Re: APIC errors and aic7xxx interrupts w/SMP on 2.3.25
Aaron Tiensivu (mojomofo@ctechnix.com)
Wed, 10 Nov 1999 15:20:12 -0500
> It won't do any good. There aren't any interrupt sources on the aic7xxx cards
> that my driver doesn't handle. Besides, in a later email on the list you see
> that when the machine is switched to MPS-1.1 mode, then the aic7xxx and uhci
> share the same interrupt and things work great, when in MPS-1.4 mode, then the
> aic7xxx and uhci have different interrupts, but I suspect that the uhci is
> still using the same interrupt as the aic7xxx (they are likely tied to the
> same pin) and as a result, the aic7xxx is seeing an interrupt storm and the
> uhci is seeing no interrupts and it's clear to me anyway that the source of
> the interrupt storm is the uhci hardware that is waiting for an interrupt
> handler to take care of it. I would write this one off as a buggy bios with a
> bad MPS-1.4 table.
This makes perfect sense because due to a bug in Award 4.51PG, when in MPS 1.4
mode, the USB port never gets assigned an IRQ in the table... I've got a dirty
hack in my kernel to force it to use IRQ 19 instead of not getting an IRQ
assigned. This is also why under Windows NT in MPS 1.4 mode, you cannot use
any USB devices (under Win2k I mean).
--
Which is worse, ignorance or apathy? Who knows? Who cares?
Do I ever cross your mind in the warm sunshine?
I'm certified Y2k complacent.
What would Charles Manson do?
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