On Mon, 16 Feb 2009 08:04:20 +1100
Benjamin Herrenschmidt wrote:
> > static void cpm2_cascade(unsigned int irq, struct irq_desc *desc)
> > {
> > int cascade_irq;
> >
> > while ((cascade_irq = cpm2_get_irq()) >= 0)
> > generic_handle_irq(cascade_irq);
> >
> > desc->chip->
> static void cpm2_cascade(unsigned int irq, struct irq_desc *desc)
> {
> int cascade_irq;
>
> while ((cascade_irq = cpm2_get_irq()) >= 0)
> generic_handle_irq(cascade_irq);
>
> desc->chip->eoi(irq);
> }
You can try doing an early EOI see that helps. Ie, stick it
Hi,
I'm programming a board with an MPC8555E on which an external chip can
raise low priority interrupts through the port C of the CPM2. Under
nominal conditions it generates few interrupts, but they take a
relatively long time to be processed.
I also use some CPM2 controllers in such a way that
