FreeBSD/Linux Kernel Cross Reference
sys/contrib/dev/acpica/components/tables/tbfadt.c

     /******************************************************************************
      *
      * Module Name: tbfadt   - FADT table utilities
      *
      *****************************************************************************/
     
     /******************************************************************************
      *
      * 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.
    *
    *****************************************************************************/
   
   #include <contrib/dev/acpica/include/acpi.h>
   #include <contrib/dev/acpica/include/accommon.h>
   #include <contrib/dev/acpica/include/actables.h>
   
   #define _COMPONENT          ACPI_TABLES
           ACPI_MODULE_NAME    ("tbfadt")
   
   /* Local prototypes */
   
   static void
   AcpiTbInitGenericAddress (
       ACPI_GENERIC_ADDRESS    *GenericAddress,
       UINT8                   SpaceId,
       UINT8                   ByteWidth,
       UINT64                  Address,
       const char              *RegisterName,
       UINT8                   Flags);
   
   static void
   AcpiTbConvertFadt (
       void);
   
   static void
   AcpiTbSetupFadtRegisters (
       void);
   
   static UINT64
   AcpiTbSelectAddress (
       char                    *RegisterName,
       UINT32                  Address32,
       UINT64                  Address64);
   
   
   /* Table for conversion of FADT to common internal format and FADT validation */
   
   typedef struct acpi_fadt_info
   {
       const char              *Name;
       UINT16                  Address64;
       UINT16                  Address32;
       UINT16                  Length;
       UINT8                   DefaultLength;
       UINT8                   Flags;
   
   } ACPI_FADT_INFO;
   
   #define ACPI_FADT_OPTIONAL          0
   #define ACPI_FADT_REQUIRED          1
   #define ACPI_FADT_SEPARATE_LENGTH   2
   #define ACPI_FADT_GPE_REGISTER      4
   
   static ACPI_FADT_INFO     FadtInfoTable[] =
   {
       {"Pm1aEventBlock",
           ACPI_FADT_OFFSET (XPm1aEventBlock),
           ACPI_FADT_OFFSET (Pm1aEventBlock),
           ACPI_FADT_OFFSET (Pm1EventLength),
           ACPI_PM1_REGISTER_WIDTH * 2,        /* Enable + Status register */
           ACPI_FADT_REQUIRED},
   
       {"Pm1bEventBlock",
           ACPI_FADT_OFFSET (XPm1bEventBlock),
           ACPI_FADT_OFFSET (Pm1bEventBlock),
           ACPI_FADT_OFFSET (Pm1EventLength),
           ACPI_PM1_REGISTER_WIDTH * 2,        /* Enable + Status register */
           ACPI_FADT_OPTIONAL},
   
       {"Pm1aControlBlock",
           ACPI_FADT_OFFSET (XPm1aControlBlock),
           ACPI_FADT_OFFSET (Pm1aControlBlock),
           ACPI_FADT_OFFSET (Pm1ControlLength),
           ACPI_PM1_REGISTER_WIDTH,
           ACPI_FADT_REQUIRED},
   
       {"Pm1bControlBlock",
           ACPI_FADT_OFFSET (XPm1bControlBlock),
           ACPI_FADT_OFFSET (Pm1bControlBlock),
           ACPI_FADT_OFFSET (Pm1ControlLength),
           ACPI_PM1_REGISTER_WIDTH,
           ACPI_FADT_OPTIONAL},
   
       {"Pm2ControlBlock",
           ACPI_FADT_OFFSET (XPm2ControlBlock),
           ACPI_FADT_OFFSET (Pm2ControlBlock),
           ACPI_FADT_OFFSET (Pm2ControlLength),
           ACPI_PM2_REGISTER_WIDTH,
           ACPI_FADT_SEPARATE_LENGTH},
   
