void
AcpiTbInstallTableWithOverride (
ACPI_TABLE_DESC *NewTableDesc,
BOOLEAN Override,
UINT32 *TableIndex)
{
UINT32 i;
ACPI_STATUS Status;
Status = AcpiTbGetNextTableDescriptor (&i, NULL);
if (ACPI_FAILURE (Status))
{
return;
}
/*
* ACPI Table Override:
*
* Before we install the table, let the host OS override it with a new
* one if desired. Any table within the RSDT/XSDT can be replaced,
* including the DSDT which is pointed to by the FADT.
*/
if (Override)
{
AcpiTbOverrideTable (NewTableDesc);
}
AcpiTbInitTableDescriptor (&AcpiGbl_RootTableList.Tables[i],
NewTableDesc->Address, NewTableDesc->Flags, NewTableDesc->Pointer);
AcpiTbPrintTableHeader (NewTableDesc->Address, NewTableDesc->Pointer);
/* This synchronizes AcpiGbl_DsdtIndex */
*TableIndex = i;
/* Set the global integer width (based upon revision of the DSDT) */
if (i == AcpiGbl_DsdtIndex)
{
AcpiUtSetIntegerWidth (NewTableDesc->Pointer->Revision);
}
}
static ACPI_STATUS
AdStoreTable (
ACPI_TABLE_HEADER *Table,
UINT32 *TableIndex)
{
ACPI_STATUS Status;
ACPI_TABLE_DESC *TableDesc;
Status = AcpiTbGetNextTableDescriptor (TableIndex, &TableDesc);
if (ACPI_FAILURE (Status))
{
return (Status);
}
/* Initialize added table */
AcpiTbInitTableDescriptor (TableDesc, ACPI_PTR_TO_PHYSADDR (Table),
ACPI_TABLE_ORIGIN_INTERNAL_VIRTUAL, Table);
Status = AcpiTbValidateTable (TableDesc);
return (Status);
}
ACPI_STATUS
AcpiTbInstallStandardTable (
ACPI_PHYSICAL_ADDRESS Address,
UINT8 Flags,
BOOLEAN Reload,
BOOLEAN Override,
UINT32 *TableIndex)
{
UINT32 i;
ACPI_STATUS Status = AE_OK;
ACPI_TABLE_DESC NewTableDesc;
ACPI_FUNCTION_TRACE (TbInstallStandardTable);
/* Acquire a temporary table descriptor for validation */
Status = AcpiTbAcquireTempTable (&NewTableDesc, Address, Flags);
if (ACPI_FAILURE (Status))
{
ACPI_ERROR ((AE_INFO, "Could not acquire table length at %8.8X%8.8X",
ACPI_FORMAT_UINT64 (Address)));
return_ACPI_STATUS (Status);
}
/*
* Optionally do not load any SSDTs from the RSDT/XSDT. This can
* be useful for debugging ACPI problems on some machines.
*/
if (!Reload &&
AcpiGbl_DisableSsdtTableInstall &&
ACPI_COMPARE_NAME (&NewTableDesc.Signature, ACPI_SIG_SSDT))
{
ACPI_INFO ((AE_INFO, "Ignoring installation of %4.4s at %8.8X%8.8X",
NewTableDesc.Signature.Ascii, ACPI_FORMAT_UINT64 (Address)));
goto ReleaseAndExit;
}
/* Validate and verify a table before installation */
Status = AcpiTbVerifyTempTable (&NewTableDesc, NULL);
if (ACPI_FAILURE (Status))
{
goto ReleaseAndExit;
}
if (Reload)
{
/*
* 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 ((NewTableDesc.Signature.Ascii[0] != 0x00) &&
(!ACPI_COMPARE_NAME (&NewTableDesc.Signature, ACPI_SIG_SSDT)) &&
(ACPI_STRNCMP (NewTableDesc.Signature.Ascii, "OEM", 3)))
{
ACPI_BIOS_ERROR ((AE_INFO,
"Table has invalid signature [%4.4s] (0x%8.8X), "
"must be SSDT or OEMx",
AcpiUtValidAcpiName (NewTableDesc.Signature.Ascii) ?
NewTableDesc.Signature.Ascii : "????",
NewTableDesc.Signature.Integer));
Status = AE_BAD_SIGNATURE;
goto ReleaseAndExit;
}
/* Check if table is already registered */
for (i = 0; i < AcpiGbl_RootTableList.CurrentTableCount; ++i)
{
/*
* Check for a table match on the entire table length,
* not just the header.
*/
if (!AcpiTbCompareTables (&NewTableDesc, i))
{
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.
*/
if (AcpiGbl_RootTableList.Tables[i].Flags & ACPI_TABLE_IS_LOADED)
{
/* Table is still loaded, this is an error */
Status = AE_ALREADY_EXISTS;
goto ReleaseAndExit;
}
else
{
/*
* Table was unloaded, allow it to be reloaded.
* As we are going to return AE_OK to the caller, we should
* take the responsibility of freeing the input descriptor.
* Refill the input descriptor to ensure
* AcpiTbInstallTableWithOverride() can be called again to
* indicate the re-installation.
*/
AcpiTbUninstallTable (&NewTableDesc);
*TableIndex = i;
return_ACPI_STATUS (AE_OK);
}
}
}
/* Add the table to the global root table list */
Status = AcpiTbGetNextTableDescriptor (&i, NULL);
if (ACPI_FAILURE (Status))
{
goto ReleaseAndExit;
}
*TableIndex = i;
AcpiTbInstallTableWithOverride (i, &NewTableDesc, Override);
ReleaseAndExit:
/* Release the temporary table descriptor */
AcpiTbReleaseTempTable (&NewTableDesc);
return_ACPI_STATUS (Status);
}
