1 files changed, 47 insertions, 0 deletions
diff --git a/EdkModulePkg/Include/Common/WorkingBlockHeader.h b/EdkModulePkg/Include/Common/WorkingBlockHeader.h
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+++ b/EdkModulePkg/Include/Common/WorkingBlockHeader.h
@@ -0,0 +1,47 @@
+/*++
+
+Copyright (c) 2006, 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.             
+
+Module Name:
+
+  EfiWorkingBlockHeader.h
+
+Abstract:
+
+  Defines data structure that is the headers found at the runtime 
+  updatable firmware volumes, such as the FileSystemGuid of the 
+  working block, the header structure of the variable block, FTW
+  working block, or event log block.
+
+--*/
+
+#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;
+  UINT32    WorkingBlockValid : 1;
+  UINT32    WorkingBlockInvalid : 1;
+#define WORKING_BLOCK_VALID   0x1
+#define WORKING_BLOCK_INVALID 0x2
+  UINT32    Reserved : 6;
+  UINT8     Reserved3[3];
+  UINTN     WriteQueueSize;
+  //
+  // UINT8                WriteQueue[WriteQueueSize];
+  //
+} EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER;
+
+#endif