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alder_lake_bios/Oem/L05/FeatureCommon/InsydeL05ModulePkg/SpecificVariableServiceDxe/SpecificVariableServiceDxe.c

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/** @file
;******************************************************************************
;* Copyright (c) 2012 - 2016, Insyde Software Corp. All Rights Reserved.
;*
;* You may not reproduce, distribute, publish, display, perform, modify, adapt,
;* transmit, broadcast, present, recite, release, license or otherwise exploit
;* any part of this publication in any form, by any means, without the prior
;* written permission of Insyde Software Corporation.
;*
;******************************************************************************
*/
#include "SpecificVariableServiceDxe.h"
EFI_SMM_FW_BLOCK_SERVICE_PROTOCOL *mSmmFwb = NULL;
EFI_STATUS
LenovoVariableSyncDataAndBufferWithRom (
IN OUT LENOVO_VARIABLE_PRIVATE_DATA *PrivateData
)
{
LENOVO_VARIABLE_RIGION_HEADER *FlashRegion1Address;
LENOVO_VARIABLE_RIGION_HEADER *FlashRegion2Address;
UINT32 L05VariableRegion1Size;
UINT32 L05VariableRegion2Size;
L05VariableRegion1Size = (UINT32) FdmGetNAtSize (&gL05H2OFlashMapRegionVaribale1Guid, 1);
L05VariableRegion2Size = (UINT32) FdmGetNAtSize (&gL05H2OFlashMapRegionVaribale2Guid, 1);
FlashRegion1Address = (LENOVO_VARIABLE_RIGION_HEADER *) (UINTN) FdmGetNAtAddr (&gL05H2OFlashMapRegionVaribale1Guid, 1);
FlashRegion2Address = (LENOVO_VARIABLE_RIGION_HEADER *) (UINTN) FdmGetNAtAddr (&gL05H2OFlashMapRegionVaribale2Guid, 1);
if (FlashRegion1Address->PriorityFlag == 0 && FlashRegion2Address->PriorityFlag == 0) {
//Nothing in region
PrivateData->Region = LENOVO_VARIABLE_NO_DATA;
SetMem (PrivateData->VariableBuffer, L05VariableRegion1Size, 0);
CopyMem (PrivateData->VariableBuffer, FlashRegion1Address, sizeof (LENOVO_VARIABLE_RIGION_HEADER));
//Generate RandomNumber
{
UINT64 TimeStamp;
TimeStamp = AsmReadTsc ();
while ((UINT8) TimeStamp == 0) {
TimeStamp = AsmReadTsc ();
}
((LENOVO_VARIABLE_RIGION_HEADER *) PrivateData->VariableBuffer)->RandomNumber = (UINT8) TimeStamp;
}
} else if (FlashRegion1Address->PriorityFlag > FlashRegion2Address->PriorityFlag) {
//Use sub region 1
if (CompareMem (PrivateData->VariableBuffer, FlashRegion1Address, sizeof (LENOVO_VARIABLE_RIGION_HEADER)) == 0 && PrivateData->Region == LENOVO_VARIABLE_USING_REGION_1) {
return EFI_SUCCESS;
} else {
//if not the same, read from ROM to sync
PrivateData->Region = LENOVO_VARIABLE_USING_REGION_1;
CopyMem (PrivateData->VariableBuffer, FlashRegion1Address, L05VariableRegion1Size);
//Verify sub region 1 checksum
{
UINTN Index;
UINT8 *BufferPointer;
UINT16 Checksum;
Checksum = 0;
BufferPointer = PrivateData->VariableBuffer + sizeof (LENOVO_VARIABLE_RIGION_HEADER);
