system76-edk2/EmulatorPkg/FvbServicesRuntimeDxe/FvbInfo.c

/*++ @file
  Defines data structure that is the volume header found.These data is intent
  to decouple FVB driver with FV header.

Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>
Portions copyright (c) 2011, Apple Inc. All rights reserved.
SPDX-License-Identifier: BSD-2-Clause-Patent


**/

#include <PiDxe.h>

#include <Guid/EventGroup.h>
#include <Guid/FirmwareFileSystem2.h>
#include <Guid/SystemNvDataGuid.h>

#include <Protocol/FirmwareVolumeBlock.h>
#include <Protocol/DevicePath.h>

#include <Library/UefiLib.h>
#include <Library/UefiDriverEntryPoint.h>
#include <Library/BaseLib.h>
#include <Library/DxeServicesTableLib.h>
#include <Library/UefiRuntimeLib.h>
#include <Library/DebugLib.h>
#include <Library/HobLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/PcdLib.h>
#include <Library/DevicePathLib.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[] = {
  //
  // Recovery BOIS FVB
  //
  {
    FixedPcdGet32 (PcdEmuFlashFvRecoverySize),
    {
      {
        0,
      },  // ZeroVector[16]
      EFI_FIRMWARE_FILE_SYSTEM2_GUID,
      FixedPcdGet32 (PcdEmuFlashFvRecoverySize),
      EFI_FVH_SIGNATURE,
      EFI_FVB2_READ_ENABLED_CAP |
      EFI_FVB2_READ_STATUS |
      EFI_FVB2_WRITE_ENABLED_CAP |
      EFI_FVB2_WRITE_STATUS |
      EFI_FVB2_ERASE_POLARITY,
      sizeof (EFI_FIRMWARE_VOLUME_HEADER) + sizeof (EFI_FV_BLOCK_MAP_ENTRY),
      0,  // CheckSum
      0,  // ExtHeaderOffset
      {
        0,
      },  // Reserved[1]
      2,  // Revision
      {
        {
          FixedPcdGet32 (PcdEmuFlashFvRecoverySize)/FixedPcdGet32 (PcdEmuFirmwareBlockSize),
          FixedPcdGet32 (PcdEmuFirmwareBlockSize),
        }
      }
    },
    {
      {
        0,
        0
      }
    }
  },
  //
  // Systen NvStorage FVB
  //
  {
    FixedPcdGet32 (PcdFlashNvStorageVariableSize) + \
    FixedPcdGet32 (PcdFlashNvStorageFtwWorkingSize) + \
    FixedPcdGet32 (PcdFlashNvStorageFtwSpareSize) + \
    FixedPcdGet32 (PcdEmuFlashNvStorageEventLogSize),
    {
      {
        0,
      },  // ZeroVector[16]
      EFI_SYSTEM_NV_DATA_FV_GUID,
      FixedPcdGet32 (PcdFlashNvStorageVariableSize) + \
      FixedPcdGet32 (PcdFlashNvStorageFtwWorkingSize) + \
      FixedPcdGet32 (PcdFlashNvStorageFtwSpareSize) + \
      FixedPcdGet32 (PcdEmuFlashNvStorageEventLogSize),
      EFI_FVH_SIGNATURE,
      EFI_FVB2_READ_ENABLED_CAP |
      EFI_FVB2_READ_STATUS |
      EFI_FVB2_WRITE_ENABLED_CAP |
      EFI_FVB2_WRITE_STATUS |
      EFI_FVB2_ERASE_POLARITY,
      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 (PcdEmuFlashNvStorageEventLogSize)) / FixedPcdGet32 (PcdEmuFirmwareBlockSize),
          FixedPcdGet32 (PcdEmuFirmwareBlockSize),
        }
      }
    },
    {
      {
        0,
        0
      }
    }
  }
};

EFI_STATUS
GetFvbInfo (
  IN  UINT64                      FvLength,
  OUT EFI_FIRMWARE_VOLUME_HEADER  **FvbInfo
  )
{
  UINTN  Index;

  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;
}