FreeBSD/Linux Kernel Cross Reference
sys/contrib/dev/acpica/include/acobject.h

     /******************************************************************************
      *
      * Name: acobject.h - Definition of ACPI_OPERAND_OBJECT  (Internal object only)
      *
      *****************************************************************************/
     
     /******************************************************************************
      *
      * 1. Copyright Notice
     *
     * Some or all of this work - Copyright (c) 1999 - 2022, Intel Corp.
     * All rights reserved.
     *
     * 2. License
     *
     * 2.1. This is your license from Intel Corp. under its intellectual property
     * rights. You may have additional license terms from the party that provided
     * you this software, covering your right to use that party's intellectual
     * property rights.
     *
     * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
     * copy of the source code appearing in this file ("Covered Code") an
     * irrevocable, perpetual, worldwide license under Intel's copyrights in the
     * base code distributed originally by Intel ("Original Intel Code") to copy,
     * make derivatives, distribute, use and display any portion of the Covered
     * Code in any form, with the right to sublicense such rights; and
     *
     * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
     * license (with the right to sublicense), under only those claims of Intel
     * patents that are infringed by the Original Intel Code, to make, use, sell,
     * offer to sell, and import the Covered Code and derivative works thereof
     * solely to the minimum extent necessary to exercise the above copyright
     * license, and in no event shall the patent license extend to any additions
     * to or modifications of the Original Intel Code. No other license or right
     * is granted directly or by implication, estoppel or otherwise;
     *
     * The above copyright and patent license is granted only if the following
     * conditions are met:
     *
     * 3. Conditions
     *
     * 3.1. Redistribution of Source with Rights to Further Distribute Source.
     * Redistribution of source code of any substantial portion of the Covered
     * Code or modification with rights to further distribute source must include
     * the above Copyright Notice, the above License, this list of Conditions,
     * and the following Disclaimer and Export Compliance provision. In addition,
     * Licensee must cause all Covered Code to which Licensee contributes to
     * contain a file documenting the changes Licensee made to create that Covered
     * Code and the date of any change. Licensee must include in that file the
     * documentation of any changes made by any predecessor Licensee. Licensee
     * must include a prominent statement that the modification is derived,
     * directly or indirectly, from Original Intel Code.
     *
     * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
     * Redistribution of source code of any substantial portion of the Covered
     * Code or modification without rights to further distribute source must
     * include the following Disclaimer and Export Compliance provision in the
     * documentation and/or other materials provided with distribution. In
     * addition, Licensee may not authorize further sublicense of source of any
     * portion of the Covered Code, and must include terms to the effect that the
     * license from Licensee to its licensee is limited to the intellectual
     * property embodied in the software Licensee provides to its licensee, and
     * not to intellectual property embodied in modifications its licensee may
     * make.
     *
     * 3.3. Redistribution of Executable. Redistribution in executable form of any
     * substantial portion of the Covered Code or modification must reproduce the
     * above Copyright Notice, and the following Disclaimer and Export Compliance
     * provision in the documentation and/or other materials provided with the
     * distribution.
     *
     * 3.4. Intel retains all right, title, and interest in and to the Original
     * Intel Code.
     *
     * 3.5. Neither the name Intel nor any other trademark owned or controlled by
     * Intel shall be used in advertising or otherwise to promote the sale, use or
     * other dealings in products derived from or relating to the Covered Code
     * without prior written authorization from Intel.
     *
     * 4. Disclaimer and Export Compliance
     *
     * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
     * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
     * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
     * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
     * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
     * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
     * PARTICULAR PURPOSE.
     *
     * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
     * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
     * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
     * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
     * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
     * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
     * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
     * LIMITED REMEDY.
     *
     * 4.3. Licensee shall not export, either directly or indirectly, any of this
    * software or system incorporating such software without first obtaining any
    * required license or other approval from the U. S. Department of Commerce or
    * any other agency or department of the United States Government. In the
    * event Licensee exports any such software from the United States or
    * re-exports any such software from a foreign destination, Licensee shall
    * ensure that the distribution and export/re-export of the software is in
    * compliance with all laws, regulations, orders, or other restrictions of the
    * U.S. Export Administration Regulations. Licensee agrees that neither it nor
    * any of its subsidiaries will export/re-export any technical data, process,
    * software, or service, directly or indirectly, to any country for which the
    * United States government or any agency thereof requires an export license,
    * other governmental approval, or letter of assurance, without first obtaining
    * such license, approval or letter.
    *
    *****************************************************************************
    *
    * Alternatively, you may choose to be licensed under the terms of the
    * following license:
    *
    * Redistribution and use in source and binary forms, with or without
    * modification, are permitted provided that the following conditions
    * are met:
    * 1. Redistributions of source code must retain the above copyright
    *    notice, this list of conditions, and the following disclaimer,
    *    without modification.
    * 2. Redistributions in binary form must reproduce at minimum a disclaimer
    *    substantially similar to the "NO WARRANTY" disclaimer below
    *    ("Disclaimer") and any redistribution must be conditioned upon
    *    including a substantially similar Disclaimer requirement for further
    *    binary redistribution.
    * 3. Neither the names of the above-listed copyright holders nor the names
    *    of any contributors may be used to endorse or promote products derived
    *    from this software without specific prior written permission.
    *
    * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
    * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
    * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
    * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
    * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
    * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
    * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
    * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
    * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
    * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
    * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    *
    * Alternatively, you may choose to be licensed under the terms of the
    * GNU General Public License ("GPL") version 2 as published by the Free
    * Software Foundation.
    *
    *****************************************************************************/
   
