arch/mips/lasat/reset.c

   1 /*
   2  * Thomas Horsten <thh@lasat.com>
   3  * Copyright (C) 2000 LASAT Networks A/S.
   4  *
   5  *  This program is free software; you can distribute it and/or modify it
   6  *  under the terms of the GNU General Public License (Version 2) as
   7  *  published by the Free Software Foundation.
   8  *
   9  *  This program is distributed in the hope it will be useful, but WITHOUT
  10  *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  *  for more details.
  13  *
  14  *  You should have received a copy of the GNU General Public License along
  15  *  with this program; if not, write to the Free Software Foundation, Inc.,
  16  *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
  17  *
  18  * Reset the LASAT board.
  19  */
  20 #include <linux/config.h>
  21 #include <linux/kernel.h>
  22 #include <linux/pm.h>
  23
  24 #include <asm/reboot.h>
  25 #include <asm/system.h>
  26 #include <asm/lasat/lasat.h>
  27
  28 #include "picvue.h"
  29 #include "prom.h"
  30
  31 static void lasat_machine_restart(char *command);
  32 static void lasat_machine_halt(void);
  33
  34 /* Used to set machine to boot in service mode via /proc interface */
  35 int lasat_boot_to_service = 0;
  36
  37 static void lasat_machine_restart(char *command)
  38 {
  39         local_irq_disable();
  40
  41         if (lasat_boot_to_service) {
  42                 printk("machine_restart: Rebooting to service mode\n");
  43                 *(volatile unsigned int *)0xa0000024 = 0xdeadbeef;
  44                 *(volatile unsigned int *)0xa00000fc = 0xfedeabba;
  45         }
  46         *lasat_misc->reset_reg = 0xbedead;
  47         for (;;) ;
  48 }
  49
  50 #define MESSAGE "System halted"
  51 static void lasat_machine_halt(void)
  52 {
  53         local_irq_disable();
  54
  55         /* Disable interrupts and loop forever */
  56         printk(KERN_NOTICE MESSAGE "\n");
  57 #ifdef CONFIG_PICVUE
  58         pvc_clear();
  59         pvc_write_string(MESSAGE, 0, 0);
  60 #endif
  61         prom_monitor();
  62         for (;;) ;
  63 }
  64
  65 void lasat_reboot_setup(void)
  66 {
  67         _machine_restart = lasat_machine_restart;
  68         _machine_halt = lasat_machine_halt;
  69         pm_power_off = lasat_machine_halt;
  70 }