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/processor.h> 16 17 #include <cobalt.h> 18 19 #define RESET_PORT ((void __iomem *)CKSEG1ADDR(0x1c000000)) 20 #define RESET 0x0f 21 22 DEFINE_LED_TRIGGER(power_off_led_trigger); 23 24 static int __init ledtrig_power_off_init(void) 25 { 26 led_trigger_register_simple("power-off", &power_off_led_trigger); 27 return 0; 28 } 29 device_initcall(ledtrig_power_off_init); 30 31 void cobalt_machine_halt(void) 32 { 33 /* 34 * turn on power off LED on RaQ 35 */ 36 led_trigger_event(power_off_led_trigger, LED_FULL); 37 38 local_irq_disable(); 39 while (1) { 40 if (cpu_wait) 41 cpu_wait(); 42 } 43 } 44 45 void cobalt_machine_restart(char *command) 46 { 47 writeb(RESET, RESET_PORT); 48 49 /* we should never get here */ 50 cobalt_machine_halt(); 51 } 52