55 lines
1.1 KiB
ArmAsm
55 lines
1.1 KiB
ArmAsm
|
/* SPDX-License-Identifier: GPL-2.0+ */
|
||
|
|
/*
|
||
|
|
* Copyright (c) 2007 Simtec Electronics
|
||
|
|
* Ben Dooks <ben@simtec.co.uk>
|
||
|
|
*
|
||
|
|
* S3C2412 Power Manager low-level sleep support
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <linux/linkage.h>
|
||
|
|
#include <asm/assembler.h>
|
||
|
|
#include <mach/hardware.h>
|
||
|
|
#include <mach/map.h>
|
||
|
|
|
||
|
|
#include <mach/regs-irq.h>
|
||
|
|
|
||
|
|
.text
|
||
|
|
|
||
|
|
.global s3c2412_sleep_enter
|
||
|
|
|
||
|
|
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.
|
||
|
|
*/
|
||
|
|
s3c2412_sleep_enter1:
|
||
|
|
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
|