Set correct DS/ES/FS/GS/SS segment selectors after GDT loaded.

Signed-off-by: Jeff Fan <jeff.fan@intel.com>
Reviewed-by: Rui Sun <rui.sun@intel.com>



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13667 6f19259b-4bc3-4df7-8a09-765794883524

UefiCpuPkg/Universal/Acpi/S3Resume2Pei/X64/AsmFuncs.S

@@ -0,0 +1,37 @@
+#------------------------------------------------------------------------------
+#*
+#*   Copyright (c) 2012, 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.
+#*
+#*    AsmFuncs.S
+#*
+#*   Abstract:
+#*
+#*     Assembly function to set segment selectors.
+#
+#------------------------------------------------------------------------------
+
+.text
+
+#------------------------------------------------------------------------------
+# 
+# VOID
+# EFIAPI
+# AsmSetDataSelectors (
+#   IN UINT16   SelectorValue
+#   );
+#------------------------------------------------------------------------------
+ASM_GLOBAL ASM_PFX(AsmSetDataSelectors)
+ASM_PFX(AsmSetDataSelectors):
+    movw    %cx, %ss
+    movw    %cx, %ds
+    movw    %cx, %es
+    movw    %cx, %fs
+    movw    %cx, %gs 
+    ret