ACPI_STATUS
AdGetLocalTables (
void)
{
ACPI_STATUS Status;
ACPI_TABLE_HEADER TableHeader;
ACPI_TABLE_HEADER *NewTable;
UINT32 TableIndex;
/* Get the DSDT via table override */
ACPI_MOVE_32_TO_32 (TableHeader.Signature, ACPI_SIG_DSDT);
AcpiOsTableOverride (&TableHeader, &NewTable);
if (!NewTable)
{
fprintf (stderr, "Could not obtain DSDT\n");
return (AE_NO_ACPI_TABLES);
}
AdWriteTable (NewTable, NewTable->Length,
ACPI_SIG_DSDT, NewTable->OemTableId);
/* Store DSDT in the Table Manager */
Status = AdStoreTable (NewTable, &TableIndex);
if (ACPI_FAILURE (Status))
{
fprintf (stderr, "Could not store DSDT\n");
return (AE_NO_ACPI_TABLES);
}
return (AE_OK);
}
ACPI_TABLE_HEADER *
AcpiTbTableOverride (
ACPI_TABLE_HEADER *TableHeader,
ACPI_TABLE_DESC *TableDesc)
{
ACPI_STATUS Status;
ACPI_TABLE_HEADER *NewTable = NULL;
ACPI_PHYSICAL_ADDRESS NewAddress = 0;
UINT32 NewTableLength = 0;
UINT8 NewFlags;
char *OverrideType;
/* (1) Attempt logical override (returns a logical address) */
Status = AcpiOsTableOverride (TableHeader, &NewTable);
if (ACPI_SUCCESS (Status) && NewTable)
{
NewAddress = ACPI_PTR_TO_PHYSADDR (NewTable);
NewTableLength = NewTable->Length;
NewFlags = ACPI_TABLE_ORIGIN_OVERRIDE;
OverrideType = "Logical";
goto FinishOverride;
}
/* (2) Attempt physical override (returns a physical address) */
Status = AcpiOsPhysicalTableOverride (TableHeader,
&NewAddress, &NewTableLength);
if (ACPI_SUCCESS (Status) && NewAddress && NewTableLength)
{
/* Map the entire new table */
NewTable = AcpiOsMapMemory (NewAddress, NewTableLength);
if (!NewTable)
{
ACPI_EXCEPTION ((AE_INFO, AE_NO_MEMORY,
"%4.4s %p Attempted physical table override failed",
TableHeader->Signature,
ACPI_CAST_PTR (void, TableDesc->Address)));
return (NULL);
}
ACPI_STATUS
AdGetLocalTables (
char *Filename,
BOOLEAN GetAllTables)
{
ACPI_STATUS Status;
ACPI_TABLE_HEADER TableHeader;
ACPI_TABLE_HEADER *NewTable;
UINT32 NumTables;
UINT32 PointerSize;
UINT32 TableIndex;
if (GetAllTables)
{
ACPI_MOVE_32_TO_32 (TableHeader.Signature, ACPI_SIG_RSDT);
AcpiOsTableOverride (&TableHeader, &NewTable);
if (!NewTable)
{
fprintf (stderr, "Could not obtain RSDT\n");
return (AE_NO_ACPI_TABLES);
}
else
{
AdWriteTable (NewTable, NewTable->Length,
ACPI_SIG_RSDT, NewTable->OemTableId);
}
if (ACPI_COMPARE_NAME (NewTable->Signature, ACPI_SIG_RSDT))
{
PointerSize = sizeof (UINT32);
}
else
{
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.
