Jochen Kunz wrote:
> On Mon, 17 Jul 2006 21:22:35 +0200
> Jorge Acereda Maciá <jacereda@gmail.com> wrote:
> 
> 
>>OFW also provides interrupt handling.
> 
> How? AFAIK OFW provides interrupt mapping information via the properties
> of device nodes. But there is no generic interrupt interface. (E.g. OFW
> calls OS back if a device has signaled an interrupt or the like.) That
> is why port ofppc runs so slow. All OFW device drivers use polling.

Hmmm... I thought there was a proposal to allow setting interrupt 
callbacks, but I've been searching for it without success. So probably 
it doesn't exist :-)