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|
/******************************************************************************
*
* Module Name: tbget - ACPI Table get* routines
* $Revision: 56 $
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999, 2000, 2001, 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 __TBGET_C__
#include "acpi.h"
#include "achware.h"
#include "actables.h"
#define _COMPONENT ACPI_TABLES
MODULE_NAME ("tbget")
#define RSDP_CHECKSUM_LENGTH 20
/*******************************************************************************
*
* FUNCTION: AcpiTbGetTablePtr
*
* PARAMETERS: TableType - one of the defined table types
* Instance - Which table of this type
* TablePtrLoc - pointer to location to place the pointer for
* return
*
* RETURN: Status
*
* DESCRIPTION: This function is called to get the pointer to an ACPI table.
*
******************************************************************************/
ACPI_STATUS
AcpiTbGetTablePtr (
ACPI_TABLE_TYPE TableType,
UINT32 Instance,
ACPI_TABLE_HEADER **TablePtrLoc)
{
ACPI_TABLE_DESC *TableDesc;
UINT32 i;
FUNCTION_TRACE ("TbGetTablePtr");
if (!AcpiGbl_DSDT)
{
return_ACPI_STATUS (AE_NO_ACPI_TABLES);
}
if (TableType > ACPI_TABLE_MAX)
{
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/*
* For all table types (Single/Multiple), the first
* instance is always in the list head.
*/
if (Instance == 1)
{
/*
* Just pluck the pointer out of the global table!
* Will be null if no table is present
*/
*TablePtrLoc = AcpiGbl_AcpiTables[TableType].Pointer;
return_ACPI_STATUS (AE_OK);
}
/*
* Check for instance out of range
*/
if (Instance > AcpiGbl_AcpiTables[TableType].Count)
{
return_ACPI_STATUS (AE_NOT_EXIST);
}
/* Walk the list to get the desired table
* Since the if (Instance == 1) check above checked for the
* first table, setting TableDesc equal to the .Next member
* is actually pointing to the second table. Therefore, we
* need to walk from the 2nd table until we reach the Instance
* that the user is looking for and return its table pointer.
*/
TableDesc = AcpiGbl_AcpiTables[TableType].Next;
for (i = 2; i < Instance; i++)
{
TableDesc = TableDesc->Next;
}
/* We are now pointing to the requested table's descriptor */
*TablePtrLoc = TableDesc->Pointer;
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiTbGetTable
*
* PARAMETERS: PhysicalAddress - Physical address of table to retrieve
* *BufferPtr - If BufferPtr is valid, read data from
* buffer rather than searching memory
* *TableInfo - Where the table info is returned
*
* RETURN: Status
*
* DESCRIPTION: Maps the physical address of table into a logical address
*
******************************************************************************/
ACPI_STATUS
AcpiTbGetTable (
ACPI_PHYSICAL_ADDRESS PhysicalAddress,
ACPI_TABLE_HEADER *BufferPtr,
ACPI_TABLE_DESC *TableInfo)
{
ACPI_TABLE_HEADER *TableHeader = NULL;
ACPI_TABLE_HEADER *FullTable = NULL;
UINT32 Size;
UINT8 Allocation;
ACPI_STATUS Status = AE_OK;
FUNCTION_TRACE ("TbGetTable");
if (!TableInfo)
{
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
if (BufferPtr)
{
/*
* Getting data from a buffer, not BIOS tables
*/
TableHeader = BufferPtr;
Status = AcpiTbValidateTableHeader (TableHeader);
if (ACPI_FAILURE (Status))
{
/* Table failed verification, map all errors to BAD_DATA */
return_ACPI_STATUS (AE_BAD_DATA);
}
/* Allocate buffer for the entire table */
FullTable = ACPI_MEM_ALLOCATE (TableHeader->Length);
if (!FullTable)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* Copy the entire table (including header) to the local buffer */
Size = TableHeader->Length;
MEMCPY (FullTable, BufferPtr, Size);
/* Save allocation type */
Allocation = ACPI_MEM_ALLOCATED;
}
/*
* Not reading from a buffer, just map the table's physical memory
* into our address space.
*/
else
{
Size = SIZE_IN_HEADER;
Status = AcpiTbMapAcpiTable (PhysicalAddress, &Size, &FullTable);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Save allocation type */
Allocation = ACPI_MEM_MAPPED;
}
/* Return values */
TableInfo->Pointer = FullTable;
TableInfo->Length = Size;
TableInfo->Allocation = Allocation;
TableInfo->BasePointer = FullTable;
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiTbGetAllTables
*
* PARAMETERS: NumberOfTables - Number of tables to get
* TablePtr - Input buffer pointer, optional
*
* RETURN: Status
*
* DESCRIPTION: Load and validate all tables other than the RSDT. The RSDT must
* already be loaded and validated.
