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54 lines
1.3 KiB
54 lines
1.3 KiB
/* SPDX-License-Identifier: GPL-2.0+ */ |
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/* |
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* Copyright (c) 2004 Simtec Electronics |
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* Ben Dooks <ben@simtec.co.uk> |
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* |
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* S3C2410 Power Manager (Suspend-To-RAM) support |
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* |
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* Based on PXA/SA1100 sleep code by: |
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* Nicolas Pitre, (c) 2002 Monta Vista Software Inc |
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* Cliff Brake, (c) 2001 |
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*/ |
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#include <linux/linkage.h> |
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#include <linux/serial_s3c.h> |
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#include <asm/assembler.h> |
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#include "map.h" |
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#include "regs-gpio.h" |
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#include "regs-clock.h" |
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#include "regs-mem-s3c24xx.h" |
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/* s3c2410_cpu_suspend |
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* |
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* put the cpu into sleep mode |
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*/ |
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ENTRY(s3c2410_cpu_suspend) |
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@@ prepare cpu to sleep |
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ldr r4, =S3C2410_REFRESH |
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ldr r5, =S3C24XX_MISCCR |
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ldr r6, =S3C2410_CLKCON |
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ldr r7, [r4] @ get REFRESH (and ensure in TLB) |
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ldr r8, [r5] @ get MISCCR (and ensure in TLB) |
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ldr r9, [r6] @ get CLKCON (and ensure in TLB) |
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orr r7, r7, #S3C2410_REFRESH_SELF @ SDRAM sleep command |
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orr r8, r8, #S3C2410_MISCCR_SDSLEEP @ SDRAM power-down signals |
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orr r9, r9, #S3C2410_CLKCON_POWER @ power down command |
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teq pc, #0 @ first as a trial-run to load cache |
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bl s3c2410_do_sleep |
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teq r0, r0 @ now do it for real |
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b s3c2410_do_sleep @ |
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@@ align next bit of code to cache line |
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.align 5 |
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s3c2410_do_sleep: |
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streq r7, [r4] @ SDRAM sleep command |
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streq r8, [r5] @ SDRAM power-down config |
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streq r9, [r6] @ CPU sleep |
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1: beq 1b |
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ret lr
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