softlevel1
extern uint_t softlevel1(caddr_t, caddr_t);
(void) add_avsoftintr((void *)&softlevel1_hdl, 1, softlevel1,
extern uint_t softlevel1();
siron1_inum = add_softintr(PIL_1, softlevel1, 0, SOFTINT_ST);
(softintrfunc)softlevel1, 0, SOFTINT_ST);
extern uint_t softlevel1();