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Add "legacy route" support to HPET driver. When enabled, this mode makes

Description

Add "legacy route" support to HPET driver. When enabled, this mode makes
HPET to steal IRQ0 from i8254 and IRQ8 from RTC timers. It can be suitable
for HPETs without FSB interrupts support, as it gives them two unshared
IRQs. It allows them to provide one per-CPU event timer on dual-CPU system,
that should be suitable for further tickless kernels.

To enable it, such lines may be added to /boot/loader.conf:
hint.atrtc.0.clock=0
hint.attimer.0.clock=0
hint.hpet.0.legacy_route=1

Details

Provenance
mavAuthored on Jun 22 2010, 7:42 PM
Parents
rG25eb1b8c15cd: Some style fixes for r209371.
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