EdkModulePkg/Include/Common/WorkingBlockHeader.h

   1 /*++
   2
   3 Copyright (c) 2006, Intel Corporation
   4 All rights reserved. This program and the accompanying materials
   5 are licensed and made available under the terms and conditions of the BSD License
   6 which accompanies this distribution.  The full text of the license may be found at
   7 http://opensource.org/licenses/bsd-license.php
   8
   9 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11
  12 Module Name:
  13
  14   EfiWorkingBlockHeader.h
  15
  16 Abstract:
  17
  18   Defines data structure that is the headers found at the runtime
  19   updatable firmware volumes, such as the FileSystemGuid of the
  20   working block, the header structure of the variable block, FTW
  21   working block, or event log block.
  22
  23 --*/
  24
  25 #ifndef _EFI_WORKING_BLOCK_HEADER_H_
  26 #define _EFI_WORKING_BLOCK_HEADER_H_
  27
  28 //
  29 // EFI Fault tolerant working block header
  30 // The header is immediately followed by the write queue.
  31 //
  32 typedef struct {
  33   EFI_GUID  Signature;
  34   UINT32    Crc;
  35   UINT8     WorkingBlockValid : 1;
  36   UINT8     WorkingBlockInvalid : 1;
  37 #define WORKING_BLOCK_VALID   0x1
  38 #define WORKING_BLOCK_INVALID 0x2
  39   UINT8     Reserved : 6;
  40   UINT8     Reserved3[3];
  41   UINT32    WriteQueueSize;
  42   //
  43   // UINT8                WriteQueue[WriteQueueSize];
  44   //
  45 } EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER;
  46
  47 #endif