   #ifndef _ACOBJECT_H
   #define _ACOBJECT_H
   
   /* acpisrc:StructDefs -- for acpisrc conversion */
   
   
   /*
    * The ACPI_OPERAND_OBJECT is used to pass AML operands from the dispatcher
    * to the interpreter, and to keep track of the various handlers such as
    * address space handlers and notify handlers. The object is a constant
    * size in order to allow it to be cached and reused.
    *
    * Note: The object is optimized to be aligned and will not work if it is
    * byte-packed.
    */
   #if ACPI_MACHINE_WIDTH == 64
   #pragma pack(8)
   #else
   #pragma pack(4)
   #endif
   
   /*******************************************************************************
    *
    * Common Descriptors
    *
    ******************************************************************************/
   
   /*
    * Common area for all objects.
    *
    * DescriptorType is used to differentiate between internal descriptors, and
    * must be in the same place across all descriptors
    *
    * Note: The DescriptorType and Type fields must appear in the identical
    * position in both the ACPI_NAMESPACE_NODE and ACPI_OPERAND_OBJECT
    * structures.
    */
   #define ACPI_OBJECT_COMMON_HEADER \
       union acpi_operand_object       *NextObject;        /* Objects linked to parent NS node */\
       UINT8                           DescriptorType;     /* To differentiate various internal objs */\
       UINT8                           Type;               /* ACPI_OBJECT_TYPE */\
       UINT16                          ReferenceCount;     /* For object deletion management */\
       UINT8                           Flags;
       /*
        * Note: There are 3 bytes available here before the
        * next natural alignment boundary (for both 32/64 cases)
        */
   
   /* Values for Flag byte above */
   
   #define AOPOBJ_AML_CONSTANT         0x01    /* Integer is an AML constant */
   #define AOPOBJ_STATIC_POINTER       0x02    /* Data is part of an ACPI table, don't delete */
   #define AOPOBJ_DATA_VALID           0x04    /* Object is initialized and data is valid */
   #define AOPOBJ_OBJECT_INITIALIZED   0x08    /* Region is initialized */
   #define AOPOBJ_REG_CONNECTED        0x10    /* _REG was run */
   #define AOPOBJ_SETUP_COMPLETE       0x20    /* Region setup is complete */
   #define AOPOBJ_INVALID              0x40    /* Host OS won't allow a Region address */
   
