diff options
Diffstat (limited to 'arch/arm/mach-s3c24xx/sleep-s3c2412.S')
-rw-r--r-- | arch/arm/mach-s3c24xx/sleep-s3c2412.S | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/arch/arm/mach-s3c24xx/sleep-s3c2412.S b/arch/arm/mach-s3c24xx/sleep-s3c2412.S new file mode 100644 index 000000000000..c82418ed714d --- /dev/null +++ b/arch/arm/mach-s3c24xx/sleep-s3c2412.S | |||
@@ -0,0 +1,68 @@ | |||
1 | /* linux/arch/arm/mach-s3c2412/sleep.S | ||
2 | * | ||
3 | * Copyright (c) 2007 Simtec Electronics | ||
4 | * Ben Dooks <ben@simtec.co.uk> | ||
5 | * | ||
6 | * S3C2412 Power Manager low-level sleep support | ||
7 | * | ||
8 | * This program is free software; you can redistribute it and/or modify | ||
9 | * it under the terms of the GNU General Public License as published by | ||
10 | * the Free Software Foundation; either version 2 of the License, or | ||
11 | * (at your option) any later version. | ||
12 | * | ||
13 | * This program is distributed in the hope that it will be useful, | ||
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
16 | * GNU General Public License for more details. | ||
17 | * | ||
18 | * You should have received a copy of the GNU General Public License | ||
19 | * along with this program; if not, write to the Free Software | ||
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
21 | */ | ||
22 | |||
23 | #include <linux/linkage.h> | ||
24 | #include <asm/assembler.h> | ||
25 | #include <mach/hardware.h> | ||
26 | #include <mach/map.h> | ||
27 | |||
28 | #include <mach/regs-irq.h> | ||
29 | |||
30 | .text | ||
31 | |||
32 | .global s3c2412_sleep_enter | ||
33 | |||
34 | s3c2412_sleep_enter: | ||
35 | mov r0, #0 /* argument for coprocessors */ | ||
36 | ldr r1, =S3C2410_INTPND | ||
37 | ldr r2, =S3C2410_SRCPND | ||
38 | ldr r3, =S3C2410_EINTPEND | ||
39 | |||
40 | teq r0, r0 | ||
41 | bl s3c2412_sleep_enter1 | ||
42 | teq pc, r0 | ||
43 | bl s3c2412_sleep_enter1 | ||
44 | |||
45 | .align 5 | ||
46 | |||
47 | /* this is called twice, first with the Z flag to ensure that the | ||
48 | * instructions have been loaded into the cache, and the second | ||
49 | * time to try and suspend the system. | ||
50 | */ | ||
51 | s3c2412_sleep_enter1: | ||
52 | mcr p15, 0, r0, c7, c10, 4 | ||
53 | mcrne p15, 0, r0, c7, c0, 4 | ||
54 | |||
55 | /* if we return from here, it is because an interrupt was | ||
56 | * active when we tried to shutdown. Try and ack the IRQ and | ||
57 | * retry, as simply returning causes the system to lock. | ||
58 | */ | ||
59 | |||
60 | ldrne r9, [ r1 ] | ||
61 | strne r9, [ r1 ] | ||
62 | ldrne r9, [ r2 ] | ||
63 | strne r9, [ r2 ] | ||
64 | ldrne r9, [ r3 ] | ||
65 | strne r9, [ r3 ] | ||
66 | bne s3c2412_sleep_enter1 | ||
67 | |||
68 | mov pc, r14 | ||