for (Index = 0; Index < L05VariableRegion1Size - sizeof (LENOVO_VARIABLE_RIGION_HEADER); Index++) {
Checksum += *(BufferPointer + Index);
}
if (Checksum != FlashRegion1Address->Checksum) {
PrivateData->Region = LENOVO_VARIABLE_USING_REGION_2;
CopyMem (PrivateData->VariableBuffer, FlashRegion2Address, L05VariableRegion2Size);
}
}
}
} else {
//Use sub region 2
if (CompareMem (PrivateData->VariableBuffer, FlashRegion2Address, sizeof (LENOVO_VARIABLE_RIGION_HEADER)) == 0 && PrivateData->Region == LENOVO_VARIABLE_USING_REGION_2) {
return EFI_SUCCESS;
} else {
PrivateData->Region = LENOVO_VARIABLE_USING_REGION_2;
CopyMem (PrivateData->VariableBuffer, FlashRegion2Address, L05VariableRegion2Size);
//Verify sub region 2 checksum
{
UINTN Index;
UINT8 *BufferPointer;
UINT16 Checksum;
Checksum = 0;
BufferPointer = PrivateData->VariableBuffer + sizeof (LENOVO_VARIABLE_RIGION_HEADER);
for (Index = 0; Index < L05VariableRegion2Size - sizeof (LENOVO_VARIABLE_RIGION_HEADER); Index++) {
Checksum += *(BufferPointer + Index);
}
if (Checksum != FlashRegion2Address->Checksum) {
PrivateData->Region = LENOVO_VARIABLE_USING_REGION_1;
CopyMem (PrivateData->VariableBuffer, FlashRegion1Address, L05VariableRegion1Size);
}
}
}
}
//Decode
if (PrivateData->Region != LENOVO_VARIABLE_NO_DATA) {
UINT8 *BufferPointer;
UINTN Index;
BufferPointer = PrivateData->VariableBuffer + sizeof (LENOVO_VARIABLE_RIGION_HEADER);
for (Index = 0; Index < L05VariableRegion1Size - sizeof (LENOVO_VARIABLE_RIGION_HEADER); Index++) {
*(BufferPointer + Index) = *(BufferPointer + Index) ^ ((LENOVO_VARIABLE_RIGION_HEADER *) PrivateData->VariableBuffer)->RandomNumber;
}
}
//Update LastByte field
{
UINT8 *BufferPointer;
UINTN Index;
BufferPointer = PrivateData->VariableBuffer + sizeof (LENOVO_VARIABLE_RIGION_HEADER);
for (Index = 0; Index < ((LENOVO_VARIABLE_RIGION_HEADER *) PrivateData->VariableBuffer)->VariableCount; Index++) {
BufferPointer = BufferPointer + ((LENOVO_VARIABLE_VARIABLE *) BufferPointer)->VariableDataSize;
BufferPointer = BufferPointer + sizeof (LENOVO_VARIABLE_VARIABLE) - 1;
}
BufferPointer--;
PrivateData->LastByte = BufferPointer;
}
return EFI_SUCCESS;
}
EFI_STATUS
LenovoVariableInitRegion (
VOID
)
{
UINT32 WriteFlashAddress;
UINTN WriteFlashSize;
UINT8 *BufferAddress;
EFI_STATUS Status;
UINT32 L05VariableRegion1Size;
UINT32 L05VariableRegion2Size;
L05VariableRegion1Size = (UINT32) FdmGetNAtSize (&gL05H2OFlashMapRegionVaribale1Guid, 1);
L05VariableRegion2Size = (UINT32) FdmGetNAtSize (&gL05H2OFlashMapRegionVaribale2Guid, 1);
WriteFlashAddress = (UINT32) FdmGetNAtAddr (&gL05H2OFlashMapRegionVaribale1Guid, 1);
WriteFlashSize = L05VariableRegion1Size + L05VariableRegion2Size;
BufferAddress = AllocateZeroPool (WriteFlashSize);
SetMem (BufferAddress, WriteFlashSize, 0);
*(CHAR8 *) (BufferAddress) = 'L';
