2 * Copyright (c) 2014, Bryan Venteicher <bryanv@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 AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 #include <sys/types.h>
33 #include <sys/timetc.h>
35 struct pvclock_vcpu_time_info {
38 uint64_t tsc_timestamp;
40 uint32_t tsc_to_system_mul;
46 #define PVCLOCK_FLAG_TSC_STABLE 0x01
47 #define PVCLOCK_FLAG_GUEST_PASUED 0x02
49 typedef struct pvclock_wall_clock *pvclock_get_wallclock_t(void *arg);
51 struct pvclock_wall_clock {
58 /* Public; initialized by the caller of 'pvclock_init()': */
59 pvclock_get_wallclock_t *get_wallclock;
60 void *get_wallclock_arg;
61 struct pvclock_vcpu_time_info *timeinfos;
62 bool stable_flag_supported;
64 /* Private; initialized by the 'pvclock' API: */
65 struct timecounter tc;
69 * NOTE: 'pvclock_get_timecount()' and 'pvclock_get_wallclock()' are purely
70 * transitional; they should be removed after 'dev/xen/timer/timer.c' has been
71 * migrated to the 'struct pvclock' API.
73 void pvclock_resume(void);
74 uint64_t pvclock_tsc_freq(struct pvclock_vcpu_time_info *ti);
75 uint64_t pvclock_get_timecount(struct pvclock_vcpu_time_info *ti);
76 void pvclock_get_wallclock(struct pvclock_wall_clock *wc,
79 void pvclock_init(struct pvclock *pvc, device_t dev,
80 const char *tc_name, int tc_quality, u_int tc_flags);
81 void pvclock_gettime(struct pvclock *pvc, struct timespec *ts);
82 int pvclock_destroy(struct pvclock *pvc);