133 lines
3.5 KiB
C
133 lines
3.5 KiB
C
/**@file
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Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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Module Name:
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FvbInfo.c
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Abstract:
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Defines data structure that is the volume header found.These data is intent
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to decouple FVB driver with FV header.
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**/
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//
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// The package level header files this module uses
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//
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#include <Pi/PiFirmwareVolume.h>
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//
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// The protocols, PPI and GUID definitions for this module
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//
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#include <Guid/SystemNvDataGuid.h>
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//
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// The Library classes this module consumes
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//
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#include <Library/BaseLib.h>
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#include <Library/PcdLib.h>
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typedef struct {
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UINT64 FvLength;
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EFI_FIRMWARE_VOLUME_HEADER FvbInfo;
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//
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// EFI_FV_BLOCK_MAP_ENTRY ExtraBlockMap[n];//n=0
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//
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EFI_FV_BLOCK_MAP_ENTRY End[1];
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} EFI_FVB_MEDIA_INFO;
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EFI_FVB_MEDIA_INFO mPlatformFvbMediaInfo[] = {
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//
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// System NvStorage FVB
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//
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{
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FixedPcdGet32 (PcdFlashNvStorageVariableSize) +
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FixedPcdGet32 (PcdFlashNvStorageFtwWorkingSize) +
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FixedPcdGet32 (PcdFlashNvStorageFtwSpareSize) +
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FixedPcdGet32 (PcdOvmfFlashNvStorageEventLogSize),
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{
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{
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0,
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}, // ZeroVector[16]
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EFI_SYSTEM_NV_DATA_FV_GUID,
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FixedPcdGet32 (PcdFlashNvStorageVariableSize) +
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FixedPcdGet32 (PcdFlashNvStorageFtwWorkingSize) +
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FixedPcdGet32 (PcdFlashNvStorageFtwSpareSize) +
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FixedPcdGet32 (PcdOvmfFlashNvStorageEventLogSize),
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EFI_FVH_SIGNATURE,
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EFI_FVB2_MEMORY_MAPPED |
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EFI_FVB2_READ_ENABLED_CAP |
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EFI_FVB2_READ_STATUS |
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EFI_FVB2_WRITE_ENABLED_CAP |
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EFI_FVB2_WRITE_STATUS |
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EFI_FVB2_ERASE_POLARITY |
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EFI_FVB2_ALIGNMENT_16,
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sizeof (EFI_FIRMWARE_VOLUME_HEADER) + sizeof (EFI_FV_BLOCK_MAP_ENTRY),
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0, // CheckSum
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0, // ExtHeaderOffset
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{
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0,
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}, // Reserved[1]
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2, // Revision
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{
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{
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(FixedPcdGet32 (PcdFlashNvStorageVariableSize) +
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FixedPcdGet32 (PcdFlashNvStorageFtwWorkingSize) +
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FixedPcdGet32 (PcdFlashNvStorageFtwSpareSize) +
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FixedPcdGet32 (PcdOvmfFlashNvStorageEventLogSize)) /
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FixedPcdGet32 (PcdOvmfFirmwareBlockSize),
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FixedPcdGet32 (PcdOvmfFirmwareBlockSize),
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}
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} // BlockMap[1]
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},
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{
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{
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0,
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0
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}
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} // End[1]
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}
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};
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EFI_STATUS
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GetFvbInfo (
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IN UINT64 FvLength,
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OUT EFI_FIRMWARE_VOLUME_HEADER **FvbInfo
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)
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{
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STATIC BOOLEAN Checksummed = FALSE;
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UINTN Index;
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if (!Checksummed) {
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for (Index = 0;
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Index < sizeof (mPlatformFvbMediaInfo) / sizeof (EFI_FVB_MEDIA_INFO);
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Index += 1)
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{
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UINT16 Checksum;
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mPlatformFvbMediaInfo[Index].FvbInfo.Checksum = 0;
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Checksum = CalculateCheckSum16 (
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(UINT16 *)&mPlatformFvbMediaInfo[Index].FvbInfo,
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mPlatformFvbMediaInfo[Index].FvbInfo.HeaderLength
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);
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mPlatformFvbMediaInfo[Index].FvbInfo.Checksum = Checksum;
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}
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Checksummed = TRUE;
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}
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for (Index = 0;
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Index < sizeof (mPlatformFvbMediaInfo) / sizeof (EFI_FVB_MEDIA_INFO);
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Index += 1)
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{
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if (mPlatformFvbMediaInfo[Index].FvLength == FvLength) {
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*FvbInfo = &mPlatformFvbMediaInfo[Index].FvbInfo;
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return EFI_SUCCESS;
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}
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}
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return EFI_NOT_FOUND;
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}
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