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/* SPDX-License-Identifier: GPL-2.0+ */
* Copyright (c) 2007 Simtec Electronics
* Ben Dooks <>
* S3C2412 Power Manager low-level sleep support
#include <linux/linkage.h>
#include <asm/assembler.h>
#include "map.h"
#include "regs-irq.h"
.global s3c2412_sleep_enter
mov r0, #0 /* argument for coprocessors */
ldr r1, =S3C2410_INTPND
ldr r2, =S3C2410_SRCPND
ldr r3, =S3C2410_EINTPEND
teq r0, r0
bl s3c2412_sleep_enter1
teq pc, r0
bl s3c2412_sleep_enter1
.align 5
/* this is called twice, first with the Z flag to ensure that the
* instructions have been loaded into the cache, and the second
* time to try and suspend the system.
mcr p15, 0, r0, c7, c10, 4
mcrne p15, 0, r0, c7, c0, 4
/* if we return from here, it is because an interrupt was
* active when we tried to shutdown. Try and ack the IRQ and
* retry, as simply returning causes the system to lock.
ldrne r9, [r1]
strne r9, [r1]
ldrne r9, [r2]
strne r9, [r2]
ldrne r9, [r3]
strne r9, [r3]
bne s3c2412_sleep_enter1
ret lr