   
   /******************************************************************************
    *
    * Basic data types
    *
    *****************************************************************************/
   
   typedef struct acpi_object_common
   {
       ACPI_OBJECT_COMMON_HEADER
   
   } ACPI_OBJECT_COMMON;
   
   
   typedef struct acpi_object_integer
   {
       ACPI_OBJECT_COMMON_HEADER
       UINT8                           Fill[3];            /* Prevent warning on some compilers */
       UINT64                          Value;
   
   } ACPI_OBJECT_INTEGER;
   
   
   /*
    * Note: The String and Buffer object must be identical through the
    * pointer and length elements. There is code that depends on this.
    *
    * Fields common to both Strings and Buffers
    */
   #define ACPI_COMMON_BUFFER_INFO(_Type) \
       _Type                           *Pointer; \
       UINT32                          Length;
   
   
   /* Null terminated, ASCII characters only */
   
   typedef struct acpi_object_string
   {
       ACPI_OBJECT_COMMON_HEADER
       ACPI_COMMON_BUFFER_INFO         (char)              /* String in AML stream or allocated string */
   
   } ACPI_OBJECT_STRING;
   
   
   typedef struct acpi_object_buffer
   {
       ACPI_OBJECT_COMMON_HEADER
       ACPI_COMMON_BUFFER_INFO         (UINT8)             /* Buffer in AML stream or allocated buffer */
       UINT32                          AmlLength;
       UINT8                           *AmlStart;
       ACPI_NAMESPACE_NODE             *Node;              /* Link back to parent node */
   
   } ACPI_OBJECT_BUFFER;
   
   
   typedef struct acpi_object_package
   {
       ACPI_OBJECT_COMMON_HEADER
       ACPI_NAMESPACE_NODE             *Node;              /* Link back to parent node */
       union acpi_operand_object       **Elements;         /* Array of pointers to AcpiObjects */
       UINT8                           *AmlStart;
       UINT32                          AmlLength;
       UINT32                          Count;              /* # of elements in package */
   
   } ACPI_OBJECT_PACKAGE;
   
   
   /******************************************************************************
    *
    * Complex data types
    *
    *****************************************************************************/
   
   typedef struct acpi_object_event
   {
       ACPI_OBJECT_COMMON_HEADER
       ACPI_SEMAPHORE                  OsSemaphore;        /* Actual OS synchronization object */
   
   } ACPI_OBJECT_EVENT;
   
   
   typedef struct acpi_object_mutex
   {
       ACPI_OBJECT_COMMON_HEADER
       UINT8                           SyncLevel;          /* 0-15, specified in Mutex() call */
       UINT16                          AcquisitionDepth;   /* Allow multiple Acquires, same thread */
       ACPI_MUTEX                      OsMutex;            /* Actual OS synchronization object */
       ACPI_THREAD_ID                  ThreadId;           /* Current owner of the mutex */
       struct acpi_thread_state        *OwnerThread;       /* Current owner of the mutex */
       union acpi_operand_object       *Prev;              /* Link for list of acquired mutexes */
       union acpi_operand_object       *Next;              /* Link for list of acquired mutexes */
       ACPI_NAMESPACE_NODE             *Node;              /* Containing namespace node */
       UINT8                           OriginalSyncLevel;  /* Owner's original sync level (0-15) */
   
   } ACPI_OBJECT_MUTEX;
   
   
   typedef struct acpi_object_region
   {
       ACPI_OBJECT_COMMON_HEADER
       UINT8                           SpaceId;
       ACPI_NAMESPACE_NODE             *Node;              /* Containing namespace node */
       union acpi_operand_object       *Handler;           /* Handler for region access */
       union acpi_operand_object       *Next;
       ACPI_PHYSICAL_ADDRESS           Address;
       UINT32                          Length;
       void                            *Pointer;           /* Only for data table regions */
   
