Fix bug in AsmCpuVirtual() to return 1 instead of 0 when CPU is in virtual mode.

[mirror_edk2.git] / MdePkg / Library / BaseLib / Ia32 / ReadCr4.c

diff --git a/MdePkg/Library/BaseLib/Ia32/ReadCr4.c b/MdePkg/Library/BaseLib/Ia32/ReadCr4.c
index 71ffa9b72dd8422733766c0e1c72213a07b967fb..bfbbe644fcb07bb83452b3b6538a7e45f0e4d7a7 100644 (file)
--- a/MdePkg/Library/BaseLib/Ia32/ReadCr4.c
+++ b/MdePkg/Library/BaseLib/Ia32/ReadCr4.c
@@ -1,8 +1,8 @@
 /** @file\r
   AsmReadCr4 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
@@ -12,11 +12,19 @@
 \r
 **/\r
 \r
-//\r
-// Include common header file for this module.\r
-//\r
 \r
 \r
+\r
+/**\r
+  Reads the current value of the Control Register 4 (CR4).\r
+\r
+  Reads and returns the current value of CR4. 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 4 (CR4).\r
+\r
+**/\r
 UINTN\r
 EFIAPI\r
 AsmReadCr4 (\r