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/** @file
Copyright (c) 2014 - 2021, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <PiDxe.h>
#include <Protocol/FirmwareVolumeBlock.h>
#include <Library/PcdLib.h>
#include <Library/DebugLib.h>
#include <Library/BaseLib.h>
#include <Guid/FirmwareFileSystem2.h>
#include <Guid/SystemNvDataGuid.h>
#include <Guid/NvVariableInfoGuid.h>
#include <Library/HobLib.h>
#define FVB_MEDIA_BLOCK_SIZE 0x1000
typedef struct {
EFI_FIRMWARE_VOLUME_HEADER FvInfo;
EFI_FV_BLOCK_MAP_ENTRY End[1];
} EFI_FVB2_MEDIA_INFO;
//
// This data structure contains a template of FV header which is used to restore
// Fv header if it's corrupted.
//
EFI_FVB2_MEDIA_INFO mFvbMediaInfo = {
{
{ 0, }, // ZeroVector[16]
EFI_SYSTEM_NV_DATA_FV_GUID,
0,
EFI_FVH_SIGNATURE,
0x0004feff, // check PiFirmwareVolume.h for details on EFI_FVB_ATTRIBUTES_2
sizeof (EFI_FIRMWARE_VOLUME_HEADER) + sizeof (EFI_FV_BLOCK_MAP_ENTRY),
0, // CheckSum which will be calucated dynamically.
0, // ExtHeaderOffset
{ 0, },
EFI_FVH_REVISION,
{
{
0,
FVB_MEDIA_BLOCK_SIZE,
}
}
},
{
{
0,
0
}
}
};
/**
Initialize the variable store
@retval EFI_SUCCESS if initialize the store success.
**/
EFI_STATUS
InitVariableStore (
VOID
)
{
EFI_STATUS Status;
UINT32 NvStorageBase;
UINT32 NvStorageSize;
UINT32 NvVariableSize;
UINT32 FtwWorkingSize;
UINT32 FtwSpareSize;
EFI_HOB_GUID_TYPE *GuidHob;
NV_VARIABLE_INFO *NvVariableInfo;
//
// Find SPI flash variable hob
//
GuidHob = GetFirstGuidHob (&gNvVariableInfoGuid);
if (GuidHob == NULL) {
ASSERT (FALSE);
return EFI_NOT_FOUND;
}
NvVariableInfo = (NV_VARIABLE_INFO *)GET_GUID_HOB_DATA (GuidHob);
//
// Get variable region base and size.
//
NvStorageSize = NvVariableInfo->VariableStoreSize;
NvStorageBase = NvVariableInfo->VariableStoreBase;
//
// NvStorageBase needs to be 4KB aligned, NvStorageSize needs to be 8KB * n
//
if (((NvStorageBase & (SIZE_4KB - 1)) != 0) || ((NvStorageSize & (SIZE_8KB - 1)) != 0)) {
return EFI_INVALID_PARAMETER;
}
FtwSpareSize = NvStorageSize / 2;
FtwWorkingSize = 0x2000;
NvVariableSize = NvStorageSize / 2 - FtwWorkingSize;
DEBUG ((DEBUG_INFO, "NvStorageBase:0x%x, NvStorageSize:0x%x\n", NvStorageBase, NvStorageSize));
if (NvVariableSize >= 0x80000000) {
return EFI_INVALID_PARAMETER;
}
Status = PcdSet32S (PcdFlashNvStorageVariableSize, NvVariableSize);
ASSERT_EFI_ERROR (Status);
Status = PcdSet32S (PcdFlashNvStorageVariableBase, NvStorageBase);
ASSERT_EFI_ERROR (Status);
Status = PcdSet64S (PcdFlashNvStorageVariableBase64, NvStorageBase);
ASSERT_EFI_ERROR (Status);
Status = PcdSet32S (PcdFlashNvStorageFtwWorkingSize, FtwWorkingSize);
ASSERT_EFI_ERROR (Status);
Status = PcdSet32S (PcdFlashNvStorageFtwWorkingBase, NvStorageBase + NvVariableSize);
ASSERT_EFI_ERROR (Status);
Status = PcdSet32S (PcdFlashNvStorageFtwSpareSize, FtwSpareSize);
ASSERT_EFI_ERROR (Status);
Status = PcdSet32S (PcdFlashNvStorageFtwSpareBase, NvStorageBase + FtwSpareSize);
ASSERT_EFI_ERROR (Status);
return EFI_SUCCESS;
}
/**
Get a heathy FV header used for variable store recovery
@retval The FV header.
**/
EFI_FIRMWARE_VOLUME_HEADER *
GetFvHeaderTemplate (
VOID
)
{
EFI_FIRMWARE_VOLUME_HEADER *FvHeader;
UINTN FvSize;
FvSize = PcdGet32 (PcdFlashNvStorageFtwSpareSize) * 2;
FvHeader = &mFvbMediaInfo.FvInfo;
FvHeader->FvLength = FvSize;
FvHeader->BlockMap[0].NumBlocks = (UINT32)(FvSize / FvHeader->BlockMap[0].Length);
FvHeader->Checksum = 0;
FvHeader->Checksum = CalculateCheckSum16 ((UINT16 *)FvHeader, FvHeader->HeaderLength);
return FvHeader;
}
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