2 * Copyright (c) 2013 Samsung Electronics Co., Ltd.
3 * http://www.samsung.com
5 * Exynos low-level resume code
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.
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.
18 #include <linux/linkage.h>
21 #define CPU_MASK 0xff0ffff0
22 #define CPU_CORTEX_A9 0x410fc090
25 * The following code is located into the .data section. This is to
26 * allow l2x0_regs_phys to be accessed with a relative load while we
27 * can't rely on any MMU translation. We could have put l2x0_regs_phys
28 * in the .text section as well, but some setups might insist on it to
29 * be truly read-only. (Reference from: arch/arm/kernel/sleep.S)
35 * sleep magic, to allow the bootloader to check for an valid
36 * image to resume to. Must be the first word before the
37 * exynos_cpu_resume entry.
45 * resume code entry for bootloader to call
48 ENTRY(exynos_cpu_resume)
49 #ifdef CONFIG_CACHE_L2X0
50 mrc p15, 0, r0, c0, c0, 0
53 ldr r1, =CPU_CORTEX_A9
55 bleq l2c310_early_resume
58 ENDPROC(exynos_cpu_resume)
62 ENTRY(exynos_cpu_resume_ns)
63 mrc p15, 0, r0, c0, c0, 0
66 ldr r1, =CPU_CORTEX_A9
70 adr r0, cp15_save_power
72 adr r0, cp15_save_diag
74 mov r0, #SMC_CMD_C15RESUME
79 ENDPROC(exynos_cpu_resume_ns)
82 .long 0 @ cp15 diagnostic
83 .globl cp15_save_power
85 .long 0 @ cp15 power control