*
******************************************************************************/
ACPI_STATUS
AcpiTbGetAllTables (
UINT32 NumberOfTables,
ACPI_TABLE_HEADER *TablePtr)
{
ACPI_STATUS Status = AE_OK;
UINT32 Index;
ACPI_TABLE_DESC TableInfo;
FUNCTION_TRACE ("TbGetAllTables");
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Number of tables: %d\n", NumberOfTables));
/*
* Loop through all table pointers found in RSDT.
* This will NOT include the FACS and DSDT - we must get
* them after the loop
*/
for (Index = 0; Index < NumberOfTables; Index++)
{
/* Clear the TableInfo each time */
MEMSET (&TableInfo, 0, sizeof (ACPI_TABLE_DESC));
/* Get the table via the XSDT */
Status = AcpiTbGetTable ((ACPI_PHYSICAL_ADDRESS)
ACPI_GET_ADDRESS (AcpiGbl_XSDT->TableOffsetEntry[Index]),
TablePtr, &TableInfo);
/* Ignore a table that failed verification */
if (Status == AE_BAD_DATA)
{
continue;
}
/* However, abort on serious errors */
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Recognize and install the table */
Status = AcpiTbInstallTable (TablePtr, &TableInfo);
if (ACPI_FAILURE (Status))
{
/*
* Unrecognized or unsupported table, delete it and ignore the
* error. Just get as many tables as we can, later we will
* determine if there are enough tables to continue.
*/
AcpiTbUninstallTable (&TableInfo);
}
}
/*
* Convert the FADT to a common format. This allows earlier revisions of the
* table to coexist with newer versions, using common access code.
*/
Status = AcpiTbConvertTableFadt ();
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/*
* Get the minimum set of ACPI tables, namely:
*
* 1) FADT (via RSDT in loop above)
* 2) FACS
* 3) DSDT
*
*/
/*
* Get the FACS (must have the FADT first, from loop above)
* AcpiTbGetTableFacs will fail if FADT pointer is not valid
*/
Status = AcpiTbGetTableFacs (TablePtr, &TableInfo);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Install the FACS */
Status = AcpiTbInstallTable (TablePtr, &TableInfo);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/*
* Create the common FACS pointer table
* (Contains pointers to the original table)
*/
Status = AcpiTbBuildCommonFacs (&TableInfo);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/*
* Get the DSDT (We know that the FADT is valid now)
*/
Status = AcpiTbGetTable ((ACPI_PHYSICAL_ADDRESS) ACPI_GET_ADDRESS (AcpiGbl_FADT->XDsdt),
((AcpiGbl_DSDT) ?
AcpiGbl_DSDT: TablePtr), &TableInfo);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Install the DSDT */
Status = AcpiTbInstallTable (TablePtr, &TableInfo);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Dump the DSDT Header */
ACPI_DEBUG_PRINT ((ACPI_DB_TABLES, "Hex dump of DSDT Header:\n"));
DUMP_BUFFER ((UINT8 *) AcpiGbl_DSDT, sizeof (ACPI_TABLE_HEADER));
/* Dump the entire DSDT */
ACPI_DEBUG_PRINT ((ACPI_DB_TABLES,
"Hex dump of DSDT (After header), size %d (%x)\n",
AcpiGbl_DSDT->Length, AcpiGbl_DSDT->Length));
DUMP_BUFFER ((UINT8 *) (AcpiGbl_DSDT + 1), AcpiGbl_DSDT->Length);
/*
* Initialize the capabilities flags.
* Assumes that platform supports ACPI_MODE since we have tables!
