MdePkg: Clean up source files

[mirror_edk2.git] / MdePkg / Library / BaseCpuLib / Arm / CpuSleep.asm

diff --git a/MdePkg/Library/BaseCpuLib/Arm/CpuSleep.asm b/MdePkg/Library/BaseCpuLib/Arm/CpuSleep.asm
index e0aaf2166330ae9e99b1f5b03689edda3e2a4307..2d6090c07d104d374ec13a3be135f4a8cba3507b 100644 (file)
--- a/MdePkg/Library/BaseCpuLib/Arm/CpuSleep.asm
+++ b/MdePkg/Library/BaseCpuLib/Arm/CpuSleep.asm
@@ -1,13 +1,19 @@
-;------------------------------------------------------------------------------ \r
+;------------------------------------------------------------------------------\r
+;\r
+; CpuSleep() for ARMv7\r
+;\r
+; ARMv6 versions was:\r
+;    MOV r0,#0\r
+;    MCR p15,0,r0,c7,c0,4   ;Wait for Interrupt instruction\r
 ;\r
-; CpuSleep() for ARM\r
+; But this is a no-op on ARMv7\r
 ;\r
-; Copyright (c) 2006 - 2009, Intel Corporation<BR>\r
-; Portions copyright (c) 2008-2009 Apple Inc.<BR>\r
-; All rights reserved. This program and the accompanying materials\r
+; Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r
+; Portions copyright (c) 2008 - 2011, Apple Inc. 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
@@ -32,8 +38,7 @@
 ;  );\r
 ;\r
 CpuSleep\r
-    MOV r0,#0\r
-    MCR p15,0,r0,c7,c0,4   ;Wait for Interrupt instruction\r
+    WFI\r
     BX LR\r
 \r
   END\r