ASC_IOADR_GAP
if (bus_space_map(iot, iobase, ASC_IOADR_GAP,
bus_space_unmap(iot, ioh, ASC_IOADR_GAP);
if (bus_space_map(iot, iobase, ASC_IOADR_GAP, 0, &ioh))
bus_space_unmap(iot, ioh, ASC_IOADR_GAP);
ia->ia_io[0].ir_size = ASC_IOADR_GAP;
bus_space_unmap(iot, ioh, ASC_IOADR_GAP);
if (bus_space_map(iot, ia->ia_io[0].ir_addr, ASC_IOADR_GAP, 0, &ioh)) {