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/**@file
Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
Module Name:
FvbInfo.c
Abstract:
Defines data structure that is the volume header found.These data is intent
to decouple FVB driver with FV header.
**/
//
// The package level header files this module uses
//
#include <Pi/PiFirmwareVolume.h>
//
// The protocols, PPI and GUID definitions for this module
//
#include <Guid/SystemNvDataGuid.h>
//
// The Library classes this module consumes
//
#include <Library/BaseLib.h>
#include <Library/PcdLib.h>
typedef struct {
UINT64 FvLength;
EFI_FIRMWARE_VOLUME_HEADER FvbInfo;
//
// EFI_FV_BLOCK_MAP_ENTRY ExtraBlockMap[n];//n=0
//
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 (PcdOvmfFlashNvStorageEventLogSize),
{
{
0,
}, // ZeroVector[16]
EFI_SYSTEM_NV_DATA_FV_GUID,
FixedPcdGet32 (PcdFlashNvStorageVariableSize) +
FixedPcdGet32 (PcdFlashNvStorageFtwWorkingSize) +
FixedPcdGet32 (PcdFlashNvStorageFtwSpareSize) +
FixedPcdGet32 (PcdOvmfFlashNvStorageEventLogSize),
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 (PcdOvmfFlashNvStorageEventLogSize)) /
FixedPcdGet32 (PcdOvmfFirmwareBlockSize),
FixedPcdGet32 (PcdOvmfFirmwareBlockSize),
}
} // 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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