IOASIC_IMSK
imsk = bus_space_read_4(sc->sc_bst, sc->sc_bsh, IOASIC_IMSK);
bus_space_write_4(sc->sc_bst, sc->sc_bsh, IOASIC_IMSK, imsk);
imsk = bus_space_read_4(sc->sc_bst, sc->sc_bsh, IOASIC_IMSK);
bus_space_write_4(sc->sc_bst, sc->sc_bsh, IOASIC_IMSK, imsk);
imsk = bus_space_read_4(sc->sc_bst, sc->sc_bsh, IOASIC_IMSK);
bus_space_write_4(sc->sc_bst, sc->sc_bsh, IOASIC_IMSK, imsk);
imskp = (volatile u_int32_t *)(DEC_3000_300_IOASIC_ADDR + IOASIC_IMSK);
imskp = (volatile u_int32_t *)(DEC_3000_300_IOASIC_ADDR + IOASIC_IMSK);
(DEC_3000_300_IOASIC_ADDR + IOASIC_IMSK);
imskp = (volatile u_int32_t *)(DEC_3000_300_IOASIC_ADDR + IOASIC_IMSK);
*(volatile u_int *)(ioasic_base + IOASIC_IMSK) |=