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/arch/mips/momentum/ocelot_c/reset.c

https://bitbucket.org/evzijst/gittest
C | 59 lines | 33 code | 6 blank | 20 comment | 1 complexity | fff22c5a13067772e1283c6eae439ba3 MD5 | raw file
 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 * Copyright (C) 2002 Momentum Computer Inc.
12 * Author: Matthew Dharm <mdharm@momenco.com>
13 *
14 * Louis Hamilton, Red Hat, Inc.
15 * hamilton@redhat.com  [MIPS64 modifications]
16 */
17#include <linux/config.h>
18#include <linux/sched.h>
19#include <linux/mm.h>
20#include <asm/io.h>
21#include <asm/pgtable.h>
22#include <asm/processor.h>
23#include <asm/reboot.h>
24#include <asm/system.h>
25#include <linux/delay.h>
26
27void momenco_ocelot_restart(char *command)
28{
29	/* base address of timekeeper portion of part */
30	void *nvram = (void *)
31#ifdef CONFIG_MIPS64
32		0xfffffffffc807000;
33#else
34		0xfc807000;
35#endif
36
37 	/* Ask the NVRAM/RTC/watchdog chip to assert reset in 1/16 second */
38	writeb(0x84, nvram + 0xff7);
39
40	/* wait for the watchdog to go off */
41	mdelay(100+(1000/16));
42
43	/* if the watchdog fails for some reason, let people know */
44	printk(KERN_NOTICE "Watchdog reset failed\n");
45}
46
47void momenco_ocelot_halt(void)
48{
49	printk(KERN_NOTICE "\n** You can safely turn off the power\n");
50	while (1)
51		__asm__(".set\tmips3\n\t"
52	                "wait\n\t"
53			".set\tmips0");
54}
55
56void momenco_ocelot_power_off(void)
57{
58	momenco_ocelot_halt();
59}