1*de43b1a9Skettenis /* $OpenBSD: usertc.c,v 1.2 2020/07/08 09:20:28 kettenis Exp $ */
2d82e6535Spirofti /*
3*de43b1a9Skettenis * Copyright (c) 2020 Mark Kettenis <kettenis@openbsd.org>
4d82e6535Spirofti *
5d82e6535Spirofti * Permission to use, copy, modify, and distribute this software for any
6d82e6535Spirofti * purpose with or without fee is hereby granted, provided that the above
7d82e6535Spirofti * copyright notice and this permission notice appear in all copies.
8d82e6535Spirofti *
9d82e6535Spirofti * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10d82e6535Spirofti * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11d82e6535Spirofti * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12d82e6535Spirofti * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13d82e6535Spirofti * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14d82e6535Spirofti * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15d82e6535Spirofti * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16d82e6535Spirofti */
17d82e6535Spirofti
18d82e6535Spirofti #include <sys/types.h>
19d82e6535Spirofti #include <sys/timetc.h>
20d82e6535Spirofti
21*de43b1a9Skettenis static inline u_int
tick_get_timecount(struct timecounter * tc)22*de43b1a9Skettenis tick_get_timecount(struct timecounter *tc)
23*de43b1a9Skettenis {
24*de43b1a9Skettenis u_int64_t tick;
25*de43b1a9Skettenis
26*de43b1a9Skettenis __asm volatile("rd %%tick, %0" : "=r" (tick));
27*de43b1a9Skettenis
28*de43b1a9Skettenis return (tick & ~0u);
29*de43b1a9Skettenis }
30*de43b1a9Skettenis
31*de43b1a9Skettenis static inline u_int
sys_tick_get_timecount(struct timecounter * tc)32*de43b1a9Skettenis sys_tick_get_timecount(struct timecounter *tc)
33*de43b1a9Skettenis {
34*de43b1a9Skettenis u_int64_t tick;
35*de43b1a9Skettenis
36*de43b1a9Skettenis __asm volatile("rd %%sys_tick, %0" : "=r" (tick));
37*de43b1a9Skettenis
38*de43b1a9Skettenis return (tick & ~0u);
39*de43b1a9Skettenis }
40*de43b1a9Skettenis
41*de43b1a9Skettenis static int
tc_get_timecount(struct timekeep * tk,u_int * tc)42*de43b1a9Skettenis tc_get_timecount(struct timekeep *tk, u_int *tc)
43*de43b1a9Skettenis {
44*de43b1a9Skettenis switch (tk->tk_user) {
45*de43b1a9Skettenis case TC_TICK:
46*de43b1a9Skettenis *tc = tick_get_timecount(NULL);
47*de43b1a9Skettenis return 0;
48*de43b1a9Skettenis case TC_SYS_TICK:
49*de43b1a9Skettenis *tc = sys_tick_get_timecount(NULL);
50*de43b1a9Skettenis return 0;
51*de43b1a9Skettenis }
52*de43b1a9Skettenis
53*de43b1a9Skettenis return -1;
54*de43b1a9Skettenis }
55*de43b1a9Skettenis
56*de43b1a9Skettenis int (*const _tc_get_timecount)(struct timekeep *, u_int *) = tc_get_timecount;
57