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3f31c649d1
This code is mostly taken from the 1.1 port (which was in turn taken from Dave Mills's kern.tar.Z example). A few significant differences: 1) ntp_gettime() is now a MIB variable rather than a system call. A few fiddles are done in libc to make it behave the same. 2) mono_time does not participate in the PLL adjustments. 3) A new interface has been defined (in <machine/clock.h>) for doing possibly machine-dependent things around the time of the clock update. This is used in Pentium kernels to disable interrupts, set `time', and reset the CPU cycle counter as quickly as possible to avoid jitter in microtime(). Measurements show an apparent resolution of a bit more than 8.14usec, which is reasonable given system-call overhead. |
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ic | ||
atrtc.c | ||
fd.c | ||
fdc.h | ||
fdreg.h | ||
kbdtables.h | ||
rtc.h | ||
sio.c | ||
sioreg.h | ||
syscons.c | ||
timerreg.h |