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| author | Mike Karels <karels@FreeBSD.org> | 2018-01-03 00:56:30 +0000 |
|---|---|---|
| committer | Mike Karels <karels@FreeBSD.org> | 2018-01-03 00:56:30 +0000 |
| commit | d626b50b9db1f1fea4d0bf3668a05f8198fe83dd (patch) | |
| tree | b9fd9c0fe54ca6c9c718b074f688b2759717bc16 /sys/kern/kern_clock.c | |
| parent | f68e716ffe4b6edcb66df7e6e44ad8bde817417b (diff) | |
| download | src-test2-d626b50b9db1f1fea4d0bf3668a05f8198fe83dd.tar.gz src-test2-d626b50b9db1f1fea4d0bf3668a05f8198fe83dd.zip | |
Notes
Diffstat (limited to 'sys/kern/kern_clock.c')
| -rw-r--r-- | sys/kern/kern_clock.c | 26 |
1 files changed, 13 insertions, 13 deletions
diff --git a/sys/kern/kern_clock.c b/sys/kern/kern_clock.c index 509885d2cd62..d9b090d960b3 100644 --- a/sys/kern/kern_clock.c +++ b/sys/kern/kern_clock.c @@ -335,14 +335,18 @@ read_cpu_time(long *cp_time) } } -#ifdef SW_WATCHDOG #include <sys/watchdog.h> static int watchdog_ticks; static int watchdog_enabled; static void watchdog_fire(void); static void watchdog_config(void *, u_int, int *); -#endif /* SW_WATCHDOG */ + +static void +watchdog_attach(void) +{ + EVENTHANDLER_REGISTER(watchdog_list, watchdog_config, NULL, 0); +} /* * Clock handling routines. @@ -410,8 +414,14 @@ initclocks(void *dummy) if (profhz == 0) profhz = i; psratio = profhz / i; + #ifdef SW_WATCHDOG - EVENTHANDLER_REGISTER(watchdog_list, watchdog_config, NULL, 0); + /* Enable hardclock watchdog now, even if a hardware watchdog exists. */ + watchdog_attach(); +#else + /* Volunteer to run a software watchdog. */ + if (wdog_software_attach == NULL) + wdog_software_attach = watchdog_attach; #endif } @@ -482,10 +492,8 @@ hardclock(int usermode, uintfptr_t pc) #ifdef DEVICE_POLLING hardclock_device_poll(); /* this is very short and quick */ #endif /* DEVICE_POLLING */ -#ifdef SW_WATCHDOG if (watchdog_enabled > 0 && --watchdog_ticks <= 0) watchdog_fire(); -#endif /* SW_WATCHDOG */ } void @@ -496,9 +504,7 @@ hardclock_cnt(int cnt, int usermode) struct proc *p = td->td_proc; int *t = DPCPU_PTR(pcputicks); int flags, global, newticks; -#ifdef SW_WATCHDOG int i; -#endif /* SW_WATCHDOG */ /* * Update per-CPU and possibly global ticks values. @@ -558,13 +564,11 @@ hardclock_cnt(int cnt, int usermode) atomic_store_rel_int(&devpoll_run, 0); } #endif /* DEVICE_POLLING */ -#ifdef SW_WATCHDOG if (watchdog_enabled > 0) { i = atomic_fetchadd_int(&watchdog_ticks, -newticks); if (i > 0 && i <= newticks) watchdog_fire(); } -#endif /* SW_WATCHDOG */ } if (curcpu == CPU_FIRST()) cpu_tick_calibration(); @@ -841,8 +845,6 @@ SYSCTL_PROC(_kern, KERN_CLOCKRATE, clockrate, 0, 0, sysctl_kern_clockrate, "S,clockinfo", "Rate and period of various kernel clocks"); -#ifdef SW_WATCHDOG - static void watchdog_config(void *unused __unused, u_int cmd, int *error) { @@ -891,5 +893,3 @@ watchdog_fire(void) panic("watchdog timeout"); #endif } - -#endif /* SW_WATCHDOG */ |