Add SMM Variable implementation.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11151 6f19259b-4bc3-4df7-8a09-765794883524

MdeModulePkg/Include/Protocol/SmmFaultTolerantWrite.h

@@ -0,0 +1,38 @@
+/** @file
+  SMM Fault Tolerant Write protocol is related to EDK II-specific implementation of FTW,
+  provides boot-time service for fault tolerant write capability for block devices in 
+  EFI SMM environment.  The protocol provides for non-volatile storage of the intermediate 
+  data and private information a caller would need to recover from a critical fault, 
+  such as a power failure.   
+
+Copyright (c) 2010, 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 __SMM_FAULT_TOLERANT_WRITE_H__
+#define __SMM_FAULT_TOLERANT_WRITE_H__
+
+#include <Protocol/FaultTolerantWrite.h>
+
+#define EFI_SMM_FAULT_TOLERANT_WRITE_PROTOCOL_GUID \
+  { \
+    0x3868fc3b, 0x7e45, 0x43a7, { 0x90, 0x6c, 0x4b, 0xa4, 0x7d, 0xe1, 0x75, 0x4d } \
+  }
+
+//
+// SMM Fault Tolerant Write protocol structure is the same as Fault Tolerant Write protocol.  
+// The SMM one is intend to run in SMM environment, which means it can be used by 
+// SMM drivers after ExitPmAuth. 
+// 
+typedef EFI_FAULT_TOLERANT_WRITE_PROTOCOL EFI_SMM_FAULT_TOLERANT_WRITE_PROTOCOL;
+
+extern EFI_GUID gEfiSmmFaultTolerantWriteProtocolGuid;
+
+#endif