MdePkg/BaseLib: Support IA32 processors without CLFLUSH

[mirror_edk2.git] / MdePkg / Library / BaseLib / Ia32 / ReadCr0.c

diff --git a/MdePkg/Library/BaseLib/Ia32/ReadCr0.c b/MdePkg/Library/BaseLib/Ia32/ReadCr0.c
index 4931775bef8168d26d170c3f6de0805f90bf0629..ddd548320a2f74d106d65e13ddf1276c832d670c 100644 (file)
--- a/MdePkg/Library/BaseLib/Ia32/ReadCr0.c
+++ b/MdePkg/Library/BaseLib/Ia32/ReadCr0.c
@@ -1,19 +1,30 @@
 /** @file\r
   AsmReadCr0 function\r
 \r
-  Copyright (c) 2006, Intel Corporation<BR>\r
-  All rights reserved. This program and the accompanying materials\r
+  Copyright (c) 2006 - 2014, 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
+\r
+\r
+/**\r
+  Reads the current value of the Control Register 0 (CR0).\r
+\r
+  Reads and returns the current value of CR0. 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 the Control Register 0 (CR0).\r
+\r
+**/\r
 UINTN\r
 EFIAPI\r
 AsmReadCr0 (\r
@@ -24,5 +35,3 @@ AsmReadCr0 (
     mov     eax, cr0\r
   }\r
 }\r
-\r
-#endif\r