/arch/mips/gt64120/momenco_ocelot/reset.c

 1/*
 2 * This program is free software; you can redistribute  it and/or modify it
 3 * under  the terms of  the GNU General  Public License as published by the
 4 * Free Software Foundation;  either version 2 of the  License, or (at your
 5 * option) any later version.
 6 *
 7 * Copyright (C) 1997, 2001 Ralf Baechle
 8 * Copyright 2001 MontaVista Software Inc.
 9 * Author: jsun@mvista.com or jsun@junsun.net
10 */
11#include <linux/sched.h>
12#include <linux/mm.h>
13#include <asm/io.h>
14#include <asm/pgtable.h>
15#include <asm/processor.h>
16#include <asm/reboot.h>
17#include <asm/system.h>
18#include <linux/delay.h>
19
20void momenco_ocelot_restart(char *command)
21{
22	void *nvram = ioremap_nocache(0x2c807000, 0x1000);
23
24	if (!nvram) {
25		printk(KERN_NOTICE "ioremap of reset register failed\n");
26		return;
27	}
28	writeb(0x84, nvram + 0xff7); /* Ask the NVRAM/RTC/watchdog chip to
29					assert reset in 1/16 second */
30	mdelay(10+(1000/16));
31	iounmap(nvram);
32	printk(KERN_NOTICE "Watchdog reset failed\n");
33}
34
35void momenco_ocelot_halt(void)
36{
37	printk(KERN_NOTICE "\n** You can safely turn off the power\n");
38	while (1)
39		__asm__(".set\tmips3\n\t"
40	                "wait\n\t"
41			".set\tmips0");
42}
43
44void momenco_ocelot_power_off(void)
45{
46	momenco_ocelot_halt();
47}