From 96aace827e120bd6f3d947360d71795e14842508 Mon Sep 17 00:00:00 2001
From: jyao1 <jyao1@6f19259b-4bc3-4df7-8a09-765794883524>
Date: Wed, 16 Nov 2011 09:41:55 +0000
Subject: UEFI231 spec compliance: UEFI231 defines
 EFI_SMM_COMMUNICATION_ACPI_TABLE. We should move it from Pi/ dir to Uefi/
 dir. UEFI231 defines EFI_SMM_COMMUNICATE_HEADER. We should move it from
 Protocol/SmmCommunication.h to Uefi/ dir. The original file will still
 include the new data structure to keep compatibility.

signed-off-by: jyao1
reviewed-by: rsun3

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12724 6f19259b-4bc3-4df7-8a09-765794883524
---
 MdePkg/Include/Uefi/UefiAcpiDataTable.h | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

(limited to 'MdePkg/Include/Uefi/UefiAcpiDataTable.h')

diff --git a/MdePkg/Include/Uefi/UefiAcpiDataTable.h b/MdePkg/Include/Uefi/UefiAcpiDataTable.h
index d0245fca87..30a53559fd 100644
--- a/MdePkg/Include/Uefi/UefiAcpiDataTable.h
+++ b/MdePkg/Include/Uefi/UefiAcpiDataTable.h
@@ -23,6 +23,32 @@ typedef struct {
   GUID                          Identifier;
   UINT16                        DataOffset;
 } EFI_ACPI_DATA_TABLE;
+
+typedef struct {
+  EFI_ACPI_DATA_TABLE  UefiAcpiDataTable;
+  UINT32               SwSmiNumber;
+  UINT64               BufferPtrAddress;
+} EFI_SMM_COMMUNICATION_ACPI_TABLE;
+
+///
+/// To avoid confusion in interpreting frames, the communication buffer should always 
+/// begin with EFI_SMM_COMMUNICATE_HEADER
+///
+typedef struct {
+  ///
+  /// Allows for disambiguation of the message format.
+  ///
+  EFI_GUID  HeaderGuid;
+  ///
+  /// Describes the size of Data (in bytes) and does not include the size of the header.
+  ///
+  UINTN     MessageLength;
+  ///
+  /// Designates an array of bytes that is MessageLength in size.
+  ///
+  UINT8     Data[1];
+} EFI_SMM_COMMUNICATE_HEADER;
+
 #pragma pack()
 
 #endif
-- 
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