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TOMOYO Linux Cross Reference
Linux/arch/cris/include/arch-v32/arch/timex.h

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  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 
 32 

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