summaryrefslogtreecommitdiff
path: root/ANDROID_3.4.5/include/linux/timex.h
diff options
context:
space:
mode:
authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/include/linux/timex.h
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
downloadFOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.gz
FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.bz2
FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.zip
Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/include/linux/timex.h')
-rw-r--r--ANDROID_3.4.5/include/linux/timex.h266
1 files changed, 0 insertions, 266 deletions
diff --git a/ANDROID_3.4.5/include/linux/timex.h b/ANDROID_3.4.5/include/linux/timex.h
deleted file mode 100644
index 99bc88b1..00000000
--- a/ANDROID_3.4.5/include/linux/timex.h
+++ /dev/null
@@ -1,266 +0,0 @@
-/*****************************************************************************
- * *
- * 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 */
- 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 */
-
-#ifdef __KERNEL__
-#define ADJ_ADJTIME 0x8000 /* switch between adjtime/adjtimex modes */
-#define ADJ_OFFSET_SINGLESHOT 0x0001 /* old-fashioned adjtime */
-#define ADJ_OFFSET_READONLY 0x2000 /* read-only adjtime */
-#else
-#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 */
-
-#ifdef __KERNEL__
-#include <linux/compiler.h>
-#include <linux/types.h>
-#include <linux/param.h>
-
-#include <asm/timex.h>
-
-/*
- * SHIFT_PLL is used as a dampening factor to define how much we
- * adjust the frequency correction for a given offset in PLL mode.
- * It also used in dampening the offset correction, to define how
- * much of the current value in time_offset we correct for each
- * second. Changing this value changes the stiffness of the ntp
- * adjustment code. A lower value makes it more flexible, reducing
- * NTP convergence time. A higher value makes it stiffer, increasing
- * convergence time, but making the clock more stable.
- *
- * In David Mills' nanokernel reference implementation SHIFT_PLL is 4.
- * However this seems to increase convergence time much too long.
- *
- * https://lists.ntp.org/pipermail/hackers/2008-January/003487.html
- *
- * In the above mailing list discussion, it seems the value of 4
- * was appropriate for other Unix systems with HZ=100, and that
- * SHIFT_PLL should be decreased as HZ increases. However, Linux's
- * clock steering implementation is HZ independent.
- *
- * Through experimentation, a SHIFT_PLL value of 2 was found to allow
- * for fast convergence (very similar to the NTPv3 code used prior to
- * v2.6.19), with good clock stability.
- *
- *
- * SHIFT_FLL is used as a dampening factor to define how much we
- * adjust the frequency correction for a given offset in FLL mode.
- * In David Mills' nanokernel reference implementation SHIFT_FLL is 2.
- *
- * MAXTC establishes the maximum time constant of the PLL.
- */
-#define SHIFT_PLL 2 /* PLL frequency factor (shift) */
-#define SHIFT_FLL 2 /* FLL frequency factor (shift) */
-#define MAXTC 10 /* maximum time constant (shift) */
-
-/*
- * SHIFT_USEC defines the scaling (shift) of the time_freq and
- * time_tolerance variables, which represent the current frequency
- * offset and maximum frequency tolerance.
- */
-#define SHIFT_USEC 16 /* frequency offset scale (shift) */
-#define PPM_SCALE ((s64)NSEC_PER_USEC << (NTP_SCALE_SHIFT - SHIFT_USEC))
-#define PPM_SCALE_INV_SHIFT 19
-#define PPM_SCALE_INV ((1LL << (PPM_SCALE_INV_SHIFT + NTP_SCALE_SHIFT)) / \
- PPM_SCALE + 1)
-
-#define MAXPHASE 500000000L /* max phase error (ns) */
-#define MAXFREQ 500000 /* max frequency error (ns/s) */
-#define MAXFREQ_SCALED ((s64)MAXFREQ << NTP_SCALE_SHIFT)
-#define MINSEC 256 /* min interval between updates (s) */
-#define MAXSEC 2048 /* max interval between updates (s) */
-#define NTP_PHASE_LIMIT ((MAXPHASE / NSEC_PER_USEC) << 5) /* beyond max. dispersion */
-
-/*
- * kernel variables
- * Note: maximum error = NTP synch distance = dispersion + delay / 2;
- * estimated error = NTP dispersion.
- */
-extern unsigned long tick_usec; /* USER_HZ period (usec) */
-extern unsigned long tick_nsec; /* ACTHZ period (nsec) */
-
-extern void ntp_init(void);
-extern void ntp_clear(void);
-
-/* 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; \
-})
-
-#define NTP_SCALE_SHIFT 32
-
-#define NTP_INTERVAL_FREQ (HZ)
-#define NTP_INTERVAL_LENGTH (NSEC_PER_SEC/NTP_INTERVAL_FREQ)
-
-/* Returns how long ticks are at present, in ns / 2^NTP_SCALE_SHIFT. */
-extern u64 ntp_tick_length(void);
-
-extern int second_overflow(unsigned long secs);
-extern int do_adjtimex(struct timex *);
-extern void hardpps(const struct timespec *, const struct timespec *);
-
-int read_current_timer(unsigned long *timer_val);
-
-/* The clock frequency of the i8253/i8254 PIT */
-#define PIT_TICK_RATE 1193182ul
-
-#endif /* KERNEL */
-
-#endif /* LINUX_TIMEX_H */