BOOLEAN
ApIsValidChecksum (
ACPI_TABLE_HEADER *Table)
{
ACPI_STATUS Status;
ACPI_TABLE_RSDP *Rsdp;
if (ACPI_VALIDATE_RSDP_SIG (Table->Signature))
{
/*
* Checksum for RSDP.
* Note: Other checksums are computed during the table dump.
*/
Rsdp = ACPI_CAST_PTR (ACPI_TABLE_RSDP, Table);
Status = AcpiTbValidateRsdp (Rsdp);
}
else
{
Status = AcpiTbVerifyChecksum (Table, Table->Length);
}
if (ACPI_FAILURE (Status))
{
AcpiLogError ("%4.4s: Warning: wrong checksum in table\n",
Table->Signature);
}
return (AE_OK);
}
void
AcpiTbParseFadt (
void)
{
UINT32 Length;
ACPI_TABLE_HEADER *Table;
/*
* 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.
*/
Length = AcpiGbl_RootTableList.Tables[AcpiGbl_FadtIndex].Length;
Table = AcpiOsMapMemory (
AcpiGbl_RootTableList.Tables[AcpiGbl_FadtIndex].Address, Length);
if (!Table)
{
return;
}
/*
* Validate the FADT checksum before we copy the table. Ignore
* checksum error as we want to try to get the DSDT and FACS.
*/
(void) AcpiTbVerifyChecksum (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 */
AcpiOsUnmapMemory (Table, Length);
/* Obtain the DSDT and FACS tables via their addresses within the FADT */
AcpiTbInstallFixedTable ((ACPI_PHYSICAL_ADDRESS) AcpiGbl_FADT.XDsdt,
ACPI_SIG_DSDT, &AcpiGbl_DsdtIndex);
/* If Hardware Reduced flag is set, there is no FACS */
if (!AcpiGbl_ReducedHardware)
{
if (AcpiGbl_FADT.Facs)
{
AcpiTbInstallFixedTable ((ACPI_PHYSICAL_ADDRESS) AcpiGbl_FADT.Facs,
ACPI_SIG_FACS, &AcpiGbl_FacsIndex);
}
if (AcpiGbl_FADT.XFacs)
{
AcpiTbInstallFixedTable ((ACPI_PHYSICAL_ADDRESS) AcpiGbl_FADT.XFacs,
ACPI_SIG_FACS, &AcpiGbl_XFacsIndex);
}
}
}
ACPI_STATUS
AcpiTbVerifyTempTable (
ACPI_TABLE_DESC *TableDesc,
char *Signature)
{
ACPI_STATUS Status = AE_OK;
ACPI_FUNCTION_TRACE (TbVerifyTempTable);
/* Validate the table */
Status = AcpiTbValidateTempTable (TableDesc);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* If a particular signature is expected (DSDT/FACS), it must match */
if (Signature &&
!ACPI_COMPARE_NAME (&TableDesc->Signature, Signature))
{
ACPI_BIOS_ERROR ((AE_INFO,
"Invalid signature 0x%X for ACPI table, expected [%s]",
TableDesc->Signature.Integer, Signature));
Status = AE_BAD_SIGNATURE;
goto InvalidateAndExit;
}
/* Verify the checksum */
if (AcpiGbl_VerifyTableChecksum)
{
Status = AcpiTbVerifyChecksum (TableDesc->Pointer, TableDesc->Length);
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, AE_NO_MEMORY,
"%4.4s 0x%8.8X%8.8X"
" Attempted table install failed",
AcpiUtValidAcpiName (TableDesc->Signature.Ascii) ?
TableDesc->Signature.Ascii : "????",
ACPI_FORMAT_UINT64 (TableDesc->Address)));
goto InvalidateAndExit;
}
}
return_ACPI_STATUS (AE_OK);
InvalidateAndExit:
AcpiTbInvalidateTable (TableDesc);
return_ACPI_STATUS (Status);
}
void
AcpiTbParseFadt (
ACPI_NATIVE_UINT TableIndex,
UINT8 Flags)
{
UINT32 Length;
ACPI_TABLE_HEADER *Table;
/*
* 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.
