UBARR
do { UBARR(sc); bus_space_write_1((sc)->sc_io_tag, (sc)->sc_io_hdl, (r), (x)); \
do { UBARR(sc); bus_space_write_2((sc)->sc_io_tag, (sc)->sc_io_hdl, (r), (x)); \
do { UBARR(sc); bus_space_write_4((sc)->sc_io_tag, (sc)->sc_io_hdl, (r), (x)); \
#define UREAD1(sc, r) (UBARR(sc), bus_space_read_1((sc)->sc_io_tag, (sc)->sc_io_hdl, (r)))
#define UREAD2(sc, r) (UBARR(sc), bus_space_read_2((sc)->sc_io_tag, (sc)->sc_io_hdl, (r)))
#define UREAD4(sc, r) (UBARR(sc), bus_space_read_4((sc)->sc_io_tag, (sc)->sc_io_hdl, (r)))