MdePkg: Replace BSD License with BSD+Patent License

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

diff --git a/MdePkg/Library/BaseCpuLib/Arm/CpuSleep.S b/MdePkg/Library/BaseCpuLib/Arm/CpuSleep.S
index cf20b0876252d7365ee969dc0536ae89138abe7a..e2b7349008b076fd8e9c9745a31a8d4a4aa1da04 100644 (file)
--- a/MdePkg/Library/BaseCpuLib/Arm/CpuSleep.S
+++ b/MdePkg/Library/BaseCpuLib/Arm/CpuSleep.S
@@ -1,22 +1,22 @@
-#------------------------------------------------------------------------------ \r
+#------------------------------------------------------------------------------\r
 #\r
-# CpuSleep() for ARM\r
+# CpuSleep() for ARMv7\r
 #\r
-# Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>\r
-# Portions copyright (c) 2008 - 2009, 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
+# ARMv6 versions was:\r
+#    MOV r0,#0\r
+#    MCR p15,0,r0,c7,c0,4   ;Wait for Interrupt instruction\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
+# But this is a no-op on ARMv7\r
+#\r
+# Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r
+# Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>\r
+# SPDX-License-Identifier: BSD-2-Clause-Patent\r
 #\r
 #------------------------------------------------------------------------------\r
 \r
 .text\r
 .p2align 2\r
-.globl ASM_PFX(CpuSleep)\r
+GCC_ASM_EXPORT(CpuSleep)\r
 \r
 #/**\r
 #  Places the CPU in a sleep state until an interrupt is received.\r
@@ -33,6 +33,5 @@
 #  );\r
 #\r
 ASM_PFX(CpuSleep):\r
-    mov r0,#0\r
-    mcr p15,0,r0,c7,c0,4   // Wait for Interrupt instruction\r
+    wfi\r
     bx  lr\r