*/
Length = AcpiGbl_RootTableList.Tables[TableIndex].Length;
Table = AcpiOsMapMemory (
AcpiGbl_RootTableList.Tables[TableIndex].Address, Length);
if (!Table)
{
return;
}
/*
* Validate the FADT checksum before we copy the table. Ignore
* checksum error as we want to try to get the DSDT and FACS.
*/
(void) AcpiTbVerifyChecksum (Table, Length);
/* Obtain a local copy of the FADT in common ACPI 2.0+ format */
AcpiTbCreateLocalFadt (Table, Length);
/* All done with the real FADT, unmap it */
AcpiOsUnmapMemory (Table, Length);
/* Obtain the DSDT and FACS tables via their addresses within the FADT */
AcpiTbInstallTable ((ACPI_PHYSICAL_ADDRESS) AcpiGbl_FADT.XDsdt,
Flags, ACPI_SIG_DSDT, ACPI_TABLE_INDEX_DSDT);
AcpiTbInstallTable ((ACPI_PHYSICAL_ADDRESS) AcpiGbl_FADT.XFacs,
Flags, ACPI_SIG_FACS, ACPI_TABLE_INDEX_FACS);
}
ACPI_STATUS
AcpiTbVerifyTable (
ACPI_TABLE_DESC *TableDesc)
{
ACPI_STATUS Status = AE_OK;
ACPI_FUNCTION_TRACE (TbVerifyTable);
/* Map the table if necessary */
if (!TableDesc->Pointer)
{
if ((TableDesc->Flags & ACPI_TABLE_ORIGIN_MASK) ==
ACPI_TABLE_ORIGIN_MAPPED)
{
TableDesc->Pointer = AcpiOsMapMemory (
TableDesc->Address, TableDesc->Length);
}
if (!TableDesc->Pointer)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
}
/* FACS is the odd table, has no standard ACPI header and no checksum */
if (!ACPI_COMPARE_NAME (&TableDesc->Signature, ACPI_SIG_FACS))
{
/* Always calculate checksum, ignore bad checksum if requested */
Status = AcpiTbVerifyChecksum (TableDesc->Pointer, TableDesc->Length);
}
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiTbParseRootTable (
ACPI_PHYSICAL_ADDRESS RsdpAddress)
{
ACPI_TABLE_RSDP *Rsdp;
UINT32 TableEntrySize;
UINT32 i;
UINT32 TableCount;
ACPI_TABLE_HEADER *Table;
ACPI_PHYSICAL_ADDRESS Address;
UINT32 Length;
UINT8 *TableEntry;
ACPI_STATUS Status;
UINT32 TableIndex;
ACPI_FUNCTION_TRACE (TbParseRootTable);
/* Map the entire RSDP and extract the address of the RSDT or XSDT */
Rsdp = AcpiOsMapMemory (RsdpAddress, sizeof (ACPI_TABLE_RSDP));
if (!Rsdp)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
AcpiTbPrintTableHeader (RsdpAddress,
ACPI_CAST_PTR (ACPI_TABLE_HEADER, Rsdp));
/* Use XSDT if present and not overridden. Otherwise, use RSDT */
if ((Rsdp->Revision > 1) &&
Rsdp->XsdtPhysicalAddress &&
!AcpiGbl_DoNotUseXsdt)
{
/*
* RSDP contains an XSDT (64-bit physical addresses). We must use
* the XSDT if the revision is > 1 and the XSDT pointer is present,
* as per the ACPI specification.
*/
Address = (ACPI_PHYSICAL_ADDRESS) Rsdp->XsdtPhysicalAddress;
TableEntrySize = ACPI_XSDT_ENTRY_SIZE;
}
else
{
/* Root table is an RSDT (32-bit physical addresses) */
Address = (ACPI_PHYSICAL_ADDRESS) Rsdp->RsdtPhysicalAddress;
TableEntrySize = ACPI_RSDT_ENTRY_SIZE;
}
/*
* It is not possible to map more than one entry in some environments,
* so unmap the RSDP here before mapping other tables
*/
AcpiOsUnmapMemory (Rsdp, sizeof (ACPI_TABLE_RSDP));
/* Map the RSDT/XSDT table header to get the full table length */
Table = AcpiOsMapMemory (Address, sizeof (ACPI_TABLE_HEADER));
if (!Table)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
AcpiTbPrintTableHeader (Address, Table);
/*
* Validate length of the table, and map entire table.
