Re: 440 PCI adapter card interupt handling question

But Matt,

request_irq() is used to register the ISR with an irq#
between 0-12 (for the 440). However, the inbound
message interrupt is hardwire as you stated. How can I
use request_irq() to register hardwire interrupt
signal to the UIC? Or is there another kernel call to
handle such services?

Regards,
--Khai

--- Matt Porter <porter@cox.net> wrote:

On Thu, Jun 13, 2002 at 03:10:11PM -0700, Khai Trinh
wrote:

quoted

Our custom board is a IBM 440GP based pci slave
adapter card, we will configure it to use the

Simple

quoted

Message Passing Unit to allow interrupt generation

to

quoted

the 440 from the Host. My question are Where in

the

quoted

Linux kernel code can I initialize the 440 onboard
interrupt controller to enable this interrupt to
happen? And how do I register my interrupt

handling

quoted

routine to service inbound interrupt from the

Host?

You don't use the UICs to generate an outbound
message
interrupt so there is no "initialization".  There is
a
hardwired UIC interrupt generated by inbound message
interrupts.

Since you are talking about writing a basic Linux
device driver, I suggest you see one of the many
books on the topic to learn some of the basics.
request_irq(), for example, is explained with many
examples.

Regards,
--
Matt Porter
porter@cox.net
This is Linux Country. On a quiet night, you can
hear Windows reboot.

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