   } ACPI_OBJECT_REGION;
   
   
   typedef struct acpi_object_method
   {
       ACPI_OBJECT_COMMON_HEADER
       UINT8                           InfoFlags;
       UINT8                           ParamCount;
       UINT8                           SyncLevel;
       union acpi_operand_object       *Mutex;
       union acpi_operand_object       *Node;
       UINT8                           *AmlStart;
       union
       {
           ACPI_INTERNAL_METHOD            Implementation;
           union acpi_operand_object       *Handler;
       } Dispatch;
   
       UINT32                          AmlLength;
       ACPI_OWNER_ID                   OwnerId;
       UINT8                           ThreadCount;
   
   } ACPI_OBJECT_METHOD;
   
   /* Flags for InfoFlags field above */
   
   #define ACPI_METHOD_MODULE_LEVEL        0x01    /* Method is actually module-level code */
   #define ACPI_METHOD_INTERNAL_ONLY       0x02    /* Method is implemented internally (_OSI) */
   #define ACPI_METHOD_SERIALIZED          0x04    /* Method is serialized */
   #define ACPI_METHOD_SERIALIZED_PENDING  0x08    /* Method is to be marked serialized */
   #define ACPI_METHOD_IGNORE_SYNC_LEVEL   0x10    /* Method was auto-serialized at table load time */
   #define ACPI_METHOD_MODIFIED_NAMESPACE  0x20    /* Method modified the namespace */
   
   
   /******************************************************************************
    *
    * Objects that can be notified. All share a common NotifyInfo area.
    *
    *****************************************************************************/
   
   /*
    * Common fields for objects that support ASL notifications
    */
   #define ACPI_COMMON_NOTIFY_INFO \
       union acpi_operand_object       *NotifyList[2];     /* Handlers for system/device notifies */\
       union acpi_operand_object       *Handler;           /* Handler for Address space */
   
   /* COMMON NOTIFY for POWER, PROCESSOR, DEVICE, and THERMAL */
   
   typedef struct acpi_object_notify_common
   {
       ACPI_OBJECT_COMMON_HEADER
       ACPI_COMMON_NOTIFY_INFO
   
   } ACPI_OBJECT_NOTIFY_COMMON;
   
   
   typedef struct acpi_object_device
   {
       ACPI_OBJECT_COMMON_HEADER
       ACPI_COMMON_NOTIFY_INFO
       ACPI_GPE_BLOCK_INFO             *GpeBlock;
   
   } ACPI_OBJECT_DEVICE;
   
   
   typedef struct acpi_object_power_resource
   {
       ACPI_OBJECT_COMMON_HEADER
       ACPI_COMMON_NOTIFY_INFO
       UINT32                          SystemLevel;
       UINT32                          ResourceOrder;
   
   } ACPI_OBJECT_POWER_RESOURCE;
   
   
   typedef struct acpi_object_processor
   {
       ACPI_OBJECT_COMMON_HEADER
   
       /* The next two fields take advantage of the 3-byte space before NOTIFY_INFO */
   
       UINT8                           ProcId;
       UINT8                           Length;
       ACPI_COMMON_NOTIFY_INFO
       ACPI_IO_ADDRESS                 Address;
   
   } ACPI_OBJECT_PROCESSOR;
   
   
   typedef struct acpi_object_thermal_zone
   {
       ACPI_OBJECT_COMMON_HEADER
       ACPI_COMMON_NOTIFY_INFO
   
   } ACPI_OBJECT_THERMAL_ZONE;
   
   
   /******************************************************************************
    *
    * Fields. All share a common header/info field.
    *
    *****************************************************************************/
   
