reset.c 1.5 KB

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556
  1. /*
  2. * This program is free software; you can redistribute it and/or modify it
  3. * under the terms of the GNU General Public License as published by the
  4. * Free Software Foundation; either version 2 of the License, or (at your
  5. * option) any later version.
  6. *
  7. * Copyright (C) 1997, 2001 Ralf Baechle
  8. * Copyright 2001 MontaVista Software Inc.
  9. * Author: jsun@mvista.com or jsun@junsun.net
  10. *
  11. * Copyright (C) 2002 Momentum Computer Inc.
  12. * Author: Matthew Dharm <mdharm@momenco.com>
  13. *
  14. * Louis Hamilton, Red Hat, Inc.
  15. * hamilton@redhat.com [MIPS64 modifications]
  16. */
  17. #include <linux/sched.h>
  18. #include <linux/mm.h>
  19. #include <asm/io.h>
  20. #include <asm/pgtable.h>
  21. #include <asm/processor.h>
  22. #include <asm/reboot.h>
  23. #include <asm/system.h>
  24. #include <linux/delay.h>
  25. void momenco_jaguar_restart(char *command)
  26. {
  27. /* base address of timekeeper portion of part */
  28. #ifdef CONFIG_64BIT
  29. void *nvram = (void*) 0xfffffffffc807000;
  30. #else
  31. void *nvram = (void*) 0xfc807000;
  32. #endif
  33. /* Ask the NVRAM/RTC/watchdog chip to assert reset in 1/16 second */
  34. writeb(0x84, nvram + 0xff7);
  35. /* wait for the watchdog to go off */
  36. mdelay(100+(1000/16));
  37. /* if the watchdog fails for some reason, let people know */
  38. printk(KERN_NOTICE "Watchdog reset failed\n");
  39. }
  40. void momenco_jaguar_halt(void)
  41. {
  42. printk(KERN_NOTICE "\n** You can safely turn off the power\n");
  43. while (1)
  44. __asm__(".set\tmips3\n\t"
  45. "wait\n\t"
  46. ".set\tmips0");
  47. }
  48. void momenco_jaguar_power_off(void)
  49. {
  50. momenco_jaguar_halt();
  51. }