ACPI_STATUS
AcpiGetTable (
char *Signature,
UINT32 Instance,
ACPI_TABLE_HEADER **OutTable)
{
UINT32 i;
UINT32 j;
ACPI_STATUS Status = AE_NOT_FOUND;
ACPI_TABLE_DESC *TableDesc;
/* Parameter validation */
if (!Signature || !OutTable)
{
return (AE_BAD_PARAMETER);
}
/*
* Note that the following line is required by some OSPMs, they only
* check if the returned table is NULL instead of the returned status
* to determined if this function is succeeded.
*/
*OutTable = NULL;
(void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
/* Walk the root table list */
for (i = 0, j = 0; i < AcpiGbl_RootTableList.CurrentTableCount; i++)
{
TableDesc = &AcpiGbl_RootTableList.Tables[i];
if (!ACPI_COMPARE_NAME (&TableDesc->Signature, Signature))
{
continue;
}
if (++j < Instance)
{
continue;
}
Status = AcpiTbGetTable (TableDesc, OutTable);
break;
}
(void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
return (Status);
}
ACPI_STATUS
AcpiGetTableByIndex (
UINT32 TableIndex,
ACPI_TABLE_HEADER **OutTable)
{
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (AcpiGetTableByIndex);
/* Parameter validation */
if (!OutTable)
{
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/*
* Note that the following line is required by some OSPMs, they only
* check if the returned table is NULL instead of the returned status
* to determined if this function is succeeded.
*/
*OutTable = NULL;
(void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
/* Validate index */
if (TableIndex >= AcpiGbl_RootTableList.CurrentTableCount)
{
Status = AE_BAD_PARAMETER;
goto UnlockAndExit;
}
Status = AcpiTbGetTable (
&AcpiGbl_RootTableList.Tables[TableIndex], OutTable);
UnlockAndExit:
(void) AcpiUtReleaseMutex (ACPI_MTX_TABLES);
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiGetFirmwareTable (
ACPI_STRING Signature,
UINT32 Instance,
UINT32 Flags,
ACPI_TABLE_HEADER **TablePointer)
{
ACPI_POINTER RsdpAddress;
ACPI_POINTER Address;
ACPI_STATUS Status;
ACPI_TABLE_HEADER Header;
ACPI_TABLE_DESC TableInfo;
ACPI_TABLE_DESC RsdtInfo;
UINT32 TableCount;
UINT32 i;
UINT32 j;
ACPI_FUNCTION_TRACE ("AcpiGetFirmwareTable");
/*
* Ensure that at least the table manager is initialized. We don't
* require that the entire ACPI subsystem is up for this interface
*/
/*
* If we have a buffer, we must have a length too
*/
if ((Instance == 0) ||
(!Signature) ||
(!TablePointer))
{
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
RsdtInfo.Pointer = NULL;
if (!AcpiGbl_RSDP)
{
/* Get the RSDP */
Status = AcpiOsGetRootPointer (Flags, &RsdpAddress);
if (ACPI_FAILURE (Status))
{
ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "RSDP not found\n"));
return_ACPI_STATUS (AE_NO_ACPI_TABLES);
}
/* Map and validate the RSDP */
if ((Flags & ACPI_MEMORY_MODE) == ACPI_LOGICAL_ADDRESSING)
{
Status = AcpiOsMapMemory (RsdpAddress.Pointer.Physical, sizeof (RSDP_DESCRIPTOR),
(void **) &AcpiGbl_RSDP);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
}
else
{
AcpiGbl_RSDP = RsdpAddress.Pointer.Logical;
}
/*
* The signature and checksum must both be correct
*/
if (ACPI_STRNCMP ((char *) AcpiGbl_RSDP, RSDP_SIG, sizeof (RSDP_SIG)-1) != 0)
{
/* Nope, BAD Signature */
return_ACPI_STATUS (AE_BAD_SIGNATURE);
}
if (AcpiTbChecksum (AcpiGbl_RSDP, ACPI_RSDP_CHECKSUM_LENGTH) != 0)
{
/* Nope, BAD Checksum */
return_ACPI_STATUS (AE_BAD_CHECKSUM);
}
}
/* Get the RSDT and validate it */
AcpiTbGetRsdtAddress (&Address);
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
"RSDP located at %p, RSDT physical=%8.8X%8.8X \n",
AcpiGbl_RSDP,
ACPI_HIDWORD (Address.Pointer.Value),
ACPI_LODWORD (Address.Pointer.Value)));
/* Insert ProcessorMode flags */
Address.PointerType |= Flags;
Status = AcpiTbGetTable (&Address, &RsdtInfo);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
Status = AcpiTbValidateRsdt (RsdtInfo.Pointer);
if (ACPI_FAILURE (Status))
{
goto Cleanup;
}
/* Get the number of table pointers within the RSDT */
TableCount = AcpiTbGetTableCount (AcpiGbl_RSDP, RsdtInfo.Pointer);
Address.PointerType = AcpiGbl_TableFlags | Flags;
/*
* Search the RSDT/XSDT for the correct instance of the
* requested table
*/
for (i = 0, j = 0; i < TableCount; i++)
{
/* Get the next table pointer, handle RSDT vs. XSDT */
if (AcpiGbl_RSDP->Revision < 2)
{
Address.Pointer.Value = ((RSDT_DESCRIPTOR *) RsdtInfo.Pointer)->TableOffsetEntry[i];
}
else
{
Address.Pointer.Value = ACPI_GET_ADDRESS (
((XSDT_DESCRIPTOR *) RsdtInfo.Pointer)->TableOffsetEntry[i]);
}
/* Get the table header */
Status = AcpiTbGetTableHeader (&Address, &Header);
if (ACPI_FAILURE (Status))
{
goto Cleanup;
}
/* Compare table signatures and table instance */
if (!ACPI_STRNCMP (Header.Signature, Signature, ACPI_NAME_SIZE))
{
/* An instance of the table was found */
j++;
if (j >= Instance)
{
/* Found the correct instance, get the entire table */
Status = AcpiTbGetTableBody (&Address, &Header, &TableInfo);
if (ACPI_FAILURE (Status))
{
goto Cleanup;
}
*TablePointer = TableInfo.Pointer;
goto Cleanup;
}
}
}
/* Did not find the table */
Status = AE_NOT_EXIST;
Cleanup:
AcpiOsUnmapMemory (RsdtInfo.Pointer, (ACPI_SIZE) RsdtInfo.Pointer->Length);
return_ACPI_STATUS (Status);
}
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);
}
}
}