   /*
    * Common bitfield for the field objects
    * "Field Datum"  -- a datum from the actual field object
    * "Buffer Datum" -- a datum from a user buffer, read from or to be written to the field
    */
   #define ACPI_COMMON_FIELD_INFO \
       UINT8                           FieldFlags;         /* Access, update, and lock bits */\
       UINT8                           Attribute;          /* From AccessAs keyword */\
       UINT8                           AccessByteWidth;    /* Read/Write size in bytes */\
       ACPI_NAMESPACE_NODE             *Node;              /* Link back to parent node */\
       UINT32                          BitLength;          /* Length of field in bits */\
       UINT32                          BaseByteOffset;     /* Byte offset within containing object */\
       UINT32                          Value;              /* Value to store into the Bank or Index register */\
       UINT8                           StartFieldBitOffset;/* Bit offset within first field datum (0-63) */\
       UINT8                           AccessLength;       /* For serial regions/fields */
   
   /* COMMON FIELD (for BUFFER, REGION, BANK, and INDEX fields) */
   
   typedef struct acpi_object_field_common
   {
       ACPI_OBJECT_COMMON_HEADER
       ACPI_COMMON_FIELD_INFO
       union acpi_operand_object       *RegionObj;         /* Parent Operation Region object (REGION/BANK fields only) */
   
   } ACPI_OBJECT_FIELD_COMMON;
   
   
   typedef struct acpi_object_region_field
   {
       ACPI_OBJECT_COMMON_HEADER
       ACPI_COMMON_FIELD_INFO
       UINT16                          ResourceLength;
       union acpi_operand_object       *RegionObj;         /* Containing OpRegion object */
       UINT8                           *ResourceBuffer;    /* ResourceTemplate for serial regions/fields */
       UINT16                          PinNumberIndex;     /* Index relative to previous Connection/Template */
       UINT8                           *InternalPccBuffer; /* Internal buffer for fields associated with PCC */
   
   } ACPI_OBJECT_REGION_FIELD;
   
   
   typedef struct acpi_object_bank_field
   {
       ACPI_OBJECT_COMMON_HEADER
       ACPI_COMMON_FIELD_INFO
       union acpi_operand_object       *RegionObj;         /* Containing OpRegion object */
       union acpi_operand_object       *BankObj;           /* BankSelect Register object */
   
   } ACPI_OBJECT_BANK_FIELD;
   
   
   typedef struct acpi_object_index_field
   {
       ACPI_OBJECT_COMMON_HEADER
       ACPI_COMMON_FIELD_INFO
   
       /*
        * No "RegionObj" pointer needed since the Index and Data registers
        * are each field definitions unto themselves.
        */
       union acpi_operand_object       *IndexObj;          /* Index register */
       union acpi_operand_object       *DataObj;           /* Data register */
   
   } ACPI_OBJECT_INDEX_FIELD;
   
   
   /* The BufferField is different in that it is part of a Buffer, not an OpRegion */
   
   typedef struct acpi_object_buffer_field
   {
       ACPI_OBJECT_COMMON_HEADER
       ACPI_COMMON_FIELD_INFO
       BOOLEAN                         IsCreateField;      /* Special case for objects created by CreateField() */
       union acpi_operand_object       *BufferObj;         /* Containing Buffer object */
   
   } ACPI_OBJECT_BUFFER_FIELD;
   
   
   /******************************************************************************
    *
    * Objects for handlers
    *
    *****************************************************************************/
   
   typedef struct acpi_object_notify_handler
   {
       ACPI_OBJECT_COMMON_HEADER
       ACPI_NAMESPACE_NODE             *Node;              /* Parent device */
       UINT32                          HandlerType;        /* Type: Device/System/Both */
       ACPI_NOTIFY_HANDLER             Handler;            /* Handler address */
       void                            *Context;
       union acpi_operand_object       *Next[2];           /* Device and System handler lists */
   
   } ACPI_OBJECT_NOTIFY_HANDLER;
   
   
   typedef struct acpi_object_addr_handler
   {
       ACPI_OBJECT_COMMON_HEADER
       UINT8                           SpaceId;
       UINT8                           HandlerFlags;
       ACPI_ADR_SPACE_HANDLER          Handler;
       ACPI_NAMESPACE_NODE             *Node;              /* Parent device */
       void                            *Context;
       ACPI_MUTEX                      ContextMutex;
       ACPI_ADR_SPACE_SETUP            Setup;
       union acpi_operand_object       *RegionList;        /* Regions using this handler */
       union acpi_operand_object       *Next;
   
