On Thu, 14 Sep 2000 [EMAIL PROTECTED] wrote:
> > service several interrupts. Quite common case when using some kind of
> > wrappers, etc. Having "device id" is a requirement. It was not present in
> > Linux initially, but soon people understood its usefulness.
>
>
> low_level_handler_installed_by_request_irq:
> general_handler(devname);
> return;
>
> Is that a problem?
Yes. In low_level_handler_installed_by_request_irq I have no way to get
devname. We are talking about fully dynamic situations. Like I have two
identical cards, I want to use the same driver. At compile time I do not know
if I will install 1 or 5 interrupt handlers and for which devices. I also do
not know the names at compile time.
Or should I use:
switch(irq) {
case 5:
install low_level_handler_5;
break;
case 7:
install low_level_handler_7;
etc...
} ?
Solution I would use now is to reproduce Linux 1.2 with an array of 16 "irq
structures". I get IRQ number from some register as you have suggested, and
get all other data from my table indexed by IRQ.
Best regards,
--
Tomek
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