include/clock.h

   1 #ifndef CLOCK_H
   2 #define CLOCK_H
   3
   4 struct clocksource {
   5         uint32_t        shift;
   6         uint32_t        mult;
   7         uint64_t        (*read)(void);
   8         uint64_t        cycle_last;
   9         uint64_t        mask;
  10
  11 };
  12
  13 static inline uint32_t cyc2ns(struct clocksource *cs, uint64_t cycles)
  14 {
  15         uint64_t ret = cycles;
  16         ret = (ret * cs->mult) >> cs->shift;
  17         return ret;
  18 }
  19
  20 int init_clock(struct clocksource *);
  21
  22 uint64_t get_time_ns(void);
  23
  24 uint32_t clocksource_hz2mult(uint32_t hz, uint32_t shift_constant);
  25
  26 int is_timeout(uint64_t start_ns, uint64_t time_offset_ns);
  27
  28 // void udelay(unsigned long usecs);
  29
  30 void ndelay(unsigned long nsecs);
  31 void mdelay(unsigned long msecs);
  32
  33 #define SECOND ((uint64_t)(1000 * 1000 * 1000))
  34 #define MSECOND ((uint64_t)(1000 * 1000))
  35 #define USECOND ((uint64_t)(1000))
  36
  37 #endif /* CLOCK_H */