   } ACPI_OBJECT_ADDR_HANDLER;
   
   /* Flags for address handler (HandlerFlags) */
   
   #define ACPI_ADDR_HANDLER_DEFAULT_INSTALLED  0x01
   
   
   /******************************************************************************
    *
    * Special internal objects
    *
    *****************************************************************************/
   
   /*
    * The Reference object is used for these opcodes:
    * Arg[0-6], Local[0-7], IndexOp, NameOp, RefOfOp, LoadOp, LoadTableOp, DebugOp
    * The Reference.Class differentiates these types.
    */
   typedef struct acpi_object_reference
   {
       ACPI_OBJECT_COMMON_HEADER
       UINT8                           Class;              /* Reference Class */
       UINT8                           TargetType;         /* Used for Index Op */
       UINT8                           Resolved;           /* Reference has been resolved to a value */
       void                            *Object;            /* NameOp=>HANDLE to obj, IndexOp=>ACPI_OPERAND_OBJECT */
       ACPI_NAMESPACE_NODE             *Node;              /* RefOf or Namepath */
       union acpi_operand_object       **Where;            /* Target of Index */
       UINT8                           *IndexPointer;      /* Used for Buffers and Strings */
       UINT8                           *Aml;               /* Used for deferred resolution of the ref */
       UINT32                          Value;              /* Used for Local/Arg/Index/DdbHandle */
   
   } ACPI_OBJECT_REFERENCE;
   
   /* Values for Reference.Class above */
   
   typedef enum
   {
       ACPI_REFCLASS_LOCAL             = 0,        /* Method local */
       ACPI_REFCLASS_ARG               = 1,        /* Method argument */
       ACPI_REFCLASS_REFOF             = 2,        /* Result of RefOf() TBD: Split to Ref/Node and Ref/OperandObj? */
       ACPI_REFCLASS_INDEX             = 3,        /* Result of Index() */
       ACPI_REFCLASS_TABLE             = 4,        /* DdbHandle - Load(), LoadTable() */
       ACPI_REFCLASS_NAME              = 5,        /* Reference to a named object */
       ACPI_REFCLASS_DEBUG             = 6,        /* Debug object */
   
       ACPI_REFCLASS_MAX               = 6
   
   } ACPI_REFERENCE_CLASSES;
   
   /*
    * Extra object is used as additional storage for types that
    * have AML code in their declarations (TermArgs) that must be
    * evaluated at run time.
    *
    * Currently: Region and FieldUnit types
    */
   typedef struct acpi_object_extra
   {
       ACPI_OBJECT_COMMON_HEADER
       ACPI_NAMESPACE_NODE             *Method_REG;        /* _REG method for this region (if any) */
       ACPI_NAMESPACE_NODE             *ScopeNode;
       void                            *RegionContext;     /* Region-specific data */
       UINT8                           *AmlStart;
       UINT32                          AmlLength;
   
   } ACPI_OBJECT_EXTRA;
   
   
   /* Additional data that can be attached to namespace nodes */
   
   typedef struct acpi_object_data
   {
       ACPI_OBJECT_COMMON_HEADER
       ACPI_OBJECT_HANDLER             Handler;
       void                            *Pointer;
   
   } ACPI_OBJECT_DATA;
   
   
   /* Structure used when objects are cached for reuse */
   
   typedef struct acpi_object_cache_list
   {
       ACPI_OBJECT_COMMON_HEADER
       union acpi_operand_object       *Next;              /* Link for object cache and internal lists*/
   
   } ACPI_OBJECT_CACHE_LIST;
   
