40 lines
799 B
C
40 lines
799 B
C
#include <types.h>
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#ifndef CLOCK_H
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#define CLOCK_H
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struct clocksource {
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uint32_t shift;
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uint32_t mult;
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uint64_t (*read)(void);
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uint64_t cycle_last;
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uint64_t mask;
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};
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static inline uint32_t cyc2ns(struct clocksource *cs, uint64_t cycles)
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{
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uint64_t ret = cycles;
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ret = (ret * cs->mult) >> cs->shift;
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return ret;
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}
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int init_clock(struct clocksource *);
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uint64_t get_time_ns(void);
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uint32_t clocksource_hz2mult(uint32_t hz, uint32_t shift_constant);
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int is_timeout(uint64_t start_ns, uint64_t time_offset_ns);
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// void udelay(unsigned long usecs);
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void ndelay(unsigned long nsecs);
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void mdelay(unsigned long msecs);
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#define SECOND ((uint64_t)(1000 * 1000 * 1000))
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#define MSECOND ((uint64_t)(1000 * 1000))
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#define USECOND ((uint64_t)(1000))
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#endif /* CLOCK_H */
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