From mboxrd@z Thu Jan  1 00:00:00 1970
From: narkewoody@gmail.com (Woody Wu)
Date: Fri, 21 Dec 2012 08:37:22 +0800
Subject: How kernel handle interrupts
In-Reply-To: <CAN3nT1RDSD4cweOrXEAh4T+u8SSoNqUVLGAosFGzZq4kcs_UHQ@mail.gmail.com>
References: <20121220142745.GB3578@zuhnb712>
	<CAN3nT1RDSD4cweOrXEAh4T+u8SSoNqUVLGAosFGzZq4kcs_UHQ@mail.gmail.com>
Message-ID: <20121221003722.GA9702@zuhnb712>
To: kernelnewbies@lists.kernelnewbies.org
List-Id: kernelnewbies.lists.kernelnewbies.org

On Thu, Dec 20, 2012 at 07:16:34PM +0100, Shahbaz khan wrote:
> 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.
> 

Thanks. Maybe you also know what's the name of the same function for
ARM, which is actual arch I am working on.

> Hope this helps.
> 
> BR,
> Shahbaz Khan
> 
> On Thu, Dec 20, 2012 at 3:27 PM, Woody Wu <narkewoody@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.
> >
> > _______________________________________________
> > Kernelnewbies mailing list
> > Kernelnewbies at kernelnewbies.org
> > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
> >
> 
> 
> 
> -- 
> Shahbaz Khan

-- 
woody
I can't go back to yesterday - because I was a different person then.