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 <[email protected]> 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. > > _______________________________________________ > Kernelnewbies mailing list > [email protected] > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > -- Shahbaz Khan
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