1 /*
2  * Cobalt Reset operations
3  *
4  * This file is subject to the terms and conditions of the GNU General Public
5  * License.  See the file "COPYING" in the main directory of this archive
6  * for more details.
7  *
8  * Copyright (C) 1995, 1996, 1997 by Ralf Baechle
9  * Copyright (C) 2001 by Liam Davies (ldavies@agile.tv)
10  */
11 #include <linux/init.h>
12 #include <linux/io.h>
13 #include <linux/leds.h>
14 
15 #include <asm/idle.h>
16 #include <asm/processor.h>
17 
18 #include <cobalt.h>
19 
20 #define RESET_PORT	((void __iomem *)CKSEG1ADDR(0x1c000000))
21 #define RESET		0x0f
22 
23 DEFINE_LED_TRIGGER(power_off_led_trigger);
24 
ledtrig_power_off_init(void)25 static int __init ledtrig_power_off_init(void)
26 {
27 	led_trigger_register_simple("power-off", &power_off_led_trigger);
28 	return 0;
29 }
30 device_initcall(ledtrig_power_off_init);
31 
cobalt_machine_halt(void)32 void cobalt_machine_halt(void)
33 {
34 	/*
35 	 * turn on power off LED on RaQ
36 	 */
37 	led_trigger_event(power_off_led_trigger, LED_FULL);
38 
39 	local_irq_disable();
40 	while (1) {
41 		if (cpu_wait)
42 			cpu_wait();
43 	}
44 }
45 
cobalt_machine_restart(char * command)46 void cobalt_machine_restart(char *command)
47 {
48 	writeb(RESET, RESET_PORT);
49 
50 	/* we should never get here */
51 	cobalt_machine_halt();
52 }
53