[coreboot] IOAPIC Initialisation - How much do you have to do ??

Rudolf Marek r.marek at assembler.cz
Fri Jul 24 22:40:18 CEST 2009

Harrison, Jon (SELEX GALILEO, UK) napsal(a):
> Sooo. I've added MPtables and masked IRQ0 from boot but still get
> APIC error on CPU0:  40(40)

Hi, seems like I'm bit online ;)

Check if bit 7 on 48h

7 APIC FSB Fixed at Low DW

It changes how the APIC is delivered. Also if external bus is used, you will 
need to check the pin multiplexer/multifunction is setup correctly.

> Is there a kernel command line option that will turn on more verbose
> APIC output ?

Yes but not help apic=debug maybe


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