arch/mips/kernel/reset.c

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 2001, 06 by Ralf Baechle (ralf@linux-mips.org)
   7  * Copyright (C) 2001 MIPS Technologies, Inc.
   8  */
   9 #include <linux/kernel.h>
  10 #include <linux/export.h>
  11 #include <linux/pm.h>
  12 #include <linux/types.h>
  13 #include <linux/reboot.h>
  14 #include <linux/delay.h>
  15
  16 #include <asm/reboot.h>
  17
  18 /*
  19  * Urgs ...  Too many MIPS machines to handle this in a generic way.
  20  * So handle all using function pointers to machine specific
  21  * functions.
  22  */
  23 void (*_machine_restart)(char *command);
  24 void (*_machine_halt)(void);
  25 void (*pm_power_off)(void);
  26
  27 EXPORT_SYMBOL(pm_power_off);
  28
  29 void machine_restart(char *command)
  30 {
  31         if (_machine_restart)
  32                 _machine_restart(command);
  33
  34 #ifdef CONFIG_SMP
  35         preempt_disable();
  36         smp_send_stop();
  37 #endif
  38         do_kernel_restart(command);
  39         mdelay(1000);
  40         pr_emerg("Reboot failed -- System halted\n");
  41         local_irq_disable();
  42         while (1);
  43 }
  44
  45 void machine_halt(void)
  46 {
  47         if (_machine_halt)
  48                 _machine_halt();
  49
  50 #ifdef CONFIG_SMP
  51         preempt_disable();
  52         smp_send_stop();
  53 #endif
  54         local_irq_disable();
  55         while (1);
  56 }
  57
  58 void machine_power_off(void)
  59 {
  60         if (pm_power_off)
  61                 pm_power_off();
  62
  63 #ifdef CONFIG_SMP
  64         preempt_disable();
  65         smp_send_stop();
  66 #endif
  67         local_irq_disable();
  68         while (1);
  69 }