Local APIC on FreeBSD/i386

[John Baldwin]

On Wednesday 25 February 2004 08:41 am, Ralph S. wrote:
> Hmm..  I'm running FreeBSD-current (as of Feb 12, 04) and it does implement
> 'device apic' for UP systems... but onyl if the APIC has been enabled by
> the BIOS. (Maybe I'm just doing something wrong there, though. However,
> Intel's Katmai CPUs have an APIC built in, I'm sure of that.) I have tried
> to software-enable it, set up the base address and update  cpu_feature, but
> until now all I get is
>  boot -v telling me there is no APIC (before, it didn't mention even that
> though).

You have to have an I/O APIC to talk to the local APIC.  That is part of the 
motherboard chipset.

-- 
John Baldwin <jhb at FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =  http://www.FreeBSD.org