UefiCpuPkg: Add SMM Communication PPI and Handler Modules

Add modules that produce the SMM Communications PPI and
install a SW SMI handler for SMM Communication requests

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Michael Kinney <michael.d.kinney@intel.com>
Reviewed-by: Jeff Fan <jeff.fan@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18634 6f19259b-4bc3-4df7-8a09-765794883524

UefiCpuPkg/PiSmmCommunication/PiSmmCommunicationPrivate.h

@@ -0,0 +1,30 @@
+/** @file
+PiSmmCommunication private data structure
+
+Copyright (c) 2010 - 2015, 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 _SMM_COMMUNICATION_PRIVATE_H_
+#define _SMM_COMMUNICATION_PRIVATE_H_
+
+#pragma pack(push, 1)
+
+#define SMM_COMMUNICATION_SIGNATURE SIGNATURE_32 ('S','M','M','C')
+
+typedef struct {
+  UINT32                   Signature;
+  UINT32                   SwSmiNumber;
+  EFI_PHYSICAL_ADDRESS     BufferPtrAddress;
+} EFI_SMM_COMMUNICATION_CONTEXT;
+
+#pragma pack(pop)
+
+#endif