AGE_INTR_STATUS
status = CSR_READ_4(sc, AGE_INTR_STATUS);
CSR_WRITE_4(sc, AGE_INTR_STATUS, status | INTR_DIS_INT);
CSR_WRITE_4(sc, AGE_INTR_STATUS, 0);
CSR_WRITE_4(sc, AGE_INTR_STATUS, 0);
CSR_WRITE_4(sc, AGE_INTR_STATUS, 0xFFFFFFFF);