ENETC_PSIVHFR1
bitmap |= (uint64_t)ENETC_PORT_RD4(sc, ENETC_PSIVHFR1(0)) << 32;
ENETC_PORT_WR4(sc, ENETC_PSIVHFR1(0), bitmap >> 32);
bitmap |= (uint64_t)ENETC_PORT_RD4(sc, ENETC_PSIVHFR1(0)) << 32;
ENETC_PORT_WR4(sc, ENETC_PSIVHFR1(0), bitmap >> 32);