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authorBob Picco <bob.picco@hp.com>2007-07-18 15:51:28 -0700
committerTony Luck <tony.luck@intel.com>2007-07-20 11:23:02 -0700
commit1f564ad6d4182859612cbae452122e5eb2d62a76 (patch)
treeef98ce12ed64853437c35a81e29f0d1c09a4393b /include/linux/timex.h
parent0aa366f351d044703e25c8425e508170e80d83b1 (diff)
[IA64] remove time interpolator
Remove time_interpolator code (This is generic code, but only user was ia64. It has been superseded by the CONFIG_GENERIC_TIME code). Signed-off-by: Bob Picco <bob.picco@hp.com> Signed-off-by: John Stultz <johnstul@us.ibm.com> Signed-off-by: Peter Keilty <peter.keilty@hp.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'include/linux/timex.h')
-rw-r--r--include/linux/timex.h60
1 files changed, 0 insertions, 60 deletions
diff --git a/include/linux/timex.h b/include/linux/timex.h
index da929dbbea2a..37ac3ff90faf 100644
--- a/include/linux/timex.h
+++ b/include/linux/timex.h
@@ -224,66 +224,6 @@ static inline int ntp_synced(void)
__x < 0 ? -(-__x >> __s) : __x >> __s; \
})
-
-#ifdef CONFIG_TIME_INTERPOLATION
-
-#define TIME_SOURCE_CPU 0
-#define TIME_SOURCE_MMIO64 1
-#define TIME_SOURCE_MMIO32 2
-#define TIME_SOURCE_FUNCTION 3
-
-/* For proper operations time_interpolator clocks must run slightly slower
- * than the standard clock since the interpolator may only correct by having
- * time jump forward during a tick. A slower clock is usually a side effect
- * of the integer divide of the nanoseconds in a second by the frequency.
- * The accuracy of the division can be increased by specifying a shift.
- * However, this may cause the clock not to be slow enough.
- * The interpolator will self-tune the clock by slowing down if no
- * resets occur or speeding up if the time jumps per analysis cycle
- * become too high.
- *
- * Setting jitter compensates for a fluctuating timesource by comparing
- * to the last value read from the timesource to insure that an earlier value
- * is not returned by a later call. The price to pay
- * for the compensation is that the timer routines are not as scalable anymore.
- */
-
-struct time_interpolator {
- u16 source; /* time source flags */
- u8 shift; /* increases accuracy of multiply by shifting. */
- /* Note that bits may be lost if shift is set too high */
- u8 jitter; /* if set compensate for fluctuations */
- u32 nsec_per_cyc; /* set by register_time_interpolator() */
- void *addr; /* address of counter or function */
- cycles_t mask; /* mask the valid bits of the counter */
- unsigned long offset; /* nsec offset at last update of interpolator */
- u64 last_counter; /* counter value in units of the counter at last update */
- cycles_t last_cycle; /* Last timer value if TIME_SOURCE_JITTER is set */
- u64 frequency; /* frequency in counts/second */
- long drift; /* drift in parts-per-million (or -1) */
- unsigned long skips; /* skips forward */
- unsigned long ns_skipped; /* nanoseconds skipped */
- struct time_interpolator *next;
-};
-
-extern void register_time_interpolator(struct time_interpolator *);
-extern void unregister_time_interpolator(struct time_interpolator *);
-extern void time_interpolator_reset(void);
-extern unsigned long time_interpolator_get_offset(void);
-extern void time_interpolator_update(long delta_nsec);
-
-#else /* !CONFIG_TIME_INTERPOLATION */
-
-static inline void time_interpolator_reset(void)
-{
-}
-
-static inline void time_interpolator_update(long delta_nsec)
-{
-}
-
-#endif /* !CONFIG_TIME_INTERPOLATION */
-
#define TICK_LENGTH_SHIFT 32
#ifdef CONFIG_NO_HZ