*/
AcpiGbl_SystemFlags |= AcpiHwGetModeCapabilities ();
/* Always delete the RSDP mapping, we are done with it */
AcpiTbDeleteAcpiTable (ACPI_TABLE_RSDP);
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiTbVerifyRsdp
*
* PARAMETERS: NumberOfTables - Where the table count is placed
*
* RETURN: Status
*
* DESCRIPTION: Load and validate the RSDP (ptr) and RSDT (table)
*
******************************************************************************/
ACPI_STATUS
AcpiTbVerifyRsdp (
ACPI_PHYSICAL_ADDRESS RsdpPhysicalAddress)
{
ACPI_TABLE_DESC TableInfo;
ACPI_STATUS Status;
UINT8 *TablePtr;
FUNCTION_TRACE ("TbVerifyRsdp");
/*
* Obtain access to the RSDP structure
*/
Status = AcpiOsMapMemory (RsdpPhysicalAddress, sizeof (RSDP_DESCRIPTOR),
(void **) &TablePtr);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/*
* The signature and checksum must both be correct
*/
if (STRNCMP ((NATIVE_CHAR *) TablePtr, RSDP_SIG, sizeof (RSDP_SIG)-1) != 0)
{
/* Nope, BAD Signature */
Status = AE_BAD_SIGNATURE;
goto Cleanup;
}
if (AcpiTbChecksum (TablePtr, RSDP_CHECKSUM_LENGTH) != 0)
{
/* Nope, BAD Checksum */
Status = AE_BAD_CHECKSUM;
goto Cleanup;
}
/* TBD: Check extended checksum if table version >= 2 */
/* The RSDP supplied is OK */
TableInfo.Pointer = (ACPI_TABLE_HEADER *) TablePtr;
TableInfo.Length = sizeof (RSDP_DESCRIPTOR);
TableInfo.Allocation = ACPI_MEM_MAPPED;
TableInfo.BasePointer = TablePtr;
/* Save the table pointers and allocation info */
Status = AcpiTbInitTableDescriptor (ACPI_TABLE_RSDP, &TableInfo);
if (ACPI_FAILURE (Status))
{
goto Cleanup;
}
/* Save the RSDP in a global for easy access */
AcpiGbl_RSDP = (RSDP_DESCRIPTOR *) TableInfo.Pointer;
return_ACPI_STATUS (Status);
/* Error exit */
Cleanup:
AcpiOsUnmapMemory (TablePtr, sizeof (RSDP_DESCRIPTOR));
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiTbGetRsdtAddress
*
* PARAMETERS: None
*
* RETURN: RSDT physical address
*
* DESCRIPTION: Extract the address of the RSDT or XSDT, depending on the
* version of the RSDP
*
******************************************************************************/
ACPI_PHYSICAL_ADDRESS
AcpiTbGetRsdtAddress (void)
{
ACPI_PHYSICAL_ADDRESS PhysicalAddress;
FUNCTION_ENTRY ();
/*
* For RSDP revision 0 or 1, we use the RSDT.
* For RSDP revision 2 (and above), we use the XSDT
*/
if (AcpiGbl_RSDP->Revision < 2)
{
#ifdef _IA64
/* 0.71 RSDP has 64bit Rsdt address field */
PhysicalAddress = ((RSDP_DESCRIPTOR_REV071 *)AcpiGbl_RSDP)->RsdtPhysicalAddress;
#else
PhysicalAddress = (ACPI_PHYSICAL_ADDRESS) AcpiGbl_RSDP->RsdtPhysicalAddress;
#endif
}
else
{
PhysicalAddress = (ACPI_PHYSICAL_ADDRESS)
ACPI_GET_ADDRESS (AcpiGbl_RSDP->XsdtPhysicalAddress);
}
return (PhysicalAddress);
}
/*******************************************************************************
*
* FUNCTION: AcpiTbValidateRsdt
*
* PARAMETERS: TablePtr - Addressable pointer to the RSDT.
*
* RETURN: Status
*
* DESCRIPTION: Validate signature for the RSDT or XSDT
*
******************************************************************************/
ACPI_STATUS
AcpiTbValidateRsdt (
ACPI_TABLE_HEADER *TablePtr)
{
UINT32 NoMatch;
PROC_NAME ("TbValidateRsdt");
/*
* For RSDP revision 0 or 1, we use the RSDT.
* For RSDP revision 2 (and above), we use the XSDT
*/
if (AcpiGbl_RSDP->Revision < 2)
{
NoMatch = STRNCMP ((char *) TablePtr, RSDT_SIG,
sizeof (RSDT_SIG) -1);
}
else
{
NoMatch = STRNCMP ((char *) TablePtr, XSDT_SIG,
sizeof (XSDT_SIG) -1);
}
if (NoMatch)
{
/* Invalid RSDT or XSDT signature */
REPORT_ERROR (("Invalid signature where RSDP indicates RSDT/XSDT should be located\n"));
DUMP_BUFFER (AcpiGbl_RSDP, 20);
ACPI_DEBUG_PRINT_RAW ((ACPI_DB_ERROR,
"RSDT/XSDT signature at %X is invalid\n",
AcpiGbl_RSDP->RsdtPhysicalAddress));
return (AE_BAD_SIGNATURE);
}
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiTbGetTablePointer
*
* PARAMETERS: PhysicalAddress - Address from RSDT
* Flags - virtual or physical addressing
* TablePtr - Addressable address (output)
*
* RETURN: Status
*
* DESCRIPTION: Create an addressable pointer to an ACPI table
*
