1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_CRIS_ARCH_TIMEX_H
3 #define _ASM_CRIS_ARCH_TIMEX_H
5 #include <hwregs/reg_map.h>
6 #include <hwregs/reg_rdwr.h>
7 #include <hwregs/timer_defs.h>
10 * The clock runs at 100MHz, we divide it by 1000000. If you change anything
11 * here you must check time.c as well.
14 #define CLOCK_TICK_RATE 100000000 /* Underlying frequency of the HZ timer */
16 /* The timer0 values gives 10 ns resolution but interrupts at HZ. */
17 #define TIMER0_FREQ (CLOCK_TICK_RATE)
18 #define TIMER0_DIV (TIMER0_FREQ/(HZ))
20 /* Convert the value in step of 10 ns to 1us without overflow: */
21 #define GET_JIFFIES_USEC() \
22 ((TIMER0_DIV - REG_RD(timer, regi_timer0, r_tmr0_data)) / 100)
24 extern unsigned long get_ns_in_jiffie(void);
26 static inline unsigned long get_us_in_jiffie_highres(void)
28 return get_ns_in_jiffie() / 1000;