audk/MdeModulePkg/Include/WorkingBlockHeader.h

/** @file

  Defines data structure that is the headers found at the runtime
  updatable firmware volumes.
  The header structure of FTW working block region.

Copyright (c) 2006 - 2008, Intel Corporation
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution.  The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php

THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

**/

#ifndef __EFI_WORKING_BLOCK_HEADER_H__
#define __EFI_WORKING_BLOCK_HEADER_H__

//
// EFI Fault tolerant working block header
// The header is immediately followed by the write queue.
//
typedef struct {
  EFI_GUID  Signature;
  UINT32    Crc;
  UINT8     WorkingBlockValid : 1;
  UINT8     WorkingBlockInvalid : 1;
#define WORKING_BLOCK_VALID   0x1
#define WORKING_BLOCK_INVALID 0x2
  UINT8     Reserved : 6;
  UINT8     Reserved3[3];
  UINT32    WriteQueueSize;
  //
  // UINT8                WriteQueue[WriteQueueSize];
  //
} EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER;

#endif