/** @file | |
* | |
* Copyright (c) 2015, Hisilicon Limited. All rights reserved. | |
* Copyright (c) 2015, Linaro Limited. All rights reserved. | |
* | |
* This program and the accompanying materials | |
* are licensed and made available under the terms and conditions of the BSD License | |
* which accompanies this distribution. The full text of the license may be found at | |
* http://opensource.org/licenses/bsd-license.php | |
* | |
* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
* | |
**/ | |
#include <Uefi.h> | |
#include <Pi/PiDxeCis.h> | |
#include <Library/DebugLib.h> | |
#include <Library/UefiBootServicesTableLib.h> | |
#include <Library/UefiRuntimeServicesTableLib.h> | |
#include <Library/PrintLib.h> | |
#include <Library/DxeServicesTableLib.h> | |
#include <Protocol/AcpiSystemDescriptionTable.h> | |
#include <Protocol/AcpiTable.h> | |
#include <IndustryStandard/Acpi.h> | |
#include <Uefi/UefiSpec.h> | |
#include <Guid/Acpi.h> | |
#include "UnInstallAcpiTable.h" | |
#define EFI_ACPI_MAX_NUM_TABLES 20 | |
EFI_GUID gSataControlGuid = EFI_SATA_CONTROL_GUID; | |
EFI_STATUS | |
UnInstallSsdtTable ( | |
IN EFI_HANDLE ImageHandle, | |
IN EFI_SYSTEM_TABLE *SystemTable) | |
{ | |
EFI_STATUS Status; | |
EFI_ACPI_SDT_PROTOCOL *AcpiTableProtocol; | |
EFI_ACPI_SDT_HEADER *Table; | |
EFI_ACPI_TABLE_VERSION TableVersion; | |
UINTN TableKey; | |
UINTN i; | |
EFI_ACPI_TABLE_PROTOCOL *AcpiTable; | |
UINT8 DataPtr1 = 2; | |
UINTN DataPtr1Size; | |
UINT32 SsdtName; | |
DataPtr1Size = sizeof(DataPtr1); | |
Status = gRT->GetVariable ( | |
SATA_ENABLE_FLAG, | |
&gSataControlGuid, | |
NULL, | |
&DataPtr1Size, | |
&DataPtr1 | |
); | |
if (!EFI_ERROR (Status)) { | |
DEBUG((EFI_D_ERROR,"Get Variable ok\n")); | |
} | |
if (SATAENABLE == DataPtr1) { | |
Status = gBS->InstallProtocolInterface ( | |
&ImageHandle, | |
&gSataEnableFlagProtocolGuid, | |
EFI_NATIVE_INTERFACE, | |
NULL | |
); | |
if (!EFI_ERROR (Status)) { | |
DEBUG((EFI_D_ERROR,"Install SataEnableFlag Protocol ok, %r\n",Status)); | |
} | |
DEBUG((EFI_D_ERROR, "Current SataEnable Flag is Sata, try to uninstall Sas SSDT table\n")); | |
SsdtName = EFI_SAS_SIGNATURE; | |
} | |
else { | |
DEBUG((EFI_D_ERROR, "Current SataEnable Flag is Sas, try to uninstall Sata SSDT table\n")); | |
SsdtName = EFI_SATA_SIGNATURE; | |
} | |
//Locate AcpiTableProtocol | |
Status = gBS->LocateProtocol (&gEfiAcpiTableProtocolGuid, NULL, (VOID**)&AcpiTable); | |
if (EFI_ERROR (Status)) { | |
DEBUG((EFI_D_ERROR,"Unable to locate ACPI table protocol\n")); | |
return EFI_ABORTED; | |
} | |
// | |
// Find the Acpi Sdt protocol | |
Status = gBS->LocateProtocol(&gEfiAcpiSdtProtocolGuid, NULL, (VOID**) &AcpiTableProtocol); | |
if (EFI_ERROR(Status)) { | |
DEBUG((EFI_D_ERROR,"Unable to locate ACPI Sdt protocol\n")); | |
return EFI_ABORTED; | |
} | |
// | |
// Search for SSDT Table and delete the matched SSDT table | |
for (i = 0; i < EFI_ACPI_MAX_NUM_TABLES; i++) { | |
Status = AcpiTableProtocol->GetAcpiTable(i, &Table, &TableVersion, &TableKey); | |
if (EFI_ERROR(Status)) | |
break; | |
if (Table->Signature == EFI_ACPI_3_0_SECONDARY_SYSTEM_DESCRIPTION_TABLE_SIGNATURE) { | |
if(*(UINT64*)Table->OemTableId == SsdtName) { | |
Status = AcpiTable->UninstallAcpiTable (AcpiTable, TableKey); | |
if (!EFI_ERROR (Status)) { | |
DEBUG((EFI_D_ERROR,"Successfully remove the SSDT table\n")); | |
return EFI_SUCCESS; | |
} | |
} | |
} | |
} | |
return EFI_SUCCESS; | |
} | |