| /* linux/arch/arm/mach-s3c2410/sleep.S |
| * |
| * Copyright (c) 2004 Simtec Electronics |
| * Ben Dooks <ben@simtec.co.uk> |
| * |
| * S3C2410 Power Manager (Suspend-To-RAM) support |
| * |
| * Based on PXA/SA1100 sleep code by: |
| * Nicolas Pitre, (c) 2002 Monta Vista Software Inc |
| * Cliff Brake, (c) 2001 |
| * |
| * 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-gpio.h> |
| #include <asm/arch/regs-clock.h> |
| #include <asm/arch/regs-mem.h> |
| #include <asm/plat-s3c/regs-serial.h> |
| |
| /* s3c2410_cpu_suspend |
| * |
| * put the cpu into sleep mode |
| */ |
| |
| ENTRY(s3c2410_cpu_suspend) |
| @@ prepare cpu to sleep |
| |
| ldr r4, =S3C2410_REFRESH |
| ldr r5, =S3C24XX_MISCCR |
| ldr r6, =S3C2410_CLKCON |
| ldr r7, [ r4 ] @ get REFRESH (and ensure in TLB) |
| ldr r8, [ r5 ] @ get MISCCR (and ensure in TLB) |
| ldr r9, [ r6 ] @ get CLKCON (and ensure in TLB) |
| |
| orr r7, r7, #S3C2410_REFRESH_SELF @ SDRAM sleep command |
| orr r8, r8, #S3C2410_MISCCR_SDSLEEP @ SDRAM power-down signals |
| orr r9, r9, #S3C2410_CLKCON_POWER @ power down command |
| |
| teq pc, #0 @ first as a trial-run to load cache |
| bl s3c2410_do_sleep |
| teq r0, r0 @ now do it for real |
| b s3c2410_do_sleep @ |
| |
| @@ align next bit of code to cache line |
| .align 5 |
| s3c2410_do_sleep: |
| streq r7, [ r4 ] @ SDRAM sleep command |
| streq r8, [ r5 ] @ SDRAM power-down config |
| streq r9, [ r6 ] @ CPU sleep |
| 1: beq 1b |
| mov pc, r14 |