Lines Matching +full:in +full:- +full:and +full:- +full:around

1 /* SPDX-License-Identifier: GPL-2.0-or-later */
14 #define CYCLECOUNTER_MASK(bits) (u64)((bits) < 64 ? ((1ULL<<(bits))-1) : -1)
17  * struct cyclecounter - hardware abstraction for a free running counter
18  *	Provides completely state-free accessors to the underlying hardware.
20  *	around quickly. Locking rules (if necessary) have to be defined
21  *	by the implementor and user of specific instances of this API.
25  *			subtraction of non-64-bit counters,
38  * struct timecounter - layer above a &struct cyclecounter which counts nanoseconds
40  *	cycle counter wrap around. Initialize with
44  *	cycle counter hardware, locking issues and reading the time
45  *	more often than the cycle counter wraps around. The nanosecond
46  *	counter will only wrap around after ~585 years.
64  * cyclecounter_cyc2ns - converts cycle counter cycles to nanoseconds
77 	ns = (ns * cc->mult) + *frac;  in cyclecounter_cyc2ns()
79 	return ns >> cc->shift;  in cyclecounter_cyc2ns()
83  * timecounter_adjtime - Shifts the time of the clock.
85  * @delta:	Desired change in nanoseconds.
89 	tc->nsec += delta;  in timecounter_adjtime()
93  * timecounter_init - initialize a time counter
107  * timecounter_read - return nanoseconds elapsed since timecounter_init()
111  * In other words, keeps track of time since the same epoch as
119  * timecounter_cyc2time - convert a cycle counter to same
123  * @cycle_tstamp:	a value returned by tc->cc->read()
126  * fall into the interval [-1/2 max cycle count, +1/2 max cycle count],
127  * with "max cycle count" == cs->mask+1.
130  * in the past.