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
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
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);
}