*/
NumTables = (NewTable->Length - sizeof (ACPI_TABLE_HEADER)) / PointerSize;
AcpiOsPrintf ("There are %u tables defined in the %4.4s\n\n",
NumTables, NewTable->Signature);
/* Get the FADT */
ACPI_MOVE_32_TO_32 (TableHeader.Signature, ACPI_SIG_FADT);
AcpiOsTableOverride (&TableHeader, &NewTable);
if (NewTable)
{
AdWriteTable (NewTable, NewTable->Length,
ACPI_SIG_FADT, NewTable->OemTableId);
}
AcpiOsPrintf ("\n");
/* Don't bother with FACS, it is usually all zeros */
}
/* Always get the DSDT */
ACPI_MOVE_32_TO_32 (TableHeader.Signature, ACPI_SIG_DSDT);
AcpiOsTableOverride (&TableHeader, &NewTable);
if (NewTable)
{
AdWriteTable (NewTable, NewTable->Length,
ACPI_SIG_DSDT, NewTable->OemTableId);
/* Store DSDT in the Table Manager */
Status = AcpiTbStoreTable (0, NewTable, NewTable->Length,
0, &TableIndex);
if (ACPI_FAILURE (Status))
{
fprintf (stderr, "Could not store DSDT\n");
return (AE_NO_ACPI_TABLES);
}
}
else
{
fprintf (stderr, "Could not obtain DSDT\n");
return (AE_NO_ACPI_TABLES);
}
#if 0
/* TBD: Future implementation */
AcpiOsPrintf ("\n");
/* Get all SSDTs */
ACPI_MOVE_32_TO_32 (TableHeader.Signature, ACPI_SIG_SSDT);
do
{
NewTable = NULL;
Status = AcpiOsTableOverride (&TableHeader, &NewTable);
} while (NewTable);
#endif
return (AE_OK);
}
ACPI_STATUS
AcpiTbAddTable (
ACPI_TABLE_DESC *TableDesc,
UINT32 *TableIndex)
{
UINT32 i;
ACPI_STATUS Status = AE_OK;
ACPI_TABLE_HEADER *OverrideTable = NULL;
ACPI_FUNCTION_TRACE (TbAddTable);
if (!TableDesc->Pointer)
{
Status = AcpiTbVerifyTable (TableDesc);
if (ACPI_FAILURE (Status) || !TableDesc->Pointer)
{
return_ACPI_STATUS (Status);
}
}
/*
* Validate the incoming table signature.
*
* 1) Originally, we checked the table signature for "SSDT" or "PSDT".
* 2) We added support for OEMx tables, signature "OEM".
* 3) Valid tables were encountered with a null signature, so we just
* gave up on validating the signature, (05/2008).
* 4) We encountered non-AML tables such as the MADT, which caused
* interpreter errors and kernel faults. So now, we once again allow
* only "SSDT", "OEMx", and now, also a null signature. (05/2011).
*/
if ((TableDesc->Pointer->Signature[0] != 0x00) &&
(!ACPI_COMPARE_NAME (TableDesc->Pointer->Signature, ACPI_SIG_SSDT)) &&
(ACPI_STRNCMP (TableDesc->Pointer->Signature, "OEM", 3)))
{
ACPI_ERROR ((AE_INFO,
"Table has invalid signature [%4.4s] (0x%8.8X), must be SSDT or OEMx",
AcpiUtValidAcpiName (*(UINT32 *) TableDesc->Pointer->Signature) ?
TableDesc->Pointer->Signature : "????",
*(UINT32 *) TableDesc->Pointer->Signature));
return_ACPI_STATUS (AE_BAD_SIGNATURE);
}
(void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
/* Check if table is already registered */
for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; ++i)
{
if (!AcpiGbl_RootTableList.Tables[i].Pointer)
{
Status = AcpiTbVerifyTable (&AcpiGbl_RootTableList.Tables[i]);
if (ACPI_FAILURE (Status) ||
!AcpiGbl_RootTableList.Tables[i].Pointer)
{
continue;
}
}
/*
* Check for a table match on the entire table length,
* not just the header.
*/
if (TableDesc->Length != AcpiGbl_RootTableList.Tables[i].Length)
{
continue;
}
if (ACPI_MEMCMP (TableDesc->Pointer,
AcpiGbl_RootTableList.Tables[i].Pointer,
AcpiGbl_RootTableList.Tables[i].Length))
{
continue;
}
/*
* Note: the current mechanism does not unregister a table if it is
* dynamically unloaded. The related namespace entries are deleted,
* but the table remains in the root table list.