*(CHAR8 *) (BufferAddress + 1) = 'E';
*(CHAR8 *) (BufferAddress + 2) = 'N';
*(CHAR8 *) (BufferAddress + 3) = 'V';
*(CHAR8 *) (BufferAddress + L05VariableRegion1Size) = 'L';
*(CHAR8 *) (BufferAddress + L05VariableRegion1Size + 1) = 'E';
*(CHAR8 *) (BufferAddress + L05VariableRegion1Size + 2) = 'N';
*(CHAR8 *) (BufferAddress + L05VariableRegion1Size + 3) = 'V';
Status = mSmmFwb->EraseBlocks (mSmmFwb, WriteFlashAddress, &WriteFlashSize);
if (!EFI_ERROR (Status)) {
Status = mSmmFwb->Write (
mSmmFwb,
WriteFlashAddress,
&WriteFlashSize,
(UINT8 *) BufferAddress
);
}
FreePool (BufferAddress);
return EFI_SUCCESS;
}
/*
Search VariableGuidName from PrivateData->VariableBuffer
If found, VariableSizeAddress point to the variable address
If not found, VariableSizeAddress = NULL
*/
VOID
LenovoVariableSearchVar (
IN LENOVO_VARIABLE_PRIVATE_DATA *PrivateData,
IN EFI_GUID *VariableGuidName,
OUT UINT8 **VariableAddress
)
{
UINT8 *BufferPointer;
UINTN Index;
BufferPointer = PrivateData->VariableBuffer + sizeof (LENOVO_VARIABLE_RIGION_HEADER);
for (Index = 0; Index < ((LENOVO_VARIABLE_RIGION_HEADER *) PrivateData->VariableBuffer)->VariableCount; Index++) {
if (CompareGuid (VariableGuidName, &(((LENOVO_VARIABLE_VARIABLE *) BufferPointer)->VariableGuidName))) {
*VariableAddress = BufferPointer;
return;
} else {
BufferPointer = BufferPointer + ((LENOVO_VARIABLE_VARIABLE *) BufferPointer)->VariableDataSize;
BufferPointer = BufferPointer + sizeof (LENOVO_VARIABLE_VARIABLE) - 1;
}
}
*VariableAddress = NULL;
return;
}
EFI_STATUS
LenovoVariableWriteBufferToFlash (
IN LENOVO_VARIABLE_PRIVATE_DATA *PrivateData
)
{
EFI_STATUS Status;
UINTN WriteFlashAddress;
UINTN WriteFlashSize;
WriteFlashAddress = 0;
WriteFlashSize = (UINTN) FdmGetNAtSize (&gL05H2OFlashMapRegionVaribale1Guid, 1);
switch (PrivateData->Region) {
case LENOVO_VARIABLE_NO_DATA:
WriteFlashAddress = (UINTN) FdmGetNAtAddr (&gL05H2OFlashMapRegionVaribale1Guid, 1);
break;
case LENOVO_VARIABLE_USING_REGION_1:
WriteFlashAddress = (UINTN) FdmGetNAtAddr (&gL05H2OFlashMapRegionVaribale2Guid, 1);
break;
case LENOVO_VARIABLE_USING_REGION_2:
WriteFlashAddress = (UINTN) FdmGetNAtAddr (&gL05H2OFlashMapRegionVaribale1Guid, 1);
break;
default:
break;
}
((LENOVO_VARIABLE_RIGION_HEADER *) (PrivateData->VariableBuffer))->PriorityFlag++;
//Encode
{
UINT8 *BufferPointer;
UINTN Index;
BufferPointer = PrivateData->VariableBuffer + sizeof (LENOVO_VARIABLE_RIGION_HEADER);
for (Index = 0; Index < WriteFlashSize - sizeof (LENOVO_VARIABLE_RIGION_HEADER); Index++) {
*(BufferPointer + Index) = *(BufferPointer + Index) ^ ((LENOVO_VARIABLE_RIGION_HEADER *) PrivateData->VariableBuffer)->RandomNumber;
}
}
//Update checksum
{
UINT8 *BufferPointer;
UINTN Index;
UINT16 Checksum;
Checksum = 0;
BufferPointer = PrivateData->VariableBuffer + sizeof (LENOVO_VARIABLE_RIGION_HEADER);
