X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=MdePkg%2FLibrary%2FDxePcdLib%2FDxePcdLib.inf;h=3d4d21b442b4879c6ffb0b06a40994f805196787;hb=HEAD;hp=de59815f97c65b2adad78d5d92075e0815ef5e09;hpb=25366245f586af7de63fa60ba328879707f25563;p=mirror_edk2.git

diff --git a/MdePkg/Library/DxePcdLib/DxePcdLib.inf b/MdePkg/Library/DxePcdLib/DxePcdLib.inf
index de59815f97..3d4d21b442 100644
--- a/MdePkg/Library/DxePcdLib/DxePcdLib.inf
+++ b/MdePkg/Library/DxePcdLib/DxePcdLib.inf
@@ -1,37 +1,44 @@
-#/** @file
-# PCD Library instance implemented with PCD Protocol
+## @file
+# Instance of PCD Library using PCD Protocol.
 #
-# This library instance implement the APIs listed 
-#  in PCD library class defined in MDE library specification.
-#  It is used by modules in DXE phase.
-# Copyright (c) 2007, Intel Corporation.
+# 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.
 #
-#  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.
+# 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 available in OS runtime phase.
+#
+# Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
+#
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#
+##
 
 [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 UEFI_APPLICATION UEFI_DRIVER 
-  EDK_RELEASE_VERSION            = 0x00020000
-  EFI_SPECIFICATION_VERSION      = 0x00020000
-  CONSTRUCTOR                    = PcdLibConstructor
+  LIBRARY_CLASS                  = PcdLib|DXE_CORE DXE_DRIVER DXE_RUNTIME_DRIVER DXE_SMM_DRIVER SMM_CORE UEFI_APPLICATION UEFI_DRIVER
 
 #
-#  VALID_ARCHITECTURES           = IA32 X64 IPF EBC
+#  VALID_ARCHITECTURES           = IA32 X64 EBC
 #
 
-[Sources.common]
+[Sources]
   DxePcdLib.c
 
 
@@ -46,8 +53,11 @@
 
 
 [Protocols]
-  gPcdProtocolGuid                              # PROTOCOL ALWAYS_CONSUMED
+  gPcdProtocolGuid                              ## SOMETIMES_CONSUMES
+  gEfiPcdProtocolGuid                           ## CONSUMES
+  gGetPcdInfoProtocolGuid                       ## SOMETIMES_CONSUMES
+  gEfiGetPcdInfoProtocolGuid                    ## SOMETIMES_CONSUMES
 
-[Depex]
-  gPcdProtocolGuid
+[Depex.common.DXE_DRIVER, Depex.common.DXE_RUNTIME_DRIVER, Depex.common.DXE_SAL_DRIVER, Depex.common.DXE_SMM_DRIVER]
+  gEfiPcdProtocolGuid