RNG_STATUS
status = HREAD4(sc, RNG_STATUS);
status = HREAD4(sc, RNG_STATUS);
HWRITE4(sc, RNG_STATUS, 250000);
status = HREAD4(sc, RNG_STATUS);
HWRITE4(sc, RNG_STATUS, RNG_STATUS_SHUTDOWN);
HWRITE4(sc, RNG_STATUS, RNG_STATUS_READY);
if (HREAD4(sc, RNG_STATUS) & 0x1)