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diff --git a/OldMdePkg/Include/Protocol/AcpiTable.h b/OldMdePkg/Include/Protocol/AcpiTable.h
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+/** @file
+  This protocol may be used to install or remove an ACPI table from a platform.
+
+  Copyright (c) 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
+
+  @par Revision Reference:
+  ACPI Table Protocol from the UEFI 2.1 specification.
+
+**/
+
+#ifndef __ACPI_TABLE_H__
+#define __ACPI_TABLE_H__
+
+//
+// Global ID for the Acpi Table Protocol
+//
+#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;
+
+#define UEFI_ACPI_TABLE_SIGNATURE         EFI_SIGNATURE_32 ('U', 'E', 'F', 'I')
+
+/**
+  Installs an ACPI table into the RSDT/XSDT.
+
+  @param  This                   Protocol instance pointer. 
+  @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               Reurns 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 EFI_ACPI_TABLE_PROTOCOL                    *This,
+  IN VOID                                       *AcpiTableBuffer,
+  IN UINTN                                      AcpiTableBufferSize,
+  OUT UINTN                                     *TableKey
+  )
+;
+
+/**
+  Removes an ACPI table from the RSDT/XSDT.
+
+  @param  This                   Protocol instance pointer. 
+  @param  TableKey               Specifies the table to uninstall.  The key was 
+                                 returned from InstallAcpiTable(). 
+
+  @retval EFI_SUCCESS            The table was successfully uninstalled. 
+  @retval EFI_NOT_FOUND          TableKey does not refer to a valid key for a 
+                                 table entry. 
+
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EFI_ACPI_TABLE_UNINSTALL_ACPI_TABLE) (
+  IN EFI_ACPI_TABLE_PROTOCOL                    *This,
+  IN UINTN                                      TableKey
+  )
+;
+
+//
+// Interface structure for the ACPI Table Protocol
+//
+struct _EFI_ACPI_TABLE_PROTOCOL {
+  EFI_ACPI_TABLE_INSTALL_ACPI_TABLE    InstallAcpiTable;
+  EFI_ACPI_TABLE_UNINSTALL_ACPI_TABLE  UninstallAcpiTable;
+};
+
+//
+// Extern the GUID for protocol users.
+//
+extern EFI_GUID gEfiAcpiTableProtocolGuid;
+
+#endif