--- /dev/null
+/*****************************************************************************
+ * *
+ * 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 _LINUX_TIMEX_H
+#define _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 */
+ __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;
+};
+
+/*
+ * 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 */
+
+#define ADJ_OFFSET_SINGLESHOT 0x8001 /* old-fashioned adjtime */
+#define ADJ_OFFSET_SS_READ 0xa001 /* read-only adjtime */
+
+/* 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 /* _LINUX_TIMEX_H */
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