       {"PmTimerBlock",
           ACPI_FADT_OFFSET (XPmTimerBlock),
           ACPI_FADT_OFFSET (PmTimerBlock),
           ACPI_FADT_OFFSET (PmTimerLength),
           ACPI_PM_TIMER_WIDTH,
           ACPI_FADT_SEPARATE_LENGTH},         /* ACPI 5.0A: Timer is optional */
   
       {"Gpe0Block",
           ACPI_FADT_OFFSET (XGpe0Block),
           ACPI_FADT_OFFSET (Gpe0Block),
           ACPI_FADT_OFFSET (Gpe0BlockLength),
           0,
           ACPI_FADT_SEPARATE_LENGTH | ACPI_FADT_GPE_REGISTER},
   
       {"Gpe1Block",
           ACPI_FADT_OFFSET (XGpe1Block),
           ACPI_FADT_OFFSET (Gpe1Block),
           ACPI_FADT_OFFSET (Gpe1BlockLength),
           0,
           ACPI_FADT_SEPARATE_LENGTH | ACPI_FADT_GPE_REGISTER}
   };
   
   #define ACPI_FADT_INFO_ENTRIES \
               (sizeof (FadtInfoTable) / sizeof (ACPI_FADT_INFO))
   
   
   /* Table used to split Event Blocks into separate status/enable registers */
   
   typedef struct acpi_fadt_pm_info
   {
       ACPI_GENERIC_ADDRESS    *Target;
       UINT16                  Source;
       UINT8                   RegisterNum;
   
   } ACPI_FADT_PM_INFO;
   
   static ACPI_FADT_PM_INFO    FadtPmInfoTable[] =
   {
       {&AcpiGbl_XPm1aStatus,
           ACPI_FADT_OFFSET (XPm1aEventBlock),
           0},
   
       {&AcpiGbl_XPm1aEnable,
           ACPI_FADT_OFFSET (XPm1aEventBlock),
           1},
   
       {&AcpiGbl_XPm1bStatus,
           ACPI_FADT_OFFSET (XPm1bEventBlock),
           0},
   
       {&AcpiGbl_XPm1bEnable,
           ACPI_FADT_OFFSET (XPm1bEventBlock),
           1}
   };
   
   #define ACPI_FADT_PM_INFO_ENTRIES \
               (sizeof (FadtPmInfoTable) / sizeof (ACPI_FADT_PM_INFO))
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiTbInitGenericAddress
    *
    * PARAMETERS:  GenericAddress      - GAS struct to be initialized
    *              SpaceId             - ACPI Space ID for this register
    *              ByteWidth           - Width of this register
    *              Address             - Address of the register
    *              RegisterName        - ASCII name of the ACPI register
    *
    * RETURN:      None
    *
    * DESCRIPTION: Initialize a Generic Address Structure (GAS)
    *              See the ACPI specification for a full description and
    *              definition of this structure.
    *
    ******************************************************************************/
   
   static void
   AcpiTbInitGenericAddress (
       ACPI_GENERIC_ADDRESS    *GenericAddress,
       UINT8                   SpaceId,
       UINT8                   ByteWidth,
       UINT64                  Address,
       const char              *RegisterName,
       UINT8                   Flags)
   {
       UINT8                   BitWidth;
   
   
       /*
        * Bit width field in the GAS is only one byte long, 255 max.
        * Check for BitWidth overflow in GAS.
        */
       BitWidth = (UINT8) (ByteWidth * 8);
       if (ByteWidth > 31)     /* (31*8)=248, (32*8)=256 */
       {
           /*
            * No error for GPE blocks, because we do not use the BitWidth
            * for GPEs, the legacy length (ByteWidth) is used instead to
            * allow for a large number of GPEs.
            */
           if (!(Flags & ACPI_FADT_GPE_REGISTER))
           {
               ACPI_ERROR ((AE_INFO,
                   "%s - 32-bit FADT register is too long (%u bytes, %u bits) "
                   "to convert to GAS struct - 255 bits max, truncating",
                   RegisterName, ByteWidth, (ByteWidth * 8)));
           }
   
