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58862699 | 1 | /* linux/arch/arm/mach-s3c2410/sleep.S |
1da177e4 LT |
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 | ||
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27 | #include <linux/linkage.h> |
28 | #include <asm/assembler.h> | |
a09e64fb RK |
29 | #include <mach/hardware.h> |
30 | #include <mach/map.h> | |
1da177e4 | 31 | |
a09e64fb RK |
32 | #include <mach/regs-gpio.h> |
33 | #include <mach/regs-clock.h> | |
34 | #include <mach/regs-mem.h> | |
a2b7ba9c | 35 | #include <plat/regs-serial.h> |
1da177e4 | 36 | |
a21765a7 | 37 | /* s3c2410_cpu_suspend |
1da177e4 | 38 | * |
a21765a7 | 39 | * put the cpu into sleep mode |
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40 | */ |
41 | ||
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42 | ENTRY(s3c2410_cpu_suspend) |
43 | @@ prepare cpu to sleep | |
44 | ||
45 | ldr r4, =S3C2410_REFRESH | |
46 | ldr r5, =S3C24XX_MISCCR | |
47 | ldr r6, =S3C2410_CLKCON | |
48 | ldr r7, [ r4 ] @ get REFRESH (and ensure in TLB) | |
49 | ldr r8, [ r5 ] @ get MISCCR (and ensure in TLB) | |
50 | ldr r9, [ r6 ] @ get CLKCON (and ensure in TLB) | |
51 | ||
52 | orr r7, r7, #S3C2410_REFRESH_SELF @ SDRAM sleep command | |
53 | orr r8, r8, #S3C2410_MISCCR_SDSLEEP @ SDRAM power-down signals | |
54 | orr r9, r9, #S3C2410_CLKCON_POWER @ power down command | |
55 | ||
56 | teq pc, #0 @ first as a trial-run to load cache | |
57 | bl s3c2410_do_sleep | |
58 | teq r0, r0 @ now do it for real | |
59 | b s3c2410_do_sleep @ | |
60 | ||
61 | @@ align next bit of code to cache line | |
4b210faf | 62 | .align 5 |
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63 | s3c2410_do_sleep: |
64 | streq r7, [ r4 ] @ SDRAM sleep command | |
65 | streq r8, [ r5 ] @ SDRAM power-down config | |
66 | streq r9, [ r6 ] @ CPU sleep | |
67 | 1: beq 1b | |
68 | mov pc, r14 |