PS711X_UARTDR
(*(volatile uint32_t *)(clpscom_cnaddr + PS711X_UARTDR))
(*(volatile uint8_t *)(clpscom_cnaddr + PS711X_UARTDR) = val)
bus_space_read_4((sc)->sc_iot, (sc)->sc_ioh, PS711X_UARTDR)
bus_space_write_1((sc)->sc_iot, (sc)->sc_ioh, PS711X_UARTDR, (val))
bus_space_write_multi_1((sc)->sc_iot, (sc)->sc_ioh, PS711X_UARTDR, (val), (n))