Fix the bug in x64 thunk code that it cannot handle the case when GDT is loaded in...

[mirror_edk2.git] / MdePkg / Library / BaseLib / Ia32 / WriteCr4.c

diff --git a/MdePkg/Library/BaseLib/Ia32/WriteCr4.c b/MdePkg/Library/BaseLib/Ia32/WriteCr4.c
index dcd557712e3918282ce31a2c3f55132b588eb9ed..85212dd627f7a2ec6e4daf934da4000977df7982 100644 (file)
--- a/MdePkg/Library/BaseLib/Ia32/WriteCr4.c
+++ b/MdePkg/Library/BaseLib/Ia32/WriteCr4.c
@@ -1,7 +1,7 @@
 /** @file\r
   AsmWriteCr4 function\r
 \r
-  Copyright (c) 2006 - 2007, Intel Corporation<BR>\r
+  Copyright (c) 2006 - 2008, 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
@@ -12,11 +12,17 @@
 \r
 **/\r
 \r
-//\r
-// Include common header file for this module.\r
-//\r
-#include "CommonHeader.h"\r
+/**\r
+  Writes a value to Control Register 4 (CR4).\r
 \r
+  Writes and returns a new value to CR4. This function is only available on\r
+  IA-32 and x64. This writes a 32-bit value on IA-32 and a 64-bit value on x64.\r
+\r
+  @param  Value The value to write to CR4.\r
+\r
+  @return The value written to CR4.\r
+\r
+**/\r
 UINTN\r
 EFIAPI\r
 AsmWriteCr4 (\r