Import some Pei and Dxe related instances for MdePkg.

[mirror_edk2.git] / MdePkg / Library / UefiRuntimeServicesTableLib / UefiRuntimeServicesTableLib.c

diff --git a/MdePkg/Library/UefiRuntimeServicesTableLib/UefiRuntimeServicesTableLib.c b/MdePkg/Library/UefiRuntimeServicesTableLib/UefiRuntimeServicesTableLib.c
new file mode 100644 (file)
index 0000000..7fb7773
--- /dev/null
+++ b/MdePkg/Library/UefiRuntimeServicesTableLib/UefiRuntimeServicesTableLib.c
@@ -0,0 +1,50 @@
+/** @file\r
+  UEFI Runtime Services Table Library.\r
+\r
+  Copyright (c) 2006, Intel Corporation<BR>\r
+  All rights reserved. This program and the accompanying materials\r
+  are licensed and made available under the terms and conditions of the BSD License\r
+  which accompanies this distribution.  The full text of the license may be found at\r
+  http://opensource.org/licenses/bsd-license.php\r
+\r
+  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
+  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
+\r
+  Module Name:  UefiRuntimeServicesTableLib.c\r
+\r
+**/\r
+\r
+//\r
+// Include common header file for this module.\r
+//\r
+#include "CommonHeader.h"\r
+\r
+EFI_RUNTIME_SERVICES  *gRT = NULL;\r
+\r
+/**\r
+  The constructor function caches the pointer of Runtime Services Table.\r
+\r
+  The constructor function caches the pointer of Runtime Services Table.\r
+  It will ASSERT() if the pointer of Runtime Services Table is NULL.\r
+  It will always return EFI_SUCCESS.\r
+\r
+  @param  ImageHandle   The firmware allocated handle for the EFI image.\r
+  @param  SystemTable   A pointer to the EFI System Table.\r
+\r
+  @retval EFI_SUCCESS   The constructor always returns EFI_SUCCESS.\r
+\r
+**/\r
+EFI_STATUS\r
+EFIAPI\r
+UefiRuntimeServicesTableLibConstructor (\r
+  IN EFI_HANDLE        ImageHandle,\r
+  IN EFI_SYSTEM_TABLE  *SystemTable\r
+  )\r
+{\r
+  //\r
+  // Cache pointer to the EFI Runtime Services Table\r
+  //\r
+  gRT = SystemTable->RuntimeServices;\r
+  ASSERT (gRT != NULL);\r
+  return EFI_SUCCESS;\r
+}\r