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/** @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;
}
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