Hi Olivier,
you wrote:
> The visual workstation includes a 8259 multiplexing floppy, serial and
> parallel which ends up as one irqline (and one vector only). I need
> to be able to fan out this unique vector into different virtual irqs,
> but that doesn't seems to be supported by
> arch/i386/kernel/irq.c:do_IRQ(). Is there an easy way to do that?
There is already support for it included. The virtual interrupts are
mapped to those the legacy devices would show. See the code in
./arch/i386/kernel/. So it is not visible at the upper level you are
looking for it.
Michael
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