reset.c

linux 内核源代码

/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 * Copyright (C) 1997 Ralf Baechle
 */
#include <linux/kernel.h>

#include <asm/cacheflush.h>
#include <asm/mipsregs.h>

void wrppmc_machine_restart(char *command)
{
	/*
	 * Ouch, we're still alive ... This time we take the silver bullet ...
	 * ... and find that we leave the hardware in a state in which the
	 * kernel in the flush locks up somewhen during of after the PCI
	 * detection stuff.
	 */
	local_irq_disable();
	set_c0_status(ST0_BEV | ST0_ERL);
	change_c0_config(CONF_CM_CMASK, CONF_CM_UNCACHED);
	flush_cache_all();
	write_c0_wired(0);
	__asm__ __volatile__("jr\t%0"::"r"(0xbfc00000));
}

void wrppmc_machine_halt(void)
{
	local_irq_disable();

	printk(KERN_NOTICE "You can safely turn off the power\n");
	while (1) {
		__asm__(
			".set\tmips3\n\t"
			"wait\n\t"
			".set\tmips0"
		);
	}
}

void wrppmc_machine_power_off(void)
{
	wrppmc_machine_halt();
}