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freebsd-dev/sys/contrib/dev/acpica/tbconvrt.c
Nate Lawson 4146e46ceb ACPICA import from the 0619 dist.
2003-07-13 22:44:13 +00:00

648 lines
22 KiB
C
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/******************************************************************************
*
* Module Name: tbconvrt - ACPI Table conversion utilities
* $Revision: 52 $
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999 - 2003, 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.
*
*****************************************************************************/
#define __TBCONVRT_C__
#include "acpi.h"
#include "actables.h"
#define _COMPONENT ACPI_TABLES
ACPI_MODULE_NAME ("tbconvrt")
/*******************************************************************************
*
* FUNCTION: AcpiTbGetTableCount
*
* PARAMETERS: RSDP - Pointer to the RSDP
* RSDT - Pointer to the RSDT/XSDT
*
* RETURN: The number of tables pointed to by the RSDT or XSDT.
*
* DESCRIPTION: Calculate the number of tables. Automatically handles either
* an RSDT or XSDT.
*
******************************************************************************/
UINT32
AcpiTbGetTableCount (
RSDP_DESCRIPTOR *RSDP,
ACPI_TABLE_HEADER *RSDT)
{
UINT32 PointerSize;
ACPI_FUNCTION_ENTRY ();
#if ACPI_MACHINE_WIDTH != 64
if (RSDP->Revision < 2)
{
PointerSize = sizeof (UINT32);
}
else
#endif
{
PointerSize = sizeof (UINT64);
}
/*
* Determine the number of tables pointed to by the RSDT/XSDT.
* This is defined by the ACPI Specification to be the number of
* pointers contained within the RSDT/XSDT. The size of the pointers
* is architecture-dependent.
*/
return ((RSDT->Length - sizeof (ACPI_TABLE_HEADER)) / PointerSize);
}
/*******************************************************************************
*
* FUNCTION: AcpiTbConvertToXsdt
*
* PARAMETERS: TableInfo - Info about the RSDT
*
* RETURN: Status
*
* DESCRIPTION: Convert an RSDT to an XSDT (internal common format)
*
******************************************************************************/
ACPI_STATUS
AcpiTbConvertToXsdt (
ACPI_TABLE_DESC *TableInfo)
{
ACPI_SIZE TableSize;
UINT32 i;
XSDT_DESCRIPTOR *NewTable;
ACPI_FUNCTION_ENTRY ();
/* Compute size of the converted XSDT */
TableSize = ((ACPI_SIZE) AcpiGbl_RsdtTableCount * sizeof (UINT64)) +
sizeof (ACPI_TABLE_HEADER);
/* Allocate an XSDT */
NewTable = ACPI_MEM_CALLOCATE (TableSize);
if (!NewTable)
{
return (AE_NO_MEMORY);
}
/* Copy the header and set the length */
ACPI_MEMCPY (NewTable, TableInfo->Pointer, sizeof (ACPI_TABLE_HEADER));
NewTable->Header.Length = (UINT32) TableSize;
/* Copy the table pointers */
for (i = 0; i < AcpiGbl_RsdtTableCount; i++)
{
if (AcpiGbl_RSDP->Revision < 2)
{
ACPI_STORE_ADDRESS (NewTable->TableOffsetEntry[i],
((RSDT_DESCRIPTOR_REV1 *) TableInfo->Pointer)->TableOffsetEntry[i]);
}
else
{
NewTable->TableOffsetEntry[i] =
((XSDT_DESCRIPTOR *) TableInfo->Pointer)->TableOffsetEntry[i];
}
}
/* Delete the original table (either mapped or in a buffer) */
AcpiTbDeleteSingleTable (TableInfo);
/* Point the table descriptor to the new table */
TableInfo->Pointer = (ACPI_TABLE_HEADER *) NewTable;
TableInfo->Length = TableSize;
TableInfo->Allocation = ACPI_MEM_ALLOCATED;
return (AE_OK);
}
/******************************************************************************
*
* FUNCTION: AcpiTbInitGenericAddress
*
* PARAMETERS: NewGasStruct - GAS struct to be initialized
* RegisterBitWidth - Width of this register
* Address - Address of the register
*
* RETURN: None
*
* DESCRIPTION: Initialize a GAS structure.
