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