/*- *********************************************************************** * * * Copyright (c) David L. Mills 1993-2001 * * Copyright (c) Poul-Henning Kamp 2000-2001 * * * * Permission to use, copy, modify, and distribute this software and * * its documentation for any purpose and without fee is hereby * * granted, provided that the above copyright notice appears in all * * copies and that both the copyright notice and this permission * * notice appear in supporting documentation, and that the name * * University of Delaware not be used in advertising or publicity * * pertaining to distribution of the software without specific, * * written prior permission. The University of Delaware makes no * * representations about the suitability this software for any * * purpose. It is provided "as is" without express or implied * * warranty. * * * *********************************************************************** * * This header file defines the Network Time Protocol (NTP) interfaces * for user and daemon application programs. * * This file was originally created 17 Sep 93 by David L. Mills, Professor * of University of Delaware, building on work which had already been ongoing * for a decade and a half at that point in time. * * In 2000 the APIs got a upgrade from microseconds to nanoseconds, * a joint work between Poul-Henning Kamp and David L. Mills. * */ #ifndef _SYS_TIMEX_H_ #define _SYS_TIMEX_H_ 1 #define NTP_API 4 /* NTP API version */ #ifdef __FreeBSD__ #include <sys/_timespec.h> #endif /* __FreeBSD__ */ /* * The following defines establish the performance envelope of the * kernel discipline loop. Phase or frequency errors greater than * NAXPHASE or MAXFREQ are clamped to these maxima. For update intervals * less than MINSEC, the loop always operates in PLL mode; while, for * update intervals greater than MAXSEC, the loop always operates in FLL * mode. Between these two limits the operating mode is selected by the * STA_FLL bit in the status word. */ #define MAXPHASE 500000000L /* max phase error (ns) */ #define MAXFREQ 500000L /* max freq error (ns/s) */ #define MINSEC 256 /* min FLL update interval (s) */ #define MAXSEC 2048 /* max PLL update interval (s) */ #define NANOSECOND 1000000000L /* nanoseconds in one second */ #define SCALE_PPM (65536 / 1000) /* crude ns/s to scaled PPM */ #define MAXTC 10 /* max time constant */ /* * Control mode codes (timex.modes) */ #define MOD_OFFSET 0x0001 /* set time offset */ #define MOD_FREQUENCY 0x0002 /* set frequency offset */ #define MOD_MAXERROR 0x0004 /* set maximum time error */ #define MOD_ESTERROR 0x0008 /* set estimated time error */ #define MOD_STATUS 0x0010 /* set clock status bits */ #define MOD_TIMECONST 0x0020 /* set PLL time constant */ #define MOD_PPSMAX 0x0040 /* set PPS maximum averaging time */ #define MOD_TAI 0x0080 /* set TAI offset */ #define MOD_MICRO 0x1000 /* select microsecond resolution */ #define MOD_NANO 0x2000 /* select nanosecond resolution */ #define MOD_CLKB 0x4000 /* select clock B */ #define MOD_CLKA 0x8000 /* select clock A */ /* * Status codes (timex.status) */ #define STA_PLL 0x0001 /* enable PLL updates (rw) */ #define STA_PPSFREQ 0x0002 /* enable PPS freq discipline (rw) */ #define STA_PPSTIME 0x0004 /* enable PPS time discipline (rw) */ #define STA_FLL 0x0008 /* enable FLL mode (rw) */ #define STA_INS 0x0010 /* insert leap (rw) */ #define STA_DEL 0x0020 /* delete leap (rw) */ #define STA_UNSYNC 0x0040 /* clock unsynchronized (rw) */ #define STA_FREQHOLD 0x0080 /* hold frequency (rw) */ #define STA_PPSSIGNAL 0x0100 /* PPS signal present (ro) */ #define STA_PPSJITTER 0x0200 /* PPS signal jitter exceeded (ro) */ #define STA_PPSWANDER 0x0400 /* PPS signal wander exceeded (ro) */ #define STA_PPSERROR 0x0800 /* PPS signal calibration error (ro) */ #define STA_CLOCKERR 0x1000 /* clock hardware fault (ro) */ #define STA_NANO 0x2000 /* resolution (0 = us, 1 = ns) (ro) */ #define STA_MODE 0x4000 /* mode (0 = PLL, 1 = FLL) (ro) */ #define STA_CLK 0x8000 /* clock source (0 = A, 1 = B) (ro) */ #define STA_RONLY (STA_PPSSIGNAL | STA_PPSJITTER | STA_PPSWANDER | \ STA_PPSERROR | STA_CLOCKERR | STA_NANO | STA_MODE | STA_CLK) /* * Clock states (ntptimeval.time_state) */ #define TIME_OK 0 /* no leap second warning */ #define TIME_INS 1 /* insert leap second warning */ #define TIME_DEL 2 /* delete leap second warning */ #define TIME_OOP 3 /* leap second in progress */ #define TIME_WAIT 4 /* leap second has occurred */ #define TIME_ERROR 5 /* error (see status word) */ /* * NTP user interface -- ntp_gettime(2) - used to read kernel clock values */ struct ntptimeval { struct timespec time; /* current time (ns) (ro) */ long maxerror; /* maximum error (us) (ro) */ long esterror; /* estimated error (us) (ro) */ long tai; /* TAI offset */ int time_state; /* time status */ }; /* * NTP daemon interface -- ntp_adjtime(2) -- used to discipline CPU clock * oscillator and control/determine status. * * Note: The offset, precision and jitter members are in microseconds if * STA_NANO is zero and nanoseconds if not. */ struct timex { unsigned int modes; /* clock mode bits (wo) */ long offset; /* time offset (ns/us) (rw) */ long freq; /* frequency offset (scaled PPM) (rw) */ long maxerror; /* maximum error (us) (rw) */ long esterror; /* estimated error (us) (rw) */ int status; /* clock status bits (rw) */ long constant; /* poll interval (log2 s) (rw) */ long precision; /* clock precision (ns/us) (ro) */ long tolerance; /* clock frequency tolerance (scaled * PPM) (ro) */ /* * The following read-only structure members are implemented * only if the PPS signal discipline is configured in the * kernel. They are included in all configurations to insure * portability. */ long ppsfreq; /* PPS frequency (scaled PPM) (ro) */ long jitter; /* PPS jitter (ns/us) (ro) */ int shift; /* interval duration (s) (shift) (ro) */ long stabil; /* PPS stability (scaled PPM) (ro) */ long jitcnt; /* jitter limit exceeded (ro) */ long calcnt; /* calibration intervals (ro) */ long errcnt; /* calibration errors (ro) */ long stbcnt; /* stability limit exceeded (ro) */ }; #ifdef __FreeBSD__ #ifdef _KERNEL void ntp_update_second(int64_t *adjustment, time_t *newsec, long *tai_off); #else /* !_KERNEL */ #include <sys/cdefs.h> __BEGIN_DECLS int ntp_adjtime(struct timex *); int ntp_gettime(struct ntptimeval *); __END_DECLS #endif /* _KERNEL */ #endif /* __FreeBSD__ */ #endif /* !_SYS_TIMEX_H_ */