*
******************************************************************************/
static void
AcpiTbInitGenericAddress (
ACPI_GENERIC_ADDRESS *NewGasStruct,
UINT8 RegisterBitWidth,
ACPI_PHYSICAL_ADDRESS Address)
{
ACPI_STORE_ADDRESS (NewGasStruct->Address, Address);
NewGasStruct->AddressSpaceId = ACPI_ADR_SPACE_SYSTEM_IO;
NewGasStruct->RegisterBitWidth = RegisterBitWidth;
NewGasStruct->RegisterBitOffset = 0;
NewGasStruct->Reserved = 0;
}
/*******************************************************************************
*
* FUNCTION: AcpiTbConvertFadt1
*
* PARAMETERS: LocalFadt - Pointer to new FADT
* OriginalFadt - Pointer to old FADT
*
* RETURN: Populates LocalFadt
*
* DESCRIPTION: Convert an ACPI 1.0 FADT to common internal format
*
******************************************************************************/
static void
AcpiTbConvertFadt1 (
FADT_DESCRIPTOR_REV2 *LocalFadt,
FADT_DESCRIPTOR_REV1 *OriginalFadt)
{
/* ACPI 1.0 FACS */
/* The BIOS stored FADT should agree with Revision 1.0 */
/*
* Copy the table header and the common part of the tables.
*
* The 2.0 table is an extension of the 1.0 table, so the entire 1.0
* table can be copied first, then expand some fields to 64 bits.
*/
ACPI_MEMCPY (LocalFadt, OriginalFadt, sizeof (FADT_DESCRIPTOR_REV1));
/* Convert table pointers to 64-bit fields */
ACPI_STORE_ADDRESS (LocalFadt->XFirmwareCtrl, LocalFadt->V1_FirmwareCtrl);
ACPI_STORE_ADDRESS (LocalFadt->XDsdt, LocalFadt->V1_Dsdt);
/*
* System Interrupt Model isn't used in ACPI 2.0 (LocalFadt->Reserved1 = 0;)
*/
/*
* This field is set by the OEM to convey the preferred power management
* profile to OSPM. It doesn't have any 1.0 equivalence. Since we don't
* know what kind of 32-bit system this is, we will use "unspecified".
*/
LocalFadt->Prefer_PM_Profile = PM_UNSPECIFIED;
/*
* Processor Performance State Control. This is the value OSPM writes to
* the SMI_CMD register to assume processor performance state control
* responsibility. There isn't any equivalence in 1.0, leave it zeroed.
*/
LocalFadt->PstateCnt = 0;
/*
* Support for the _CST object and C States change notification.
* This data item hasn't any 1.0 equivalence so leave it zero.
*/
LocalFadt->CstCnt = 0;
/*
* Since there isn't any equivalence in 1.0 and since it highly likely
* that a 1.0 system has legacy support.
*/
LocalFadt->IapcBootArch = BAF_LEGACY_DEVICES;
/*
* Convert the V1.0 block addresses to V2.0 GAS structures
*/
AcpiTbInitGenericAddress (&LocalFadt->XPm1aEvtBlk, LocalFadt->Pm1EvtLen,
(ACPI_PHYSICAL_ADDRESS) LocalFadt->V1_Pm1aEvtBlk);
