Lines Matching +full:clock +full:- +full:mult

1 // SPDX-License-Identifier: GPL-2.0
4  * counters to full 64-bit ns values.
13 #include <linux/sched/clock.h>
23  * struct clock_data - all data needed for sched_clock() (including
24  *                     registration of a new clock source)
29  * @wrap_kt:		Duration for which clock can run before wrapping.
30  * @rate:		Tick rate of the registered clock.
31  * @actual_read_sched_clock: Registered hardware level clock read function.
35  * into a single 64-byte cache line.
47 static int irqtime = -1;
54 	 * We don't need to use get_jiffies_64 on 32-bit arches here  in jiffy_sched_clock_read()
57 	return (u64)(jiffies - INITIAL_JIFFIES);  in jiffy_sched_clock_read()
61 	.read_data[0] = { .mult = NSEC_PER_SEC / HZ,
66 static inline u64 notrace cyc_to_ns(u64 cyc, u32 mult, u32 shift)  in cyc_to_ns()  argument
68 	return (cyc * mult) >> shift;  in cyc_to_ns()
91 		cyc = (rd->read_sched_clock() - rd->epoch_cyc) &  in sched_clock()
92 		      rd->sched_clock_mask;  in sched_clock()
93 		res = rd->epoch_ns + cyc_to_ns(cyc, rd->mult, rd->shift);  in sched_clock()
100  * Updating the data required to read the clock.
102  * sched_clock() will never observe mis-matched data even if called from
136 	ns = rd.epoch_ns + cyc_to_ns((cyc - rd.epoch_cyc) & rd.sched_clock_mask, rd.mult, rd.shift);  in update_sched_clock()
167 	/* Calculate the mult/shift to convert counter ticks to ns. */  in sched_clock_register()
182 	ns = rd.epoch_ns + cyc_to_ns((cyc - rd.epoch_cyc) & rd.sched_clock_mask, rd.mult, rd.shift);  in sched_clock_register()
187 	rd.mult			= new_mult;  in sched_clock_register()
195 		/* update timeout for clock wrap */  in sched_clock_register()
220 	if (irqtime > 0 || (irqtime == -1 && rate >= 1000000))  in sched_clock_register()
249  * Clock read function for use when the clock is suspended.
251  * This function makes it appear to sched_clock() as if the clock
272 	rd->read_sched_clock = suspended_sched_clock_read;  in sched_clock_suspend()
281 	rd->epoch_cyc = cd.actual_read_sched_clock();  in sched_clock_resume()
283 	rd->read_sched_clock = cd.actual_read_sched_clock;  in sched_clock_resume()