blob: 6745e2054f1baa753cae46ef19c5009c7f5b18f5 [file] [log] [blame]
/*
* linux/include/asm-cris/timex.h
*
* CRIS architecture timex specifications
* 2002-03-04 Johan Adolfsson
* Use prescale timer at 25000 Hz instead of the baudrate timer at
* 19200 to get rid of the 64ppm to fast timer (and we get better
* resolution within a jiffie as well.
*/
#ifndef _ASM_CRIS_TIMEX_H
#define _ASM_CRIS_TIMEX_H
/* The prescaler clock runs at 25MHz, we divide it by 1000 in the prescaler */
/* If you change anything here you must check time.c as well... */
#define PRESCALE_FREQ 25000000
#define PRESCALE_VALUE 1000
#define CLOCK_TICK_RATE 25000 /* Underlying frequency of the HZ timer */
/* The timer0 values gives 40us resolution (1/25000) but interrupts at HZ*/
#define TIMER0_FREQ (CLOCK_TICK_RATE)
#define TIMER0_CLKSEL flexible
#define TIMER0_DIV (TIMER0_FREQ/(HZ))
#define GET_JIFFIES_USEC() \
( (TIMER0_DIV - *R_TIMER0_DATA) * (1000000/HZ)/TIMER0_DIV )
unsigned long get_ns_in_jiffie(void);
unsigned long timer_data_to_ns(unsigned long timer_data);
extern inline unsigned long get_us_in_jiffie_highres(void)
{
return get_ns_in_jiffie()/1000;
}
/*
* We don't have a cycle-counter.. but we do not support SMP anyway where this is
* used so it does not matter.
*/
typedef unsigned int cycles_t;
extern inline cycles_t get_cycles(void)
{
return 0;
}
#define vxtime_lock() do {} while (0)
#define vxtime_unlock() do {} while (0)
#endif