   
   /******************************************************************************
    *
    * ACPI_OPERAND_OBJECT Descriptor - a giant union of all of the above
    *
    *****************************************************************************/
   
   typedef union acpi_operand_object
   {
       ACPI_OBJECT_COMMON                  Common;
       ACPI_OBJECT_INTEGER                 Integer;
       ACPI_OBJECT_STRING                  String;
       ACPI_OBJECT_BUFFER                  Buffer;
       ACPI_OBJECT_PACKAGE                 Package;
       ACPI_OBJECT_EVENT                   Event;
       ACPI_OBJECT_METHOD                  Method;
       ACPI_OBJECT_MUTEX                   Mutex;
       ACPI_OBJECT_REGION                  Region;
       ACPI_OBJECT_NOTIFY_COMMON           CommonNotify;
       ACPI_OBJECT_DEVICE                  Device;
       ACPI_OBJECT_POWER_RESOURCE          PowerResource;
       ACPI_OBJECT_PROCESSOR               Processor;
       ACPI_OBJECT_THERMAL_ZONE            ThermalZone;
       ACPI_OBJECT_FIELD_COMMON            CommonField;
       ACPI_OBJECT_REGION_FIELD            Field;
       ACPI_OBJECT_BUFFER_FIELD            BufferField;
       ACPI_OBJECT_BANK_FIELD              BankField;
       ACPI_OBJECT_INDEX_FIELD             IndexField;
       ACPI_OBJECT_NOTIFY_HANDLER          Notify;
       ACPI_OBJECT_ADDR_HANDLER            AddressSpace;
       ACPI_OBJECT_REFERENCE               Reference;
       ACPI_OBJECT_EXTRA                   Extra;
       ACPI_OBJECT_DATA                    Data;
       ACPI_OBJECT_CACHE_LIST              Cache;
   
       /*
        * Add namespace node to union in order to simplify code that accepts both
        * ACPI_OPERAND_OBJECTs and ACPI_NAMESPACE_NODEs. The structures share
        * a common DescriptorType field in order to differentiate them.
        */
       ACPI_NAMESPACE_NODE                 Node;
   
   } ACPI_OPERAND_OBJECT;
   
   
   /******************************************************************************
    *
    * ACPI_DESCRIPTOR - objects that share a common descriptor identifier
    *
    *****************************************************************************/
   
   /* Object descriptor types */
   
   #define ACPI_DESC_TYPE_CACHED           0x01        /* Used only when object is cached */
   #define ACPI_DESC_TYPE_STATE            0x02
   #define ACPI_DESC_TYPE_STATE_UPDATE     0x03
   #define ACPI_DESC_TYPE_STATE_PACKAGE    0x04
   #define ACPI_DESC_TYPE_STATE_CONTROL    0x05
   #define ACPI_DESC_TYPE_STATE_RPSCOPE    0x06
   #define ACPI_DESC_TYPE_STATE_PSCOPE     0x07
   #define ACPI_DESC_TYPE_STATE_WSCOPE     0x08
   #define ACPI_DESC_TYPE_STATE_RESULT     0x09
   #define ACPI_DESC_TYPE_STATE_NOTIFY     0x0A
   #define ACPI_DESC_TYPE_STATE_THREAD     0x0B
   #define ACPI_DESC_TYPE_WALK             0x0C
   #define ACPI_DESC_TYPE_PARSER           0x0D
   #define ACPI_DESC_TYPE_OPERAND          0x0E
   #define ACPI_DESC_TYPE_NAMED            0x0F
   #define ACPI_DESC_TYPE_MAX              0x0F
   
   
   typedef struct acpi_common_descriptor
   {
       void                            *CommonPointer;
       UINT8                           DescriptorType; /* To differentiate various internal objs */
   
   } ACPI_COMMON_DESCRIPTOR;
   
   typedef union acpi_descriptor
   {
       ACPI_COMMON_DESCRIPTOR          Common;
       ACPI_OPERAND_OBJECT             Object;
       ACPI_NAMESPACE_NODE             Node;
       ACPI_PARSE_OBJECT               Op;
   
   } ACPI_DESCRIPTOR;
   
   #pragma pack()
   
   #endif /* _ACOBJECT_H */

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