X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=include%2Flinux%2Ftimex.h;h=d543d3871e3867d91ff7b5b93497927a00071332;hb=16c70f8c1b54b61c3b951b6fb220df250fe09b32;hp=b54c288dd6b8324fcb2c092b3cc52bf18734c2f8;hpb=6a77f38946aaee1cd85eeec6cf4229b204c15071;p=linux-2.6.git

diff --git a/include/linux/timex.h b/include/linux/timex.h
index b54c288dd..d543d3871 100644
--- a/include/linux/timex.h
+++ b/include/linux/timex.h
@@ -53,12 +53,10 @@
 #ifndef _LINUX_TIMEX_H
 #define _LINUX_TIMEX_H
 
-#include <linux/config.h>
 #include <linux/compiler.h>
 #include <linux/time.h>
 
 #include <asm/param.h>
-#include <asm/timex.h>
 
 /*
  * SHIFT_KG and SHIFT_KF establish the damping of the PLL and are chosen
@@ -97,37 +95,10 @@
 
 #define MAXPHASE 512000L        /* max phase error (us) */
 #define MAXFREQ (512L << SHIFT_USEC)  /* max frequency error (ppm) */
-#define MAXTIME (200L << PPS_AVG) /* max PPS error (jitter) (200 us) */
 #define MINSEC 16L              /* min interval between updates (s) */
 #define MAXSEC 1200L            /* max interval between updates (s) */
 #define	NTP_PHASE_LIMIT	(MAXPHASE << 5)	/* beyond max. dispersion */
 
-/*
- * The following defines are used only if a pulse-per-second (PPS)
- * signal is available and connected via a modem control lead, such as
- * produced by the optional ppsclock feature incorporated in the Sun
- * asynch driver. They establish the design parameters of the frequency-
- * lock loop used to discipline the CPU clock oscillator to the PPS
- * signal.
- *
- * PPS_AVG is the averaging factor for the frequency loop, as well as
- * the time and frequency dispersion.
- *
- * PPS_SHIFT and PPS_SHIFTMAX specify the minimum and maximum
- * calibration intervals, respectively, in seconds as a power of two.
- *
- * PPS_VALID is the maximum interval before the PPS signal is considered
- * invalid and protocol updates used directly instead.
- *
- * MAXGLITCH is the maximum interval before a time offset of more than
- * MAXTIME is believed.
- */
-#define PPS_AVG 2		/* pps averaging constant (shift) */
-#define PPS_SHIFT 2		/* min interval duration (s) (shift) */
-#define PPS_SHIFTMAX 8		/* max interval duration (s) (shift) */
-#define PPS_VALID 120		/* pps signal watchdog max (s) */
-#define MAXGLITCH 30		/* pps signal glitch max (s) */
-
 /*
  * syscall interface - used (mainly by NTP daemon)
  * to discipline kernel clock oscillator
@@ -219,6 +190,8 @@ struct timex {
 #define TIME_BAD	TIME_ERROR /* bw compat */
 
 #ifdef __KERNEL__
+#include <asm/timex.h>
+
 /*
  * kernel variables
  * Note: maximum error = NTP synch distance = dispersion + delay / 2;
@@ -240,27 +213,41 @@ extern long time_precision;	/* clock precision (us) */
 extern long time_maxerror;	/* maximum error */
 extern long time_esterror;	/* estimated error */
 
-extern long time_phase;		/* phase offset (scaled us) */
 extern long time_freq;		/* frequency offset (scaled ppm) */
-extern long time_adj;		/* tick adjust (scaled 1 / HZ) */
 extern long time_reftime;	/* time at last adjustment (s) */
 
 extern long time_adjust;	/* The amount of adjtime left */
 extern long time_next_adjust;	/* Value for time_adjust at next tick */
 
-/* interface variables pps->timer interrupt */
-extern long pps_offset;		/* pps time offset (us) */
-extern long pps_jitter;		/* time dispersion (jitter) (us) */
-extern long pps_freq;		/* frequency offset (scaled ppm) */
-extern long pps_stabil;		/* frequency dispersion (scaled ppm) */
-extern long pps_valid;		/* pps signal watchdog counter */
+/**
+ * ntp_clear - Clears the NTP state variables
+ *
+ * Must be called while holding a write on the xtime_lock
+ */
+static inline void ntp_clear(void)
+{
+	time_adjust = 0;		/* stop active adjtime() */
+	time_status |= STA_UNSYNC;
+	time_maxerror = NTP_PHASE_LIMIT;
+	time_esterror = NTP_PHASE_LIMIT;
+}
+
+/**
+ * ntp_synced - Returns 1 if the NTP status is not UNSYNC
+ *
+ */
+static inline int ntp_synced(void)
+{
+	return !(time_status & STA_UNSYNC);
+}
+
+/* Required to safely shift negative values */
+#define shift_right(x, s) ({	\
+	__typeof__(x) __x = (x);	\
+	__typeof__(s) __s = (s);	\
+	__x < 0 ? -(-__x >> __s) : __x >> __s;	\
+})
 
-/* interface variables pps->adjtimex */
-extern int pps_shift;		/* interval duration (s) (shift) */
-extern long pps_jitcnt;		/* jitter limit exceeded */
-extern long pps_calcnt;		/* calibration intervals */
-extern long pps_errcnt;		/* calibration errors */
-extern long pps_stbcnt;		/* stability limit exceeded */
 
 #ifdef CONFIG_TIME_INTERPOLATION
 
@@ -317,6 +304,13 @@ time_interpolator_reset(void)
 
 #endif /* !CONFIG_TIME_INTERPOLATION */
 
+#define TICK_LENGTH_SHIFT	32
+
+/* Returns how long ticks are at present, in ns / 2^(SHIFT_SCALE-10). */
+extern u64 current_tick_length(void);
+
+extern int do_adjtimex(struct timex *);
+
 #endif /* KERNEL */
 
 #endif /* LINUX_TIMEX_H */