vh_memt
vh->vh_memt = memt;
if (bus_space_map(vh->vh_memt, 0xa0000, 0x20000, 0, &vh->vh_allmemh))
if (bus_space_subregion(vh->vh_memt, vh->vh_allmemh,
bus_space_read_region_2(vh->vh_memt, vh->vh_memh,
bus_space_write_region_2(vh->vh_memt, vh->vh_memh,
bus_space_write_1(vh->vh_memt, vh->vh_allmemh,
bus_space_read_region_2(vh->vh_memt, vh->vh_memh,
bus_space_write_region_2(vh->vh_memt, vh->vh_memh,