| Jaecheol Lee | 1663895 | 2011-03-10 13:33:59 +0900 | [diff] [blame] | 1 | /* linux/arch/arm/mach-exynos4/sleep.S |
| 2 | * |
| 3 | * Copyright (c) 2011 Samsung Electronics Co., Ltd. |
| 4 | * http://www.samsung.com |
| 5 | * |
| 6 | * EXYNOS4210 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 | /* |
| 36 | * s3c_cpu_save |
| 37 | * |
| 38 | * entry: |
| 39 | * r1 = v:p offset |
| 40 | */ |
| 41 | |
| 42 | ENTRY(s3c_cpu_save) |
| 43 | |
| 44 | stmfd sp!, { r3 - r12, lr } |
| 45 | ldr r3, =resume_with_mmu |
| 46 | bl cpu_suspend |
| 47 | |
| 48 | ldr r0, =pm_cpu_sleep |
| 49 | ldr r0, [ r0 ] |
| 50 | mov pc, r0 |
| 51 | |
| 52 | resume_with_mmu: |
| 53 | ldmfd sp!, { r3 - r12, pc } |
| 54 | |
| 55 | .ltorg |
| 56 | |
| 57 | /* |
| 58 | * sleep magic, to allow the bootloader to check for an valid |
| 59 | * image to resume to. Must be the first word before the |
| 60 | * s3c_cpu_resume entry. |
| 61 | */ |
| 62 | |
| 63 | .word 0x2bedf00d |
| 64 | |
| 65 | /* |
| 66 | * s3c_cpu_resume |
| 67 | * |
| 68 | * resume code entry for bootloader to call |
| 69 | * |
| 70 | * we must put this code here in the data segment as we have no |
| 71 | * other way of restoring the stack pointer after sleep, and we |
| 72 | * must not write to the code segment (code is read-only) |
| 73 | */ |
| 74 | |
| 75 | ENTRY(s3c_cpu_resume) |
| 76 | b cpu_resume |