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author | phk <phk@FreeBSD.org> | 1999-03-11 15:09:51 +0000 |
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committer | phk <phk@FreeBSD.org> | 1999-03-11 15:09:51 +0000 |
commit | 1542a4a4974b31d78a2115e37a802c377265be93 (patch) | |
tree | 59c54f6ab6826395ea6c20a6d0d12cb2be4bc943 /sys/kern/kern_tc.c | |
parent | 9c47f49734c0ff3b3d666a5a7a2bb329444223f1 (diff) | |
download | FreeBSD-src-1542a4a4974b31d78a2115e37a802c377265be93.zip FreeBSD-src-1542a4a4974b31d78a2115e37a802c377265be93.tar.gz |
Make even more of the PPSAPI implementations generic.
FLL support in hardpps()
Various magic shuffles and improved comments
Style fixes from Bruce.
Diffstat (limited to 'sys/kern/kern_tc.c')
-rw-r--r-- | sys/kern/kern_tc.c | 199 |
1 files changed, 147 insertions, 52 deletions
diff --git a/sys/kern/kern_tc.c b/sys/kern/kern_tc.c index 1c536ee..da424e5 100644 --- a/sys/kern/kern_tc.c +++ b/sys/kern/kern_tc.c @@ -37,9 +37,11 @@ * SUCH DAMAGE. * * @(#)kern_clock.c 8.5 (Berkeley) 1/21/94 - * $Id: kern_clock.c,v 1.88 1999/02/19 19:34:49 luoqi Exp $ + * $Id: kern_clock.c,v 1.89 1999/03/08 12:35:58 phk Exp $ */ +#include "opt_ntp.h" + #include <sys/param.h> #include <sys/systm.h> #include <sys/dkstat.h> @@ -50,6 +52,7 @@ #include <sys/resourcevar.h> #include <sys/signalvar.h> #include <sys/timex.h> +#include <sys/timepps.h> #include <vm/vm.h> #include <sys/lock.h> #include <vm/pmap.h> @@ -509,11 +512,14 @@ tco_delta(struct timecounter *tc) } /* - * We have four functions for looking at the clock, two for microseconds - * and two for nanoseconds. For each there is fast but less precise - * version "get{nano|micro}time" which will return a time which is up - * to 1/HZ previous to the call, whereas the raw version "{nano|micro}time" - * will return a timestamp which is as precise as possible. + * We have eight functions for looking at the clock, four for + * microseconds and four for nanoseconds. For each there is fast + * but less precise version "get{nano|micro}[up]time" which will + * return a time which is up to 1/HZ previous to the call, whereas + * the raw version "{nano|micro}[up]time" will return a timestamp + * which is as precise as possible. The "up" variants return the + * time relative to system boot, these are well suited for time + * interval measurements. */ void @@ -583,29 +589,6 @@ nanotime(struct timespec *ts) } void -timecounter_timespec(unsigned count, struct timespec *ts) -{ - u_int64_t delta; - struct timecounter *tc; - - tc = (struct timecounter *)timecounter; - ts->tv_sec = tc->tc_offset_sec; - count -= tc->tc_offset_count; - count &= tc->tc_counter_mask; - delta = tc->tc_offset_nano; - delta += ((u_int64_t)count * tc->tc_scale_nano_f); - delta >>= 32; - delta += ((u_int64_t)count * tc->tc_scale_nano_i); - delta += boottime.tv_usec * 1000; - ts->tv_sec += boottime.tv_sec; - while (delta >= 1000000000) { - delta -= 1000000000; - ts->tv_sec++; - } - ts->tv_nsec = delta; -} - -void getmicrouptime(struct timeval *tvp) { struct timecounter *tc; @@ -805,8 +788,6 @@ tco_forward(int force) while (tc->tc_offset_nano >= 1000000000ULL << 32) { tc->tc_offset_nano -= 1000000000ULL << 32; tc->tc_offset_sec++; - tc->tc_frequency = tc->tc_tweak->tc_frequency; - tc->tc_adjustment = tc->tc_tweak->tc_adjustment; ntp_update_second(tc); /* XXX only needed if xntpd runs */ tco_setscales(tc); force++; @@ -832,35 +813,149 @@ tco_forward(int force) timecounter = tc; } -static int -sysctl_kern_timecounter_frequency SYSCTL_HANDLER_ARGS +SYSCTL_NODE(_kern, OID_AUTO, timecounter, CTLFLAG_RW, 0, ""); + +SYSCTL_INT(_kern_timecounter, KERN_ARGMAX, method, CTLFLAG_RW, &tco_method, 0, + "This variable determines the method used for updating timecounters. " + "If the default algorithm (0) fails with \"calcru negative...