mirror of https://gitee.com/openkylin/linux.git
58 lines
1.5 KiB
ArmAsm
58 lines
1.5 KiB
ArmAsm
/*
|
|
* Copyright (c) 2013 Samsung Electronics Co., Ltd.
|
|
* http://www.samsung.com
|
|
*
|
|
* Exynos low-level resume code
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#include <linux/linkage.h>
|
|
|
|
#define CPU_MASK 0xff0ffff0
|
|
#define CPU_CORTEX_A9 0x410fc090
|
|
|
|
/*
|
|
* The following code is located into the .data section. This is to
|
|
* allow l2x0_regs_phys to be accessed with a relative load while we
|
|
* can't rely on any MMU translation. We could have put l2x0_regs_phys
|
|
* in the .text section as well, but some setups might insist on it to
|
|
* be truly read-only. (Reference from: arch/arm/kernel/sleep.S)
|
|
*/
|
|
.data
|
|
.align
|
|
|
|
/*
|
|
* sleep magic, to allow the bootloader to check for an valid
|
|
* image to resume to. Must be the first word before the
|
|
* exynos_cpu_resume entry.
|
|
*/
|
|
|
|
.word 0x2bedf00d
|
|
|
|
/*
|
|
* exynos_cpu_resume
|
|
*
|
|
* resume code entry for bootloader to call
|
|
*/
|
|
|
|
ENTRY(exynos_cpu_resume)
|
|
#ifdef CONFIG_CACHE_L2X0
|
|
mrc p15, 0, r0, c0, c0, 0
|
|
ldr r1, =CPU_MASK
|
|
and r0, r0, r1
|
|
ldr r1, =CPU_CORTEX_A9
|
|
cmp r0, r1
|
|
bleq l2c310_early_resume
|
|
#endif
|
|
b cpu_resume
|
|
ENDPROC(exynos_cpu_resume)
|