kernel/2.6.29.6-aldebaran-rt/arch/cris/include/arch-v32/arch/timex.h

   1 #ifndef _ASM_CRIS_ARCH_TIMEX_H
   2 #define _ASM_CRIS_ARCH_TIMEX_H
   3
   4 #include <hwregs/reg_map.h>
   5 #include <hwregs/reg_rdwr.h>
   6 #include <hwregs/timer_defs.h>
   7
   8 /*
   9  * The clock runs at 100MHz, we divide it by 1000000. If you change anything
  10  * here you must check time.c as well.
  11  */
  12
  13 #define CLOCK_TICK_RATE 100000000       /* Underlying frequency of the HZ timer */
  14
  15 /* The timer0 values gives 10 ns resolution but interrupts at HZ. */
  16 #define TIMER0_FREQ (CLOCK_TICK_RATE)
  17 #define TIMER0_DIV (TIMER0_FREQ/(HZ))
  18
  19 /* Convert the value in step of 10 ns to 1us without overflow: */
  20 #define GET_JIFFIES_USEC() \
  21         ((TIMER0_DIV - REG_RD(timer, regi_timer0, r_tmr0_data)) / 100)
  22
  23 extern unsigned long get_ns_in_jiffie(void);
  24
  25 static inline unsigned long get_us_in_jiffie_highres(void)
  26 {
  27         return get_ns_in_jiffie() / 1000;
  28 }
  29
  30 #endif
  31