77 lines
1.9 KiB
ArmAsm
77 lines
1.9 KiB
ArmAsm
|
/* linux/arch/arm/mach-exynos4/sleep.S
|
||
|
|
*
|
||
|
|
* Copyright (c) 2011 Samsung Electronics Co., Ltd.
|
||
|
|
* http://www.samsung.com
|
||
|
|
*
|
||
|
|
* EXYNOS4210 power Manager (Suspend-To-RAM) support
|
||
|
|
* Based on S3C2410 sleep code by:
|
||
|
|
* Ben Dooks, (c) 2004 Simtec Electronics
|
||
|
|
*
|
||
|
|
* Based on PXA/SA1100 sleep code by:
|
||
|
|
* Nicolas Pitre, (c) 2002 Monta Vista Software Inc
|
||
|
|
* Cliff Brake, (c) 2001
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU General Public License as published by
|
||
|
|
* the Free Software Foundation; either version 2 of the License, or
|
||
|
|
* (at your option) any later version.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope that it will be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
* GNU General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License
|
||
|
|
* along with this program; if not, write to the Free Software
|
||
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/linkage.h>
|
||
|
|
#include <asm/assembler.h>
|
||
|
|
#include <asm/memory.h>
|
||
|
|
|
||
|
|
.text
|
||
|
|
|
||
|
|
/*
|
||
|
|
* s3c_cpu_save
|
||
|
|
*
|
||
|
|
* entry:
|
||
|
|
* r1 = v:p offset
|
||
|
|
*/
|
||
|
|
|
||
|
|
ENTRY(s3c_cpu_save)
|
||
|
|
|
||
|
|
stmfd sp!, { r3 - r12, lr }
|
||
|
|
ldr r3, =resume_with_mmu
|
||
|
|
bl cpu_suspend
|
||
|
|
|
||
|
|
ldr r0, =pm_cpu_sleep
|
||
|
|
ldr r0, [ r0 ]
|
||
|
|
mov pc, r0
|
||
|
|
|
||
|
|
resume_with_mmu:
|
||
|
|
ldmfd sp!, { r3 - r12, pc }
|
||
|
|
|
||
|
|
.ltorg
|
||
|
|
|
||
|
|
/*
|
||
|
|
* sleep magic, to allow the bootloader to check for an valid
|
||
|
|
* image to resume to. Must be the first word before the
|
||
|
|
* s3c_cpu_resume entry.
|
||
|
|
*/
|
||
|
|
|
||
|
|
.word 0x2bedf00d
|
||
|
|
|
||
|
|
/*
|
||
|
|
* s3c_cpu_resume
|
||
|
|
*
|
||
|
|
* resume code entry for bootloader to call
|
||
|
|
*
|
||
|
|
* we must put this code here in the data segment as we have no
|
||
|
|
* other way of restoring the stack pointer after sleep, and we
|
||
|
|
* must not write to the code segment (code is read-only)
|
||
|
|
*/
|
||
|
|
|
||
|
|
ENTRY(s3c_cpu_resume)
|
||
|
|
b cpu_resume
|