* Minimum length table must contain at least one entry.
*/
Length = Table->Length;
AcpiOsUnmapMemory (Table, sizeof (ACPI_TABLE_HEADER));
if (Length < (sizeof (ACPI_TABLE_HEADER) + TableEntrySize))
{
ACPI_BIOS_ERROR ((AE_INFO,
"Invalid table length 0x%X in RSDT/XSDT", Length));
return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH);
}
Table = AcpiOsMapMemory (Address, Length);
if (!Table)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* Validate the root table checksum */
Status = AcpiTbVerifyChecksum (Table, Length);
if (ACPI_FAILURE (Status))
{
AcpiOsUnmapMemory (Table, Length);
return_ACPI_STATUS (Status);
}
/* Get the number of entries and pointer to first entry */
TableCount = (UINT32) ((Table->Length - sizeof (ACPI_TABLE_HEADER)) /
TableEntrySize);
TableEntry = ACPI_ADD_PTR (UINT8, Table, sizeof (ACPI_TABLE_HEADER));
/* Initialize the root table array from the RSDT/XSDT */
for (i = 0; i < TableCount; i++)
{
/* Get the table physical address (32-bit for RSDT, 64-bit for XSDT) */
Address = AcpiTbGetRootTableEntry (TableEntry, TableEntrySize);
/* Skip NULL entries in RSDT/XSDT */
if (!Address)
{
goto NextTable;
}
Status = AcpiTbInstallStandardTable (Address,
ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL, FALSE, TRUE, &TableIndex);
if (ACPI_SUCCESS (Status) &&
ACPI_COMPARE_NAME (
&AcpiGbl_RootTableList.Tables[TableIndex].Signature,
ACPI_SIG_FADT))
{
AcpiGbl_FadtIndex = TableIndex;
AcpiTbParseFadt ();
}
NextTable:
TableEntry += TableEntrySize;
}
AcpiOsUnmapMemory (Table, Length);
return_ACPI_STATUS (AE_OK);
}
ACPI_STATUS
AcpiExLoadOp (
ACPI_OPERAND_OBJECT *ObjDesc,
ACPI_OPERAND_OBJECT *Target,
ACPI_WALK_STATE *WalkState)
{
ACPI_OPERAND_OBJECT *DdbHandle;
ACPI_TABLE_HEADER *Table;
ACPI_TABLE_DESC TableDesc;
UINT32 TableIndex;
ACPI_STATUS Status;
UINT32 Length;
ACPI_FUNCTION_TRACE (ExLoadOp);
ACPI_MEMSET (&TableDesc, 0, sizeof (ACPI_TABLE_DESC));
/* Source Object can be either an OpRegion or a Buffer/Field */
switch (ObjDesc->Common.Type)
{
case ACPI_TYPE_REGION:
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"Load table from Region %p\n", ObjDesc));
/* Region must be SystemMemory (from ACPI spec) */
if (ObjDesc->Region.SpaceId != ACPI_ADR_SPACE_SYSTEM_MEMORY)
{
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
}
/*
* If the Region Address and Length have not been previously evaluated,
* evaluate them now and save the results.
*/
if (!(ObjDesc->Common.Flags & AOPOBJ_DATA_VALID))
{
Status = AcpiDsGetRegionArguments (ObjDesc);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
}
/* Get the table header first so we can get the table length */
Table = ACPI_ALLOCATE (sizeof (ACPI_TABLE_HEADER));
if (!Table)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
Status = AcpiExRegionRead (ObjDesc, sizeof (ACPI_TABLE_HEADER),
ACPI_CAST_PTR (UINT8, Table));
Length = Table->Length;
ACPI_FREE (Table);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Must have at least an ACPI table header */
if (Length < sizeof (ACPI_TABLE_HEADER))
{
return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH);
}
/*
* The original implementation simply mapped the table, with no copy.
* However, the memory region is not guaranteed to remain stable and
* we must copy the table to a local buffer. For example, the memory
* region is corrupted after suspend on some machines. Dynamically
* loaded tables are usually small, so this overhead is minimal.
*
* The latest implementation (5/2009) does not use a mapping at all.