           BitWidth = 255;
       }
   
       /*
        * The 64-bit Address field is non-aligned in the byte packed
        * GAS struct.
        */
       ACPI_MOVE_64_TO_64 (&GenericAddress->Address, &Address);
   
       /* All other fields are byte-wide */
   
       GenericAddress->SpaceId = SpaceId;
       GenericAddress->BitWidth = BitWidth;
       GenericAddress->BitOffset = 0;
       GenericAddress->AccessWidth = 0; /* Access width ANY */
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiTbSelectAddress
    *
    * PARAMETERS:  RegisterName        - ASCII name of the ACPI register
    *              Address32           - 32-bit address of the register
    *              Address64           - 64-bit address of the register
    *
    * RETURN:      The resolved 64-bit address
    *
    * DESCRIPTION: Select between 32-bit and 64-bit versions of addresses within
    *              the FADT. Used for the FACS and DSDT addresses.
    *
    * NOTES:
    *
    * Check for FACS and DSDT address mismatches. An address mismatch between
    * the 32-bit and 64-bit address fields (FIRMWARE_CTRL/X_FIRMWARE_CTRL and
    * DSDT/X_DSDT) could be a corrupted address field or it might indicate
    * the presence of two FACS or two DSDT tables.
    *
    * November 2013:
    * By default, as per the ACPICA specification, a valid 64-bit address is
    * used regardless of the value of the 32-bit address. However, this
    * behavior can be overridden via the AcpiGbl_Use32BitFadtAddresses flag.
    *
    ******************************************************************************/
   
   static UINT64
   AcpiTbSelectAddress (
       char                    *RegisterName,
       UINT32                  Address32,
       UINT64                  Address64)
   {
   
       if (!Address64)
       {
           /* 64-bit address is zero, use 32-bit address */
   
           return ((UINT64) Address32);
       }
   
       if (Address32 &&
          (Address64 != (UINT64) Address32))
       {
           /* Address mismatch between 32-bit and 64-bit versions */
   
           ACPI_BIOS_WARNING ((AE_INFO,
               "32/64X %s address mismatch in FADT: "
               "0x%8.8X/0x%8.8X%8.8X, using %u-bit address",
               RegisterName, Address32, ACPI_FORMAT_UINT64 (Address64),
               AcpiGbl_Use32BitFadtAddresses ? 32 : 64));
   
           /* 32-bit address override */
   
           if (AcpiGbl_Use32BitFadtAddresses)
           {
               return ((UINT64) Address32);
           }
       }
   
       /* Default is to use the 64-bit address */
   
       return (Address64);
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiTbParseFadt
    *
    * PARAMETERS:  None
    *
    * RETURN:      None
    *
    * DESCRIPTION: Initialize the FADT, DSDT and FACS tables
    *              (FADT contains the addresses of the DSDT and FACS)
    *
    ******************************************************************************/
   
   void
   AcpiTbParseFadt (
       void)
   {
       UINT32                  Length;
       ACPI_TABLE_HEADER       *Table;
       ACPI_TABLE_DESC         *FadtDesc;
       ACPI_STATUS             Status;
   
   
       /*
        * The FADT has multiple versions with different lengths,
        * and it contains pointers to both the DSDT and FACS tables.
        *
        * Get a local copy of the FADT and convert it to a common format
        * Map entire FADT, assumed to be smaller than one page.
        */
       FadtDesc = &AcpiGbl_RootTableList.Tables[AcpiGbl_FadtIndex];
       Status = AcpiTbGetTable (FadtDesc, &Table);
       if (ACPI_FAILURE (Status))
       {
           return;
       }
       Length = FadtDesc->Length;
   
       /*
        * Validate the FADT checksum before we copy the table. Ignore
        * checksum error as we want to try to get the DSDT and FACS.
        */
       (void) AcpiUtVerifyChecksum (Table, Length);
   
       /* Create a local copy of the FADT in common ACPI 2.0+ format */
   
       AcpiTbCreateLocalFadt (Table, Length);
   
