Add SMM Variable implementation.

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

MdeModulePkg/Universal/Variable/RuntimeDxe/VariableSmmCommon.h

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+/** @file
+
+  The internal header file includes the common header files shared 
+  by VariableSmm module and VariableSmmRuntimeDxe module.
+
+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         
+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.  
+
+**/
+
+#ifndef _VARIABLE_SMM_COMMON_H_
+#define _VARIABLE_SMM_COMMON_H_
+
+#include <PiDxe.h>
+
+#include <Protocol/SmmVariable.h>
+#include <Protocol/SmmFirmwareVolumeBlock.h>
+#include <Guid/VariableFormat.h>
+
+#define EFI_SMM_VARIABLE_WRITE_GUID \
+  { 0x93ba1826, 0xdffb, 0x45dd, { 0x82, 0xa7, 0xe7, 0xdc, 0xaa, 0x3b, 0xbd, 0xf3 } }
+
+///
+/// Size of SMM communicate header, without including the payload.
+///
+#define SMM_COMMUNICATE_HEADER_SIZE  (OFFSET_OF (EFI_SMM_COMMUNICATE_HEADER, Data))
+
+///
+/// Size of SMM variable communicate header, without including the payload.
+///
+#define SMM_VARIABLE_COMMUNICATE_HEADER_SIZE  (OFFSET_OF (SMM_VARIABLE_COMMUNICATE_HEADER, Data))
+
+
+#endif