* We use the low-level operation region interface to read the table
* instead of the obvious optimization of using a direct mapping.
* This maintains a consistent use of operation regions across the
* entire subsystem. This is important if additional processing must
* be performed in the (possibly user-installed) operation region
* handler. For example, AcpiExec and ASLTS depend on this.
*/
/* Allocate a buffer for the table */
TableDesc.Pointer = ACPI_ALLOCATE (Length);
if (!TableDesc.Pointer)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* Read the entire table */
Status = AcpiExRegionRead (ObjDesc, Length,
ACPI_CAST_PTR (UINT8, TableDesc.Pointer));
if (ACPI_FAILURE (Status))
{
ACPI_FREE (TableDesc.Pointer);
return_ACPI_STATUS (Status);
}
TableDesc.Address = ObjDesc->Region.Address;
break;
case ACPI_TYPE_BUFFER: /* Buffer or resolved RegionField */
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"Load table from Buffer or Field %p\n", ObjDesc));
/* Must have at least an ACPI table header */
if (ObjDesc->Buffer.Length < sizeof (ACPI_TABLE_HEADER))
{
return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH);
}
/* Get the actual table length from the table header */
Table = ACPI_CAST_PTR (ACPI_TABLE_HEADER, ObjDesc->Buffer.Pointer);
Length = Table->Length;
/* Table cannot extend beyond the buffer */
if (Length > ObjDesc->Buffer.Length)
{
return_ACPI_STATUS (AE_AML_BUFFER_LIMIT);
}
if (Length < sizeof (ACPI_TABLE_HEADER))
{
return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH);
}
/*
* Copy the table from the buffer because the buffer could be modified
* or even deleted in the future
*/
TableDesc.Pointer = ACPI_ALLOCATE (Length);
if (!TableDesc.Pointer)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
ACPI_MEMCPY (TableDesc.Pointer, Table, Length);
TableDesc.Address = ACPI_TO_INTEGER (TableDesc.Pointer);
break;
default:
return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
}
/* Validate table checksum (will not get validated in TbAddTable) */
Status = AcpiTbVerifyChecksum (TableDesc.Pointer, Length);
if (ACPI_FAILURE (Status))
{
ACPI_FREE (TableDesc.Pointer);
return_ACPI_STATUS (Status);
}
/* Complete the table descriptor */
TableDesc.Length = Length;
TableDesc.Flags = ACPI_TABLE_ORIGIN_ALLOCATED;
/* Install the new table into the local data structures */
Status = AcpiTbAddTable (&TableDesc, &TableIndex);
if (ACPI_FAILURE (Status))
{
/* Delete allocated table buffer */
AcpiTbDeleteTable (&TableDesc);
return_ACPI_STATUS (Status);
}
/*
* Add the table to the namespace.
*
* Note: Load the table objects relative to the root of the namespace.
* This appears to go against the ACPI specification, but we do it for
* compatibility with other ACPI implementations.
*/
Status = AcpiExAddTable (TableIndex, AcpiGbl_RootNode, &DdbHandle);
if (ACPI_FAILURE (Status))
{
/* On error, TablePtr was deallocated above */
return_ACPI_STATUS (Status);
}
/* Store the DdbHandle into the Target operand */
Status = AcpiExStore (DdbHandle, Target, WalkState);
if (ACPI_FAILURE (Status))
{
(void) AcpiExUnloadTable (DdbHandle);
/* TablePtr was deallocated above */
AcpiUtRemoveReference (DdbHandle);
return_ACPI_STATUS (Status);
}
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Dynamic OEM Table Load:"));
AcpiTbPrintTableHeader (0, TableDesc.Pointer);
/* Remove the reference by added by AcpiExStore above */
AcpiUtRemoveReference (DdbHandle);
/* Invoke table handler if present */
if (AcpiGbl_TableHandler)
{
(void) AcpiGbl_TableHandler (ACPI_TABLE_EVENT_LOAD, TableDesc.Pointer,
AcpiGbl_TableHandlerContext);
}
return_ACPI_STATUS (Status);
}
static ACPI_STATUS
AcGetOneTableFromFile (
char *Filename,
FILE *File,
UINT8 GetOnlyAmlTables,
ACPI_TABLE_HEADER **ReturnTable)
{
ACPI_STATUS Status = AE_OK;
ACPI_TABLE_HEADER TableHeader;
ACPI_TABLE_HEADER *Table;
INT32 Count;
long TableOffset;
*ReturnTable = NULL;
/* Get the table header to examine signature and length */
TableOffset = ftell (File);
Count = fread (&TableHeader, 1, sizeof (ACPI_TABLE_HEADER), File);
if (Count != sizeof (ACPI_TABLE_HEADER))
{
return (AE_CTRL_TERMINATE);
}
/* Validate the table signature/header (limited ASCII chars) */
Status = AcValidateTableHeader (File, TableOffset);
if (ACPI_FAILURE (Status))
{
return (Status);
}
if (GetOnlyAmlTables)
{
/*
* Table must be an AML table (DSDT/SSDT).