       /* All done with the real FADT, unmap it */
   
       AcpiTbPutTable (FadtDesc);
   
       /* Obtain the DSDT and FACS tables via their addresses within the FADT */
   
       AcpiTbInstallStandardTable (
           (ACPI_PHYSICAL_ADDRESS) AcpiGbl_FADT.XDsdt,
           ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL, NULL, FALSE, TRUE,
           &AcpiGbl_DsdtIndex);
   
       /* If Hardware Reduced flag is set, there is no FACS */
   
       if (!AcpiGbl_ReducedHardware)
       {
           if (AcpiGbl_FADT.Facs)
           {
               AcpiTbInstallStandardTable (
                   (ACPI_PHYSICAL_ADDRESS) AcpiGbl_FADT.Facs,
                   ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL, NULL, FALSE, TRUE,
                   &AcpiGbl_FacsIndex);
           }
           if (AcpiGbl_FADT.XFacs)
           {
               AcpiTbInstallStandardTable (
                   (ACPI_PHYSICAL_ADDRESS) AcpiGbl_FADT.XFacs,
                   ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL, NULL, FALSE, TRUE,
                   &AcpiGbl_XFacsIndex);
           }
       }
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiTbCreateLocalFadt
    *
    * PARAMETERS:  Table               - Pointer to BIOS FADT
    *              Length              - Length of the table
    *
    * RETURN:      None
    *
    * DESCRIPTION: Get a local copy of the FADT and convert it to a common format.
    *              Performs validation on some important FADT fields.
    *
    * NOTE:        We create a local copy of the FADT regardless of the version.
    *
    ******************************************************************************/
   
   void
   AcpiTbCreateLocalFadt (
       ACPI_TABLE_HEADER       *Table,
       UINT32                  Length)
   {
   
       /*
        * Check if the FADT is larger than the largest table that we expect
        * (typically the current ACPI specification version). If so, truncate
        * the table, and issue a warning.
        */
       if (Length > sizeof (ACPI_TABLE_FADT))
       {
           ACPI_BIOS_WARNING ((AE_INFO,
               "FADT (revision %u) is longer than %s length, "
               "truncating length %u to %u",
               Table->Revision, ACPI_FADT_CONFORMANCE, Length,
               (UINT32) sizeof (ACPI_TABLE_FADT)));
       }
   
       /* Clear the entire local FADT */
   
       memset (&AcpiGbl_FADT, 0, sizeof (ACPI_TABLE_FADT));
   
       /* Copy the original FADT, up to sizeof (ACPI_TABLE_FADT) */
   
       memcpy (&AcpiGbl_FADT, Table,
           ACPI_MIN (Length, sizeof (ACPI_TABLE_FADT)));
   
       /* Take a copy of the Hardware Reduced flag */
   
       AcpiGbl_ReducedHardware = FALSE;
       if (AcpiGbl_FADT.Flags & ACPI_FADT_HW_REDUCED)
       {
           AcpiGbl_ReducedHardware = TRUE;
       }
   
       /* Convert the local copy of the FADT to the common internal format */
   
       AcpiTbConvertFadt ();
   
