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authorLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-20 15:02:20 -0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-20 15:02:20 -0400
commitefa7e8673c78cc6de2d6c367eb6f50449c57ed90 (patch)
tree2759535bd50e6d6cc4801a02106ee26f27aa610f /include/linux
parent02d6112cd7d75bf30685ee4b2e9dc0291b4d3133 (diff)
parentbd807f9c5b90c236c3d173a5815d620bc1b1316d (diff)
Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6: [IA64] Prevent people from directly including <asm/rwsem.h>. [IA64] remove time interpolator [IA64] Convert to generic timekeeping/clocksource [IA64] refresh some config files for 64K pagesize [IA64] Delete iosapic_free_rte() [IA64] fallocate system call [IA64] Enable percpu vector domain for IA64_DIG [IA64] Enable percpu vector domain for IA64_GENERIC [IA64] Support irq migration across domain [IA64] Add support for vector domain [IA64] Add mapping table between irq and vector [IA64] Check if irq is sharable [IA64] Fix invalid irq vector assumption for iosapic [IA64] Use dynamic irq for iosapic interrupts [IA64] Use per iosapic lock for indirect iosapic register access [IA64] Cleanup lock order in iosapic_register_intr [IA64] Remove duplicated members in iosapic_rte_info [IA64] Remove block structure for locking in iosapic.c
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/clocksource.h6
-rw-r--r--include/linux/timex.h60
2 files changed, 6 insertions, 60 deletions
diff --git a/include/linux/clocksource.h b/include/linux/clocksource.h
index bf297b03a4e4..16ea3374dddf 100644
--- a/include/linux/clocksource.h
+++ b/include/linux/clocksource.h
@@ -67,6 +67,12 @@ struct clocksource {
67 unsigned long flags; 67 unsigned long flags;
68 cycle_t (*vread)(void); 68 cycle_t (*vread)(void);
69 void (*resume)(void); 69 void (*resume)(void);
70#ifdef CONFIG_IA64
71 void *fsys_mmio; /* used by fsyscall asm code */
72#define CLKSRC_FSYS_MMIO_SET(mmio, addr) ((mmio) = (addr))
73#else
74#define CLKSRC_FSYS_MMIO_SET(mmio, addr) do { } while (0)
75#endif
70 76
71 /* timekeeping specific data, ignore */ 77 /* timekeeping specific data, ignore */
72 cycle_t cycle_interval; 78 cycle_t cycle_interval;
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)
224 __x < 0 ? -(-__x >> __s) : __x >> __s; \ 224 __x < 0 ? -(-__x >> __s) : __x >> __s; \
225}) 225})
226 226
227
228#ifdef CONFIG_TIME_INTERPOLATION
229
230#define TIME_SOURCE_CPU 0
231#define TIME_SOURCE_MMIO64 1
232#define TIME_SOURCE_MMIO32 2
233#define TIME_SOURCE_FUNCTION 3
234
235/* For proper operations time_interpolator clocks must run slightly slower
236 * than the standard clock since the interpolator may only correct by having
237 * time jump forward during a tick. A slower clock is usually a side effect
238 * of the integer divide of the nanoseconds in a second by the frequency.
239 * The accuracy of the division can be increased by specifying a shift.
240 * However, this may cause the clock not to be slow enough.
241 * The interpolator will self-tune the clock by slowing down if no
242 * resets occur or speeding up if the time jumps per analysis cycle
243 * become too high.
244 *
245 * Setting jitter compensates for a fluctuating timesource by comparing
246 * to the last value read from the timesource to insure that an earlier value
247 * is not returned by a later call. The price to pay
248 * for the compensation is that the timer routines are not as scalable anymore.
249 */
250
251struct time_interpolator {
252 u16 source; /* time source flags */
253 u8 shift; /* increases accuracy of multiply by shifting. */
254 /* Note that bits may be lost if shift is set too high */
255 u8 jitter; /* if set compensate for fluctuations */
256 u32 nsec_per_cyc; /* set by register_time_interpolator() */
257 void *addr; /* address of counter or function */
258 cycles_t mask; /* mask the valid bits of the counter */
259 unsigned long offset; /* nsec offset at last update of interpolator */
260 u64 last_counter; /* counter value in units of the counter at last update */
261 cycles_t last_cycle; /* Last timer value if TIME_SOURCE_JITTER is set */
262 u64 frequency; /* frequency in counts/second */
263 long drift; /* drift in parts-per-million (or -1) */
264 unsigned long skips; /* skips forward */
265 unsigned long ns_skipped; /* nanoseconds skipped */
266 struct time_interpolator *next;
267};
268
269extern void register_time_interpolator(struct time_interpolator *);
270extern void unregister_time_interpolator(struct time_interpolator *);
271extern void time_interpolator_reset(void);
272extern unsigned long time_interpolator_get_offset(void);
273extern void time_interpolator_update(long delta_nsec);
274
275#else /* !CONFIG_TIME_INTERPOLATION */
276
277static inline void time_interpolator_reset(void)
278{
279}
280
281static inline void time_interpolator_update(long delta_nsec)
282{
283}
284
285#endif /* !CONFIG_TIME_INTERPOLATION */
286
287#define TICK_LENGTH_SHIFT 32 227#define TICK_LENGTH_SHIFT 32
288 228
289#ifdef CONFIG_NO_HZ 229#ifdef CONFIG_NO_HZ