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
--
Shahbaz Khan
On Thu, Dec 20, 2012 at 3:27 PM, Woody Wu <narkewoody@xxxxxxxxx> 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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