2 * Copyright 2012 Konstantin Belousov <kib@FreeBSD.ORG>.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 #include <sys/types.h>
32 #include <sys/eventhandler.h>
33 #include <machine/vdso.h>
35 struct vdso_timehands {
39 uint32_t th_offset_count;
40 uint32_t th_counter_mask;
41 struct bintime th_offset;
42 struct bintime th_boottime;
46 struct vdso_timekeep {
50 struct vdso_timehands tk_th[];
53 #define VDSO_TK_CURRENT_BUSY 0xffffffff
54 #define VDSO_TK_VER_1 0x1
55 #define VDSO_TK_VER_CURR VDSO_TK_VER_1
56 #define VDSO_TH_ALGO_1 0x1
64 int __vdso_clock_gettime(clockid_t clock_id, struct timespec *ts);
65 #pragma weak __vdso_clock_gettime
67 int __vdso_gettimeofday(struct timeval *tv, struct timezone *tz);
68 #pragma weak __vdso_gettimeofday
70 u_int __vdso_gettc(const struct vdso_timehands *vdso_th);
71 #pragma weak __vdso_gettc
77 uint32_t tc_fill_vdso_timehands(struct vdso_timehands *vdso_th);
80 * The cpu_fill_vdso_timehands() function should fill MD-part of the
81 * struct vdso_timehands, which is both machine- and
82 * timecounter-depended. The return value should be 1 if fast
83 * userspace timecounter is enabled by hardware, and 0 otherwise. The
84 * global sysctl enable override is handled by machine-independed code
85 * after cpu_fill_vdso_timehands() call is made.
87 uint32_t cpu_fill_vdso_timehands(struct vdso_timehands *vdso_th);
89 typedef void (*tc_windup_fn)(void *);
90 EVENTHANDLER_DECLARE(tc_windup, tc_windup_fn);
94 #ifdef COMPAT_FREEBSD32
100 struct vdso_timehands32 {
103 uint32_t th_scale[2];
104 uint32_t th_offset_count;
105 uint32_t th_counter_mask;
106 struct bintime32 th_offset;
107 struct bintime32 th_boottime;
111 struct vdso_timekeep32 {
115 struct vdso_timehands32 tk_th[];
118 uint32_t tc_fill_vdso_timehands32(struct vdso_timehands32 *vdso_th32);
119 uint32_t cpu_fill_vdso_timehands32(struct vdso_timehands32 *vdso_th32);