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/* Copyright (C) 1995, 1996, 1997, 1999, 2008 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#ifndef _SYS_TIMEX_H
#define _SYS_TIMEX_H 1
#include <features.h>
#include <sys/time.h>
#include <sys/types.h>
struct ntptimeval
{
struct timeval time; /* current time (ro) */
int32_t maxerror; /* maximum error (us) (ro) */
int32_t esterror; /* estimated error (us) (ro) */
};
#ifdef _SYSCALL32
# include <sys/types32.h>
struct ntptimeval32
{
struct timeval32 time;
int32_t maxerror;
int32_t esterror;
};
#endif
struct timex
{
uint32_t modes; /* mode selector */
int32_t offset; /* time offset (usec) */
int32_t freq; /* frequency offset (scaled ppm) */
int32_t maxerror; /* maximum error (usec) */
int32_t esterror; /* estimated error (usec) */
int32_t status; /* clock command/status */
int32_t constant; /* pll time constant */
int32_t precision; /* clock precision (usec) (read only) */
int32_t tolerance; /* clock frequency tolerance (ppm) (read only) */
int32_t ppsfreq; /* pps frequency (scaled ppm) (ro) */
int32_t jitter; /* pps jitter (us) (ro) */
int32_t shift; /* interval duration (s) (shift) (ro) */
int32_t stabil; /* pps stability (scaled ppm) (ro) */
int32_t jitcnt; /* jitter limit exceeded (ro) */
int32_t calcnt; /* calibration intervals (ro) */
int32_t errcnt; /* calibration errors (ro) */
int32_t stbcnt; /* stability limit exceeded (ro) */
};
/* Engineering parameters of the PLL. */
#define SCALE_KG (1<<6)
#define SCALE_KF (1<<16)
#define SCALE_KH (1<<2)
#define MAXTC (1<<6)
/* PLL variables. */
#define SCALE_PHASE (1<<22)
#define SCALE_USEC (1<<16)
#define SCALE_UPDATE (SCALE_KG * MAXTC)
#define FINEUSEC (1<<22)
/* Performance envelope of the PLL. */
#define MAXPHASE 512000
#define MAXFREQ (512 * SCALE_USEC)
#define MAXTIME (200 << PPS_AVG)
#define MINSEC 16
#define MAXSEC 1200
/* Used if pulse-per-second (PPS) is present. */
#define PPS_AVG 2
#define PPS_SHIFT 2
#define PPS_SHIFTMAX 8
#define PPS_VALID 120
#define MAXGLITCH 30
/* Mode codes (timex.mode) */
#define ADJ_OFFSET 0x0001 /* time offset */
#define ADJ_FREQUENCY 0x0002 /* frequency offset */
#define ADJ_MAXERROR 0x0004 /* maximum time error */
#define ADJ_ESTERROR 0x0008 /* estimated time error */
#define ADJ_STATUS 0x0010 /* clock status */
#define ADJ_TIMECONST 0x0020 /* pll time constant */
#define ADJ_TICK 0x4000 /* tick value */
#define ADJ_OFFSET_SINGLESHOT 0x8000 /* old-fashioned adjtime */
/* xntp 3.4 compatibility names */
#define MOD_OFFSET ADJ_OFFSET
#define MOD_FREQUENCY ADJ_FREQUENCY
#define MOD_MAXERROR ADJ_MAXERROR
#define MOD_ESTERROR ADJ_ESTERROR
#define MOD_STATUS ADJ_STATUS
#define MOD_TIMECONST ADJ_TIMECONST
#define MOD_CLKB ADJ_TICK
#define MOD_CLKA ADJ_OFFSET_SINGLESHOT /* 0x8000 in original */
/* 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 /* select frequency-lock 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_RONLY (STA_PPSSIGNAL | STA_PPSJITTER | STA_PPSWANDER | \
STA_PPSERROR | STA_CLOCKERR) /* read-only bits */
/* Clock states (time_state) */
#define TIME_OK 0 /* clock synchronized, no leap second */
#define TIME_INS 1 /* insert leap second */
#define TIME_DEL 2 /* delete leap second */
#define TIME_OOP 3 /* leap second in progress */
#define TIME_WAIT 4 /* leap second has occurred */
#define TIME_ERROR 5 /* clock not synchronized */
#define TIME_BAD TIME_ERROR /* bw compat */
/* Maximum time constant of the PLL. */
#define MAXTC 6
__BEGIN_DECLS
extern int __adjtimex (struct timex *__ntx) __THROW;
extern int adjtimex (struct timex *__ntx) __THROW;
extern int ntp_gettime (struct ntptimeval *__ntv) __THROW;
extern int ntp_adjtime (struct timex *__tntx) __THROW;
__END_DECLS
#endif /* sys/timex.h */
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