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 <machine/vdso.h>
34 struct vdso_timehands {
38 uint32_t th_offset_count;
39 uint32_t th_counter_mask;
40 struct bintime th_offset;
41 struct bintime th_boottime;
45 struct vdso_timekeep {
49 struct vdso_timehands tk_th[];
52 #define VDSO_TK_CURRENT_BUSY 0xffffffff
53 #define VDSO_TK_VER_1 0x1
54 #define VDSO_TK_VER_CURR VDSO_TK_VER_1
55 #define VDSO_TH_ALGO_1 0x1
56 #define VDSO_TH_ALGO_2 0x2
57 #define VDSO_TH_ALGO_3 0x3
58 #define VDSO_TH_ALGO_4 0x4
66 int __vdso_clock_gettime(clockid_t clock_id, struct timespec *ts);
67 int __vdso_gettimeofday(struct timeval *tv, struct timezone *tz);
68 int __vdso_gettc(const struct vdso_timehands *vdso_th, u_int *tc);
69 int __vdso_gettimekeep(struct vdso_timekeep **tk);
80 uint32_t sv_timekeep_gen;
83 void timekeep_push_vdso(void);
85 uint32_t tc_fill_vdso_timehands(struct vdso_timehands *vdso_th);
88 * The cpu_fill_vdso_timehands() function should fill MD-part of the
89 * struct vdso_timehands, which is both machine- and
90 * timecounter-depended. The return value should be 1 if fast
91 * userspace timecounter is enabled by hardware, and 0 otherwise. The
92 * global sysctl enable override is handled by machine-independed code
93 * after cpu_fill_vdso_timehands() call is made.
95 uint32_t cpu_fill_vdso_timehands(struct vdso_timehands *vdso_th,
96 struct timecounter *tc);
98 struct vdso_sv_tk *alloc_sv_tk(void);
100 #define VDSO_TH_NUM 4
102 #ifdef COMPAT_FREEBSD32
108 struct vdso_timehands32 {
111 uint32_t th_scale[2];
112 uint32_t th_offset_count;
113 uint32_t th_counter_mask;
114 struct bintime32 th_offset;
115 struct bintime32 th_boottime;
119 struct vdso_timekeep32 {
123 struct vdso_timehands32 tk_th[];
126 uint32_t tc_fill_vdso_timehands32(struct vdso_timehands32 *vdso_th32);
127 uint32_t cpu_fill_vdso_timehands32(struct vdso_timehands32 *vdso_th32,
128 struct timecounter *tc);
129 struct vdso_sv_tk *alloc_sv_tk_compat32(void);