MdePkg/BaseCacheMaintenanceLib: Support IA32 processors without CLFLUSH

[mirror_edk2.git] / MdePkg / Library / BaseLib / Ia32 / WriteDr1.c

diff --git a/MdePkg/Library/BaseLib/Ia32/WriteDr1.c b/MdePkg/Library/BaseLib/Ia32/WriteDr1.c
index 74f4877ac0b133f750b876849b8f784eddccdeb7..bdb0b7095eb773cfdeed6fbf7c2837258d83f634 100644 (file)
--- a/MdePkg/Library/BaseLib/Ia32/WriteDr1.c
+++ b/MdePkg/Library/BaseLib/Ia32/WriteDr1.c
@@ -1,19 +1,28 @@
 /** @file\r
   AsmWriteDr1 function\r
 \r
-  Copyright (c) 2006, 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
-#if _MSC_EXTENSIONS\r
+/**\r
+  Writes a value to Debug Register 1 (DR1).\r
 \r
+  Writes and returns a new value to DR1. 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 Dr1.\r
+\r
+  @return The value written to Debug Register 1 (DR1).\r
+\r
+**/\r
 UINTN\r
 EFIAPI\r
 AsmWriteDr1 (\r
@@ -26,4 +35,3 @@ AsmWriteDr1 (
   }\r
 }\r
 \r
-#endif\r