BWI_STATE_HI
val = CSR_READ_4(sc, BWI_STATE_HI);
CSR_READ_4(mac->mac_sc, BWI_STATE_HI); /* dummy read */
state_hi = CSR_READ_4(sc, BWI_STATE_HI);
state_hi = CSR_READ_4(sc, BWI_STATE_HI);
CSR_WRITE_4(sc, BWI_STATE_HI, 0);