*
* The assumption here is that the number of different tables that
* will be loaded is actually small, and there is minimal overhead
* in just keeping the table in case it is needed again.
*
* If this assumption changes in the future (perhaps on large
* machines with many table load/unload operations), tables will
* need to be unregistered when they are unloaded, and slots in the
* root table list should be reused when empty.
*/
/*
* Table is already registered.
* We can delete the table that was passed as a parameter.
*/
AcpiTbDeleteTable (TableDesc);
*TableIndex = i;
if (AcpiGbl_RootTableList.Tables[i].Flags & ACPI_TABLE_IS_LOADED)
{
/* Table is still loaded, this is an error */
Status = AE_ALREADY_EXISTS;
goto Release;
}
else
{
/* Table was unloaded, allow it to be reloaded */
TableDesc->Pointer = AcpiGbl_RootTableList.Tables[i].Pointer;
TableDesc->Address = AcpiGbl_RootTableList.Tables[i].Address;
Status = AE_OK;
goto PrintHeader;
}
}
/*
* ACPI Table Override:
* Allow the host to override dynamically loaded tables.
*/
Status = AcpiOsTableOverride (TableDesc->Pointer, &OverrideTable);
if (ACPI_SUCCESS (Status) && OverrideTable)
{
ACPI_INFO ((AE_INFO,
"%4.4s @ 0x%p Table override, replaced with:",
TableDesc->Pointer->Signature,
ACPI_CAST_PTR (void, TableDesc->Address)));
/* We can delete the table that was passed as a parameter */
AcpiTbDeleteTable (TableDesc);
/* Setup descriptor for the new table */
TableDesc->Address = ACPI_PTR_TO_PHYSADDR (OverrideTable);
TableDesc->Pointer = OverrideTable;
TableDesc->Length = OverrideTable->Length;
TableDesc->Flags = ACPI_TABLE_ORIGIN_OVERRIDE;
}
void
AcpiTbOverrideTable (
ACPI_TABLE_DESC *OldTableDesc)
{
ACPI_STATUS Status;
char *OverrideType;
ACPI_TABLE_DESC NewTableDesc;
ACPI_TABLE_HEADER *Table;
ACPI_PHYSICAL_ADDRESS Address;
UINT32 Length;
/* (1) Attempt logical override (returns a logical address) */
Status = AcpiOsTableOverride (OldTableDesc->Pointer, &Table);
if (ACPI_SUCCESS (Status) && Table)
{
AcpiTbAcquireTempTable (&NewTableDesc, ACPI_PTR_TO_PHYSADDR (Table),
ACPI_TABLE_ORIGIN_EXTERNAL_VIRTUAL);
OverrideType = "Logical";
goto FinishOverride;
}
/* (2) Attempt physical override (returns a physical address) */
Status = AcpiOsPhysicalTableOverride (OldTableDesc->Pointer,
&Address, &Length);
if (ACPI_SUCCESS (Status) && Address && Length)
{
AcpiTbAcquireTempTable (&NewTableDesc, Address,
ACPI_TABLE_ORIGIN_INTERNAL_PHYSICAL);
OverrideType = "Physical";
goto FinishOverride;
}
return; /* There was no override */
FinishOverride:
/* Validate and verify a table before overriding */
Status = AcpiTbVerifyTempTable (&NewTableDesc, NULL);
if (ACPI_FAILURE (Status))
{
return;
}
ACPI_INFO ((AE_INFO, "%4.4s 0x%8.8X%8.8X"
" %s table override, new table: 0x%8.8X%8.8X",
OldTableDesc->Signature.Ascii,
ACPI_FORMAT_UINT64 (OldTableDesc->Address),
OverrideType, ACPI_FORMAT_UINT64 (NewTableDesc.Address)));
/* We can now uninstall the original table */
AcpiTbUninstallTable (OldTableDesc);
/*
* Replace the original table descriptor and keep its state as
* "VALIDATED".
