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 638bf8f7aeb4e9bf55245d1c8b7244cda55cfe60..4ea6586d27b53005c10d4e3808b7b7bcc8441b0d 100644 (file)
--- a/MdePkg/Library/BaseLib/Ia32/ReadDr2.c
+++ b/MdePkg/Library/BaseLib/Ia32/ReadDr2.c
@@ -1,17 +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
+\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