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diff --git a/EDK/Foundation/Library/EdkIIGlueLib/Library/PeiSmbusLib/PeiSmbusLibInternal.h b/EDK/Foundation/Library/EdkIIGlueLib/Library/PeiSmbusLib/PeiSmbusLibInternal.h
new file mode 100644
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--- /dev/null
+++ b/EDK/Foundation/Library/EdkIIGlueLib/Library/PeiSmbusLib/PeiSmbusLibInternal.h
@@ -0,0 +1,68 @@
+/*++
+
+Copyright (c) 2004 - 2006, 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:
+
+  PeiSmbusLibInternal.h
+    
+Abstract: 
+
+  Declarations of internal functions in PeiSmbusLib.
+
+--*/
+
+#ifndef __PEI_SMBUS_LIB_INTERNAL_H__
+#define __PEI_SMBUS_LIB_INTERNAL_H__
+
+#include "EdkIIGluePeim.h"
+
+
+#define SMBUS_LIB_SLAVE_ADDRESS(SmBusAddress)      (((SmBusAddress) >> 1)  & 0x7f)
+#define SMBUS_LIB_COMMAND(SmBusAddress)            (((SmBusAddress) >> 8)  & 0xff)
+#define SMBUS_LIB_LENGTH(SmBusAddress)             (((SmBusAddress) >> 16) & 0x3f)
+#define SMBUS_LIB_PEC(SmBusAddress)     ((BOOLEAN) (((SmBusAddress) & SMBUS_LIB_PEC_BIT) != 0))
+#define SMBUS_LIB_RESEARVED(SmBusAddress)          ((SmBusAddress) & ~(((1 << 22) - 2) | SMBUS_LIB_PEC_BIT))
+
+//
+// Declaration for internal functions
+//
+/**
+  Executes an SMBus operation to an SMBus controller. 
+
+  This function provides a standard way to execute Smbus script
+  as defined in the SmBus Specification. The data can either be of
+  the Length byte, word, or a block of data.
+
+  @param  SmbusOperation  Signifies which particular SMBus hardware protocol instance that it will use to
+                          execute the SMBus transactions.
+  @param  SmBusAddress    Address that encodes the SMBUS Slave Address,
+                          SMBUS Command, SMBUS Data Length, and PEC.
+  @param  Length          Signifies the number of bytes that this operation will do. The maximum number of
+                          bytes can be revision specific and operation specific.
+  @param  Buffer          Contains the value of data to execute to the SMBus slave device. Not all operations
+                          require this argument. The length of this buffer is identified by Length.
+  @param  Status          Return status for the executed command.
+                          This is an optional parameter and may be NULL.
+
+  @return The actual number of bytes that are executed for this operation.
+
+**/
+UINTN
+InternalSmBusExec (
+  IN     EFI_SMBUS_OPERATION        SmbusOperation,
+  IN     UINTN                      SmBusAddress,
+  IN     UINTN                      Length,
+  IN OUT VOID                       *Buffer,
+  OUT    RETURN_STATUS              *Status        OPTIONAL
+  );
+
+#endif