for (Index = 0; Index < (UINTN) FdmGetNAtSize (&gL05H2OFlashMapRegionVaribale1Guid, 1) - sizeof (LENOVO_VARIABLE_RIGION_HEADER); Index++) {
Checksum += *(BufferPointer + Index);
}
((LENOVO_VARIABLE_RIGION_HEADER *) PrivateData->VariableBuffer)->Checksum = Checksum;
}
//Write buffer to flash
Status = mSmmFwb->EraseBlocks (mSmmFwb, WriteFlashAddress, &WriteFlashSize);
if (!EFI_ERROR (Status)) {
Status = mSmmFwb->Write (
mSmmFwb,
WriteFlashAddress,
&WriteFlashSize,
PrivateData->VariableBuffer
);
}
//Update region
if (!EFI_ERROR (Status)) {
PrivateData->Region = (PrivateData->Region == LENOVO_VARIABLE_USING_REGION_1) ? LENOVO_VARIABLE_USING_REGION_2 : LENOVO_VARIABLE_USING_REGION_1;
}
//Decode
{
UINT8 *BufferPointer;
UINTN Index;
BufferPointer = PrivateData->VariableBuffer + sizeof (LENOVO_VARIABLE_RIGION_HEADER);
for (Index = 0; Index < WriteFlashSize - sizeof (LENOVO_VARIABLE_RIGION_HEADER); Index++) {
*(BufferPointer + Index) = *(BufferPointer + Index) ^ ((LENOVO_VARIABLE_RIGION_HEADER *) PrivateData->VariableBuffer)->RandomNumber;
}
}
return Status;
}
EFI_STATUS
LenovoDeleteVariable (
IN EFI_L05_VARIABLE_PROTOCOL *This,
IN EFI_GUID *VariableGuidName
)
{
EFI_STATUS Status;
LENOVO_VARIABLE_PRIVATE_DATA *PrivateData;
UINT8 *VariableAddress;
UINT8 *ShiftBegin;
UINTN ShiftCount;
UINTN Index;
PrivateData = INSTANCE_FROM_LENV_THIS (This);
if (VariableGuidName == NULL) {
return EFI_INVALID_PARAMETER;
}
LenovoVariableSyncDataAndBufferWithRom (PrivateData);
if (((LENOVO_VARIABLE_RIGION_HEADER *) PrivateData->VariableBuffer)->LockFlag == LENOVO_VARIABLE_REGION_LOCKED) {
return EFI_ACCESS_DENIED;
}
LenovoVariableSearchVar (PrivateData, VariableGuidName, &VariableAddress);
if (VariableAddress == NULL) {
return EFI_NOT_FOUND;
}
if ((((LENOVO_VARIABLE_VARIABLE *) VariableAddress)->VariableAttribute & LENOVO_VARIABLE_ATTRIBUTE_LOCKED) == LENOVO_VARIABLE_ATTRIBUTE_LOCKED) {
return EFI_WRITE_PROTECTED;
}
ShiftBegin = VariableAddress + ((LENOVO_VARIABLE_VARIABLE *) VariableAddress)->VariableDataSize;
ShiftBegin = ShiftBegin + sizeof (LENOVO_VARIABLE_VARIABLE) - 1;
ShiftCount = 0 + ((LENOVO_VARIABLE_VARIABLE *) VariableAddress)->VariableDataSize;
ShiftCount = ShiftCount + sizeof (LENOVO_VARIABLE_VARIABLE) - 1;
//Begin shift
while (ShiftBegin <= PrivateData->LastByte) {
*(ShiftBegin - ShiftCount) = *ShiftBegin;
ShiftBegin++;
}
for (Index = 0; Index < ShiftCount; Index++) {
*(ShiftBegin - ShiftCount + Index) = 0;
}
((LENOVO_VARIABLE_RIGION_HEADER *) PrivateData->VariableBuffer)->VariableCount--;
PrivateData->LastByte -= ShiftCount;
Status = LenovoVariableWriteBufferToFlash (PrivateData);
return Status;
}
/*++
Routine Description:
Using runtime service GetVariable(DXE) or SMM variable protocol(SMM) to get variable.
