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diff --git a/MdePkg/Include/Protocol/AcpiTable.h b/MdePkg/Include/Protocol/AcpiTable.h
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+/** @file
+  The file provides the protocol to install or remove an ACPI
+  table from a platform. 
+  
+  Copyright (c) 2006 - 2007, Intel Corporation
+  All rights reserved. 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.             
+
+  Module Name: AcpiTable.h
+
+**/
+
+#ifndef __ACPI_TABLE_H___
+#define __ACPI_TABLE_H___
+
+#define EFI_ACPI_TABLE_PROTOCOL_GUID \
+  { 0xffe06bdd, 0x6107, 0x46a6, { 0x7b, 0xb2, 0x5a, 0x9c, 0x7e, 0xc5, 0x27, 0x5c }}
+
+
+typedef struct _EFI_ACPI_TABLE_PROTOCOL EFI_ACPI_TABLE_PROTOCOL;
+
+/**
+
+  The InstallAcpiTable() function allows a caller to install an   
+  ACPI table. When successful, the table will be linked by the   
+  RSDT/XSDT. AcpiTableBuffer specifies the table to be installed.   
+  InstallAcpiTable() will make a copy of the table and insert the   
+  copy into the RSDT/XSDT. InstallAcpiTable() must insert the new   
+  table at the end of the RSDT/XSDT. To prevent namespace   
+  collision, ACPI tables may be created using UEFI ACPI table   
+  format. See Appendix O. On successful output, TableKey is   
+  initialized with a unique key. Its value may be used in a   
+  subsequent call to UninstallAcpiTable to remove an ACPI table.   
+  If an EFI application is running at the time of this call, the   
+  relevant EFI_CONFIGURATION_TABLE pointer to the RSDT is no   
+  longer considered valid.   
+
+
+  @param This A pointer to a EFI_ACPI_TABLE_PROTOCOL.
+
+  @param AcpiTableBuffer  A pointer to a buffer containing the
+                          ACPI table to be installed.
+
+  @param AcpiTableBufferSize  Specifies the size, in bytes, of
+                              the AcpiTableBuffer buffer.
+
+
+  @param TableKey   Returns a key to refer to the ACPI table.
+  
+  @retval EFI_SUCCESS The table was successfully inserted
+  
+  @retval EFI_INVALID_PARAMETER Either AcpiTableBuffer is NULL,
+                                TableKey is NULL, or
+                                AcpiTableBufferSize and the size
+                                field embedded in the ACPI table
+                                pointed to by AcpiTableBuffer
+                                are not in sync.
+  
+  @retval EFI_OUT_OF_RESOURCES  Insufficient resources exist to
+                                complete the request.
+  
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EFI_ACPI_TABLE_INSTALL_ACPI_TABLE) (
+  IN CONST  EFI_ACPI_TABLE_PROTOCOL *This,
+  IN CONST  VOID                    *AcpiTableBuffer,
+  IN CONST  UINTN                   AcpiTableBufferSize,
+  OUT       UINTN                   *TableKey
+);
+
+
+/**
+  
+  The UninstallAcpiTable() function allows a caller to remove an
+  ACPI table. The routine will remove its reference from the
+  RSDT/XSDT. A table is referenced by the TableKey parameter
+  returned from a prior call to InstallAcpiTable(). If an EFI
+  application is running at the time of this call, the relevant
+  EFI_CONFIGURATION_TABLE pointer to the RSDT is no longer
+  considered valid.
+
+  @param This A pointer to a EFI_ACPI_TABLE_PROTOCOL.
+
+  @param TableKey Specifies the table to uninstall. The key was
+                  returned from InstallAcpiTable().
+
+  @retval EFI_SUCCESS The table was successfully inserted
+
+  @retval EFI_NOT_FOUND TableKey does not refer to a valid key
+                        for a table entry.
+
+  @retval EFI_OUT_OF_RESOURCES  Insufficient resources exist to
+                                complete the request.
+  
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EFI_ACPI_TABLE_UNINSTALL_ACPI_TABLE) (
+  IN CONST  EFI_ACPI_TABLE_PROTOCOL *This,
+  IN CONST  UINTN                   TableKey
+);
+
+/**
+  The EFI_ACPI_TABLE_PROTOCOL provides the ability for a component
+  to install and uninstall ACPI tables from a platform.
+
+
+  @param InstallAcpiTable Installs an ACPI table into the
+                          system.
+
+  @param UninstallAcpiTable Removes a previously installed ACPI
+                            table from the system.
+
+**/   
+struct _EFI_ACPI_TABLE_PROTOCOL {
+  EFI_ACPI_TABLE_INSTALL_ACPI_TABLE   InstallAcpiTable;
+  EFI_ACPI_TABLE_UNINSTALL_ACPI_TABLE UninstallAcpiTable;
+};
+
+extern EFI_GUID gEfiAcpiTableProtocolGuid;
+
+#endif
+