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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/arm/mach-exynos4/sleep.S
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/* linux/arch/arm/mach-exynos4/sleep.S

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 *

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 * Copyright (c) 2011 Samsung Electronics Co., Ltd.

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 *		http://www.samsung.com

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 *

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 * EXYNOS4210 power Manager (Suspend-To-RAM) support

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 * Based on S3C2410 sleep code by:

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 *	Ben Dooks, (c) 2004 Simtec Electronics

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 *

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 * Based on PXA/SA1100 sleep code by:

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 *	Nicolas Pitre, (c) 2002 Monta Vista Software Inc

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 *	Cliff Brake, (c) 2001

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 *

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 * This program is free software; you can redistribute it and/or modify

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 * it under the terms of the GNU General Public License as published by

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 * the Free Software Foundation; either version 2 of the License, or

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 * (at your option) any later version.

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 *

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 * This program is distributed in the hope that it will be useful,

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 * but WITHOUT ANY WARRANTY; without even the implied warranty of

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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

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 * GNU General Public License for more details.

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 *

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 * You should have received a copy of the GNU General Public License

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 * along with this program; if not, write to the Free Software

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 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

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*/

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#include <linux/linkage.h>

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#include <asm/assembler.h>

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#include <asm/memory.h>

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	.text

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	/*

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	 * s3c_cpu_save

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	 *

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	 * entry:

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	 *	r1 = v:p offset

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	 */

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ENTRY(s3c_cpu_save)

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	stmfd	sp!, { r3 - r12, lr }

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	ldr	r3, =resume_with_mmu

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	bl	cpu_suspend

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	ldr	r0, =pm_cpu_sleep

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	ldr	r0, [ r0 ]

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	mov	pc, r0

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resume_with_mmu:

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	ldmfd	sp!, { r3 - r12, pc }

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	.ltorg

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	/*

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	 * sleep magic, to allow the bootloader to check for an valid

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	 * image to resume to. Must be the first word before the

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	 * s3c_cpu_resume entry.

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	 */

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	.word	0x2bedf00d

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	/*

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	 * s3c_cpu_resume

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	 *

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	 * resume code entry for bootloader to call

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	 *

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	 * we must put this code here in the data segment as we have no

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	 * other way of restoring the stack pointer after sleep, and we

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	 * must not write to the code segment (code is read-only)

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	 */

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ENTRY(s3c_cpu_resume)

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	b	cpu_resume

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