mirror of
https://github.com/torvalds/linux.git
synced 2024-11-01 01:31:44 +00:00
332349518f
Check if the sleep command returns due to a pending interrupt in the standby unit. If this happens, try and ack the IRQ before re-trying the resume. It is currently unclear whether the resume can be backed out of at this stage as this could cause a problem with level based interrupts. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
69 lines
1.8 KiB
ArmAsm
69 lines
1.8 KiB
ArmAsm
/* linux/arch/arm/mach-s3c2412/sleep.S
|
|
*
|
|
* Copyright (c) 2007 Simtec Electronics
|
|
* Ben Dooks <ben@simtec.co.uk>
|
|
*
|
|
* S3C2412 Power Manager low-level sleep support
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#include <linux/linkage.h>
|
|
#include <asm/assembler.h>
|
|
#include <asm/hardware.h>
|
|
#include <asm/arch/map.h>
|
|
|
|
#include <asm/arch/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
|
|
|
|
mov pc, r14
|