| /* |
| * 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_ARCH_TIMEX_H |
| #define _ASM_CRIS_ARCH_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); |
| |
| static inline unsigned long get_us_in_jiffie_highres(void) |
| { |
| return get_ns_in_jiffie()/1000; |
| } |
| |
| #endif |
