On Tue, Sep 27, 2005 at 11:37:50PM +0100, Alan Cox wrote:
> On Maw, 2005-09-27 at 17:26 -0400, Jeff Garzik wrote:
> > Grant Grundler wrote:
> > > I've no clue why folks thought it was better to ignore
> > > the IO APIC on UP kernels.
> >
> > Hysterical raisins: the -majority- of the early uniprocessor systems
> > that claimed IOAPIC support were broken.
>
> Not really broken in most cases, but since nobody was using the APIC
> board makers didn't bother wiring for it.
ok. Any clue how PCI IRQs got routed/handled on those boxes?
Did UP boards have an 8259 PIC and an IRQ line to the CPU?
Could an 8529 PIC even co-exist with an IO APIC?
Or was it something more silly like BIOS mfgs had no version
of Windows that could grok a IRQ routing table and thus no
incentive to enable that feature?
thanks,
grant
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
[Index of Archives]
[Kernel Newbies]
[Netfilter]
[Bugtraq]
[Photo]
[Gimp]
[Yosemite News]
[MIPS Linux]
[ARM Linux]
[Linux Security]
[Linux RAID]
[Video 4 Linux]
[Linux for the blind]
|
|