VGE_CAMADDR
CSR_WRITE_1(sc, VGE_CAMADDR, VGE_CAMADDR_ENABLE);
CSR_WRITE_1(sc, VGE_CAMADDR, VGE_CAMADDR_ENABLE | VGE_CAMADDR_AVSEL);
CSR_WRITE_1(sc, VGE_CAMADDR, 0);
CSR_WRITE_1(sc, VGE_CAMADDR, VGE_CAMADDR_ENABLE | sc->sc_camidx);
CSR_WRITE_1(sc, VGE_CAMADDR, 0);