From 9fba8e7d3dad15fdd624ed2f5d34942cca590f76 Mon Sep 17 00:00:00 2001
From: jljusten <jljusten@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Tue, 19 Jul 2011 20:46:45 +0000
Subject: MdeModulePkg: Add SmmCommunication PPI definition

Signed-off-by: jljusten
Reviewed-by: mdkinney
Reviewed-by: geekboy15a
Reviewed-by: jyao1
Reviewed-by: lgao4

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12028 6f19259b-4bc3-4df7-8a09-765794883524
---
 MdeModulePkg/Include/Ppi/SmmCommunication.h | 64 +++++++++++++++++++++++++++++
 MdeModulePkg/MdeModulePkg.dec               |  3 ++
 2 files changed, 67 insertions(+)
 create mode 100644 MdeModulePkg/Include/Ppi/SmmCommunication.h

diff --git a/MdeModulePkg/Include/Ppi/SmmCommunication.h b/MdeModulePkg/Include/Ppi/SmmCommunication.h
new file mode 100644
index 0000000000..a22ed9f6d3
--- /dev/null
+++ b/MdeModulePkg/Include/Ppi/SmmCommunication.h
@@ -0,0 +1,64 @@
+/** @file
+  EFI SMM Communication PPI definition.
+
+  This Ppi provides a means of communicating between PEIM and SMI 
+  handlers inside of SMM.
+  This Ppi is produced and consumed only in S3 resume boot path.
+  It is NOT available in normal boot path.
+
+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 _SMM_COMMUNICATION_PPI_H_
+#define _SMM_COMMUNICATION_PPI_H_
+
+#define EFI_PEI_SMM_COMMUNICATION_PPI_GUID \
+  { \
+    0xae933e1c, 0xcc47, 0x4e38, { 0x8f, 0xe, 0xe2, 0xf6, 0x1d, 0x26, 0x5, 0xdf } \
+  }
+
+typedef struct _EFI_PEI_SMM_COMMUNICATION_PPI  EFI_PEI_SMM_COMMUNICATION_PPI;
+
+/**
+  Communicates with a registered handler.
+  
+  This function provides a service to send and receive messages from a registered UEFI service.
+
+  @param[in] This                The EFI_PEI_SMM_COMMUNICATION_PPI instance.
+  @param[in] CommBuffer          A pointer to the buffer to convey into SMRAM.
+  @param[in] CommSize            The size of the data buffer being passed in.On exit, the size of data
+                                 being returned. Zero if the handler does not wish to reply with any data.
+
+  @retval EFI_SUCCESS            The message was successfully posted.
+  @retval EFI_INVALID_PARAMETER  The CommBuffer was NULL.
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EFI_PEI_SMM_COMMUNICATE)(
+  IN CONST EFI_PEI_SMM_COMMUNICATION_PPI   *This,
+  IN OUT VOID                              *CommBuffer,
+  IN OUT UINTN                             *CommSize
+  );
+
+///
+/// EFI SMM Communication Protocol provides runtime services for communicating
+/// between DXE drivers and a registered SMI handler.
+///
+struct _EFI_PEI_SMM_COMMUNICATION_PPI {
+  EFI_PEI_SMM_COMMUNICATE  Communicate;
+};
+
+extern EFI_GUID gEfiPeiSmmCommunicationPpiGuid;
+
+#endif
diff --git a/MdeModulePkg/MdeModulePkg.dec b/MdeModulePkg/MdeModulePkg.dec
index a983c55972..0a9cdcd9b4 100644
--- a/MdeModulePkg/MdeModulePkg.dec
+++ b/MdeModulePkg/MdeModulePkg.dec
@@ -204,6 +204,9 @@
   ## Include/Ppi/Capsule.h
   gPeiCapsulePpiGuid             = { 0x3acf33ee, 0xd892, 0x40f4, { 0xa2, 0xfc, 0x38, 0x54, 0xd2, 0xe1, 0x32, 0x3d }}
 
+  ## Include/Ppi/SmmCommunication.h
+  gEfiPeiSmmCommunicationPpiGuid   =  { 0xae933e1c, 0xcc47, 0x4e38, { 0x8f, 0xe, 0xe2, 0xf6, 0x1d, 0x26, 0x5, 0xdf }}
+
   ## Include/Ppi/SmmAccess.h
   gPeiSmmAccessPpiGuid          =  { 0x268f33a9, 0xcccd, 0x48be, { 0x88, 0x17, 0x86, 0x5, 0x3a, 0xc3, 0x2e, 0xd6 }}
 
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