1 files changed, 38 insertions, 0 deletions
diff --git a/roms/edk2/MdePkg/Library/BaseCpuLib/Arm/CpuSleep.asm b/roms/edk2/MdePkg/Library/BaseCpuLib/Arm/CpuSleep.asm
new file mode 100644
index 000000000..ae32705a6
--- /dev/null
+++ b/roms/edk2/MdePkg/Library/BaseCpuLib/Arm/CpuSleep.asm
@@ -0,0 +1,38 @@
+;------------------------------------------------------------------------------
+;
+; 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 - 2018, Intel Corporation. All rights reserved.<BR>
+; Portions copyright (c) 2008 - 2011, Apple Inc. All rights reserved.<BR>
+; SPDX-License-Identifier: BSD-2-Clause-Patent
+;
+;------------------------------------------------------------------------------
+
+  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