diff options
Diffstat (limited to 'include/asm-cris/arch-v32/timex.h')
-rw-r--r-- | include/asm-cris/arch-v32/timex.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/include/asm-cris/arch-v32/timex.h b/include/asm-cris/arch-v32/timex.h new file mode 100644 index 0000000..4d0fd23 --- /dev/null +++ b/include/asm-cris/arch-v32/timex.h @@ -0,0 +1,31 @@ +#ifndef _ASM_CRIS_ARCH_TIMEX_H +#define _ASM_CRIS_ARCH_TIMEX_H + +#include <asm/arch/hwregs/reg_map.h> +#include <asm/arch/hwregs/reg_rdwr.h> +#include <asm/arch/hwregs/timer_defs.h> + +/* + * The clock runs at 100MHz, we divide it by 1000000. If you change anything + * here you must check time.c as well. + */ + +#define CLOCK_TICK_RATE 100000000 /* Underlying frequency of the HZ timer */ + +/* The timer0 values gives 10 ns resolution but interrupts at HZ. */ +#define TIMER0_FREQ (CLOCK_TICK_RATE) +#define TIMER0_DIV (TIMER0_FREQ/(HZ)) + +/* Convert the value in step of 10 ns to 1us without overflow: */ +#define GET_JIFFIES_USEC() \ + ( (TIMER0_DIV - REG_RD(timer, regi_timer, r_tmr0_data)) /100 ) + +extern unsigned long get_ns_in_jiffie(void); + +extern inline unsigned long get_us_in_jiffie_highres(void) +{ + return get_ns_in_jiffie() / 1000; +} + +#endif + |