MdePkg/BaseLib: Support IA32 processors without CLFLUSH

[mirror_edk2.git] / MdePkg / Library / BaseLib / Ia32 / ReadDr2.c

diff --git a/MdePkg/Library/BaseLib/Ia32/ReadDr2.c b/MdePkg/Library/BaseLib/Ia32/ReadDr2.c
index 30f8da6911c9c29a7f604ad6486f76e98d14e72c..4ea6586d27b53005c10d4e3808b7b7bcc8441b0d 100644 (file)
--- a/MdePkg/Library/BaseLib/Ia32/ReadDr2.c
+++ b/MdePkg/Library/BaseLib/Ia32/ReadDr2.c
@@ -1,22 +1,30 @@
 /** @file\r
   AsmReadDr2 function\r
 \r
-  Copyright (c) 2006 - 2007, Intel Corporation<BR>\r
-  All rights reserved. This program and the accompanying materials\r
+  Copyright (c) 2006 - 2008, Intel Corporation. All rights reserved.<BR>\r
+  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
+  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
 **/\r
 \r
-//\r
-// Include common header file for this module.\r
-//\r
-#include "CommonHeader.h"\r
 \r
+\r
+\r
+/**\r
+  Reads the current value of Debug Register 2 (DR2).\r
+\r
+  Reads and returns the current value of DR2. This function is only available\r
+  on IA-32 and x64. This returns a 32-bit value on IA-32 and a 64-bit value on\r
+  x64.\r
+\r
+  @return The value of Debug Register 2 (DR2).\r
+\r
+**/\r
 UINTN\r
 EFIAPI\r
 AsmReadDr2 (\r