1 files changed, 54 insertions, 0 deletions
diff --git a/MdeModulePkg/Include/Guid/FaultTolerantWrite.h b/MdeModulePkg/Include/Guid/FaultTolerantWrite.h
new file mode 100644
index 000000000..cb7b454b2
--- /dev/null
+++ b/MdeModulePkg/Include/Guid/FaultTolerantWrite.h
@@ -0,0 +1,54 @@
+/** @file
+ Define the GUID gEdkiiFaultTolerantWriteGuid that will be used to build
+ FAULT_TOLERANT_WRITE_LAST_WRITE_DATA GUID hob and install PPI to inform the check
+ for FTW last write data has been done. The GUID hob will be only built if FTW last write was
+ still in progress with SpareComplete set and DestinationComplete not set.
+
+Copyright (c) 2013, Intel Corporation. All rights reserved.<BR>
+This program and the accompanying materials are licensed and made available under 
+the terms and conditions of the BSD License that 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 _FAULT_TOLERANT_WRITE_H_
+#define _FAULT_TOLERANT_WRITE_H_
+
+#define EDKII_FAULT_TOLERANT_WRITE_GUID \
+  { \
+    0x1d3e9cb8, 0x43af, 0x490b, { 0x83,  0xa, 0x35, 0x16, 0xaa, 0x53, 0x20, 0x47 } \
+  }
+
+//
+// FTW Last write data. It will be used as gEdkiiFaultTolerantWriteGuid GUID hob data.
+//
+typedef struct {
+  ///
+  /// Target address to be updated in FTW last write.
+  ///
+  EFI_PHYSICAL_ADDRESS      TargetAddress;
+  ///
+  /// Spare address to back up the updated buffer.
+  ///
+  EFI_PHYSICAL_ADDRESS      SpareAddress;
+  ///
+  /// The length of data that have been backed up in spare block.
+  /// It is also the length of target block that has been erased.
+  ///
+  UINT64                    Length;
+} FAULT_TOLERANT_WRITE_LAST_WRITE_DATA;
+
+//
+// This GUID will be used to install PPI to inform the check for FTW last write data has been done.
+// The related FAULT_TOLERANT_WRITE_LAST_WRITE_DATA GUID hob will be only built if
+// FTW last write was still in progress with SpareComplete set and DestinationComplete not set.
+// It means the target buffer has been backed up in spare block, then target block has been erased,
+// but the target buffer has not been writen in target block from spare block.
+//
+extern EFI_GUID gEdkiiFaultTolerantWriteGuid;
+
+#endif