Variable name always be the same, we only use GUID to distingue variable.
Simply return get variable function.
--*/
EFI_STATUS
L05GetVariable (
IN EFI_L05_VARIABLE_PROTOCOL *This,
IN EFI_GUID *VariableGuidName,
IN OUT UINT32 *DataSize,
OUT VOID *Data
)
{
LENOVO_VARIABLE_PRIVATE_DATA *PrivateData;
UINT32 VariableSize;
UINT8 *VariableAddress;
PrivateData = INSTANCE_FROM_LENV_THIS (This);
if (VariableGuidName == NULL || DataSize == NULL) {
return EFI_INVALID_PARAMETER;
}
LenovoVariableSyncDataAndBufferWithRom (PrivateData);
if (PrivateData->Region == LENOVO_VARIABLE_NO_DATA || ((LENOVO_VARIABLE_RIGION_HEADER *) PrivateData->VariableBuffer)->VariableCount == 0) {
return EFI_NOT_FOUND;
}
LenovoVariableSearchVar (PrivateData, VariableGuidName, &VariableAddress);
if (VariableAddress != NULL) {
VariableSize = ((LENOVO_VARIABLE_VARIABLE *) VariableAddress)->VariableDataSize;
if (*DataSize < VariableSize) {
*DataSize = VariableSize;
return EFI_BUFFER_TOO_SMALL;
}
if (Data == NULL) {
return EFI_INVALID_PARAMETER;
}
*DataSize = VariableSize;
CopyMem (Data, ((LENOVO_VARIABLE_VARIABLE *) VariableAddress)->VariableData, VariableSize);
return EFI_SUCCESS;
}
return EFI_NOT_FOUND;
}
/*++
Routine Description:
Using runtime service SetVariable(DXE) or SMM variable protocol(SMM) to set variable.
Variable name always be the same, we only use GUID to distingue variable.
Simply return set variable function.
--*/
EFI_STATUS
L05SetVariable (
IN EFI_L05_VARIABLE_PROTOCOL *This,
IN EFI_GUID *VariableGuidName,
IN UINT32 DataSize,
IN VOID *Data
)
{
EFI_STATUS Status;
LENOVO_VARIABLE_PRIVATE_DATA *PrivateData;
LENOVO_VARIABLE_RIGION_HEADER *FlashRegion1Address;
LENOVO_VARIABLE_RIGION_HEADER *FlashRegion2Address;
UINTN L05VariableRegion1Size;
UINTN L05VariableRegion2Size;
L05VariableRegion1Size = (UINTN) FdmGetNAtSize (&gL05H2OFlashMapRegionVaribale1Guid, 1);
L05VariableRegion2Size = (UINTN) FdmGetNAtSize (&gL05H2OFlashMapRegionVaribale2Guid, 1);
FlashRegion1Address = (LENOVO_VARIABLE_RIGION_HEADER *) (UINTN) FdmGetNAtAddr (&gL05H2OFlashMapRegionVaribale1Guid, 1);
FlashRegion2Address = (LENOVO_VARIABLE_RIGION_HEADER *) (UINTN) FdmGetNAtAddr (&gL05H2OFlashMapRegionVaribale2Guid, 1);
PrivateData = INSTANCE_FROM_LENV_THIS (This);
if (VariableGuidName == NULL) {
return EFI_INVALID_PARAMETER;
}
LenovoVariableSyncDataAndBufferWithRom (PrivateData);
if (((LENOVO_VARIABLE_RIGION_HEADER *) PrivateData->VariableBuffer)->LockFlag == LENOVO_VARIABLE_REGION_LOCKED) {
