1 files changed, 44 insertions, 0 deletions
diff --git a/Core/MdePkg/Library/BaseCpuLib/Arm/CpuSleep.asm b/Core/MdePkg/Library/BaseCpuLib/Arm/CpuSleep.asm
new file mode 100644
index 0000000000..a51e2cd9dd
--- /dev/null
+++ b/Core/MdePkg/Library/BaseCpuLib/Arm/CpuSleep.asm
@@ -0,0 +1,44 @@
+;------------------------------------------------------------------------------ 
+;
+; CpuSleep() for ARMv7
+;
+; ARMv6 versions was:
+;    MOV r0,#0
+;    MCR p15,0,r0,c7,c0,4   ;Wait for Interrupt instruction
+;
+; But this is a no-op on ARMv7
+;
+; Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
+; Portions copyright (c) 2008 - 2011, Apple Inc. All rights reserved.<BR>
+; This program and the accompanying materials
+; are licensed and made available under the terms and conditions of the BSD License
+; which accompanies this distribution.  The full text of the license may be found at
+; http://opensource.org/licenses/bsd-license.php.
+;
+; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+;
+;------------------------------------------------------------------------------
+
+  EXPORT CpuSleep
+  AREA cpu_sleep, CODE, READONLY
+
+;/**
+;  Places the CPU in a sleep state until an interrupt is received.
+;
+;  Places the CPU in a sleep state until an interrupt is received. If interrupts
+;  are disabled prior to calling this function, then the CPU will be placed in a
+;  sleep state indefinitely.
+;
+;**/
+;VOID
+;EFIAPI
+;CpuSleep (
+;  VOID
+;  );
+;
+CpuSleep
+    WFI
+    BX LR
+
+  END