arch/cris/kernel/time.c

   1 /*
   2  *  linux/arch/cris/kernel/time.c
   3  *
   4  *  Copyright (C) 1991, 1992, 1995  Linus Torvalds
   5  *  Copyright (C) 1999, 2000, 2001 Axis Communications AB
   6  *
   7  * 1994-07-02    Alan Modra
   8  *      fixed set_rtc_mmss, fixed time.year for >= 2000, new mktime
   9  * 1995-03-26    Markus Kuhn
  10  *      fixed 500 ms bug at call to set_rtc_mmss, fixed DS12887
  11  *      precision CMOS clock update
  12  * 1996-05-03    Ingo Molnar
  13  *      fixed time warps in do_[slow|fast]_gettimeoffset()
  14  * 1997-09-10   Updated NTP code according to technical memorandum Jan '96
  15  *              "A Kernel Model for Precision Timekeeping" by Dave Mills
  16  *
  17  * Linux/CRIS specific code:
  18  *
  19  * Authors:    Bjorn Wesen
  20  *             Johan Adolfsson
  21  *
  22  */
  23
  24 #include <linux/errno.h>
  25 #include <linux/module.h>
  26 #include <linux/param.h>
  27 #include <linux/jiffies.h>
  28 #include <linux/bcd.h>
  29 #include <linux/timex.h>
  30 #include <linux/init.h>
  31 #include <linux/profile.h>
  32 #include <linux/sched/clock.h>
  33
  34
  35 #define D(x)
  36
  37 #define TICK_SIZE tick
  38
  39 extern unsigned long loops_per_jiffy; /* init/main.c */
  40 unsigned long loops_per_usec;
  41
  42 extern void cris_profile_sample(struct pt_regs* regs);
  43
  44 void
  45 cris_do_profile(struct pt_regs* regs)
  46 {
  47
  48 #ifdef CONFIG_SYSTEM_PROFILER
  49         cris_profile_sample(regs);
  50 #endif
  51
  52 #ifdef CONFIG_PROFILING
  53         profile_tick(CPU_PROFILING);
  54 #endif
  55 }
  56
  57 #ifndef CONFIG_GENERIC_SCHED_CLOCK
  58 unsigned long long sched_clock(void)
  59 {
  60         return (unsigned long long)jiffies * (NSEC_PER_SEC / HZ) +
  61                 get_ns_in_jiffie();
  62 }
  63 #endif
  64
  65 static int
  66 __init init_udelay(void)
  67 {
  68         loops_per_usec = (loops_per_jiffy * HZ) / 1000000;
  69         return 0;
  70 }
  71
  72 __initcall(init_udelay);