Re: Finding the interrupt vector of a given IRQ

[Mark Farnell <mark.farnell@xxxxxxxxx>]

This is for an assignment, where the student needs to write an
interrupt handler.

Since the OS is run on a virtual machine,  I need to find a way to
trigger the IRQ to let the students' interrupt handler to handle the
interrupt.





On Mon, May 28, 2012 at 9:27 AM, richard -rw- weinberger
<richard.weinberger@xxxxxxxxx> wrote:
> On Sun, May 27, 2012 at 2:02 AM, Mark Farnell <mark.farnell@xxxxxxxxx> wrote:
>> In the kernel, how can I find out the interrupt vector number of a
>> given IRQ (for example, IRQ7)?
>>
>> Within the kernel module, I would like to manually set the IRQ using
>> the assembly code:
>>
>> asm("int $<irq vector>");
>>
>> and let the IRQ handler installed by a different module catch that interrupt.
>>
>> Is this possible?
>
> No really because not all IRQ have an interrupt line to the CPU.
> Linux can multiplex and emulate them. Think of GPIO drivers with
> interrupt support.
> Anyway, why to you think you need to trigger the raw IRQ manually?
> This sounds really odd...
>
>
> --
> Thanks,
> //richard

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