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Diffstat (limited to 'include/uapi/linux/timex.h')
| -rw-r--r-- | include/uapi/linux/timex.h | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/include/uapi/linux/timex.h b/include/uapi/linux/timex.h new file mode 100644 index 000000000000..a7ea81f13711 --- /dev/null +++ b/include/uapi/linux/timex.h @@ -0,0 +1,166 @@ +/***************************************************************************** + * * + * 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 */ + +/* + * syscall interface - used (mainly by NTP daemon) + * to discipline kernel clock oscillator + */ +struct timex { + unsigned int modes; /* mode selector */ + long offset; /* time offset (usec) */ + long freq; /* frequency offset (scaled ppm) */ + long maxerror; /* maximum error (usec) */ + long esterror; /* estimated error (usec) */ + int status; /* clock command/status */ + long constant; /* pll time constant */ + long precision; /* clock precision (usec) (read only) */ + long tolerance; /* clock frequency tolerance (ppm) + * (read only) + */ + struct timeval time; /* (read only, except for ADJ_SETOFFSET) */ + long tick; /* (modified) usecs between clock ticks */ + + long ppsfreq; /* pps frequency (scaled ppm) (ro) */ + long jitter; /* pps jitter (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) */ + + 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 */ |