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| author | Zhaoming Luo <zhmingluo@163.com> | 2025-03-24 12:25:51 +0800 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2025-03-25 01:11:12 +0100 |
| commit | 6d91c78f0c240e3c7d81e19e85507e0aec580d6f (patch) | |
| tree | af612893bc051a0725d71154769896c50c3a251e /kern/mach_clock.h | |
| parent | d8fd7d256e412d3b19f7f2291ae95fbb0f6794ec (diff) | |
Integrate HPET so the functions used for getting time can have a higher accuracy
Integrate HPET so host_get_time, host_get_time64, and host_get_uptime64
are more precise. The highest precision can be 10ns when this patch is
applied.
* i386/i386/apic.c: Implement the two high-precision clock interface functions
added in this patch for i386.
* i386/i386at/model_dep.c: Initialize HPET if APIC is defined
* kern/mach_clock.c: Integrate the high-precision clocks to have the
10ns precise time values.
* kern/mach_clock.h: Add two new interface functions for accessing the
high-precision clocks.
Message-ID: <20250324042551.4752-2-zhmingluo@163.com>
Diffstat (limited to 'kern/mach_clock.h')
| -rw-r--r-- | kern/mach_clock.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kern/mach_clock.h b/kern/mach_clock.h index d4f04f5e..e83b638c 100644 --- a/kern/mach_clock.h +++ b/kern/mach_clock.h @@ -110,4 +110,8 @@ extern boolean_t untimeout(timer_func_t *fcn, const void *param); extern int timeopen(dev_t dev, int flag, io_req_t ior); extern void timeclose(dev_t dev, int flag); +/* For high-precision clocks. */ +extern uint32_t hpclock_read_counter(void); +extern uint32_t hpclock_get_counter_period_nsec(void); + #endif /* _KERN_MACH_CLOCK_H_ */ |