3 files changed, 117 insertions, 0 deletions
diff --git a/Core/MdePkg/Library/DxeServicesTableLib/DxeServicesTableLib.c b/Core/MdePkg/Library/DxeServicesTableLib/DxeServicesTableLib.c
new file mode 100644
index 0000000000..7cb94cee70
--- /dev/null
+++ b/Core/MdePkg/Library/DxeServicesTableLib/DxeServicesTableLib.c
@@ -0,0 +1,68 @@
+/** @file
+  This library implement library class DxeServiceTableLib.
+  It produce EFI_DXE_SERVICE pointer in global variable gDS in library's constructure.
+  
+  A DXE driver can use gDS pointer to access services in EFI_DXE_SERVICE, if this
+  DXE driver declare that use DxeServicesTableLib library class and link to this 
+  library instance.
+
+  Please attention this library instance can not be used util EFI_SYSTEM_TABLE was 
+  initialized.
+  
+  This library contains contruct function to retrieve EFI_DXE_SERIVCE, this construct
+  function will be invoked in DXE driver's autogen file.
+
+  Copyright (c) 2006 - 2008, 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.
+
+**/
+
+#include <PiDxe.h>
+#include <Guid/DxeServices.h>
+#include <Library/DxeServicesTableLib.h>
+#include <Library/DebugLib.h>
+#include <Library/UefiLib.h>
+
+//
+// Cache copy of the DXE Services Table
+//
+EFI_DXE_SERVICES  *gDS      = NULL;
+
+/**
+  The constructor function caches the pointer of DXE Services Table.
+
+  The constructor function caches the pointer of DXE Services Table.
+  It will ASSERT() if that operation fails.
+  It will ASSERT() if the pointer of DXE Services Table is NULL.
+  It will always return EFI_SUCCESS.
+
+  @param  ImageHandle   The firmware allocated handle for the EFI image.
+  @param  SystemTable   A pointer to the EFI System Table.
+
+  @retval EFI_SUCCESS   The constructor always returns EFI_SUCCESS.
+
+**/
+EFI_STATUS
+EFIAPI
+DxeServicesTableLibConstructor (
+  IN EFI_HANDLE        ImageHandle,
+  IN EFI_SYSTEM_TABLE  *SystemTable
+  )
+{
+  EFI_STATUS  Status;
+
+  //
+  // Cache copy of the DXE Services Table
+  //
+  Status = EfiGetSystemConfigurationTable (&gEfiDxeServicesTableGuid, (VOID **) &gDS);
+  ASSERT_EFI_ERROR (Status);
+  ASSERT (gDS != NULL);
+
+  return Status;
+}
diff --git a/Core/MdePkg/Library/DxeServicesTableLib/DxeServicesTableLib.inf b/Core/MdePkg/Library/DxeServicesTableLib/DxeServicesTableLib.inf
new file mode 100644
index 0000000000..8ad198c2f3
--- /dev/null
+++ b/Core/MdePkg/Library/DxeServicesTableLib/DxeServicesTableLib.inf
@@ -0,0 +1,49 @@
+## @file
+# Instance of DXE Services Table Library using EFI Configuration Table.
+#
+# DXE Services Table Library that retrieves a pointer to the DXE Services
+# Table from the Configuration Table in the EFI System Table.
+#
+# 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                      = DxeServicesTableLib
+  MODULE_UNI_FILE                = DxeServicesTableLib.uni
+  FILE_GUID                      = baa1baa3-0a8d-402c-8042-985115fae953
+  MODULE_TYPE                    = DXE_DRIVER
+  VERSION_STRING                 = 1.0
+  LIBRARY_CLASS                  = DxeServicesTableLib|DXE_DRIVER DXE_RUNTIME_DRIVER DXE_SAL_DRIVER DXE_SMM_DRIVER UEFI_APPLICATION UEFI_DRIVER SMM_CORE
+
+  CONSTRUCTOR                    = DxeServicesTableLibConstructor
+
+#
+#  VALID_ARCHITECTURES           = IA32 X64 IPF EBC
+#
+
+[Sources]
+  DxeServicesTableLib.c
+
+
+[Packages]
+  MdePkg/MdePkg.dec
+
+
+[LibraryClasses]
+  UefiLib
+  DebugLib
+
+
+[Guids]
+  gEfiDxeServicesTableGuid                      ## CONSUMES  ## SystemTable
+
diff --git a/Core/MdePkg/Library/DxeServicesTableLib/DxeServicesTableLib.uni b/Core/MdePkg/Library/DxeServicesTableLib/DxeServicesTableLib.uni
new file mode 100644
index 0000000000..099d7ad1bf
--- /dev/null
+++ b/Core/MdePkg/Library/DxeServicesTableLib/DxeServicesTableLib.uni