: 06_30_00
 
 With a nod and a tip of the hat to the technology of yesteryear,
 we've added  support in the source code for 80 column output
 devices.  The code is now mostly  constrained to 80 columns or
 less to support environments and editors that 1)  cannot display
 or print more than 80 characters on a single line, and 2) cannot
 disable line wrapping.
 
 A major restructuring of the namespace data structure has been
 completed.  The  result is 1) cleaner and more
 understandable/maintainable code, and 2) a  significant reduction
 in the dynamic memory requirement for each named ACPI  object
 (almost half).
 
 -------------------------------------------
 Summary of changes for this label: 06_23_00
 
 Linux support has been added.  In order to obtain approval to get
 the ACPI CA  subsystem into the Linux kernel, we've had to make
 quite a few changes to the  base subsystem that will affect all
 users (all the changes are generic and OS- independent).  The
 effects of these global changes have been somewhat far  reaching.
 Files have been merged and/or renamed and interfaces have been
 renamed.   The major changes are described below.
 
 Osd* interfaces renamed to AcpiOs* to eliminate namespace
 pollution/confusion  within our target kernels.  All OSD
 interfaces must be modified to match the new  naming convention.
 
 Files merged across the subsystem.  A number of the smaller source
 and header  files have been merged to reduce the file count and
 increase the density of the  existing files.  There are too many
 to list here.  In general, makefiles that  call out individual
 files will require rebuilding.
 
 Interpreter files renamed.  All interpreter files now have the
 prefix am*  instead of ie* and is*.
 
 Header files renamed:  The acapi.h file is now acpixf.h.  The
 acpiosd.h file is  now acpiosxf.h.  We are removing references to
 the acronym "API" since it is  somewhat windowsy. The new name is
 "external interface" or xface or xf in the  filenames.j
 
 
 All manifest constants have been forced to upper case (some were
 mixed case.)   Also, the string "ACPI_" has been prepended to many
 (not all) of the constants,  typedefs, and structs.
 
 The globals "DebugLevel" and "DebugLayer" have been renamed
 "AcpiDbgLevel" and  "AcpiDbgLayer" respectively.
 
 All other globals within the subsystem are now prefixed with
 "AcpiGbl_" Internal procedures within the subsystem are now
 prefixed with "Acpi" (with only  a few exceptions).  The original
 two-letter abbreviation for the subcomponent  remains after "Acpi"
 - for example, CmCallocate became AcpiCmCallocate.
 
 Added a source code translation/conversion utility.  Used to
 generate the Linux  source code, it can be modified to generate
 other types of source as well. Can  also be used to cleanup
 existing source by removing extraneous spaces and blank  lines.
 Found in tools/acpisrc/*
 
 OsdUnMapMemory was renamed to OsdUnmapMemory and then
 AcpiOsUnmapMemory.  (UnMap  became Unmap).
 
 A "MaxUnits" parameter has been added to AcpiOsCreateSemaphore.
 When set to  one, this indicates that the caller wants to use the
 
 semaphore as a mutex, not a  counting semaphore.  ACPI CA uses
 both types.  However, implementers of this  call may want to use
 different OS primitives depending on the type of semaphore
 requested.  For example, some operating systems provide separate
 
 "mutex" and  "semaphore" interfaces - where the mutex interface is
 much faster because it  doesn't have all the overhead of a full
 semaphore implementation.
 
 Fixed a deadlock problem where a method that accesses the PCI
 address space can  block forever if it is the first access to the
 space.
 
 -------------------------------------------
 Summary of changes for this label: 06_02_00
 
 Support for environments that cannot handle unaligned data
 accesses (e.g.  firmware and OS environments devoid of alignment
 handler technology namely  SAL/EFI and the IA-64 Linux kernel) has
 been added (via configurable macros) in  these three areas: -
 Transfer of data from the raw AML byte stream is done via byte
 moves instead of    word/dword/qword moves. - External objects are
 aligned within the user buffer, including package   elements (sub-
 objects). - Conversion of name strings to UINT32 Acpi Names is now
 done byte-wise.
 
 The Store operator was modified to mimic Microsoft's
 implementation when storing  to a Buffer Field.
 
 Added a check of the BM_STS bit before entering C3.
 
 The methods subdirectory has been obsoleted and removed.  A new
 file, cmeval.c  subsumes the functionality.
 
 A 16-bit (DOS) version of AcpiExec has been developed.  The
 makefile is under  the acpiexec directory.