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

#------------------------------------------------------------------------------\r
#\r
# CpuSleep() for ARMv7\r
#\r
# ARMv6 versions was:\r
#    MOV r0,#0\r
#    MCR p15,0,r0,c7,c0,4   ;Wait for Interrupt instruction\r
#\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
GCC_ASM_EXPORT(CpuSleep)\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
ASM_PFX(CpuSleep):\r
    wfi\r
    bx  lr\r
Commit	Line	Data
	1	#------------------------------------------------------------------------------\r
	2	#\r
	3	# CpuSleep() for ARMv7\r
	4	#\r
	5	# ARMv6 versions was:\r
	6	# MOV r0,#0\r
	7	# MCR p15,0,r0,c7,c0,4 ;Wait for Interrupt instruction\r
	8	#\r
	9	# But this is a no-op on ARMv7\r
	10	#\r
	11	# Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r
	12	# Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>\r
	13	# SPDX-License-Identifier: BSD-2-Clause-Patent\r
	14	#\r
	15	#------------------------------------------------------------------------------\r
	16	\r
	17	.text\r
	18	.p2align 2\r
	19	GCC_ASM_EXPORT(CpuSleep)\r
	20	\r
	21	#/**\r
	22	# Places the CPU in a sleep state until an interrupt is received.\r
	23	#\r
	24	# Places the CPU in a sleep state until an interrupt is received. If interrupts\r
	25	# are disabled prior to calling this function, then the CPU will be placed in a\r
	26	# sleep state indefinitely.\r
	27	#\r
	28	#**/\r
	29	#VOID\r
	30	#EFIAPI\r
	31	#CpuSleep (\r
	32	# VOID\r
	33	# );\r
	34	#\r
	35	ASM_PFX(CpuSleep):\r
	36	wfi\r
	37	bx lr\r