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