[ixp1200] SA interrupt

[Abhijeet Joglekar]

Shyamal,

I havent tried this, so dont know if it works or is correct.

As you suggested, try adding an interface UE_REGISTER_CALLBACK to
the ue.o driver which will multiplex all the register requests into a
single UENG_MSG_INT (ueng.h file) interrupt. Then ue.o can register
its own callback with mask as the logical OR of all the masks
requested of it. When a UENG_MSG_INT is recd., the generic callback
of the ue.o driver will demultiplex the interrupt into one of the user
processes which registered interest for that interrupt. (this could
be based on the mask that the process specified when it registered
with the ue.o driver). You could simplify things a bit by NOT allowing
applications to have overlapping masks.

Then u could use a mechanism similar to what ue.o uses to call
"breakpoint callbacks" in rs_udebug, to call your user-level
callbacks. (polling and read ioctl operations on the driver)

-- abhijeet

On Sat, 22 Mar 2003, Shyamal Pandya wrote:

> Hi,
> I want to deliver an interrupt from the microengines to the Strong core
> processor of the IXP1200. The core runs Linux.
>
> After reading through the source code of the microengine driver, I figure
> that each time the microengines are initialized, the ue driver registers an
> interrupt handler with the linux kernel for a microengine interrupt. There
> is also a function uEng_intConnect, that can be used to register a handler
> function with this driver. (For example the debug library uses the function
> to register some function).
>
> But this function is not exported to the outside world. If it were, then one
> would do something like write a module stacked on the ue module and use the
> uEng_intConnect function to register its own handler function. I cannot
> avoid not using the ue driver because I am using the MicroACE framework.
>
> What can be done so that somehow I can catch a microengine interrupt on the
> core processor?
> I don't know if I have been quite clear, but I will appreciate any help.
> Thanks!
>
>
> --
> Shyamal Pandya
>
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>
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