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Linux kernel mirror (for testing)
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linux
1#ifndef _ASM_CRIS_ARCH_TIMEX_H
2#define _ASM_CRIS_ARCH_TIMEX_H
3
4#include <asm/arch/hwregs/reg_map.h>
5#include <asm/arch/hwregs/reg_rdwr.h>
6#include <asm/arch/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_timer, r_tmr0_data)) /100 )
22
23extern unsigned long get_ns_in_jiffie(void);
24
25static inline unsigned long get_us_in_jiffie_highres(void)
26{
27 return get_ns_in_jiffie() / 1000;
28}
29
30#endif
31