       /* Initialize the global ACPI register structures */
   
       AcpiTbSetupFadtRegisters ();
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiTbConvertFadt
    *
    * PARAMETERS:  None - AcpiGbl_FADT is used.
    *
    * RETURN:      None
    *
    * DESCRIPTION: Converts all versions of the FADT to a common internal format.
    *              Expand 32-bit addresses to 64-bit as necessary. Also validate
    *              important fields within the FADT.
    *
    * NOTE:        AcpiGbl_FADT must be of size (ACPI_TABLE_FADT), and must
    *              contain a copy of the actual BIOS-provided FADT.
    *
    * Notes on 64-bit register addresses:
    *
    * After this FADT conversion, later ACPICA code will only use the 64-bit "X"
    * fields of the FADT for all ACPI register addresses.
    *
    * The 64-bit X fields are optional extensions to the original 32-bit FADT
    * V1.0 fields. Even if they are present in the FADT, they are optional and
    * are unused if the BIOS sets them to zero. Therefore, we must copy/expand
    * 32-bit V1.0 fields to the 64-bit X fields if the 64-bit X field is originally
    * zero.
    *
    * For ACPI 1.0 FADTs (that contain no 64-bit addresses), all 32-bit address
    * fields are expanded to the corresponding 64-bit X fields in the internal
    * common FADT.
    *
    * For ACPI 2.0+ FADTs, all valid (non-zero) 32-bit address fields are expanded
    * to the corresponding 64-bit X fields, if the 64-bit field is originally
    * zero. Adhering to the ACPI specification, we completely ignore the 32-bit
    * field if the 64-bit field is valid, regardless of whether the host OS is
    * 32-bit or 64-bit.
    *
    * Possible additional checks:
    *  (AcpiGbl_FADT.Pm1EventLength >= 4)
    *  (AcpiGbl_FADT.Pm1ControlLength >= 2)
    *  (AcpiGbl_FADT.PmTimerLength >= 4)
    *  Gpe block lengths must be multiple of 2
    *
    ******************************************************************************/
   
   static void
   AcpiTbConvertFadt (
       void)
   {
       const char              *Name;
       ACPI_GENERIC_ADDRESS    *Address64;
       UINT32                  Address32;
       UINT8                   Length;
       UINT8                   Flags;
       UINT32                  i;
   
   
       /*
        * For ACPI 1.0 FADTs (revision 1 or 2), ensure that reserved fields which
        * should be zero are indeed zero. This will workaround BIOSs that
        * inadvertently place values in these fields.
        *
        * The ACPI 1.0 reserved fields that will be zeroed are the bytes located
        * at offset 45, 55, 95, and the word located at offset 109, 110.
        *
        * Note: The FADT revision value is unreliable. Only the length can be
        * trusted.
        */
       if (AcpiGbl_FADT.Header.Length <= ACPI_FADT_V2_SIZE)
       {
           AcpiGbl_FADT.PreferredProfile = 0;
           AcpiGbl_FADT.PstateControl = 0;
           AcpiGbl_FADT.CstControl = 0;
           AcpiGbl_FADT.BootFlags = 0;
       }
   
       /*
        * Now we can update the local FADT length to the length of the
        * current FADT version as defined by the ACPI specification.
        * Thus, we will have a common FADT internally.
        */
       AcpiGbl_FADT.Header.Length = sizeof (ACPI_TABLE_FADT);
   
       /*
        * Expand the 32-bit DSDT addresses to 64-bit as necessary.
        * Later ACPICA code will always use the X 64-bit field.
        */
       AcpiGbl_FADT.XDsdt = AcpiTbSelectAddress ("DSDT",
           AcpiGbl_FADT.Dsdt, AcpiGbl_FADT.XDsdt);
   
       /* If Hardware Reduced flag is set, we are all done */
   
       if (AcpiGbl_ReducedHardware)
       {
           return;
       }
   
       /* Examine all of the 64-bit extended address fields (X fields) */
   
       for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++)
       {
           /*
            * Get the 32-bit and 64-bit addresses, as well as the register
            * length and register name.
            */
           Address32 = *ACPI_ADD_PTR (UINT32,
               &AcpiGbl_FADT, FadtInfoTable[i].Address32);
   
           Address64 = ACPI_ADD_PTR (ACPI_GENERIC_ADDRESS,
               &AcpiGbl_FADT, FadtInfoTable[i].Address64);
   
           Length = *ACPI_ADD_PTR (UINT8,
               &AcpiGbl_FADT, FadtInfoTable[i].Length);
   
           Name = FadtInfoTable[i].Name;
           Flags = FadtInfoTable[i].Flags;
   
