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/** @file
*
* Copyright (c) 2018, Andrei Warkentin <andrey.warkentin@gmail.com>
* Copyright (c) 2006-2014, Intel Corporation. All rights reserved.
*
* SPDX-License-Identifier: BSD-2-Clause-Patent
*
**/
#include <Pi/PiFirmwareVolume.h>
#include <Guid/SystemNvDataGuid.h>
#include <Library/BaseLib.h>
#include <Library/PcdLib.h>
typedef struct {
UINT64 FvLength;
EFI_FIRMWARE_VOLUME_HEADER FvbInfo;
EFI_FV_BLOCK_MAP_ENTRY End[1];
} EFI_FVB_MEDIA_INFO;
EFI_FVB_MEDIA_INFO mPlatformFvbMediaInfo[] = {
//
// System NvStorage FVB
//
{
FixedPcdGet32 (PcdFlashNvStorageVariableSize) +
FixedPcdGet32 (PcdFlashNvStorageFtwWorkingSize) +
FixedPcdGet32 (PcdFlashNvStorageFtwSpareSize) +
FixedPcdGet32 (PcdNvStorageEventLogSize),
{
{
0,
}, // ZeroVector[16]
EFI_SYSTEM_NV_DATA_FV_GUID,
FixedPcdGet32 (PcdFlashNvStorageVariableSize) +
FixedPcdGet32 (PcdFlashNvStorageFtwWorkingSize) +
FixedPcdGet32 (PcdFlashNvStorageFtwSpareSize) +
FixedPcdGet32 (PcdNvStorageEventLogSize),
EFI_FVH_SIGNATURE,
EFI_FVB2_MEMORY_MAPPED |
EFI_FVB2_READ_ENABLED_CAP |
EFI_FVB2_READ_STATUS |
EFI_FVB2_WRITE_ENABLED_CAP |
EFI_FVB2_WRITE_STATUS |
EFI_FVB2_ERASE_POLARITY |
EFI_FVB2_ALIGNMENT_16,
sizeof (EFI_FIRMWARE_VOLUME_HEADER) + sizeof (EFI_FV_BLOCK_MAP_ENTRY),
0, // CheckSum
0, // ExtHeaderOffset
{
0,
}, // Reserved[1]
2, // Revision
{
{
(FixedPcdGet32 (PcdFlashNvStorageVariableSize) +
FixedPcdGet32 (PcdFlashNvStorageFtwWorkingSize) +
FixedPcdGet32 (PcdFlashNvStorageFtwSpareSize) +
FixedPcdGet32 (PcdNvStorageEventLogSize)) /
FixedPcdGet32 (PcdFirmwareBlockSize),
FixedPcdGet32 (PcdFirmwareBlockSize),
}
} // BlockMap[1]
},
{
{
0,
0
}
} // End[1]
}
};
EFI_STATUS
GetFvbInfo (
IN UINT64 FvLength,
OUT EFI_FIRMWARE_VOLUME_HEADER **FvbInfo
)
{
STATIC BOOLEAN Checksummed = FALSE;
UINTN Index;
if (!Checksummed) {
for (Index = 0;
Index < sizeof (mPlatformFvbMediaInfo) / sizeof (EFI_FVB_MEDIA_INFO);
Index += 1) {
UINT16 Checksum;
mPlatformFvbMediaInfo[Index].FvbInfo.Checksum = 0;
Checksum = CalculateCheckSum16 (
(UINT16*)&mPlatformFvbMediaInfo[Index].FvbInfo,
mPlatformFvbMediaInfo[Index].FvbInfo.HeaderLength
);
mPlatformFvbMediaInfo[Index].FvbInfo.Checksum = Checksum;
}
Checksummed = TRUE;
}
for (Index = 0;
Index < sizeof (mPlatformFvbMediaInfo) / sizeof (EFI_FVB_MEDIA_INFO);
Index += 1) {
if (mPlatformFvbMediaInfo[Index].FvLength == FvLength) {
*FvbInfo = &mPlatformFvbMediaInfo[Index].FvbInfo;
return EFI_SUCCESS;
}
}
return EFI_NOT_FOUND;
}
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