Comments and/or "ok to commit" welcome.  Thanks!

+#define AUDIO_SET_SWINTR softintr_schedule(sc->sc_sicookie)

"yuck"  don't use local variables in macros.  same here:

+#define FD_SET_SWINTR softintr_schedule(fdc->sc_sicookie)       


make softintr_priority() an inline function or macro?  seems a waste of a
function call ...


i think the magma driver needs to be tested before this is commited, as well.


.mrg.