CSR_FH_INT_STATUS
rfh = IWH_READ(sc, CSR_FH_INT_STATUS);
IWH_WRITE(sc, CSR_FH_INT_STATUS, rfh);
IWH_WRITE(sc, CSR_FH_INT_STATUS, 0xffffffff);
rfh = IWK_READ(sc, CSR_FH_INT_STATUS);
IWK_WRITE(sc, CSR_FH_INT_STATUS, rfh);
IWK_WRITE(sc, CSR_FH_INT_STATUS, 0xffffffff);
rfh = IWP_READ(sc, CSR_FH_INT_STATUS);
IWP_WRITE(sc, CSR_FH_INT_STATUS, rfh);
IWP_WRITE(sc, CSR_FH_INT_STATUS, 0xffffffff);