projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| d710aa31 TF |
1 | /* |
| 2 | * Copyright (c) 2013 Samsung Electronics Co., Ltd. | |
| 3 | * http://www.samsung.com | |
| 4 | * | |
| 5 | * Exynos low-level resume code | |
| 6 | * | |
| 7 | * This program is free software; you can redistribute it and/or modify | |
| 8 | * it under the terms of the GNU General Public License as published by | |
| 9 | * the Free Software Foundation; either version 2 of the License, or | |
| 10 | * (at your option) any later version. | |
| 11 | * | |
| 12 | * This program is distributed in the hope that it will be useful, | |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 15 | * GNU General Public License for more details. | |
| 16 | */ | |
| 17 | ||
| 18 | #include <linux/linkage.h> | |
| d710aa31 TF |
19 | |
| 20 | #define CPU_MASK 0xff0ffff0 | |
| 21 | #define CPU_CORTEX_A9 0x410fc090 | |
| 22 | ||
| 23 | /* | |
| 24 | * The following code is located into the .data section. This is to | |
| 25 | * allow l2x0_regs_phys to be accessed with a relative load while we | |
| 26 | * can't rely on any MMU translation. We could have put l2x0_regs_phys | |
| 27 | * in the .text section as well, but some setups might insist on it to | |
| 28 | * be truly read-only. (Reference from: arch/arm/kernel/sleep.S) | |
| 29 | */ | |
| 30 | .data | |
| 31 | .align | |
| 32 | ||
| 33 | /* | |
| 34 | * sleep magic, to allow the bootloader to check for an valid | |
| 35 | * image to resume to. Must be the first word before the | |
| 36 | * exynos_cpu_resume entry. | |
| 37 | */ | |
| 38 | ||
| 39 | .word 0x2bedf00d | |
| 40 | ||
| 41 | /* | |
| 42 | * exynos_cpu_resume | |
| 43 | * | |
| 44 | * resume code entry for bootloader to call | |
| 45 | */ | |
| 46 | ||
| 47 | ENTRY(exynos_cpu_resume) | |
| 48 | #ifdef CONFIG_CACHE_L2X0 | |
| 49 | mrc p15, 0, r0, c0, c0, 0 | |
| 50 | ldr r1, =CPU_MASK | |
| 51 | and r0, r0, r1 | |
| 52 | ldr r1, =CPU_CORTEX_A9 | |
| 53 | cmp r0, r1 | |
| 25a9ef63 | 54 | bleq l2c310_early_resume |
| d710aa31 TF |
55 | #endif |
| 56 | b cpu_resume | |
| 57 | ENDPROC(exynos_cpu_resume) |