How kernel handle interrupts

[Shahbaz khan]

Hi Woody,

Check "do_IRQ()" in arch/x86/kernel/irq.c. It is responsible to handle
device specific interrupts, while ipi and timer interrupts are dealt
elsewhere.

Hope this helps.

BR,
Shahbaz Khan

On Thu, Dec 20, 2012 at 3:27 PM, Woody Wu <narkewoody at gmail.com> wrote:

> Hi, List
>
> Where is the Kernel code that handles external interrupts? I want to
> have a look at it but haven't found out where it is.
>
> Actually, I have some basic questions about interrupt handling in Linux.
> 1. After Kernel's ISR received an interrupt, I believe it will invoke a
>    handler defined in a device driver if any. But it should be the
>    device driver's responsibility or kernel ISR's responsibility to
>    clear (or acknowledge) the interrupt?
>
> 2. My device, an AX88796B network controller, asserting the interrupt
>    line in a level-triggered manner. Now I met problem with the device that
>    might caused by the CPU interrupt mode is not set as level-triggered by
>    edge trigger.  My CPU is Samsung S3C2410, an ARM920T powered one.  Does
>    anyone know usually where and how should I do this kind of setting?
>
>
> Thanks in advance.
>
> --
> woody
> I can't go back to yesterday - because I was a different person then.
>
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-- 
Shahbaz Khan
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