/*-
* Copyright (c) 2016 embedded brains GmbH
* 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.
* 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*/
#if !defined(_SYS_TIME_H_) || !defined(_KERNEL)
#error "must be included via <sys/time.h> in kernel space"
#endif
#include <machine/_timecounter.h>
/* Operations on timespecs */
#define timespecclear(tvp) ((tvp)->tv_sec = (tvp)->tv_nsec = 0)
#define timespecisset(tvp) ((tvp)->tv_sec || (tvp)->tv_nsec)
#define timespeccmp(tvp, uvp, cmp) \
(((tvp)->tv_sec == (uvp)->tv_sec) ? \
((tvp)->tv_nsec cmp (uvp)->tv_nsec) : \
((tvp)->tv_sec cmp (uvp)->tv_sec))
#define timespecadd(vvp, uvp) \
do { \
(vvp)->tv_sec += (uvp)->tv_sec; \
(vvp)->tv_nsec += (uvp)->tv_nsec; \
if ((vvp)->tv_nsec >= 1000000000) { \
(vvp)->tv_sec++; \
(vvp)->tv_nsec -= 1000000000; \
} \
} while (0)
#define timespecsub(vvp, uvp) \
do { \
(vvp)->tv_sec -= (uvp)->tv_sec; \
(vvp)->tv_nsec -= (uvp)->tv_nsec; \
if ((vvp)->tv_nsec < 0) { \
(vvp)->tv_sec--; \
(vvp)->tv_nsec += 1000000000; \
} \
} while (0)
/* Operations on timevals. */
#define timevalclear(tvp) ((tvp)->tv_sec = (tvp)->tv_usec = 0)
#define timevalisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec)
#define timevalcmp(tvp, uvp, cmp) \
(((tvp)->tv_sec == (uvp)->tv_sec) ? \
((tvp)->tv_usec cmp (uvp)->tv_usec) : \
((tvp)->tv_sec cmp (uvp)->tv_sec))
/* timevaladd and timevalsub are not inlined */
/*
* Kernel to clock driver interface.
*/
void inittodr(time_t base);
void resettodr(void);
#define time_second _Timecounter_Time_second
#define time_uptime _Timecounter_Time_uptime
extern struct timeval boottime;
extern struct bintime tc_tick_bt;
extern sbintime_t tc_tick_sbt;
extern struct bintime tick_bt;
extern sbintime_t tick_sbt;
extern int tc_precexp;
extern int tc_timepercentage;
extern struct bintime bt_timethreshold;
extern struct bintime bt_tickthreshold;
extern sbintime_t sbt_timethreshold;
extern sbintime_t sbt_tickthreshold;
/*
* Functions for looking at our clock: [get]{bin,nano,micro}[up]time()
*
* Functions without the "get" prefix returns the best timestamp
* we can produce in the given format.
*
* "bin" == struct bintime == seconds + 64 bit fraction of seconds.
* "nano" == struct timespec == seconds + nanoseconds.
* "micro" == struct timeval == seconds + microseconds.
*
* Functions containing "up" returns time relative to boot and
* should be used for calculating time intervals.
*
* Functions without "up" returns UTC time.
*
* Functions with the "get" prefix returns a less precise result
* much faster than the functions without "get" prefix and should
* be used where a precision of 1/hz seconds is acceptable or where
* performance is priority. (NB: "precision", _not_ "resolution" !)
*/
#define binuptime(_bt) _Timecounter_Binuptime(_bt)
#define nanouptime(_tsp) _Timecounter_Nanouptime(_tsp)
#define microuptime(_tvp) _Timecounter_Microuptime(_tvp)
static __inline sbintime_t
sbinuptime(void)
{
struct bintime _bt;
binuptime(&_bt);
return (bttosbt(_bt));
}
#define bintime(_bt) _Timecounter_Bintime(_bt)
#define nanotime(_tsp) _Timecounter_Nanotime(_tsp)
#define microtime(_tvp) _Timecounter_Microtime(_tvp)
#define getbinuptime(_bt) _Timecounter_Getbinuptime(_bt)
#define getnanouptime(_tsp) _Timecounter_Getnanouptime(_tsp)
#define getmicrouptime(_tvp) _Timecounter_Getmicrouptime(_tvp)
static __inline sbintime_t
getsbinuptime(void)
{
struct bintime _bt;
getbinuptime(&_bt);
return (bttosbt(_bt));
}
#define getbintime(_bt) _Timecounter_Getbintime(_bt)
#define getnanotime(_tsp) _Timecounter_Getnanotime(_tsp)
#define getmicrotime(_tvp) _Timecounter_Getmicrotime(_tvp)
#define getboottime(_tvp) _Timecounter_Getboottime(_tvp)
#define getboottimebin(_bt) _Timecounter_Getboottimebin(_bt)
/* Other functions */
int itimerdecr(struct itimerval *itp, int usec);
int itimerfix(struct timeval *tv);
int ppsratecheck(struct timeval *, int *, int);
int ratecheck(struct timeval *, const struct timeval *);
void timevaladd(struct timeval *t1, const struct timeval *t2);
void timevalsub(struct timeval *t1, const struct timeval *t2);
int tvtohz(struct timeval *tv);
#define TC_DEFAULTPERC 5
#define BT2FREQ(bt) \
(((uint64_t)0x8000000000000000 + ((bt)->frac >> 2)) / \
((bt)->frac >> 1))
#define SBT2FREQ(sbt) ((SBT_1S + ((sbt) >> 1)) / (sbt))
#define FREQ2BT(freq, bt) \
{ \
(bt)->sec = 0; \
(bt)->frac = ((uint64_t)0x8000000000000000 / (freq)) << 1; \
}
#define TIMESEL(sbt, sbt2) \
(((sbt2) >= sbt_timethreshold) ? \
((*(sbt) = getsbinuptime()), 1) : ((*(sbt) = sbinuptime()), 0))
