1 files changed, 35 insertions, 0 deletions
diff --git a/src/VBox/Devices/EFI/Firmware/BaseTools/Source/C/Include/Common/WorkingBlockHeader.h b/src/VBox/Devices/EFI/Firmware/BaseTools/Source/C/Include/Common/WorkingBlockHeader.h
new file mode 100644
index 00000000..8912949b
--- /dev/null
+++ b/src/VBox/Devices/EFI/Firmware/BaseTools/Source/C/Include/Common/WorkingBlockHeader.h
@@ -0,0 +1,35 @@
+/** @file
+  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.
+
+  Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#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];
+  UINT64    WriteQueueSize;
+  //
+  // UINT8                WriteQueue[WriteQueueSize];
+  //
+} EFI_FAULT_TOLERANT_WORKING_BLOCK_HEADER;
+
+#endif