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69 lines
1.6 KiB
69 lines
1.6 KiB
20 years ago
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/*
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* Cobalt Reset operations
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 1995, 1996, 1997 by Ralf Baechle
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* Copyright (C) 2001 by Liam Davies (ldavies@agile.tv)
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*/
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#include <linux/sched.h>
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#include <linux/mm.h>
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#include <asm/cacheflush.h>
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#include <asm/io.h>
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#include <asm/processor.h>
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#include <asm/reboot.h>
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#include <asm/system.h>
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#include <asm/mipsregs.h>
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void cobalt_machine_restart(char *command)
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{
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*(volatile char *)0xbc000000 = 0x0f;
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/*
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* Ouch, we're still alive ... This time we take the silver bullet ...
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* ... and find that we leave the hardware in a state in which the
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* kernel in the flush locks up somewhen during of after the PCI
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* detection stuff.
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*/
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set_c0_status(ST0_BEV | ST0_ERL);
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change_c0_config(CONF_CM_CMASK, CONF_CM_UNCACHED);
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flush_cache_all();
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write_c0_wired(0);
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__asm__ __volatile__(
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"jr\t%0"
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:
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: "r" (0xbfc00000));
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}
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extern int led_state;
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#define kLED 0xBC000000
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#define LEDSet(x) (*(volatile unsigned char *) kLED) = (( unsigned char)x)
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void cobalt_machine_halt(void)
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{
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int mark;
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/* Blink our cute? little LED (number 3)... */
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while (1) {
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led_state = led_state | ( 1 << 3 );
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LEDSet(led_state);
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mark = jiffies;
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while (jiffies<(mark+HZ));
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led_state = led_state & ~( 1 << 3 );
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LEDSet(led_state);
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mark = jiffies;
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while (jiffies<(mark+HZ));
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}
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}
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/*
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* This triggers the luser mode device driver for the power switch ;-)
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*/
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void cobalt_machine_power_off(void)
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{
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printk("You can switch the machine off now.\n");
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cobalt_machine_halt();
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}
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