BUS_ADDR
bus_space_map(t, BUS_ADDR(slot, offset), sz, flags, hp)
bus_space_map(t, BUS_ADDR(slot, offset), sz, flags, hp)
(t, t0, BUS_ADDR(iospace, paddr), size, flags, hp));
bus_space_map(t, BUS_ADDR(slot, offset), sz, flags, hp)