AcpiTbInitGenericAddress (&LocalFadt->XPm1bEvtBlk, LocalFadt->Pm1EvtLen,
(ACPI_PHYSICAL_ADDRESS) LocalFadt->V1_Pm1bEvtBlk);
AcpiTbInitGenericAddress (&LocalFadt->XPm1aCntBlk, LocalFadt->Pm1CntLen,
(ACPI_PHYSICAL_ADDRESS) LocalFadt->V1_Pm1aCntBlk);
AcpiTbInitGenericAddress (&LocalFadt->XPm1bCntBlk, LocalFadt->Pm1CntLen,
(ACPI_PHYSICAL_ADDRESS) LocalFadt->V1_Pm1bCntBlk);
AcpiTbInitGenericAddress (&LocalFadt->XPm2CntBlk, LocalFadt->Pm2CntLen,
(ACPI_PHYSICAL_ADDRESS) LocalFadt->V1_Pm2CntBlk);
AcpiTbInitGenericAddress (&LocalFadt->XPmTmrBlk, LocalFadt->PmTmLen,
(ACPI_PHYSICAL_ADDRESS) LocalFadt->V1_PmTmrBlk);
AcpiTbInitGenericAddress (&LocalFadt->XGpe0Blk, 0,
(ACPI_PHYSICAL_ADDRESS) LocalFadt->V1_Gpe0Blk);
AcpiTbInitGenericAddress (&LocalFadt->XGpe1Blk, 0,
(ACPI_PHYSICAL_ADDRESS) LocalFadt->V1_Gpe1Blk);
/* Create separate GAS structs for the PM1 Enable registers */
AcpiTbInitGenericAddress (&AcpiGbl_XPm1aEnable,
(UINT8) ACPI_DIV_2 (AcpiGbl_FADT->Pm1EvtLen),
(ACPI_PHYSICAL_ADDRESS) (ACPI_GET_ADDRESS (LocalFadt->XPm1aEvtBlk.Address) +
ACPI_DIV_2 (AcpiGbl_FADT->Pm1EvtLen)));
/* PM1B is optional; leave null if not present */
if (ACPI_GET_ADDRESS (LocalFadt->XPm1bEvtBlk.Address))
{
AcpiTbInitGenericAddress (&AcpiGbl_XPm1bEnable,
(UINT8) ACPI_DIV_2 (AcpiGbl_FADT->Pm1EvtLen),
(ACPI_PHYSICAL_ADDRESS) (ACPI_GET_ADDRESS (LocalFadt->XPm1bEvtBlk.Address) +
ACPI_DIV_2 (AcpiGbl_FADT->Pm1EvtLen)));
}
}
/*******************************************************************************
*
* FUNCTION: AcpiTbConvertFadt2
*
* PARAMETERS: LocalFadt - Pointer to new FADT
* OriginalFadt - Pointer to old FADT
*
* RETURN: Populates LocalFadt
*
* DESCRIPTION: Convert an ACPI 2.0 FADT to common internal format.
* Handles optional "X" fields.
*
******************************************************************************/
static void
AcpiTbConvertFadt2 (
FADT_DESCRIPTOR_REV2 *LocalFadt,
FADT_DESCRIPTOR_REV2 *OriginalFadt)
{
/* We have an ACPI 2.0 FADT but we must copy it to our local buffer */
ACPI_MEMCPY (LocalFadt, OriginalFadt, sizeof (FADT_DESCRIPTOR_REV2));
/*
* "X" fields are optional extensions to the original V1.0 fields, so
* we must selectively expand V1.0 fields if the corresponding X field
* is zero.
*/
if (!(ACPI_GET_ADDRESS (LocalFadt->XFirmwareCtrl)))
{
ACPI_STORE_ADDRESS (LocalFadt->XFirmwareCtrl, LocalFadt->V1_FirmwareCtrl);
}
if (!(ACPI_GET_ADDRESS (LocalFadt->XDsdt)))
{
ACPI_STORE_ADDRESS (LocalFadt->XDsdt, LocalFadt->V1_Dsdt);
}
if (!(ACPI_GET_ADDRESS (LocalFadt->XPm1aEvtBlk.Address)))
{
