2009/11/16 Jamie Lokier <ja...@shareable.org>: > Artyom Tarasenko wrote: >> I don't know, how the real sun4m reacts in the case where irq stays >> on, not being cleared. >> It can not be though that it would try to process irq for every next >> tick. The CPU must have some time to clear the pending irq, so it must >> be edge triggered too, at least in a way. > > In general, most CPUs have a "disable interrupts" flag which is set at > the same time as calling the irq handler.
I see. The handler has enough time to clear pending irq then. Maybe there is really no latch.