* Used for iASL -e option only.
*/
if (!AcpiUtIsAmlTable (&TableHeader))
{
fprintf (stderr,
" %s: Table [%4.4s] is not an AML table - ignoring\n",
Filename, TableHeader.Signature);
return (AE_TYPE);
}
}
/* Allocate a buffer for the entire table */
Table = AcpiOsAllocate ((ACPI_SIZE) TableHeader.Length);
if (!Table)
{
return (AE_NO_MEMORY);
}
/* Read the entire ACPI table, including header */
fseek (File, TableOffset, SEEK_SET);
Count = fread (Table, 1, TableHeader.Length, File);
if (Count != (INT32) TableHeader.Length)
{
Status = AE_ERROR;
goto ErrorExit;
}
/* Validate the checksum (just issue a warning) */
Status = AcpiTbVerifyChecksum (Table, TableHeader.Length);
if (ACPI_FAILURE (Status))
{
Status = AcCheckTextModeCorruption (Table);
if (ACPI_FAILURE (Status))
{
goto ErrorExit;
}
}
*ReturnTable = Table;
return (AE_OK);
ErrorExit:
AcpiOsFree (Table);
return (Status);
}
ACPI_STATUS
AcpiTbVerifyTempTable (
ACPI_TABLE_DESC *TableDesc,
char *Signature,
UINT32 *TableIndex)
{
ACPI_STATUS Status = AE_OK;
ACPI_FUNCTION_TRACE (TbVerifyTempTable);
/* Validate the table */
Status = AcpiTbValidateTempTable (TableDesc);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
/* If a particular signature is expected (DSDT/FACS), it must match */
if (Signature &&
!ACPI_COMPARE_NAME (&TableDesc->Signature, Signature))
{
ACPI_BIOS_ERROR ((AE_INFO,
"Invalid signature 0x%X for ACPI table, expected [%s]",
TableDesc->Signature.Integer, Signature));
Status = AE_BAD_SIGNATURE;
goto InvalidateAndExit;
}
if (AcpiGbl_EnableTableValidation)
{
/* Verify the checksum */
Status = AcpiTbVerifyChecksum (TableDesc->Pointer, TableDesc->Length);
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, AE_NO_MEMORY,
"%4.4s 0x%8.8X%8.8X"
" Attempted table install failed",
AcpiUtValidNameseg (TableDesc->Signature.Ascii) ?
TableDesc->Signature.Ascii : "????",
ACPI_FORMAT_UINT64 (TableDesc->Address)));
goto InvalidateAndExit;
}
/* Avoid duplications */
if (TableIndex)
{
Status = AcpiTbCheckDuplication (TableDesc, TableIndex);
if (ACPI_FAILURE (Status))
{
if (Status != AE_CTRL_TERMINATE)
{
ACPI_EXCEPTION ((AE_INFO, AE_NO_MEMORY,
"%4.4s 0x%8.8X%8.8X"
" Table is duplicated",
AcpiUtValidNameseg (TableDesc->Signature.Ascii) ?
