diff options
Diffstat (limited to 'MdePkg/Library/BaseCpuLib/Arm/CpuSleep.S')
| -rw-r--r-- | MdePkg/Library/BaseCpuLib/Arm/CpuSleep.S | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/MdePkg/Library/BaseCpuLib/Arm/CpuSleep.S b/MdePkg/Library/BaseCpuLib/Arm/CpuSleep.S new file mode 100644 index 0000000000000..b84c80862350d --- /dev/null +++ b/MdePkg/Library/BaseCpuLib/Arm/CpuSleep.S @@ -0,0 +1,43 @@ +#------------------------------------------------------------------------------ +# +# 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 - 2009, 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. +# +#------------------------------------------------------------------------------ + +.text +.p2align 2 +GCC_ASM_EXPORT(CpuSleep) + +#/** +# 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 +# ); +# +ASM_PFX(CpuSleep): + wfi + bx lr |