\" messages " + "try the alternate algorithm (1) which handles bad hardware better." + +); + + +int +pps_ioctl(u_long cmd, caddr_t data, struct pps_state *pps) { + pps_params_t *app; + pps_info_t *api; + + switch (cmd) { + case PPS_IOC_CREATE: + return (0); + case PPS_IOC_DESTROY: + return (0); + case PPS_IOC_SETPARAMS: + app = (pps_params_t *)data; + if (app->mode & ~pps->ppscap) + return (EINVAL); + pps->ppsparam = *app; + return (0); + case PPS_IOC_GETPARAMS: + app = (pps_params_t *)data; + *app = pps->ppsparam; + return (0); + case PPS_IOC_GETCAP: + *(int*)data = pps->ppscap; + return (0); + case PPS_IOC_FETCH: + api = (pps_info_t *)data; + pps->ppsinfo.current_mode = pps->ppsparam.mode; + *api = pps->ppsinfo; + return (0); + case PPS_IOC_WAIT: + return (EOPNOTSUPP); + default: + return (ENOTTY); + } +} - return (sysctl_handle_opaque(oidp, - &timecounter->tc_tweak->tc_frequency, - sizeof(timecounter->tc_tweak->tc_frequency), req)); +void +pps_init(struct pps_state *pps) +{ + pps->ppscap |= PPS_TSFMT_TSPEC; + if (pps->ppscap & PPS_CAPTUREASSERT) + pps->ppscap |= PPS_OFFSETASSERT; + if (pps->ppscap & PPS_CAPTURECLEAR) + pps->ppscap |= PPS_OFFSETCLEAR; +#ifdef PPS_SYNC + if (pps->ppscap & PPS_CAPTUREASSERT) + pps->ppscap |= PPS_HARDPPSONASSERT; + if (pps->ppscap & PPS_CAPTURECLEAR) + pps->ppscap |= PPS_HARDPPSONCLEAR; +#endif } -static int -sysctl_kern_timecounter_adjustment SYSCTL_HANDLER_ARGS +void +pps_event(struct pps_state *pps, struct timecounter *tc, unsigned count, int event) { + struct timespec ts, *tsp, *osp; + u_int64_t delta; + unsigned tcount, *pcount; + int foff, fhard; + pps_seq_t *pseq; + + /* Things would be easier with arrays... */ + if (event == PPS_CAPTUREASSERT) { + tsp = &pps->ppsinfo.assert_timestamp; + osp = &pps->ppsparam.assert_offset; + foff = pps->ppsparam.mode & PPS_OFFSETASSERT; + fhard = pps->ppsparam.mode & PPS_HARDPPSONASSERT; + pcount = &pps->ppscount[0]; + pseq = &pps->ppsinfo.assert_sequence; + } else { + tsp = &pps->ppsinfo.clear_timestamp; + osp = &pps->ppsparam.clear_offset; + foff = pps->ppsparam.mode & PPS_OFFSETCLEAR; + fhard = pps->ppsparam.mode & PPS_HARDPPSONCLEAR; + pcount = &pps->ppscount[1]; + pseq = &pps->ppsinfo.clear_sequence; + } - return (sysctl_handle_opaque(oidp, - &timecounter->tc_tweak->tc_adjustment, - sizeof(timecounter->tc_tweak->tc_adjustment), req)); -} + /* The timecounter changed: bail */ + if (!pps->ppstc || + pps->ppstc->tc_name != tc->tc_name || + tc->tc_name != timecounter->tc_name) { + pps->ppstc = tc; + *pcount = count; + return; + } -SYSCTL_NODE(_kern, OID_AUTO, timecounter, CTLFLAG_RW, 0, ""); + /* Now, make sure we have the right instance */ + tc = timecounter; -SYSCTL_INT(_kern_timecounter, KERN_ARGMAX, method, CTLFLAG_RW, &tco_method, 0, - "This variable determines the method used for updating timecounters. " - "If the default algorithm (0) fails with \"calcru negative...\" messages " - "try the alternate algorithm (1) which handles bad hardware better." + /* Nothing really happened */ + if (*pcount == count) + return; -); + *pcount = count; -SYSCTL_PROC(_kern_timecounter, OID_AUTO, frequency, CTLTYPE_INT | CTLFLAG_RW, - 0, sizeof(u_int), sysctl_kern_timecounter_frequency, "I", ""); + /* Convert the count to timespec */ + ts.tv_sec = tc->tc_offset_sec; + tcount = count - tc->tc_offset_count; + tcount &= tc->tc_counter_mask; + delta = tc->tc_offset_nano; + delta += ((u_int64_t)tcount * tc->tc_scale_nano_f); + delta >>= 32; + delta += ((u_int64_t)tcount * tc->tc_scale_nano_i); + delta += boottime.tv_usec * 1000; + ts.tv_sec += boottime.tv_sec; + while (delta >= 1000000000) { + delta -= 1000000000; + ts.tv_sec++; + } + ts.tv_nsec = delta; + + (*pseq)++; + *tsp = ts; + + if (foff) { + timespecadd(tsp, osp); + if (tsp->tv_nsec < 0) { + tsp->tv_nsec += 1000000000; + tsp->tv_sec -= 1; + } + } +#ifdef PPS_SYNC + if (fhard) { + /* magic, at its best... */ + tcount = count - pps->ppscount[2]; + pps->ppscount[2] = count; + tcount &= tc->tc_counter_mask; + delta = ((u_int64_t)tcount * tc->tc_tweak->tc_scale_nano_f); + delta >>= 32; + delta += ((u_int64_t)tcount * tc->tc_tweak->tc_scale_nano_i); + hardpps(tsp, delta); + } +#endif +} -SYSCTL_PROC(_kern_timecounter, OID_AUTO, adjustment, CTLTYPE_INT | CTLFLAG_RW, - 0, sizeof(int), sysctl_kern_timecounter_adjustment, "I", ""); |