           /*
            * Expand the ACPI 1.0 32-bit addresses to the ACPI 2.0 64-bit "X"
            * generic address structures as necessary. Later code will always use
            * the 64-bit address structures.
            *
            * November 2013:
            * Now always use the 64-bit address if it is valid (non-zero), in
            * accordance with the ACPI specification which states that a 64-bit
            * address supersedes the 32-bit version. This behavior can be
            * overridden by the AcpiGbl_Use32BitFadtAddresses flag.
            *
            * During 64-bit address construction and verification,
            * these cases are handled:
            *
            * Address32 zero, Address64 [don't care]   - Use Address64
            *
            * No override: if AcpiGbl_Use32BitFadtAddresses is FALSE, and:
            * Address32 non-zero, Address64 zero       - Copy/use Address32
            * Address32 non-zero == Address64 non-zero - Use Address64
            * Address32 non-zero != Address64 non-zero - Warning, use Address64
            *
            * Override: if AcpiGbl_Use32BitFadtAddresses is TRUE, and:
            * Address32 non-zero, Address64 zero       - Copy/use Address32
            * Address32 non-zero == Address64 non-zero - Copy/use Address32
            * Address32 non-zero != Address64 non-zero - Warning, copy/use Address32
            *
            * Note: SpaceId is always I/O for 32-bit legacy address fields
            */
           if (Address32)
           {
               if (Address64->Address)
               {
                   if (Address64->Address != (UINT64) Address32)
                   {
                       /* Address mismatch */
   
                       ACPI_BIOS_WARNING ((AE_INFO,
                           "32/64X address mismatch in FADT/%s: "
                           "0x%8.8X/0x%8.8X%8.8X, using %u-bit address",
                           Name, Address32,
                           ACPI_FORMAT_UINT64 (Address64->Address),
                           AcpiGbl_Use32BitFadtAddresses ? 32 : 64));
                   }
   
                   /*
                    * For each extended field, check for length mismatch
                    * between the legacy length field and the corresponding
                    * 64-bit X length field.
                    * Note: If the legacy length field is > 0xFF bits, ignore
                    * this check. (GPE registers can be larger than the
                    * 64-bit GAS structure can accommodate, 0xFF bits).
                    */
                   if ((ACPI_MUL_8 (Length) <= ACPI_UINT8_MAX) &&
                       (Address64->BitWidth != ACPI_MUL_8 (Length)))
                   {
                       ACPI_BIOS_WARNING ((AE_INFO,
                           "32/64X length mismatch in FADT/%s: %u/%u",
                           Name, ACPI_MUL_8 (Length), Address64->BitWidth));
                   }
               }
   
               /*
                * Hardware register access code always uses the 64-bit fields.
                * So if the 64-bit field is zero or is to be overridden,
                * initialize it with the 32-bit fields.
                * Note that when the 32-bit address favor is specified, the
                * 64-bit fields are always re-initialized so that
                * AccessSize/BitWidth/BitOffset fields can be correctly
                * configured to the values to trigger a 32-bit compatible
                * access mode in the hardware register access code.
                */
               if (!Address64->Address || AcpiGbl_Use32BitFadtAddresses)
               {
                   AcpiTbInitGenericAddress (Address64,
                       ACPI_ADR_SPACE_SYSTEM_IO, Length,
                       (UINT64) Address32, Name, Flags);
               }
           }
   
           if (FadtInfoTable[i].Flags & ACPI_FADT_REQUIRED)
           {
               /*
                * Field is required (PM1aEvent, PM1aControl).
                * Both the address and length must be non-zero.
                */
               if (!Address64->Address || !Length)
               {
                   ACPI_BIOS_ERROR ((AE_INFO,
                       "Required FADT field %s has zero address and/or length: "
                       "0x%8.8X%8.8X/0x%X",
                       Name, ACPI_FORMAT_UINT64 (Address64->Address), Length));
               }
           }
           else if (FadtInfoTable[i].Flags & ACPI_FADT_SEPARATE_LENGTH)
           {
               /*
                * Field is optional (PM2Control, GPE0, GPE1) AND has its own
                * length field. If present, both the address and length must
                * be valid.
                */
               if ((Address64->Address && !Length) ||
                   (!Address64->Address && Length))
               {
                   ACPI_BIOS_WARNING ((AE_INFO,
                       "Optional FADT field %s has valid %s but zero %s: "
                       "0x%8.8X%8.8X/0x%X", Name,
                       (Length ? "Length" : "Address"),
                       (Length ? "Address": "Length"),
                       ACPI_FORMAT_UINT64 (Address64->Address), Length));
               }
           }
       }
   }
   
