ALC_INTR_STATUS
status = CSR_READ_4(sc, ALC_INTR_STATUS);
CSR_WRITE_4(sc, ALC_INTR_STATUS, INTR_DIS_INT);
status = CSR_READ_4(sc, ALC_INTR_STATUS);
CSR_WRITE_4(sc, ALC_INTR_STATUS, status | INTR_DIS_INT);
(CSR_READ_4(sc, ALC_INTR_STATUS) & ALC_INTRS) != 0) {
CSR_WRITE_4(sc, ALC_INTR_STATUS, 0);
CSR_WRITE_4(sc, ALC_INTR_STATUS, 0x7FFFFFFF);
CSR_WRITE_4(sc, ALC_INTR_STATUS, 0xFFFFFFFF);
CSR_WRITE_4(sc, ALC_INTR_STATUS, 0);
CSR_WRITE_4(sc, ALC_INTR_STATUS, 0xFFFFFFFF);
CSR_WRITE_4(sc, ALC_INTR_STATUS, 0xFFFFFFFF);