HardenedBSD src tree

Bruce Evans 2dafbfcbab Added calibration the i8254 and the i586 clocks agains the RTC at boot ... time. The results are currently ignored unless certain temporary options are used. Added sysctls to support reading and writing the clock frequency variables (not the frequencies themselves). Writing is supposed to atomically adjust all related variables. machdep.c: Fixed spelling of a function name in a comment so that I can log this message which should have been with the previous commit. Initialize `cpu_class' earlier so that it can be used in startrtclock() instead of in calibrate_cyclecounter() (which no longer exists). Removed range checking of `cpu'. It is always initialized to CPU_XXX so it is less likely to be out of bounds than most variables. clock.h: Removed I586_CYCLECTR(). Use rdtsc() instead. clock.c: TIMER_FREQ is now a variable timer_freq that defaults to the old value of TIMER_FREQ. #define'ing TIMER_FREQ should still work and may be the best way of setting the frequency. Calibration involves counting cycles while watching the RTC for one second. This gives values correct to within (a few ppm) + (the innaccuracy of the RTC) on my systems.		1996-05-01 08:39:02 +00:00
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release	Micro tweak for getting the Holographic shell message to stay on the	1996-05-01 03:31:08 +00:00
sbin	Default to udp if neither udp nor tcp is specified. The previous revision	1996-05-01 03:13:45 +00:00
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sys	Added calibration the i8254 and the i586 clocks agains the RTC at boot	1996-05-01 08:39:02 +00:00
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usr.sbin	Micro tweak for getting the Holographic shell message to stay on the	1996-05-01 03:31:08 +00:00
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