Symbol: SIO_LSR_RXDA
usr/src/uts/sun4u/io/rmc_comm.c
259
return ((status & SIO_LSR_RXDA) != 0 && !rmc_comm_faulty(rcs));
usr/src/uts/sun4u/lw2plus/io/lombus.c
500
return ((status & SIO_LSR_RXDA) != 0 && !sio_faulty(ssp));