Quelle timex.h Sprache: C

/*****************************************************************************
*                                                                           *
* Copyright (c) David L. Mills 1993                                         *
*                                                                           *
* 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.     *
*                                                                           *
*****************************************************************************/

/*
* Modification history timex.h
*
* 29 Dec 97 Russell King
* Moved CLOCK_TICK_RATE, CLOCK_TICK_FACTOR and FINETUNE to asm/timex.h
* for ARM machines
*
*  9 Jan 97    Adrian Sun
*      Shifted LATCH define to allow access to alpha machines.
*
* 26 Sep 94 David L. Mills
* Added defines for hybrid phase/frequency-lock loop.
*
* 19 Mar 94 David L. Mills
* Moved defines from kernel routines to header file and added new
* defines for PPS phase-lock loop.
*
* 20 Feb 94 David L. Mills
* Revised status codes and structures for external clock and PPS
* signal discipline.
*
* 28 Nov 93 David L. Mills
* Adjusted parameters to improve stability and increase poll
* interval.
*
* 17 Sep 93    David L. Mills
*      Created file $NTP/include/sys/timex.h
* 07 Oct 93    Torsten Duwe
*      Derived linux/timex.h
* 1995-08-13    Torsten Duwe
*      kernel PLL updated to 1994-12-13 specs (rfc-1589)
* 1997-08-30    Ulrich Windl
*      Added new constant NTP_PHASE_LIMIT
* 2004-08-12    Christoph Lameter
*      Reworked time interpolation logic
*/
#ifndef _UAPI_LINUX_TIMEX_H
#define _UAPI_LINUX_TIMEX_H

#include <linux/time.h>

#define NTP_API  4 /* NTP API version */

#ifndef __KERNEL__
/*
* syscall interface - used (mainly by NTP daemon)
* to discipline kernel clock oscillator
*/
struct timex {
unsigned int modes; /* mode selector */
__kernel_long_t offset; /* time offset (usec) */
__kernel_long_t freq; /* frequency offset (scaled ppm) */
__kernel_long_t maxerror;/* maximum error (usec) */
__kernel_long_t esterror;/* estimated error (usec) */
int status;  /* clock command/status */
__kernel_long_t constant;/* pll time constant */
__kernel_long_t precision;/* clock precision (usec) (read only) */
__kernel_long_t tolerance;/* clock frequency tolerance (ppm)
   * (read only)
   */
struct timeval time; /* (read only, except for ADJ_SETOFFSET) */
__kernel_long_t tick; /* (modified) usecs between clock ticks */

__kernel_long_t ppsfreq;/* pps frequency (scaled ppm) (ro) */
__kernel_long_t jitter; /* pps jitter (us) (ro) */
int shift;              /* interval duration (s) (shift) (ro) */
__kernel_long_t stabil;            /* pps stability (scaled ppm) (ro) */
__kernel_long_t jitcnt; /* jitter limit exceeded (ro) */
__kernel_long_t calcnt; /* calibration intervals (ro) */
__kernel_long_t errcnt; /* calibration errors (ro) */
__kernel_long_t stbcnt; /* stability limit exceeded (ro) */

int tai;  /* TAI offset (ro) */

int  :32; int  :32; int  :32; int  :32;
int  :32; int  :32; int  :32; int  :32;
int  :32; int  :32; int  :32;
};
#endif

struct __kernel_timex_timeval {
__kernel_time64_t       tv_sec;
long long  tv_usec;
};

struct __kernel_timex {
unsigned int modes; /* mode selector */
int :32;            /* pad */
long long offset; /* time offset (usec) */
long long freq; /* frequency offset (scaled ppm) */
long long maxerror;/* maximum error (usec) */
long long esterror;/* estimated error (usec) */
int status;  /* clock command/status */
int :32;            /* pad */
long long constant;/* pll time constant */
long long precision;/* clock precision (usec) (read only) */
long long tolerance;/* clock frequency tolerance (ppm)
   * (read only)
   */
struct __kernel_timex_timeval time; /* (read only, except for ADJ_SETOFFSET) */
long long tick; /* (modified) usecs between clock ticks */

long long ppsfreq;/* pps frequency (scaled ppm) (ro) */
long long jitter; /* pps jitter (us) (ro) */
int shift;              /* interval duration (s) (shift) (ro) */
int :32;            /* pad */
long long stabil;            /* pps stability (scaled ppm) (ro) */
long long jitcnt; /* jitter limit exceeded (ro) */
long long calcnt; /* calibration intervals (ro) */
long long errcnt; /* calibration errors (ro) */
long long stbcnt; /* stability limit exceeded (ro) */

int tai;  /* TAI offset (ro) */

int  :32; int  :32; int  :32; int  :32;
int  :32; int  :32; int  :32; int  :32;
int  :32; int  :32; int  :32;
};

/*
* 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_TAI   0x0080 /* set TAI offset */
#define ADJ_SETOFFSET  0x0100  /* add 'time' to current time */
#define ADJ_MICRO  0x1000 /* select microsecond resolution */
#define ADJ_NANO  0x2000 /* select nanosecond resolution */
#define ADJ_TICK  0x4000 /* tick value */

#ifndef __KERNEL__
#define ADJ_OFFSET_SINGLESHOT 0x8001 /* old-fashioned adjtime */
#define ADJ_OFFSET_SS_READ 0xa001 /* read-only adjtime */
#endif

/* NTP userland likes the MOD_ prefix better */
#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_TAI ADJ_TAI
#define MOD_MICRO ADJ_MICRO
#define MOD_NANO ADJ_NANO

/*
* 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_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) */

/* read-only bits */
#define STA_RONLY (STA_PPSSIGNAL | STA_PPSJITTER | STA_PPSWANDER | \
STA_PPSERROR | STA_CLOCKERR | STA_NANO | STA_MODE | STA_CLK)

/*
* 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 */

#endif /* _UAPI_LINUX_TIMEX_H */

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