--- /dev/null
+/** @file\r
+ Defines data structure that is the headers found at the runtime\r
+ updatable firmware volumes, such as the FileSystemGuid of the\r
+ working block, the header structure of the variable block, FTW\r
+ working block, or event log block.\r
+\r
+ Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.\r
+\r
+ This program and the accompanying materials are licensed and made available\r
+ under the terms and conditions of the BSD License which accompanies this\r
+ distribution. The full text of the license may be found at:\r
+ http://opensource.org/licenses/bsd-license.php\r
+\r
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+\r
+ File Name: WorkingBlockHeader.h\r
+\r
+**/\r
+\r
+#ifndef __EFI_WORKING_BLOCK_HEADER_H__\r
+#define __EFI_WORKING_BLOCK_HEADER_H__\r
+\r
+//\r
+// EFI Fault tolerant working block header\r
+// The header is immediately followed by the write queue.\r
+//\r
+typedef struct {\r
+ EFI_GUID Signature;\r
+ UINT32 Crc;\r
+ UINT8 WorkingBlockValid : 1;\r
+ UINT8 WorkingBlockInvalid : 1;\r
+#define WORKING_BLOCK_VALID 0x1\r
+#define WORKING_BLOCK_INVALID 0x2\r
+ UINT8 Reserved : 6;\r
+ UINT8 Reserved3[3];\r
+ UINT32 WriteQueueSize;\r
+ //\r
+ // UINT8 WriteQueue[WriteQueueSize];\r
+ //\r
+} EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER;\r
+\r
+#endif\r