| /* SPDX-License-Identifier: GPL-2.0+ */ |
| /* |
| * 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 |
| */ |
| |
| #include <linux/linkage.h> |
| #include <linux/serial_s3c.h> |
| #include <asm/assembler.h> |
| #include "map.h" |
| |
| #include "regs-gpio.h" |
| #include "regs-clock.h" |
| |
| #include "regs-mem-s3c24xx.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 |
| ret lr |
