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Diffstat (limited to 'freebsd/sys/sys/timeet.h')
| -rw-r--r-- | freebsd/sys/sys/timeet.h | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/freebsd/sys/sys/timeet.h b/freebsd/sys/sys/timeet.h new file mode 100644 index 00000000..3d50e51d --- /dev/null +++ b/freebsd/sys/sys/timeet.h @@ -0,0 +1,106 @@ +/*- + * Copyright (c) 2010-2013 Alexander Motin <mav@FreeBSD.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer, + * without modification, immediately at the beginning of the file. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#ifndef _SYS_TIMEEC_H_ +#define _SYS_TIMEEC_H_ + +#ifndef _KERNEL +#error "no user-serviceable parts inside" +#endif + +#include <sys/lock.h> +#include <sys/mutex.h> +#include <sys/queue.h> +#include <sys/time.h> + +/* + * `struct eventtimer' is the interface between the hardware which implements + * a event timer and the MI code which uses this to receive time events. + */ + +struct eventtimer; +typedef int et_start_t(struct eventtimer *et, + sbintime_t first, sbintime_t period); +typedef int et_stop_t(struct eventtimer *et); +typedef void et_event_cb_t(struct eventtimer *et, void *arg); +typedef int et_deregister_cb_t(struct eventtimer *et, void *arg); + +struct eventtimer { + SLIST_ENTRY(eventtimer) et_all; + /* Pointer to the next event timer. */ + const char *et_name; + /* Name of the event timer. */ + int et_flags; + /* Set of capabilities flags: */ +#define ET_FLAGS_PERIODIC 1 +#define ET_FLAGS_ONESHOT 2 +#define ET_FLAGS_PERCPU 4 +#define ET_FLAGS_C3STOP 8 +#define ET_FLAGS_POW2DIV 16 + int et_quality; + /* + * Used to determine if this timecounter is better than + * another timecounter. Higher means better. + */ + int et_active; + u_int64_t et_frequency; + /* Base frequency in Hz. */ + sbintime_t et_min_period; + sbintime_t et_max_period; + et_start_t *et_start; + et_stop_t *et_stop; + et_event_cb_t *et_event_cb; + et_deregister_cb_t *et_deregister_cb; + void *et_arg; + void *et_priv; + struct sysctl_oid *et_sysctl; + /* Pointer to the event timer's private parts. */ +}; + +extern struct mtx et_eventtimers_mtx; +#define ET_LOCK() mtx_lock(&et_eventtimers_mtx) +#define ET_UNLOCK() mtx_unlock(&et_eventtimers_mtx) + +/* Driver API */ +int et_register(struct eventtimer *et); +int et_deregister(struct eventtimer *et); +void et_change_frequency(struct eventtimer *et, uint64_t newfreq); +/* Consumer API */ +struct eventtimer *et_find(const char *name, int check, int want); +int et_init(struct eventtimer *et, et_event_cb_t *event, + et_deregister_cb_t *deregister, void *arg); +int et_start(struct eventtimer *et, sbintime_t first, sbintime_t period); +int et_stop(struct eventtimer *et); +int et_ban(struct eventtimer *et); +int et_free(struct eventtimer *et); + +#ifdef SYSCTL_DECL +SYSCTL_DECL(_kern_eventtimer); +#endif +#endif /* !_SYS_TIMETC_H_ */ + |