1 files changed, 108 insertions, 0 deletions
diff --git a/EdkCompatibilityPkg/Compatibility/PciCfg2OnPciCfgThunk/PciCfg2ToPciCfgThunk.inf b/EdkCompatibilityPkg/Compatibility/PciCfg2OnPciCfgThunk/PciCfg2ToPciCfgThunk.inf
new file mode 100644
index 0000000000..ea1b5c89dc
--- /dev/null
+++ b/EdkCompatibilityPkg/Compatibility/PciCfg2OnPciCfgThunk/PciCfg2ToPciCfgThunk.inf
@@ -0,0 +1,108 @@
+#/** @file
+# Module produces PciCfgPpi2 on top of PciCfgPpi. It also updates the 
+# PciCfg2Ppi pointer in the EFI_PEI_SERVICES upon a installation of
+# EcpPeiPciCfgPpi. 
+#
+# EcpPeiPciCfgPpi is installed by a framework module which
+# produce PciCfgPpi originally. Such framework module is updated based on the 
+# following rule to install EcpPeiPciCfgPpi instead of updating the PciCfg pointer
+# in the Framework PeiServicesTable: 
+# 
+# Search pattern:
+# 	   PeiServices->PciCfg = <*>;
+# Replace pattern:
+#         {
+#           static EFI_PEI_PPI_DESCRIPTOR gEcpPeiPciCfgPpiList = {
+#             (EFI_PEI_PPI_DESCRIPTOR_PPI | EFI_PEI_PPI_DESCRIPTOR_TERMINATE_LIST),
+#             &gEcpPeiPciCfgPpiGuid,
+#             <*>
+#           };
+#           (**PeiServices).InstallPpi (PeiServices, &gEcpPeiPciCfgPpiList);
+#         }
+# 
+# In addition, the PeiServicesTable definition in PeiApi.h is updated to
+# 
+# struct _EFI_PEI_SERVICES {
+#   EFI_TABLE_HEADER              Hdr;
+#   ...
+# 
+#   //
+#   // Pointer to PPI interface
+#   //
+# #if (PI_SPECIFICATION_VERSION < 0x00010000)
+# 
+#   PEI_CPU_IO_PPI                 *CpuIo;
+#   ECP_PEI_PCI_CFG_PPI        *PciCfg;  //Changed.
+# #else
+# ...
+# #endif
+# 
+# };
+# 
+# This change enable the detection of code segment which invokes PeiServices->PciCfg->Modify.
+# Such code causes a build break as ECP_PEI_PCI_CFG_PPI does not has "Modify" field. 
+# This should be updated to a call to PeiLibPciCfgModify as shown below:
+# 
+# Search pattern:
+# 		*->Modify(<*>); 
+# Replace pattern:
+# 		PeiLibPciCfgModify(<*>);
+#
+# PIWG's PI specification replaces Inte's EFI Specification 1.10.
+# EFI_PEI_PCI_CFG_PPI defined in Inte's EFI Specification 1.10 is replaced by
+# EFI_PEI_PCI_CFG2_PPI in PI 1.0.
+# This module produces PciCfgPpi on top of PciCfgPpi2. This module is used on platform when both of
+# these two conditions are true:
+# 1) Framework module present that produces PCI CFG PPI  AND
+# 2) PI module that produces PCI CFG2 is not present
+
+#
+# PEIM to provide the Variable functionality.
+# Copyright (c) 2006 - 2007, 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.
+#
+#
+#**/
+
+[Defines]
+  INF_VERSION                    = 0x00010005
+  BASE_NAME                      = PciCfg2ToPciCfgThunk
+  FILE_GUID                      = 41401688-2862-431b-BAAC-6ECADAC384AB
+  MODULE_TYPE                    = PEIM
+  VERSION_STRING                 = 1.0
+  EDK_RELEASE_VERSION            = 0x00020000
+  EFI_SPECIFICATION_VERSION      = 0x00020000
+
+  ENTRY_POINT                    = PeimInitializePciCfg2
+
+#
+# The following information is for reference only and not required by the build tools.
+#
+#  VALID_ARCHITECTURES           = IA32 X64 IPF EBC
+#
+
+[Sources.common]
+  PciCfg2ToPciCfgThunk.c
+
+[Packages]
+  MdePkg/MdePkg.dec
+  IntelFrameworkPkg/IntelFrameworkPkg.dec
+  EdkCompatibilityPkg/EdkCompatibilityPkg.dec
+
+[LibraryClasses]
+  PeimEntryPoint
+  DebugLib
+
+[Ppis]
+  gEfiPciCfgPpiInServiceTableGuid
+  gEfiPciCfg2PpiGuid
+  gEcpPeiPciCfgPpiGuid
+
+[Depex]
+  TRUE