   
   /*******************************************************************************
    *
    * FUNCTION:    AcpiTbSetupFadtRegisters
    *
    * PARAMETERS:  None, uses AcpiGbl_FADT.
    *
    * RETURN:      None
    *
    * DESCRIPTION: Initialize global ACPI PM1 register definitions. Optionally,
    *              force FADT register definitions to their default lengths.
    *
    ******************************************************************************/
   
   static void
   AcpiTbSetupFadtRegisters (
       void)
   {
       ACPI_GENERIC_ADDRESS    *Target64;
       ACPI_GENERIC_ADDRESS    *Source64;
       UINT8                   Pm1RegisterByteWidth;
       UINT32                  i;
   
   
       /*
        * Optionally check all register lengths against the default values and
        * update them if they are incorrect.
        */
       if (AcpiGbl_UseDefaultRegisterWidths)
       {
           for (i = 0; i < ACPI_FADT_INFO_ENTRIES; i++)
           {
               Target64 = ACPI_ADD_PTR (ACPI_GENERIC_ADDRESS, &AcpiGbl_FADT,
                   FadtInfoTable[i].Address64);
   
               /*
                * If a valid register (Address != 0) and the (DefaultLength > 0)
                * (Not a GPE register), then check the width against the default.
                */
               if ((Target64->Address) &&
                   (FadtInfoTable[i].DefaultLength > 0) &&
                   (FadtInfoTable[i].DefaultLength != Target64->BitWidth))
               {
                   ACPI_BIOS_WARNING ((AE_INFO,
                       "Invalid length for FADT/%s: %u, using default %u",
                       FadtInfoTable[i].Name, Target64->BitWidth,
                       FadtInfoTable[i].DefaultLength));
   
                   /* Incorrect size, set width to the default */
   
                   Target64->BitWidth = FadtInfoTable[i].DefaultLength;
               }
           }
       }
   
       /*
        * Get the length of the individual PM1 registers (enable and status).
        * Each register is defined to be (event block length / 2). Extra divide
        * by 8 converts bits to bytes.
        */
       Pm1RegisterByteWidth = (UINT8)
           ACPI_DIV_16 (AcpiGbl_FADT.XPm1aEventBlock.BitWidth);
   
       /*
        * Calculate separate GAS structs for the PM1x (A/B) Status and Enable
        * registers. These addresses do not appear (directly) in the FADT, so it
        * is useful to pre-calculate them from the PM1 Event Block definitions.
        *
        * The PM event blocks are split into two register blocks, first is the
        * PM Status Register block, followed immediately by the PM Enable
        * Register block. Each is of length (Pm1EventLength/2)
        *
        * Note: The PM1A event block is required by the ACPI specification.
        * However, the PM1B event block is optional and is rarely, if ever,
        * used.
        */
   
       for (i = 0; i < ACPI_FADT_PM_INFO_ENTRIES; i++)
       {
           Source64 = ACPI_ADD_PTR (ACPI_GENERIC_ADDRESS, &AcpiGbl_FADT,
               FadtPmInfoTable[i].Source);
   
           if (Source64->Address)
           {
               AcpiTbInitGenericAddress (FadtPmInfoTable[i].Target,
                   Source64->SpaceId, Pm1RegisterByteWidth,
                   Source64->Address +
                       (FadtPmInfoTable[i].RegisterNum * Pm1RegisterByteWidth),
                   "PmRegisters", 0);
           }
       }
   }

Cache object: 5f4cbee2587859d36e7e0ff9fbeeb269