/arch/ia64/sn/kernel/sn2/timer.c

https://bitbucket.org/evzijst/gittest · C · 36 lines · 23 code · 6 blank · 7 comment · 0 complexity · 28498b7b77f3c7e2496924ae7b5bbc7b MD5 · raw file 

    

  1. /*
    2. 

  2.  * linux/arch/ia64/sn/kernel/sn2/timer.c
    3. 

  3.  *
    4. 

  4.  * Copyright (C) 2003 Silicon Graphics, Inc.
    5. 

  5.  * Copyright (C) 2003 Hewlett-Packard Co
    6. 

  6.  *	David Mosberger <davidm@hpl.hp.com>: updated for new timer-interpolation infrastructure
    7. 

  7.  */
    8. 

  8. 

  9. #include <linux/init.h>
    10. 

  10. #include <linux/kernel.h>
    11. 

  11. #include <linux/sched.h>
    12. 

  12. #include <linux/time.h>
    13. 

  13. #include <linux/interrupt.h>
    14. 

  14. 

  15. #include <asm/hw_irq.h>
    16. 

  16. #include <asm/system.h>
    17. 

  17. 

  18. #include <asm/sn/leds.h>
    19. 

  19. #include <asm/sn/shub_mmr.h>
    20. 

  20. #include <asm/sn/clksupport.h>
    21. 

  21. 

  22. extern unsigned long sn_rtc_cycles_per_second;
    23. 

  23. 

  24. static struct time_interpolator sn2_interpolator = {
    25. 

  25. 	.drift = -1,
    26. 

  26. 	.shift = 10,
    27. 

  27. 	.mask = (1LL << 55) - 1,
    28. 

  28. 	.source = TIME_SOURCE_MMIO64
    29. 

  29. };
    30. 

  30. 

  31. void __init sn_timer_init(void)
    32. 

  32. {
    33. 

  33. 	sn2_interpolator.frequency = sn_rtc_cycles_per_second;
    34. 

  34. 	sn2_interpolator.addr = RTC_COUNTER_ADDR;
    35. 

  35. 	register_time_interpolator(&sn2_interpolator);
    36. 

  36. }
    37.