AcpiTbInitGenericAddress (&LocalFadt->XPm1aEvtBlk,
LocalFadt->Pm1EvtLen, (ACPI_PHYSICAL_ADDRESS) LocalFadt->V1_Pm1aEvtBlk);
}
if (!(ACPI_GET_ADDRESS (LocalFadt->XPm1bEvtBlk.Address)))
{
AcpiTbInitGenericAddress (&LocalFadt->XPm1bEvtBlk,
LocalFadt->Pm1EvtLen, (ACPI_PHYSICAL_ADDRESS) LocalFadt->V1_Pm1bEvtBlk);
}
if (!(ACPI_GET_ADDRESS (LocalFadt->XPm1aCntBlk.Address)))
{
AcpiTbInitGenericAddress (&LocalFadt->XPm1aCntBlk,
LocalFadt->Pm1CntLen, (ACPI_PHYSICAL_ADDRESS) LocalFadt->V1_Pm1aCntBlk);
}
if (!(ACPI_GET_ADDRESS (LocalFadt->XPm1bCntBlk.Address)))
{
AcpiTbInitGenericAddress (&LocalFadt->XPm1bCntBlk,
LocalFadt->Pm1CntLen, (ACPI_PHYSICAL_ADDRESS) LocalFadt->V1_Pm1bCntBlk);
}
if (!(ACPI_GET_ADDRESS (LocalFadt->XPm2CntBlk.Address)))
{
AcpiTbInitGenericAddress (&LocalFadt->XPm2CntBlk,
LocalFadt->Pm2CntLen, (ACPI_PHYSICAL_ADDRESS) LocalFadt->V1_Pm2CntBlk);
}
if (!(ACPI_GET_ADDRESS (LocalFadt->XPmTmrBlk.Address)))
{
AcpiTbInitGenericAddress (&LocalFadt->XPmTmrBlk,
LocalFadt->PmTmLen, (ACPI_PHYSICAL_ADDRESS) LocalFadt->V1_PmTmrBlk);
}
if (!(ACPI_GET_ADDRESS (LocalFadt->XGpe0Blk.Address)))
{
AcpiTbInitGenericAddress (&LocalFadt->XGpe0Blk,
0, (ACPI_PHYSICAL_ADDRESS) LocalFadt->V1_Gpe0Blk);
}
if (!(ACPI_GET_ADDRESS (LocalFadt->XGpe1Blk.Address)))
{
AcpiTbInitGenericAddress (&LocalFadt->XGpe1Blk,
0, (ACPI_PHYSICAL_ADDRESS) LocalFadt->V1_Gpe1Blk);
}
/* Create separate GAS structs for the PM1 Enable registers */
AcpiTbInitGenericAddress (&AcpiGbl_XPm1aEnable,
(UINT8) ACPI_DIV_2 (AcpiGbl_FADT->Pm1EvtLen),
(ACPI_PHYSICAL_ADDRESS) (ACPI_GET_ADDRESS (LocalFadt->XPm1aEvtBlk.Address) +
ACPI_DIV_2 (AcpiGbl_FADT->Pm1EvtLen)));
AcpiGbl_XPm1aEnable.AddressSpaceId = LocalFadt->XPm1aEvtBlk.AddressSpaceId;
/* PM1B is optional; leave null if not present */
if (ACPI_GET_ADDRESS (LocalFadt->XPm1bEvtBlk.Address))
{
AcpiTbInitGenericAddress (&AcpiGbl_XPm1bEnable,
(UINT8) ACPI_DIV_2 (AcpiGbl_FADT->Pm1EvtLen),
(ACPI_PHYSICAL_ADDRESS) (ACPI_GET_ADDRESS (LocalFadt->XPm1bEvtBlk.Address) +
ACPI_DIV_2 (AcpiGbl_FADT->Pm1EvtLen)));
AcpiGbl_XPm1bEnable.AddressSpaceId = LocalFadt->XPm1bEvtBlk.AddressSpaceId;
}
}
/*******************************************************************************
*
* FUNCTION: AcpiTbConvertTableFadt
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Converts a BIOS supplied ACPI 1.0 FADT to a local
* ACPI 2.0 FADT. If the BIOS supplied a 2.0 FADT then it is simply
* copied to the local FADT. The ACPI CA software uses this
* local FADT. Thus a significant amount of special #ifdef
* type codeing is saved.
