1332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks/* linux/arch/arm/mach-s3c2412/sleep.S 2332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks * 3332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks * Copyright (c) 2007 Simtec Electronics 4332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks * Ben Dooks <ben@simtec.co.uk> 5332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks * 6332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks * S3C2412 Power Manager low-level sleep support 7332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks * 8332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks * This program is free software; you can redistribute it and/or modify 9332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks * it under the terms of the GNU General Public License as published by 10332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks * the Free Software Foundation; either version 2 of the License, or 11332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks * (at your option) any later version. 12332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks * 13332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks * This program is distributed in the hope that it will be useful, 14332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks * but WITHOUT ANY WARRANTY; without even the implied warranty of 15332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks * GNU General Public License for more details. 17332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks * 18332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks * You should have received a copy of the GNU General Public License 19332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks * along with this program; if not, write to the Free Software 20332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks*/ 22332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks 23332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks#include <linux/linkage.h> 24332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks#include <asm/assembler.h> 25a09e64fbc0094e3073dbb09c3b4bfe4ab669244bRussell King#include <mach/hardware.h> 26a09e64fbc0094e3073dbb09c3b4bfe4ab669244bRussell King#include <mach/map.h> 27332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks 28a09e64fbc0094e3073dbb09c3b4bfe4ab669244bRussell King#include <mach/regs-irq.h> 29332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks 30332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks .text 31332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks 32332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks .global s3c2412_sleep_enter 33332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks 34332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dookss3c2412_sleep_enter: 35332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks mov r0, #0 /* argument for coprocessors */ 36332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks ldr r1, =S3C2410_INTPND 37332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks ldr r2, =S3C2410_SRCPND 38332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks ldr r3, =S3C2410_EINTPEND 39332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks 40332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks teq r0, r0 41332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks bl s3c2412_sleep_enter1 42332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks teq pc, r0 43332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks bl s3c2412_sleep_enter1 44332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks 45332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks .align 5 46332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks 47332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks /* this is called twice, first with the Z flag to ensure that the 48332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks * instructions have been loaded into the cache, and the second 49332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks * time to try and suspend the system. 50332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks */ 51332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dookss3c2412_sleep_enter1: 52332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks mcr p15, 0, r0, c7, c10, 4 53332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks mcrne p15, 0, r0, c7, c0, 4 54332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks 55332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks /* if we return from here, it is because an interrupt was 56332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks * active when we tried to shutdown. Try and ack the IRQ and 57332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks * retry, as simply returning causes the system to lock. 58332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks */ 59332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks 60332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks ldrne r9, [ r1 ] 61332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks strne r9, [ r1 ] 62332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks ldrne r9, [ r2 ] 63332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks strne r9, [ r2 ] 64332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks ldrne r9, [ r3 ] 65332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks strne r9, [ r3 ] 66332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks bne s3c2412_sleep_enter1 67332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks 68332349518f1958b0bc1ae3febc2e4f75f214d255Ben Dooks mov pc, r14 69