[okl4-developer] Enable / disable interrupts

[Geoffrey Lee]

On Thu, Jun 19, 2008 at 11:41:28AM +0200, Guillaume PETITJEAN wrote:
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> >> The interrupt is masked in the interrupt controller.  Once the
> >> user-level driver has finished processing the interrupt, it is
> >> reenabled with the InterruptControl() system call.  Most code
> >> would use the convenience functions located in
> >> libs/l4/include/interrupt.h though.
> >
> 
> My question was more related to other interrupts. If the driver
> manages several interrupts I have first to disable all these
> interrupts, not only the current one, right ?

If another interrupt is received in the meantime they are marked
as pending in the kernel.  They will be delivered once driver
thread indicates to the kernel that it is ready to receive
another interrupt.  User-level drivers in OKL4 never explicitly 
masks interrupts.  Interrupts are only masked as a result of 
an interrupt being raised, and is unmasked once it has been
handled.

	-gl

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