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 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 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 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