On Mon, 23 Aug 1999, David E. Cross wrote:
> How are PCI interrupts routed in CURRENT/NewBus? For example almost all of
> my PCI devices are mapped to IRQ11. I understand this is "normal" in the PCI
> world, but how does the interrupt dispatch routine decide which ints to
> route where? I recently put a panic() in a intr routine of mine just to
> see the call stack, but all it showed has Xintr11 (which upon grepping the
> source found no matches, but a nm /kernel did find it?!?.
The bios informs the kernel what irq each device is mapped to and we build
a chain of interrupt handlers for each one. All the handlers registered
for a given irq are called when it fires.
--
Doug Rabson Mail: dfr@nlsystems.com
Nonlinear Systems Ltd. Phone: +44 181 442 9037
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