*/
AcpiTbInitTableDescriptor (OldTableDesc, NewTableDesc.Address,
NewTableDesc.Flags, NewTableDesc.Pointer);
AcpiTbValidateTempTable (OldTableDesc);
/* Release the temporary table descriptor */
AcpiTbReleaseTempTable (&NewTableDesc);
}
ACPI_STATUS
AcpiTbAddTable (
ACPI_TABLE_DESC *TableDesc,
UINT32 *TableIndex)
{
UINT32 i;
ACPI_STATUS Status = AE_OK;
ACPI_TABLE_HEADER *OverrideTable = NULL;
ACPI_FUNCTION_TRACE (TbAddTable);
if (!TableDesc->Pointer)
{
Status = AcpiTbVerifyTable (TableDesc);
if (ACPI_FAILURE (Status) || !TableDesc->Pointer)
{
return_ACPI_STATUS (Status);
}
}
/*
* Originally, we checked the table signature for "SSDT" or "PSDT" here.
* Next, we added support for OEMx tables, signature "OEM".
* Valid tables were encountered with a null signature, so we've just
* given up on validating the signature, since it seems to be a waste
* of code. The original code was removed (05/2008).
*/
(void) AcpiUtAcquireMutex (ACPI_MTX_TABLES);
/* Check if table is already registered */
for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; ++i)
{
if (!AcpiGbl_RootTableList.Tables[i].Pointer)
{
Status = AcpiTbVerifyTable (&AcpiGbl_RootTableList.Tables[i]);
if (ACPI_FAILURE (Status) ||
!AcpiGbl_RootTableList.Tables[i].Pointer)
{
continue;
}
}
/*
* Check for a table match on the entire table length,
* not just the header.
*/
if (TableDesc->Length != AcpiGbl_RootTableList.Tables[i].Length)
{
continue;
}
if (ACPI_MEMCMP (TableDesc->Pointer,
AcpiGbl_RootTableList.Tables[i].Pointer,
AcpiGbl_RootTableList.Tables[i].Length))
{
continue;
}
/*
* Note: the current mechanism does not unregister a table if it is
* dynamically unloaded. The related namespace entries are deleted,
* but the table remains in the root table list.
*
* The assumption here is that the number of different tables that
* will be loaded is actually small, and there is minimal overhead
* in just keeping the table in case it is needed again.
*
* If this assumption changes in the future (perhaps on large
* machines with many table load/unload operations), tables will
* need to be unregistered when they are unloaded, and slots in the
* root table list should be reused when empty.
*/
/*
* Table is already registered.
* We can delete the table that was passed as a parameter.
*/
AcpiTbDeleteTable (TableDesc);
*TableIndex = i;
if (AcpiGbl_RootTableList.Tables[i].Flags & ACPI_TABLE_IS_LOADED)
{
/* Table is still loaded, this is an error */
Status = AE_ALREADY_EXISTS;
goto Release;
}
else
{
/* Table was unloaded, allow it to be reloaded */
TableDesc->Pointer = AcpiGbl_RootTableList.Tables[i].Pointer;
TableDesc->Address = AcpiGbl_RootTableList.Tables[i].Address;
Status = AE_OK;
goto PrintHeader;
}
}
/*
* ACPI Table Override:
* Allow the host to override dynamically loaded tables.
*/
Status = AcpiOsTableOverride (TableDesc->Pointer, &OverrideTable);
if (ACPI_SUCCESS (Status) && OverrideTable)
{
ACPI_INFO ((AE_INFO,
"%4.4s @ 0x%p Table override, replaced with:",
TableDesc->Pointer->Signature,
ACPI_CAST_PTR (void, TableDesc->Address)));
/* We can delete the table that was passed as a parameter */
AcpiTbDeleteTable (TableDesc);
/* Setup descriptor for the new table */
TableDesc->Address = ACPI_PTR_TO_PHYSADDR (OverrideTable);
TableDesc->Pointer = OverrideTable;
TableDesc->Length = OverrideTable->Length;
TableDesc->Flags = ACPI_TABLE_ORIGIN_OVERRIDE;
}
