ENETC_PORT_RD4
val = ENETC_PORT_RD4(sc, ENETC_PCAPR0);
low = ENETC_PORT_RD4(sc, ENETC_PSIPMAR0(0));
bitmap = ENETC_PORT_RD4(sc, ENETC_PSIVHFR0(0));
bitmap |= (uint64_t)ENETC_PORT_RD4(sc, ENETC_PSIVHFR1(0)) << 32;
bitmap = ENETC_PORT_RD4(sc, ENETC_PSIVHFR0(0));
bitmap |= (uint64_t)ENETC_PORT_RD4(sc, ENETC_PSIVHFR1(0)) << 32;