TableDesc->Signature.Ascii : "????",
ACPI_FORMAT_UINT64 (TableDesc->Address)));
}
goto InvalidateAndExit;
}
}
TableDesc->Flags |= ACPI_TABLE_IS_VERIFIED;
}
return_ACPI_STATUS (Status);
InvalidateAndExit:
AcpiTbInvalidateTable (TableDesc);
return_ACPI_STATUS (Status);
}
static ACPI_STATUS
AcpiUtReadTable (
FILE *fp,
ACPI_TABLE_HEADER **Table,
UINT32 *TableLength)
{
ACPI_TABLE_HEADER TableHeader;
UINT32 Actual;
ACPI_STATUS Status;
UINT32 FileSize;
BOOLEAN StandardHeader = TRUE;
INT32 Count;
/* Get the file size */
FileSize = CmGetFileSize (fp);
if (FileSize == ACPI_UINT32_MAX)
{
return (AE_ERROR);
}
if (FileSize < 4)
{
return (AE_BAD_HEADER);
}
/* Read the signature */
fseek (fp, 0, SEEK_SET);
Count = fread (&TableHeader, 1, sizeof (ACPI_TABLE_HEADER), fp);
if (Count != sizeof (ACPI_TABLE_HEADER))
{
AcpiOsPrintf ("Could not read the table header\n");
return (AE_BAD_HEADER);
}
/* The RSDP table does not have standard ACPI header */
if (ACPI_VALIDATE_RSDP_SIG (TableHeader.Signature))
{
*TableLength = FileSize;
StandardHeader = FALSE;
}
else
{
#if 0
/* Validate the table header/length */
Status = AcpiTbValidateTableHeader (&TableHeader);
if (ACPI_FAILURE (Status))
{
AcpiOsPrintf ("Table header is invalid!\n");
return (Status);
}
#endif
/* File size must be at least as long as the Header-specified length */
if (TableHeader.Length > FileSize)
{
AcpiOsPrintf (
"TableHeader length [0x%X] greater than the input file size [0x%X]\n",
TableHeader.Length, FileSize);
#ifdef ACPI_ASL_COMPILER
AcpiOsPrintf ("File is corrupt or is ASCII text -- "
"it must be a binary file\n");
#endif
return (AE_BAD_HEADER);
}
#ifdef ACPI_OBSOLETE_CODE
/* We only support a limited number of table types */
if (!ACPI_COMPARE_NAME ((char *) TableHeader.Signature, ACPI_SIG_DSDT) &&
!ACPI_COMPARE_NAME ((char *) TableHeader.Signature, ACPI_SIG_PSDT) &&
!ACPI_COMPARE_NAME ((char *) TableHeader.Signature, ACPI_SIG_SSDT))
{
AcpiOsPrintf ("Table signature [%4.4s] is invalid or not supported\n",
(char *) TableHeader.Signature);
ACPI_DUMP_BUFFER (&TableHeader, sizeof (ACPI_TABLE_HEADER));
return (AE_ERROR);
}
#endif
*TableLength = TableHeader.Length;
}
/* Allocate a buffer for the table */
*Table = AcpiOsAllocate ((size_t) FileSize);
if (!*Table)
{
AcpiOsPrintf (
"Could not allocate memory for ACPI table %4.4s (size=0x%X)\n",
TableHeader.Signature, *TableLength);
return (AE_NO_MEMORY);
}
/* Get the rest of the table */
fseek (fp, 0, SEEK_SET);
Actual = fread (*Table, 1, (size_t) FileSize, fp);
if (Actual == FileSize)
{
if (StandardHeader)
{
/* Now validate the checksum */
Status = AcpiTbVerifyChecksum ((void *) *Table,
ACPI_CAST_PTR (ACPI_TABLE_HEADER, *Table)->Length);
if (Status == AE_BAD_CHECKSUM)
{
Status = AcpiUtCheckTextModeCorruption ((UINT8 *) *Table,
FileSize, (*Table)->Length);
return (Status);
}
}
return (AE_OK);
}
if (Actual > 0)
{
AcpiOsPrintf ("Warning - reading table, asked for %X got %X\n",
FileSize, Actual);
return (AE_OK);
}
AcpiOsPrintf ("Error - could not read the table file\n");
AcpiOsFree (*Table);
*Table = NULL;
*TableLength = 0;
return (AE_ERROR);
}
static ACPI_STATUS
AcpiDbReadTable (
FILE *fp,
ACPI_TABLE_HEADER **Table,
UINT32 *TableLength)
{
ACPI_TABLE_HEADER TableHeader;