return EFI_ACCESS_DENIED;
}
//If DataSize = 0, then delete variable, sync with EFI variable
if (DataSize == 0) {
return LenovoDeleteVariable (This, VariableGuidName);
}
if (Data == NULL) {
return EFI_INVALID_PARAMETER;
}
//If variable exist, need delete it first
Status = LenovoDeleteVariable (This, VariableGuidName);
if (Status != EFI_NOT_FOUND && Status != EFI_SUCCESS) {
return Status;
}
//Make sure we have enough space
if (PrivateData->Region == LENOVO_VARIABLE_USING_REGION_2) {
//Is using region2
if ((UINTN) (PrivateData->LastByte) + sizeof (LENOVO_VARIABLE_VARIABLE) - 1 + DataSize > \
(UINTN) FlashRegion2Address + L05VariableRegion2Size - 1) {
return EFI_OUT_OF_RESOURCES;
}
} else {
if ((UINTN) (PrivateData->LastByte) + sizeof (LENOVO_VARIABLE_VARIABLE) - 1 + DataSize > \
(UINTN) FlashRegion1Address + L05VariableRegion1Size - 1) {
return EFI_OUT_OF_RESOURCES;
}
}
//Add a variable
{
LENOVO_VARIABLE_VARIABLE Variable;
CopyMem (&(Variable.VariableGuidName), VariableGuidName, sizeof (*VariableGuidName));
Variable.VariableDataSize = DataSize;
Variable.VariableAttribute = 0;
CopyMem ((PrivateData->LastByte) + 1, &Variable, sizeof (Variable) - 1);
CopyMem ((PrivateData->LastByte) + 1 + sizeof (Variable) - 1, Data, DataSize);
PrivateData->LastByte = PrivateData->LastByte + sizeof (Variable) - 1 + DataSize;
}
((LENOVO_VARIABLE_RIGION_HEADER *) PrivateData->VariableBuffer)->VariableCount++;
Status = LenovoVariableWriteBufferToFlash (PrivateData);
return Status;
}
/*++
Routine Description:
Not implemented.
--*/
EFI_STATUS
L05LockVariable (
IN EFI_L05_VARIABLE_PROTOCOL *This,
IN EFI_GUID *VariableGuidName
)
{
LENOVO_VARIABLE_PRIVATE_DATA *PrivateData;
UINT8 *VariableAddress;
PrivateData = INSTANCE_FROM_LENV_THIS (This);
LenovoVariableSyncDataAndBufferWithRom (PrivateData);
if (((LENOVO_VARIABLE_RIGION_HEADER *) PrivateData->VariableBuffer)->LockFlag == LENOVO_VARIABLE_REGION_LOCKED) {
return EFI_ACCESS_DENIED;
}
if (PrivateData->Region == LENOVO_VARIABLE_NO_DATA || ((LENOVO_VARIABLE_RIGION_HEADER *) PrivateData->VariableBuffer)->VariableCount == 0) {
return EFI_NOT_FOUND;
}
LenovoVariableSearchVar (PrivateData, VariableGuidName, &VariableAddress);
if (VariableAddress != NULL) {
((LENOVO_VARIABLE_VARIABLE *) VariableAddress)->VariableAttribute |= LENOVO_VARIABLE_ATTRIBUTE_LOCKED;
return LenovoVariableWriteBufferToFlash (PrivateData);
} else {
return EFI_NOT_FOUND;
}
}
/*++
Routine Description:
Not implemented.
