1*63a4e21dScheloha /* $OpenBSD: usertc.c,v 1.2 2022/11/05 16:23:02 cheloha Exp $ */
242ac4c7bSkettenis /*
342ac4c7bSkettenis * Copyright (c) 2020 Paul Irofti <paul@irofti.net>
442ac4c7bSkettenis *
542ac4c7bSkettenis * Permission to use, copy, modify, and distribute this software for any
642ac4c7bSkettenis * purpose with or without fee is hereby granted, provided that the above
742ac4c7bSkettenis * copyright notice and this permission notice appear in all copies.
842ac4c7bSkettenis *
942ac4c7bSkettenis * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
1042ac4c7bSkettenis * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
1142ac4c7bSkettenis * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
1242ac4c7bSkettenis * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
1342ac4c7bSkettenis * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
1442ac4c7bSkettenis * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
1542ac4c7bSkettenis * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1642ac4c7bSkettenis */
1742ac4c7bSkettenis
1842ac4c7bSkettenis #include <sys/types.h>
1942ac4c7bSkettenis #include <sys/timetc.h>
2042ac4c7bSkettenis
21*63a4e21dScheloha static u_int
mftbl(void)22*63a4e21dScheloha mftbl(void)
23*63a4e21dScheloha {
24*63a4e21dScheloha uint64_t value;
25*63a4e21dScheloha __asm volatile ("mftb %0" : "=r"(value));
26*63a4e21dScheloha return value;
27*63a4e21dScheloha }
28*63a4e21dScheloha
29*63a4e21dScheloha static int
tc_get_timecount(struct timekeep * tk,u_int * tc)30*63a4e21dScheloha tc_get_timecount(struct timekeep *tk, u_int *tc)
31*63a4e21dScheloha {
32*63a4e21dScheloha switch (tk->tk_user) {
33*63a4e21dScheloha case TC_TB:
34*63a4e21dScheloha *tc = mftbl();
35*63a4e21dScheloha return 0;
36*63a4e21dScheloha }
37*63a4e21dScheloha return -1;
38*63a4e21dScheloha }
39*63a4e21dScheloha
40*63a4e21dScheloha int (*const _tc_get_timecount)(struct timekeep *, u_int *) = tc_get_timecount;
41