UINT32 Actual;
ACPI_STATUS Status;
UINT32 FileSize;
BOOLEAN StandardHeader = TRUE;
/* Get the file size */
fseek (fp, 0, SEEK_END);
FileSize = (UINT32) ftell (fp);
fseek (fp, 0, SEEK_SET);
if (FileSize < 4)
{
return (AE_BAD_HEADER);
}
/* Read the signature */
if (fread (&TableHeader, 1, 4, fp) != 4)
{
AcpiOsPrintf ("Could not read the table signature\n");
return (AE_BAD_HEADER);
}
fseek (fp, 0, SEEK_SET);
/* The RSDT, FACS and S3PT tables do not have standard ACPI headers */
if (ACPI_COMPARE_NAME (TableHeader.Signature, "RSD ") ||
ACPI_COMPARE_NAME (TableHeader.Signature, "FACS") ||
ACPI_COMPARE_NAME (TableHeader.Signature, "S3PT"))
{
*TableLength = FileSize;
StandardHeader = FALSE;
}
else
{
/* Read the table header */
if (fread (&TableHeader, 1, sizeof (TableHeader), fp) !=
sizeof (ACPI_TABLE_HEADER))
{
AcpiOsPrintf ("Could not read the table header\n");
return (AE_BAD_HEADER);
}
#if 0
/* Validate the table header/length */
Status = AcpiTbValidateTableHeader (&TableHeader);
if (ACPI_FAILURE (Status))
{
AcpiOsPrintf ("Table header is invalid!\n");
return (Status);
}
#endif
/* File size must be at least as long as the Header-specified length */
if (TableHeader.Length > FileSize)
{
AcpiOsPrintf (
"TableHeader length [0x%X] greater than the input file size [0x%X]\n",
TableHeader.Length, FileSize);
return (AE_BAD_HEADER);
}
#ifdef ACPI_OBSOLETE_CODE
/* We only support a limited number of table types */
if (ACPI_STRNCMP ((char *) TableHeader.Signature, DSDT_SIG, 4) &&
ACPI_STRNCMP ((char *) TableHeader.Signature, PSDT_SIG, 4) &&
ACPI_STRNCMP ((char *) TableHeader.Signature, SSDT_SIG, 4))
{
AcpiOsPrintf ("Table signature [%4.4s] is invalid or not supported\n",
(char *) TableHeader.Signature);
ACPI_DUMP_BUFFER (&TableHeader, sizeof (ACPI_TABLE_HEADER));
return (AE_ERROR);
}
#endif
*TableLength = TableHeader.Length;
}
/* Allocate a buffer for the table */
*Table = AcpiOsAllocate ((size_t) FileSize);
if (!*Table)
{
AcpiOsPrintf (
"Could not allocate memory for ACPI table %4.4s (size=0x%X)\n",
TableHeader.Signature, *TableLength);
return (AE_NO_MEMORY);
}
/* Get the rest of the table */
fseek (fp, 0, SEEK_SET);
Actual = fread (*Table, 1, (size_t) FileSize, fp);
if (Actual == FileSize)
{
if (StandardHeader)
{
/* Now validate the checksum */
Status = AcpiTbVerifyChecksum ((void *) *Table,
ACPI_CAST_PTR (ACPI_TABLE_HEADER, *Table)->Length);
if (Status == AE_BAD_CHECKSUM)
{
Status = AcpiDbCheckTextModeCorruption ((UINT8 *) *Table,
FileSize, (*Table)->Length);
return (Status);
}
}
return (AE_OK);
}
if (Actual > 0)
{
AcpiOsPrintf ("Warning - reading table, asked for %X got %X\n",
FileSize, Actual);
return (AE_OK);
}
AcpiOsPrintf ("Error - could not read the table file\n");
AcpiOsFree (*Table);
*Table = NULL;
*TableLength = 0;
return (AE_ERROR);
}
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) AcpiTbVerifyChecksum (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, 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, FALSE, TRUE,
&AcpiGbl_FacsIndex);
}
if (AcpiGbl_FADT.XFacs)
{
AcpiTbInstallStandardTable (
(ACPI_PHYSICAL_ADDRESS) AcpiGbl_FADT.XFacs,
ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL, FALSE, TRUE,
&AcpiGbl_XFacsIndex);
}
}
}