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diff --git a/Core/MdePkg/Library/DxePcdLib/DxePcdLib.inf b/Core/MdePkg/Library/DxePcdLib/DxePcdLib.inf
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+++ b/Core/MdePkg/Library/DxePcdLib/DxePcdLib.inf
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+## @file
+# Instance of PCD Library using PCD Protocol.
+#
+# There are two PCD protocols as follows:
+#   1) PCD_PROTOCOL
+#      It is EDKII implementation which support Dynamic/DynamicEx Pcds.
+#   2) EFI_PCD_PROTOCOL
+#      It is defined by PI specification 1.2, Vol 3 which only support dynamicEx 
+#      type Pcd.
+#
+# For dynamicEx type PCD, it is compatible between PCD_PROTOCOL and EFI_PCD_PROTOCOL.
+#
+# This library instance uses the PCD_PROTOCOL to handle dynamic PCD request and use
+# EFI_PCD_PROTOCOL to handle dynamicEx type PCD.
+#
+# Note: A driver of type DXE_RUNTIME_DRIVER and DXE_SMM_DRIVER can only use this DxePcdLib 
+#  in their initialization without any issues to access Dynamic and DynamicEx PCD. They can't 
+#  access Dynamic and DynamicEx PCD in the implementation of runtime services and SMI handlers.
+#  Because EFI_PCD_PROTOCOL is DXE protocol that is not aviable in OS runtime phase.  
+#
+# Copyright (c) 2007 - 2014, 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.
+#
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x00010005
+  BASE_NAME                      = DxePcdLib
+  MODULE_UNI_FILE                = DxePcdLib.uni
+  FILE_GUID                      = af97eb89-4cc6-45f8-a514-ca025b346480
+  MODULE_TYPE                    = DXE_DRIVER
+  VERSION_STRING                 = 1.0
+  LIBRARY_CLASS                  = PcdLib|DXE_CORE DXE_DRIVER DXE_RUNTIME_DRIVER DXE_SAL_DRIVER DXE_SMM_DRIVER SMM_CORE UEFI_APPLICATION UEFI_DRIVER 
+
+#
+#  VALID_ARCHITECTURES           = IA32 X64 IPF EBC
+#
+
+[Sources]
+  DxePcdLib.c
+
+
+[Packages]
+  MdePkg/MdePkg.dec
+
+
+[LibraryClasses]
+  BaseMemoryLib
+  UefiBootServicesTableLib
+  DebugLib
+
+
+[Protocols]
+  gPcdProtocolGuid                              ## SOMETIMES_CONSUMES
+  gEfiPcdProtocolGuid                           ## CONSUMES
+  gGetPcdInfoProtocolGuid                       ## SOMETIMES_CONSUMES
+  gEfiGetPcdInfoProtocolGuid                    ## SOMETIMES_CONSUMES
+
+[Depex.common.DXE_DRIVER, Depex.common.DXE_RUNTIME_DRIVER, Depex.common.DXE_SAL_DRIVER, Depex.common.DXE_SMM_DRIVER]
+  gEfiPcdProtocolGuid
+