i386/linux-2.3.21/arch/mips/jazz/reset.c

   1 /*
   2  *  linux/arch/mips/jazz/process.c
   3  *
   4  *  Reset a Jazz machine.
   5  *
   6  *  $Id: reset.c,v 1.3 1998/03/04 08:29:10 ralf Exp $
   7  */
   8
   9 #include <linux/sched.h>
  10 #include <asm/jazz.h>
  11 #include <asm/io.h>
  12 #include <asm/system.h>
  13 #include <asm/reboot.h>
  14 #include <asm/delay.h>
  15 #include <asm/keyboard.h>
  16
  17 static inline void kb_wait(void)
  18 {
  19         unsigned long start = jiffies;
  20
  21         do {
  22                 if (! (kbd_read_status() & 0x02))
  23                         return;
  24         } while (jiffies - start < 50);
  25 }
  26
  27 void jazz_machine_restart(char *command)
  28 {
  29     while (1) {
  30         kb_wait ();
  31         kbd_write_command (0xd1);
  32         kb_wait ();
  33         kbd_write_output (0x00);
  34     }
  35 }
  36
  37 void jazz_machine_halt(void)
  38 {
  39 }
  40
  41 void jazz_machine_power_off(void)
  42 {
  43         /* Jazz machines don't have a software power switch */
  44 }