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Differential D47395

vt: add comments for KDMKTONE ioctl implementation
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Authored by emaste on Nov 1 2024, 4:29 PM.
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imp
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rG752c25c01c17: vt: add comments for KDMKTONE ioctl implementation
rGadba3c74209e: vt: add comments for KDMKTONE ioctl implementation
Summary

It appears we implemented the same KDMKTONE ioctl as Linux, which specifies the frequency as an 8254 PIT divisor for a 1.19MHz clock. Add a comment to vtterm_beep to avoid someone wanting to "fix" this in the future.

Also add an XXX comment that the period unit is supposed to be "timer ticks." Nothing in the base system uses this ioctl.

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rG FreeBSD src repository
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sys/
dev/
vt/
8 lines

Diff 145885

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sys/dev/vt/vt_core.c

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