acrn-kernel/arch/mips/gt64120/momenco_ocelot/reset.c

48 lines
1.2 KiB
C

/*
* 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.
*
* Copyright (C) 1997, 2001 Ralf Baechle
* Copyright 2001 MontaVista Software Inc.
* Author: jsun@mvista.com or jsun@junsun.net
*/
#include <linux/sched.h>
#include <linux/mm.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/processor.h>
#include <asm/reboot.h>
#include <asm/system.h>
#include <linux/delay.h>
void momenco_ocelot_restart(char *command)
{
void *nvram = ioremap_nocache(0x2c807000, 0x1000);
if (!nvram) {
printk(KERN_NOTICE "ioremap of reset register failed\n");
return;
}
writeb(0x84, nvram + 0xff7); /* Ask the NVRAM/RTC/watchdog chip to
assert reset in 1/16 second */
mdelay(10+(1000/16));
iounmap(nvram);
printk(KERN_NOTICE "Watchdog reset failed\n");
}
void momenco_ocelot_halt(void)
{
printk(KERN_NOTICE "\n** You can safely turn off the power\n");
while (1)
__asm__(".set\tmips3\n\t"
"wait\n\t"
".set\tmips0");
}
void momenco_ocelot_power_off(void)
{
momenco_ocelot_halt();
}