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diff --git a/MdePkg/Include/Protocol/Bds.h b/MdePkg/Include/Protocol/Bds.h
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+/** @file
+  Boot Device Selection Architectural Protocol as defined in PI spec Volume 2 DXE
+
+  When the DXE core is done it calls the BDS via this protocol.
+
+  Copyright (c) 2006 - 2008, 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 __ARCH_PROTOCOL_BDS_H__
+#define __ARCH_PROTOCOL_BDS_H__
+
+///
+/// Global ID for the BDS Architectural Protocol
+///
+#define EFI_BDS_ARCH_PROTOCOL_GUID \
+  { 0x665E3FF6, 0x46CC, 0x11d4, {0x9A, 0x38, 0x00, 0x90, 0x27, 0x3F, 0xC1, 0x4D } }
+
+///
+/// Declare forward reference for the BDS Architectural Protocol
+///
+typedef struct _EFI_BDS_ARCH_PROTOCOL   EFI_BDS_ARCH_PROTOCOL;
+
+/**
+  This function uses policy data from the platform to determine what operating 
+  system or system utility should be loaded and invoked.  This function call 
+  also optionally make the use of user input to determine the operating system 
+  or system utility to be loaded and invoked.  When the DXE Core has dispatched 
+  all the drivers on the dispatch queue, this function is called.  This 
+  function will attempt to connect the boot devices required to load and invoke 
+  the selected operating system or system utility.  During this process, 
+  additional firmware volumes may be discovered that may contain addition DXE 
+  drivers that can be dispatched by the DXE Core.   If a boot device cannot be 
+  fully connected, this function calls the DXE Service Dispatch() to allow the 
+  DXE drivers from any newly discovered firmware volumes to be dispatched.  
+  Then the boot device connection can be attempted again.  If the same boot 
+  device connection operation fails twice in a row, then that boot device has 
+  failed, and should be skipped.  This function should never return.
+
+  @param  This             The EFI_BDS_ARCH_PROTOCOL instance.
+
+  @return None.
+
+**/
+typedef
+VOID
+(EFIAPI *EFI_BDS_ENTRY)(
+  IN EFI_BDS_ARCH_PROTOCOL  *This
+  );
+
+///
+/// The EFI_BDS_ARCH_PROTOCOL transfers control from DXE to an operating 
+/// system or a system utility.  If there are not enough drivers initialized 
+/// when this protocol is used to access the required boot device(s), then 
+/// this protocol should add drivers to the dispatch queue and return control 
+/// back to the dispatcher.  Once the required boot devices are available, then 
+/// the boot device can be used to load and invoke an OS or a system utility.
+///
+struct _EFI_BDS_ARCH_PROTOCOL {
+  EFI_BDS_ENTRY Entry;
+};
+
+extern EFI_GUID gEfiBdsArchProtocolGuid;
+
+#endif