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gerrit-public.fairphone.software / kernel / msm-4.9 / d299c29039aae518d0e70fc26fb158a80dfcd31a / . / arch / arm / mach-s3c24xx / sleep-s3c2410.S
blob: dd47c8fa07fae7b17e8d9a48c58c3f0d22c13397 [file] [log] [blame]
Uwe Kleine-König58862692007-05-09 07:51:49 +0200[diff] [blame]1/* linux/arch/arm/mach-s3c2410/sleep.S
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]2 *
3 * Copyright (c) 2004 Simtec Electronics
4 * Ben Dooks <ben@simtec.co.uk>
5 *
6 * S3C2410 Power Manager (Suspend-To-RAM) support
7 *
8 * Based on PXA/SA1100 sleep code by:
9 * Nicolas Pitre, (c) 2002 Monta Vista Software Inc
10 * Cliff Brake, (c) 2001
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25*/
26
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]27#include <linux/linkage.h>
28#include <asm/assembler.h>
Russell Kinga09e64f2008-08-05 16:14:15 +0100[diff] [blame]29#include <mach/hardware.h>
30#include <mach/map.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]31
Russell Kinga09e64f2008-08-05 16:14:15 +0100[diff] [blame]32#include <mach/regs-gpio.h>
33#include <mach/regs-clock.h>
Ben Dooksa2b7ba92008-10-07 22:26:09 +0100[diff] [blame]34#include <plat/regs-serial.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]35
Kukjin Kim37c3adc2013-02-03 17:00:11 -0800[diff] [blame]36#include "regs-mem.h"
37
Ben Dooksa21765a2007-02-11 18:31:01 +0100[diff] [blame]38 /* s3c2410_cpu_suspend
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]39 *
Ben Dooksa21765a2007-02-11 18:31:01 +0100[diff] [blame]40 * put the cpu into sleep mode
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]41 */
42
Ben Dooksa21765a2007-02-11 18:31:01 +0100[diff] [blame]43ENTRY(s3c2410_cpu_suspend)
44 @@ prepare cpu to sleep
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]45
Ben Dooksa21765a2007-02-11 18:31:01 +0100[diff] [blame]46 ldr r4, =S3C2410_REFRESH
47 ldr r5, =S3C24XX_MISCCR
48 ldr r6, =S3C2410_CLKCON
Arnd Bergmann28157742013-01-08 21:58:31 +0000[diff] [blame]49 ldr r7, [r4] @ get REFRESH (and ensure in TLB)
50 ldr r8, [r5] @ get MISCCR (and ensure in TLB)
51 ldr r9, [r6] @ get CLKCON (and ensure in TLB)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]52
Ben Dooksa21765a2007-02-11 18:31:01 +0100[diff] [blame]53 orr r7, r7, #S3C2410_REFRESH_SELF @ SDRAM sleep command
54 orr r8, r8, #S3C2410_MISCCR_SDSLEEP @ SDRAM power-down signals
55 orr r9, r9, #S3C2410_CLKCON_POWER @ power down command
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]56
Ben Dooksa21765a2007-02-11 18:31:01 +0100[diff] [blame]57 teq pc, #0 @ first as a trial-run to load cache
58 bl s3c2410_do_sleep
59 teq r0, r0 @ now do it for real
60 b s3c2410_do_sleep @
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]61
Ben Dooksa21765a2007-02-11 18:31:01 +0100[diff] [blame]62 @@ align next bit of code to cache line
Matt Reimer4b210fa2007-02-12 21:00:32 +0100[diff] [blame]63 .align 5
Ben Dooksa21765a2007-02-11 18:31:01 +0100[diff] [blame]64s3c2410_do_sleep:
Arnd Bergmann28157742013-01-08 21:58:31 +0000[diff] [blame]65 streq r7, [r4] @ SDRAM sleep command
66 streq r8, [r5] @ SDRAM power-down config
67 streq r9, [r6] @ CPU sleep
Ben Dooksa21765a2007-02-11 18:31:01 +0100[diff] [blame]681: beq 1b
69 mov pc, r14