*
******************************************************************************/
ACPI_STATUS
AcpiTbConvertTableFadt (void)
{
FADT_DESCRIPTOR_REV2 *LocalFadt;
ACPI_TABLE_DESC *TableDesc;
ACPI_FUNCTION_TRACE ("TbConvertTableFadt");
/*
* AcpiGbl_FADT is valid
* Allocate and zero the 2.0 FADT buffer
*/
LocalFadt = ACPI_MEM_CALLOCATE (sizeof (FADT_DESCRIPTOR_REV2));
if (LocalFadt == NULL)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
/*
* FADT length and version validation. The table must be at least as
* long as the version 1.0 FADT
*/
if (AcpiGbl_FADT->Header.Length < sizeof (FADT_DESCRIPTOR_REV1))
{
ACPI_REPORT_ERROR (("Invalid FADT table length: 0x%X\n", AcpiGbl_FADT->Header.Length));
return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH);
}
if (AcpiGbl_FADT->Header.Revision >= FADT2_REVISION_ID)
{
if (AcpiGbl_FADT->Header.Length < sizeof (FADT_DESCRIPTOR_REV2))
{
/* Length is too short to be a V2.0 table */
ACPI_REPORT_WARNING (("Inconsistent FADT length (0x%X) and revision (0x%X), using FADT V1.0 portion of table\n",
AcpiGbl_FADT->Header.Length, AcpiGbl_FADT->Header.Revision));
AcpiTbConvertFadt1 (LocalFadt, (void *) AcpiGbl_FADT);
}
else
{
/* Valid V2.0 table */
AcpiTbConvertFadt2 (LocalFadt, AcpiGbl_FADT);
}
}
else
{
/* Valid V1.0 table */
AcpiTbConvertFadt1 (LocalFadt, (void *) AcpiGbl_FADT);
}
/*
* Global FADT pointer will point to the new common V2.0 FADT
*/
AcpiGbl_FADT = LocalFadt;
AcpiGbl_FADT->Header.Length = sizeof (FADT_DESCRIPTOR);
/* Free the original table */
TableDesc = AcpiGbl_TableLists[ACPI_TABLE_FADT].Next;
AcpiTbDeleteSingleTable (TableDesc);
/* Install the new table */
TableDesc->Pointer = (ACPI_TABLE_HEADER *) AcpiGbl_FADT;
TableDesc->Allocation = ACPI_MEM_ALLOCATED;
TableDesc->Length = sizeof (FADT_DESCRIPTOR_REV2);
/* Dump the entire FADT */
ACPI_DEBUG_PRINT ((ACPI_DB_TABLES,
"Hex dump of common internal FADT, size %d (%X)\n",
AcpiGbl_FADT->Header.Length, AcpiGbl_FADT->Header.Length));
ACPI_DUMP_BUFFER ((UINT8 *) (AcpiGbl_FADT), AcpiGbl_FADT->Header.Length);
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiTbConvertTableFacs
*
* PARAMETERS: TableInfo - Info for currently installad FACS
*
* RETURN: Status
*
* DESCRIPTION: Convert ACPI 1.0 and ACPI 2.0 FACS to a common internal
* table format.
*
******************************************************************************/
ACPI_STATUS
AcpiTbBuildCommonFacs (
ACPI_TABLE_DESC *TableInfo)
{
ACPI_FUNCTION_TRACE ("TbBuildCommonFacs");
/* Absolute minimum length is 24, but the ACPI spec says 64 */
if (AcpiGbl_FACS->Length < 24)
{
ACPI_REPORT_ERROR (("Invalid FACS table length: 0x%X\n", AcpiGbl_FACS->Length));
return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH);
}
if (AcpiGbl_FACS->Length < 64)
{
ACPI_REPORT_WARNING (("FACS is shorter than the ACPI specification allows: 0x%X, using anyway\n",
AcpiGbl_FACS->Length));
}
/* Copy fields to the new FACS */
AcpiGbl_CommonFACS.GlobalLock = &(AcpiGbl_FACS->GlobalLock);
if ((AcpiGbl_RSDP->Revision < 2) ||
(AcpiGbl_FACS->Length < 32) ||
(!(ACPI_GET_ADDRESS (AcpiGbl_FACS->XFirmwareWakingVector))))
{
/* ACPI 1.0 FACS or short table or optional X_ field is zero */
AcpiGbl_CommonFACS.FirmwareWakingVector = ACPI_CAST_PTR (UINT64, &(AcpiGbl_FACS->FirmwareWakingVector));
AcpiGbl_CommonFACS.VectorWidth = 32;
}
else
{
/* ACPI 2.0 FACS with valid X_ field */
AcpiGbl_CommonFACS.FirmwareWakingVector = &AcpiGbl_FACS->XFirmwareWakingVector;
AcpiGbl_CommonFACS.VectorWidth = 64;
}
return_ACPI_STATUS (AE_OK);
}
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