BaseTools/Source/C/Include/Common/WorkingBlockHeader.h

   1 /** @file
   2   Defines data structure that is the headers found at the runtime
   3   updatable firmware volumes, such as the FileSystemGuid of the
   4   working block, the header structure of the variable block, FTW
   5   working block, or event log block.
   6
   7   Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>
   8
   9   SPDX-License-Identifier: BSD-2-Clause-Patent
  10
  11 **/
  12
  13 #ifndef __EFI_WORKING_BLOCK_HEADER_H__
  14 #define __EFI_WORKING_BLOCK_HEADER_H__
  15
  16 //
  17 // EFI Fault tolerant working block header
  18 // The header is immediately followed by the write queue.
  19 //
  20 typedef struct {
  21   EFI_GUID  Signature;
  22   UINT32    Crc;
  23   UINT8     WorkingBlockValid : 1;
  24   UINT8     WorkingBlockInvalid : 1;
  25 #define WORKING_BLOCK_VALID   0x1
  26 #define WORKING_BLOCK_INVALID 0x2
  27   UINT8     Reserved : 6;
  28   UINT8     Reserved3[3];
  29   UINT64    WriteQueueSize;
  30   //
  31   // UINT8                WriteQueue[WriteQueueSize];
  32   //
  33 } EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER;
  34
  35 #endif