******************************************************************************/
ACPI_STATUS
AcpiTbGetTablePointer (
ACPI_PHYSICAL_ADDRESS PhysicalAddress,
UINT32 Flags,
UINT32 *Size,
ACPI_TABLE_HEADER **TablePtr)
{
ACPI_STATUS Status;
FUNCTION_ENTRY ();
if ((Flags & ACPI_MEMORY_MODE) == ACPI_LOGICAL_ADDRESSING)
{
*Size = SIZE_IN_HEADER;
Status = AcpiTbMapAcpiTable (PhysicalAddress, Size, TablePtr);
}
else
{
*Size = 0;
*TablePtr = (ACPI_TABLE_HEADER *) (ACPI_TBLPTR) PhysicalAddress;
Status = AE_OK;
}
return (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiTbGetTableRsdt
*
* PARAMETERS: NumberOfTables - Where the table count is placed
*
* RETURN: Status
*
* DESCRIPTION: Load and validate the RSDP (ptr) and RSDT (table)
*
******************************************************************************/
ACPI_STATUS
AcpiTbGetTableRsdt (
UINT32 *NumberOfTables)
{
ACPI_TABLE_DESC TableInfo;
ACPI_STATUS Status;
ACPI_PHYSICAL_ADDRESS PhysicalAddress;
FUNCTION_TRACE ("TbGetTableRsdt");
/*
* Get the RSDT from the RSDP
*/
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"RSDP located at %p, RSDT physical=%8.8X%8.8X \n",
AcpiGbl_RSDP, HIDWORD(AcpiGbl_RSDP->RsdtPhysicalAddress),
LODWORD(AcpiGbl_RSDP->RsdtPhysicalAddress)));
PhysicalAddress = AcpiTbGetRsdtAddress ();
/* Get the RSDT/XSDT */
Status = AcpiTbGetTable (PhysicalAddress, NULL, &TableInfo);
if (ACPI_FAILURE (Status))
{
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Could not get the RSDT, %s\n",
AcpiFormatException (Status)));
return_ACPI_STATUS (Status);
}
/* Check the RSDT or XSDT signature */
Status = AcpiTbValidateRsdt (TableInfo.Pointer);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/*
* Valid RSDT signature, verify the checksum. If it fails, just
* print a warning and ignore it.
*/
Status = AcpiTbVerifyTableChecksum (TableInfo.Pointer);
/* Convert and/or copy to an XSDT structure */
Status = AcpiTbConvertToXsdt (&TableInfo, NumberOfTables);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Save the table pointers and allocation info */
Status = AcpiTbInitTableDescriptor (ACPI_TABLE_XSDT, &TableInfo);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
AcpiGbl_XSDT = (XSDT_DESCRIPTOR *) TableInfo.Pointer;
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "XSDT located at %p\n", AcpiGbl_XSDT));
return_ACPI_STATUS (Status);
}
/******************************************************************************
*
* FUNCTION: AcpiTbGetTableFacs
*
* PARAMETERS: *BufferPtr - If BufferPtr is valid, read data from
* buffer rather than searching memory
* *TableInfo - Where the table info is returned
*
* RETURN: Status
*
* DESCRIPTION: Returns a pointer to the FACS as defined in FADT. This
* function assumes the global variable FADT has been
* correctly initialized. The value of FADT->FirmwareCtrl
* into a far pointer which is returned.
*
*****************************************************************************/
ACPI_STATUS
AcpiTbGetTableFacs (
ACPI_TABLE_HEADER *BufferPtr,
ACPI_TABLE_DESC *TableInfo)
{
ACPI_TABLE_HEADER *TablePtr = NULL;
UINT32 Size;
UINT8 Allocation;
ACPI_STATUS Status = AE_OK;
FUNCTION_TRACE ("TbGetTableFacs");
/* Must have a valid FADT pointer */
if (!AcpiGbl_FADT)
{
return_ACPI_STATUS (AE_NO_ACPI_TABLES);
}
Size = sizeof (FACS_DESCRIPTOR);
if (BufferPtr)
{
/*
* Getting table from a file -- allocate a buffer and
* read the table.
*/
TablePtr = ACPI_MEM_ALLOCATE (Size);
if(!TablePtr)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
MEMCPY (TablePtr, BufferPtr, Size);
/* Save allocation type */
Allocation = ACPI_MEM_ALLOCATED;
}
else
{
/* Just map the physical memory to our address space */
Status = AcpiTbMapAcpiTable ((ACPI_PHYSICAL_ADDRESS) ACPI_GET_ADDRESS (AcpiGbl_FADT->XFirmwareCtrl),
&Size, &TablePtr);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Save allocation type */
Allocation = ACPI_MEM_MAPPED;
}
/* Return values */
TableInfo->Pointer = TablePtr;
TableInfo->Length = Size;
TableInfo->Allocation = Allocation;
TableInfo->BasePointer = TablePtr;
return_ACPI_STATUS (Status);
}
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