Add Add ARM support

[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
new file mode 100644 (file)
index 0000000..e0aaf21
--- /dev/null
+++ b/MdePkg/Library/BaseCpuLib/Arm/CpuSleep.asm
@@ -0,0 +1,39 @@
+;------------------------------------------------------------------------------ \r
+;\r
+; CpuSleep() for ARM\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
+; 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
+;\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
+;\r
+;------------------------------------------------------------------------------\r
+\r
+  EXPORT CpuSleep\r
+  AREA cpu_sleep, CODE, READONLY\r
+\r
+;/**\r
+;  Places the CPU in a sleep state until an interrupt is received.\r
+;\r
+;  Places the CPU in a sleep state until an interrupt is received. If interrupts\r
+;  are disabled prior to calling this function, then the CPU will be placed in a\r
+;  sleep state indefinitely.\r
+;\r
+;**/\r
+;VOID\r
+;EFIAPI\r
+;CpuSleep (\r
+;  VOID\r
+;  );\r
+;\r
+CpuSleep\r
+    MOV r0,#0\r
+    MCR p15,0,r0,c7,c0,4   ;Wait for Interrupt instruction\r
+    BX LR\r
+\r
+  END\r