linux/arch/arm/mach-s3c/sleep-s3c64xx.S
Arnd Bergmann 0d297df038 ARM: s3c: simplify platform code
Following down the now unused symbols and header files, some additional
content can be dropped that is used by neither the s3c64xx DT support
nor the crag6410 board.

Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2023-01-16 09:26:05 +01:00

43 lines
1.1 KiB
ArmAsm

/* SPDX-License-Identifier: GPL-2.0 */
/* linux/arch/arm/plat-s3c64xx/sleep.S
*
* Copyright 2008 Openmoko, Inc.
* Copyright 2008 Simtec Electronics
* Ben Dooks <ben@simtec.co.uk>
* http://armlinux.simtec.co.uk/
*
* S3C64XX CPU sleep code
*/
#include <linux/linkage.h>
#include <asm/assembler.h>
#include "map.h"
#undef S3C64XX_VA_GPIO
#define S3C64XX_VA_GPIO (0x0)
#include "regs-gpio.h"
#define LL_UART (S3C_PA_UART + (0x400 * CONFIG_S3C_LOWLEVEL_UART_PORT))
.text
/* Sleep magic, the word before the resume entry point so that the
* bootloader can check for a resumeable image. */
.word 0x2bedf00d
/* s3c_cpu_reusme
*
* This is the entry point, stored by whatever method the bootloader
* requires to get the kernel runnign again. This code expects to be
* entered with no caches live and the MMU disabled. It will then
* restore the MMU and other basic CP registers saved and restart
* the kernel C code to finish the resume code.
*/
ENTRY(s3c_cpu_resume)
msr cpsr_c, #PSR_I_BIT | PSR_F_BIT | SVC_MODE
ldr r2, =LL_UART /* for debug */
b cpu_resume