https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: 7c53f6b671f4aba70ff15e1b05148b10d58c2837 authored by Linus Torvalds on 10 January 2021, 22:34:50 UTC
Linux 5.11-rc3
Linux 5.11-rc3
Tip revision: 7c53f6b
sleep-s3c64xx.S
/* 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 */
#ifdef CONFIG_S3C_PM_DEBUG_LED_SMDK
#define S3C64XX_GPNCON (S3C64XX_GPN_BASE + 0x00)
#define S3C64XX_GPNDAT (S3C64XX_GPN_BASE + 0x04)
#define S3C64XX_GPN_CONMASK(__gpio) (0x3 << ((__gpio) * 2))
#define S3C64XX_GPN_OUTPUT(__gpio) (0x1 << ((__gpio) * 2))
/* Initialise the GPIO state if we are debugging via the SMDK LEDs,
* as the uboot version supplied resets these to inputs during the
* resume checks.
*/
ldr r3, =S3C64XX_PA_GPIO
ldr r0, [ r3, #S3C64XX_GPNCON ]
bic r0, r0, #(S3C64XX_GPN_CONMASK(12) | S3C64XX_GPN_CONMASK(13) | \
S3C64XX_GPN_CONMASK(14) | S3C64XX_GPN_CONMASK(15))
orr r0, r0, #(S3C64XX_GPN_OUTPUT(12) | S3C64XX_GPN_OUTPUT(13) | \
S3C64XX_GPN_OUTPUT(14) | S3C64XX_GPN_OUTPUT(15))
str r0, [ r3, #S3C64XX_GPNCON ]
ldr r0, [ r3, #S3C64XX_GPNDAT ]
bic r0, r0, #0xf << 12 @ GPN12..15
orr r0, r0, #1 << 15 @ GPN15
str r0, [ r3, #S3C64XX_GPNDAT ]
#endif
b cpu_resume