--*/
EFI_STATUS
L05UnlockVariable (
IN EFI_L05_VARIABLE_PROTOCOL *This,
IN EFI_GUID *VariableGuidName,
IN CHAR16 *Password
)
{
LENOVO_VARIABLE_PRIVATE_DATA *PrivateData;
UINT8 *VariableAddress;
CHAR16 *LenovoVariablePassword = LENOVO_VARIABLE_UNLOCK_PASSWORD;
PrivateData = INSTANCE_FROM_LENV_THIS (This);
LenovoVariableSyncDataAndBufferWithRom (PrivateData);
if (((LENOVO_VARIABLE_RIGION_HEADER *) PrivateData->VariableBuffer)->LockFlag == LENOVO_VARIABLE_REGION_LOCKED) {
return EFI_ACCESS_DENIED;
}
if (PrivateData->Region == LENOVO_VARIABLE_NO_DATA || ((LENOVO_VARIABLE_RIGION_HEADER *) PrivateData->VariableBuffer)->VariableCount == 0) {
return EFI_NOT_FOUND;
}
LenovoVariableSearchVar (PrivateData, VariableGuidName, &VariableAddress);
if (VariableAddress != NULL) {
//Verify Password
if (StrCmp (Password, LenovoVariablePassword) != 0) {
return EFI_SECURITY_VIOLATION;
}
((LENOVO_VARIABLE_VARIABLE *) VariableAddress)->VariableAttribute &= ~LENOVO_VARIABLE_ATTRIBUTE_LOCKED;
return LenovoVariableWriteBufferToFlash (PrivateData);
} else {
return EFI_NOT_FOUND;
}
}
EFI_STATUS
L05VariableServiceDxeEntry (
IN EFI_HANDLE ImageHandle,
IN EFI_SYSTEM_TABLE *SystemTable
)
{
LENOVO_VARIABLE_PRIVATE_DATA *PrivateData;
EFI_STATUS Status;
UINT8 *BufferAddress;
LENOVO_VARIABLE_RIGION_HEADER *FlashRegion1Address;
LENOVO_VARIABLE_RIGION_HEADER *FlashRegion2Address;
Status = EFI_SUCCESS;
Status = gBS->LocateProtocol (&gEfiSmmFwBlockServiceProtocolGuid, NULL, (VOID **) &mSmmFwb);
if (EFI_ERROR (Status)) {
return Status;
}
FlashRegion1Address = (LENOVO_VARIABLE_RIGION_HEADER *) (UINTN) FdmGetNAtAddr (&gL05H2OFlashMapRegionVaribale1Guid, 1);
FlashRegion2Address = (LENOVO_VARIABLE_RIGION_HEADER *) (UINTN) FdmGetNAtAddr (&gL05H2OFlashMapRegionVaribale2Guid, 1);
PrivateData = AllocateZeroPool (sizeof (LENOVO_VARIABLE_PRIVATE_DATA));
if (PrivateData == NULL) {
return EFI_OUT_OF_RESOURCES;
}
BufferAddress = AllocateZeroPool ((UINTN) FdmGetNAtSize (&gL05H2OFlashMapRegionVaribale1Guid, 1));
PrivateData->Signature = LENV_SIGNATURE;
PrivateData->VariableBuffer = BufferAddress;
if (AsciiStrnCmp (FlashRegion1Address->Signature, "LENV", 4) || AsciiStrnCmp (FlashRegion2Address->Signature, "LENV", 4)) {
//In case lvar region is unknow data, init it to 'lenv' + all 00
if (EFI_ERROR (LenovoVariableInitRegion ())) {
return EFI_UNSUPPORTED;
}
}
LenovoVariableSyncDataAndBufferWithRom (PrivateData);
PrivateData->LenovoVariableInstance.GetVariable = L05GetVariable;
PrivateData->LenovoVariableInstance.SetVariable = L05SetVariable;
PrivateData->LenovoVariableInstance.LockVariable = L05LockVariable;
PrivateData->LenovoVariableInstance.UnlockVariable = L05UnlockVariable;
Status = gBS->InstallProtocolInterface (
&ImageHandle,
&gEfiL05VariableProtocolGuid,
EFI_NATIVE_INTERFACE,
&(PrivateData->LenovoVariableInstance)
);
if (EFI_ERROR (Status)) {
return Status;
}
return Status;
}
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