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diff --git a/ReferenceCode/Chipset/SystemAgent/MemoryInit/Pei/Source/WriteTraining/MrcWriteDqDqs.h b/ReferenceCode/Chipset/SystemAgent/MemoryInit/Pei/Source/WriteTraining/MrcWriteDqDqs.h
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+/** @file
+  The third stage of the write training is determining the PI setting for each
+  byte strobe to make sure that data is sent at the optimal location.
+  In order to do that a pattern of alternating zeros and ones is written to a block of the memory, and then read out.
+  By identifying the location where it is farthest away from where errors are shown the DQS will be aligned to the
+  center of the eye.
+
+@copyright
+  Copyright (c) 1999 - 2012 Intel Corporation. All rights reserved
+  This software and associated documentation (if any) is furnished
+  under a license and may only be used or copied in accordance
+  with the terms of the license. Except as permitted by such
+  license, no part of this software or documentation may be
+  reproduced, stored in a retrieval system, or transmitted in any
+  form or by any means without the express written consent of
+  Intel Corporation.
+
+  This file contains an 'Intel Peripheral Driver' and uniquely
+  identified as "Intel Reference Module" and is
+  licensed for Intel CPUs and chipsets under the terms of your
+  license agreement with Intel or your vendor.  This file may
+  be modified by the user, subject to additional terms of the
+  license agreement.
+**/
+
+#ifndef _MrcWriteDqDqs_h_
+#define _MrcWriteDqDqs_h_
+
+#include "MrcTypes.h"
+#include "McAddress.h"
+#include "MrcApi.h"
+#include "MrcCommandTraining.h"
+#include "MrcCommon.h"
+#include "MrcGlobal.h"
+#include "MrcReset.h"
+
+/**
+  @brief
+  this function executes the write timing centering in 2D.
+    Final write timing centering using 2D algorithm and per bit optimization.
+
+    @param[in] MrcData - Include all MRC global data.
+
+    @retval MrcStatus -  if it succeded returns mrcSuccess
+
+  **/
+extern
+MrcStatus
+MrcWriteTimingCentering (
+  IN     MrcParameters *const MrcData
+  );
+
+/**
+  @brief
+  this function executes the write timing centering in 2D.
+    Final write timing centering using 2D algorithm and per bit optimization.
+
+    @param[in] MrcData - Include all MRC global data.
+
+    @retval MrcStatus -  if it succeded returns mrcSuccess
+
+  **/
+extern
+MrcStatus
+MrcWriteTimingCentering2D (
+  IN     MrcParameters *const MrcData
+  );
+
+/**
+@brief
+  Rank Margin Tool - Measure margins across various parameters
+
+  @param[in, out] MrcData - Include all MRC global data.
+
+  @retval MrcStatus -  mrcSuccess if succeded
+**/
+extern
+MrcStatus
+MrcRankMarginTool (
+  IN OUT MrcParameters *const MrcData
+  );
+
+/**
+@brief
+  this function execute the write timing centering in 2D.
+  Final write timing centering using 2D algorithm and per bit optimization
+
+  @param[in, out] MrcData - Include all MRC global data.
+
+  @retval MrcStatus -  if it succeded returns mrcSuccess
+**/
+/**
+@brief
+  Peform Read Voltage Centering in 2D.
+  Note: This function currently only supports param = WrV
+
+  @param[in, out] MrcData       - Include all MRC global data.
+
+  @retval MrcStatus -    if it succeded return mrcSuccess
+  @todo - Need option for loopcount
+**/
+extern
+MrcStatus
+MrcWriteVoltageCentering2D (
+  IN OUT MrcParameters *const MrcData
+  );
+
+#endif // _MrcWriteDqDqs_h_