1, PeiPcdLib use EFI_PEI_PCD_PPI defined in PI 1.2 to handle dynamicEx type PCD request.

2, DxePcdLib use EFI_PCD_PROTOCOL defined in PI 1.2 to handle dynamicEx type PCD request.
3, There is no change for dynamic type PCD.
4, Refine the INF's comments.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9473 6f19259b-4bc3-4df7-8a09-765794883524

1 files changed, 17 insertions, 3 deletions

diff --git a/MdePkg/Library/PeiPcdLib/PeiPcdLib.inf b/MdePkg/Library/PeiPcdLib/PeiPcdLib.inf
index 17363b1450..a714147c12 100644
--- a/MdePkg/Library/PeiPcdLib/PeiPcdLib.inf
+++ b/MdePkg/Library/PeiPcdLib/PeiPcdLib.inf
@@ -1,9 +1,21 @@
 #/** @file

 # Instance of PCD Library using PCD PPI.

 #

+# There are two PCD PPIs as follows:

+#   1) PCD_PPI 

+#      It is EDKII implementation which support Dynamic/DynamicEx Pcds.

+#   2) EFI_PEI_PCD_PPI

+#      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_PPI and EFI_PEI_PCD_PPI.

+# This library instance uses the PCD_PPI to handle dynamic PCD request and use

+# EFI_PEI_PCD_PPI to handle dynamicEx type PCD.

+#

+# This library instance assume the PCD_PPI and EFI_PEI_PCD_PPI are both installed early.

+#

 # PCD Library that uses the PCD PPI to access Dynamic and DynamicEx PCD entries

 #

-# Copyright (c) 2007 - 2008, Intel Corporation

+# Copyright (c) 2007 - 2009, 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

@@ -44,6 +56,8 @@
 

 [Ppis]

   gPcdPpiGuid                                   ## CONSUMES

-

+  gEfiPeiPcdPpiGuid                             ## CONSUMES

+  

 [depex]

-  gPcdPpiGuid

+  gEfiPeiPcdPpiGuid

+  
\ No newline at end of file