1/* linux/arch/arm/plat-s5p/sleep.S
2 *
3 * Copyright (c) 2010 Samsung Electronics Co., Ltd.
4 *		http://www.samsung.com
5 *
6 * S5PV210 power Manager (Suspend-To-RAM) support
7 * Based on S3C2410 sleep code by:
8 * 	Ben Dooks, (c) 2004 Simtec Electronics
9 *
10 * Based on PXA/SA1100 sleep code by:
11 *	Nicolas Pitre, (c) 2002 Monta Vista Software Inc
12 *	Cliff Brake, (c) 2001
13 *
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License as published by
16 * the Free Software Foundation; either version 2 of the License, or
17 * (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public License
25 * along with this program; if not, write to the Free Software
26 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
27*/
28
29#include <linux/linkage.h>
30#include <asm/assembler.h>
31#include <asm/memory.h>
32
33	.text
34
35	/* s3c_cpu_save
36	 *
37	 * entry:
38	 *	r1 = v:p offset
39	*/
40
41ENTRY(s3c_cpu_save)
42
43	stmfd	sp!, { r3 - r12, lr }
44	ldr	r3, =resume_with_mmu
45	bl	cpu_suspend
46
47	ldr	r0, =pm_cpu_sleep
48	ldr	r0, [ r0 ]
49	mov	pc, r0
50
51resume_with_mmu:
52	ldmfd	sp!, { r3 - r12, pc }
53
54	.ltorg
55
56	/* sleep magic, to allow the bootloader to check for an valid
57	 * image to resume to. Must be the first word before the
58	 * s3c_cpu_resume entry.
59	*/
60
61	.word	0x2bedf00d
62
63	/* s3c_cpu_resume
64	 *
65	 * resume code entry for bootloader to call
66	 *
67	 * we must put this code here in the data segment as we have no
68	 * other way of restoring the stack pointer after sleep, and we
69	 * must not write to the code segment (code is read-only)
70	*/
71
72ENTRY(s3c_cpu_resume)
73	b	cpu_resume
74