Valid interrupt vectors and the interrupt server

[Christian Mauderer]

----- Ursprüngliche Mail -----
> Von: "Chris Johns" <chrisj at rtems.org>
> An: "Christian Mauderer" <christian.mauderer at embedded-brains.de>, devel at rtems.org
> Gesendet: Sonntag, 18. Juni 2017 04:31:22
> Betreff: Re: Valid interrupt vectors and the interrupt server

> On 18/6/17 2:17 am, Christian Mauderer wrote:
>> Hello,
>> 
>> I had a problem recently, that the interrupt server (for example used in libbsd)
>> caused some odd behaviour on an ARM Cortex BSP. That was solved by the
>> following patch:
>> 
>> https://git.rtems.org/rtems/commit/?id=ce3ac00c
>> 
>> Just today Sichen Zhao had a similar problem on the BBB:
>> 
>> https://lists.rtems.org/pipermail/devel/2017-June/018158.html
>> 
>> I took a look and it seems that there are a lot of BSPs which don't check for
>> the valid interrupt vector range in their bsp_interrupt_vector_disable/enable
>> functions. Every one of them will most likely have a problems if someone tries
>> to use libbsd or the interrupt server.
> 
> I seem to be missing something. Is the interrupt server and libbsd attempting to
> use interrupts that are no valid for these board and this is causing a problem?
> 
> Chris

Hello Chris,

yes the interrupt server uses an pseudo interrupt on _every_ target:

https://git.rtems.org/rtems/tree/c/src/lib/libbsp/shared/src/irq-server.c?id=ae359a9df#n31

That has nothing to do with the libbsd. The only connection is that libbsd uses the interrupt server for some interrupt processing.

Kind regards

Christian
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