/*
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* SPDX-License-Identifier: GPL-2.0
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*/
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#ifndef _COBALT_KERNEL_DOVETAIL_CLOCK_H
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#define _COBALT_KERNEL_DOVETAIL_CLOCK_H
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#include <cobalt/uapi/kernel/types.h>
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#include <cobalt/kernel/assert.h>
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#include <linux/ktime.h>
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#include <linux/errno.h>
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struct timespec64;
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static inline u64 pipeline_read_cycle_counter(void)
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{
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/*
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* With Dovetail, our idea of time is directly based on a
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* refined count of nanoseconds since the epoch, the hardware
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* time counter is transparent to us. For this reason,
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* xnclock_ticks_to_ns() and xnclock_ns_to_ticks() are
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* idempotent when building for Dovetail.
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*/
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return ktime_get_mono_fast_ns();
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}
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static inline xnticks_t pipeline_read_wallclock(void)
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{
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return ktime_get_real_fast_ns();
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}
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static inline int pipeline_set_wallclock(xnticks_t epoch_ns)
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{
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return -EOPNOTSUPP;
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}
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void pipeline_set_timer_shot(unsigned long cycles);
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const char *pipeline_timer_name(void);
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static inline const char *pipeline_clock_name(void)
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{
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return "<Linux clocksource>";
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}
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static inline int pipeline_get_host_time(struct timespec64 *tp)
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{
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/* Convert ktime_get_real_fast_ns() to timespec. */
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*tp = ktime_to_timespec64(ktime_get_real_fast_ns());
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return 0;
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}
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static inline void pipeline_init_clock(void)
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{
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/* N/A */
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}
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static inline xnsticks_t xnclock_core_ticks_to_ns(xnsticks_t ticks)
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{
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return ticks;
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}
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static inline xnsticks_t xnclock_core_ticks_to_ns_rounded(xnsticks_t ticks)
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{
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return ticks;
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}
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static inline xnsticks_t xnclock_core_ns_to_ticks(xnsticks_t ns)
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{
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return ns;
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}
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#endif /* !_COBALT_KERNEL_DOVETAIL_CLOCK_H */
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