1/* SPDX-License-Identifier: GPL-2.0 */ 2/* linux/arch/arm/plat-s3c64xx/sleep.S 3 * 4 * Copyright 2008 Openmoko, Inc. 5 * Copyright 2008 Simtec Electronics 6 * Ben Dooks <ben@simtec.co.uk> 7 * http://armlinux.simtec.co.uk/ 8 * 9 * S3C64XX CPU sleep code 10 */ 11 12#include <linux/linkage.h> 13#include <asm/assembler.h> 14#include "map.h" 15 16#undef S3C64XX_VA_GPIO 17#define S3C64XX_VA_GPIO (0x0) 18 19#include "regs-gpio.h" 20 21#define LL_UART (S3C_PA_UART + (0x400 * CONFIG_S3C_LOWLEVEL_UART_PORT)) 22 23 .text 24 25 /* Sleep magic, the word before the resume entry point so that the 26 * bootloader can check for a resumeable image. */ 27 28 .word 0x2bedf00d 29 30 /* s3c_cpu_reusme 31 * 32 * This is the entry point, stored by whatever method the bootloader 33 * requires to get the kernel runnign again. This code expects to be 34 * entered with no caches live and the MMU disabled. It will then 35 * restore the MMU and other basic CP registers saved and restart 36 * the kernel C code to finish the resume code. 37 */ 38 39ENTRY(s3c_cpu_resume) 40 msr cpsr_c, #PSR_I_BIT | PSR_F_BIT | SVC_MODE 41 ldr r2, =LL_UART /* for debug */ 42 b cpu_resume 43