diff options
author | Joel Sherrill <joel.sherrill@oarcorp.com> | 2012-03-09 09:19:06 -0600 |
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committer | Joel Sherrill <joel.sherrill@oarcorp.com> | 2012-03-09 09:24:22 -0600 |
commit | fcce4d20184e7c34a1576c24acf333082af1cfa9 (patch) | |
tree | cd35059a237a6d780908bf7c8bd1252660d52f0f /freebsd/sys/timetc.h | |
parent | Remove generic in_cksum.h (diff) | |
download | rtems-libbsd-fcce4d20184e7c34a1576c24acf333082af1cfa9.tar.bz2 |
Add time support files from FreeBSD to build to resolve more symbols
+ Add multiple files
+ Add them to freebsd-to-rtems.py
+ Regenerate Makefile
Diffstat (limited to 'freebsd/sys/timetc.h')
-rw-r--r-- | freebsd/sys/timetc.h | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/freebsd/sys/timetc.h b/freebsd/sys/timetc.h new file mode 100644 index 00000000..6b1c9b91 --- /dev/null +++ b/freebsd/sys/timetc.h @@ -0,0 +1,78 @@ +/*- + * ---------------------------------------------------------------------------- + * "THE BEER-WARE LICENSE" (Revision 42): + * <phk@FreeBSD.ORG> wrote this file. As long as you retain this notice you + * can do whatever you want with this stuff. If we meet some day, and you think + * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp + * ---------------------------------------------------------------------------- + * + * $FreeBSD$ + */ + +#ifndef _SYS_TIMETC_HH_ +#define _SYS_TIMETC_HH_ + +#ifndef _KERNEL +#error "no user-serviceable parts inside" +#endif + +/*- + * `struct timecounter' is the interface between the hardware which implements + * a timecounter and the MI code which uses this to keep track of time. + * + * A timecounter is a binary counter which has two properties: + * * it runs at a fixed, known frequency. + * * it has sufficient bits to not roll over in less than approximately + * max(2 msec, 2/HZ seconds). (The value 2 here is really 1 + delta, + * for some indeterminate value of delta.) + */ + +struct timecounter; +typedef u_int timecounter_get_t(struct timecounter *); +typedef void timecounter_pps_t(struct timecounter *); + +struct timecounter { + timecounter_get_t *tc_get_timecount; + /* + * This function reads the counter. It is not required to + * mask any unimplemented bits out, as long as they are + * constant. + */ + timecounter_pps_t *tc_poll_pps; + /* + * This function is optional. It will be called whenever the + * timecounter is rewound, and is intended to check for PPS + * events. Normal hardware does not need it but timecounters + * which latch PPS in hardware (like sys/pci/xrpu.c) do. + */ + u_int tc_counter_mask; + /* This mask should mask off any unimplemented bits. */ + u_int64_t tc_frequency; + /* Frequency of the counter in Hz. */ + char *tc_name; + /* Name of the timecounter. */ + int tc_quality; + /* + * Used to determine if this timecounter is better than + * another timecounter higher means better. Negative + * means "only use at explicit request". + */ + + void *tc_priv; + /* Pointer to the timecounter's private parts. */ + struct timecounter *tc_next; + /* Pointer to the next timecounter. */ +}; + +extern struct timecounter *timecounter; + +u_int64_t tc_getfrequency(void); +void tc_init(struct timecounter *tc); +void tc_setclock(struct timespec *ts); +void tc_ticktock(void); + +#ifdef SYSCTL_DECL +SYSCTL_DECL(_kern_timecounter); +#endif + +#endif /* !_SYS_TIMETC_HH_ */ |