MdeModulePkg/Include/WorkingBlockHeader.h

   1 /** @file
   2
   3   The header structure of FTW working block region.
   4
   5 Copyright (c) 2006 - 2008, Intel Corporation
   6 All rights reserved. This program and the accompanying materials
   7 are licensed and made available under the terms and conditions of the BSD License
   8 which accompanies this distribution.  The full text of the license may be found at
   9 http://opensource.org/licenses/bsd-license.php
  10
  11 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  12 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  13
  14 **/
  15
  16 #ifndef __EFI_WORKING_BLOCK_HEADER_H__
  17 #define __EFI_WORKING_BLOCK_HEADER_H__
  18
  19 //
  20 // EFI Fault tolerant working block header
  21 // The header is immediately followed by the write queue.
  22 //
  23 typedef struct {
  24   EFI_GUID  Signature;
  25   UINT32    Crc;
  26   UINT8     WorkingBlockValid : 1;
  27   UINT8     WorkingBlockInvalid : 1;
  28 #define WORKING_BLOCK_VALID   0x1
  29 #define WORKING_BLOCK_INVALID 0x2
  30   UINT8     Reserved : 6;
  31   UINT8     Reserved3[3];
  32   UINT64    WriteQueueSize;
  33   //
  34   // UINT8                WriteQueue[WriteQueueSize];
  35   //
  36 } EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER;
  37
  38 #endif