MdeModulePkg: Add DxeGcdCorePlatformHookLib

The library provides the function to perform the platform hooks after
Gcd core is initialized.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>

MdeModulePkg/Core/Dxe/DxeMain.h

@@ -93,7 +93,7 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #include <Library/DxeServicesLib.h>
 #include <Library/DebugAgentLib.h>
 #include <Library/CpuExceptionHandlerLib.h>
-
+#include <Library/DxeGcdCorePlatformHookLib.h>
 
 //
 // attributes for reserved memory before it is promoted to system memory

MdeModulePkg/Core/Dxe/DxeMain.inf

@@ -100,6 +100,7 @@
   DebugAgentLib
   CpuExceptionHandlerLib
   PcdLib
+  DxeGcdCorePlatformHookLib
 
 [Guids]
   gEfiEventMemoryMapChangeGuid                  ## PRODUCES             ## Event

MdeModulePkg/Core/Dxe/DxeMain/DxeMain.c

@@ -297,6 +297,11 @@ DxeMain (
   Status = CoreInitializeGcdServices (&HobStart, MemoryBaseAddress, MemoryLength);
   ASSERT_EFI_ERROR (Status);
 
+  //
+  // Call Platform hooks for Gcd
+  //
+  DxeGcdCorePlatformHookReady (&mDxeServices);
+
   //
   // Call constructor for all libraries
   //

MdeModulePkg/Include/Library/DxeGcdCorePlatformHookLib.h

@@ -0,0 +1,33 @@
+/** @file
+Library that provides platform hooks to perform post processing of Gcd memory map.
+
+Copyright (c) 2017, AMD Inc. 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.
+
+**/
+
+#ifndef __DXE_GCD_CORE_PLATFORM_HOOK_LIB_H__
+#define __DXE_GCD_CORE_PLATFORM_HOOK_LIB_H__
+
+
+/**
+  This function is hook point called after the GCD memory map is initialized,
+  it allows the platform to perform post processing before the GCD maps are
+  made available to other drivers.
+**/
+VOID
+EFIAPI
+DxeGcdCorePlatformHookReady (
+  EFI_DXE_SERVICES    *gDS
+  );
+
+
+#endif
+

MdeModulePkg/Library/DxeGcdCorePlatformHookLib/DxeGcdCorePlatformHookLibNull.c

@@ -0,0 +1,30 @@
+/** @file
+DxeCore Gcd Platform Hook NULL library instance.
+
+Copyright (c) 2017, AMD Inc. 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.
+
+**/
+
+#include <PiDxe.h>
+
+#include <Library/DxeGcdCorePlatformHookLib.h>
+
+/**
+  This function is hook point called after the GCD memory map is initialized,
+  it allows the platform to perform post processing before the GCD maps are
+  made available to other drivers.
+**/
+VOID
+EFIAPI
+DxeGcdCorePlatformHookReady (
+  EFI_DXE_SERVICES    *gDS
+  )
+{
+}

MdeModulePkg/Library/DxeGcdCorePlatformHookLib/DxeGcdCorePlatformHookLibNull.inf

@@ -0,0 +1,33 @@
+## @file
+#  GCD core platform hook lib
+
+#  Copyright (c) 2017, AMD Inc. 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                    = 1.25
+  BASE_NAME                      = DxeGcdCorePlatformHookLib
+  FILE_GUID                      = 7C1DC10D-D271-422a-AFF3-CBCF70344431
+  MODULE_TYPE                    = DXE_CORE
+  VERSION_STRING                 = 1.0
+
+  LIBRARY_CLASS                  = DxeGcdCorePlatformHookLib | DXE_CORE
+
+[Sources]
+  DxeGcdCorePlatformHookLibNull.c
+
+[Packages]
+  MdePkg/MdePkg.dec
+  MdeModulePkg/MdeModulePkg.dec
+
+[LibraryClasses]
+  BaseLib
+  DebugLib

MdeModulePkg/MdeModulePkg.dec

@@ -167,6 +167,8 @@
   ##
   NonDiscoverableDeviceRegistrationLib|Include/Library/NonDiscoverableDeviceRegistrationLib.h
 
+  DxeGcdCorePlatformHookLib|Include/Library/DxeGcdCorePlatformHookLib.h
+
 [Guids]
   ## MdeModule package token space guid
   # Include/Guid/MdeModulePkgTokenSpace.h

MdeModulePkg/MdeModulePkg.dsc

@@ -124,6 +124,7 @@
   HobLib|MdePkg/Library/DxeCoreHobLib/DxeCoreHobLib.inf
   MemoryAllocationLib|MdeModulePkg/Library/DxeCoreMemoryAllocationLib/DxeCoreMemoryAllocationLib.inf
   ExtractGuidedSectionLib|MdePkg/Library/DxeExtractGuidedSectionLib/DxeExtractGuidedSectionLib.inf
+  DxeGcdCorePlatformHookLib|MdeModulePkg/Library/DxeGcdCorePlatformHookLib/DxeGcdCorePlatformHookLibNull.inf
 
 [LibraryClasses.common.DXE_DRIVER]
   HobLib|MdePkg/Library/DxeHobLib/DxeHobLib.inf

OvmfPkg/OvmfPkgIa32X64.dsc

@@ -283,6 +283,7 @@
 !endif
   CpuExceptionHandlerLib|UefiCpuPkg/Library/CpuExceptionHandlerLib/DxeCpuExceptionHandlerLib.inf
   PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf
+  DxeGcdCorePlatformHookLib|MdeModulePkg/Library/DxeGcdCorePlatformHookLib/DxeGcdCorePlatformHookLibNull.inf
 
 [LibraryClasses.common.DXE_RUNTIME_DRIVER]
   PcdLib|MdePkg/Library/DxePcdLib/DxePcdLib.inf