GM_PAR_MIB_CLR
GMAC_WRITE_2(sc, sc_if->msk_port, GM_PHY_ADDR, gmac | GM_PAR_MIB_CLR);
gmac &= ~GM_PAR_MIB_CLR;
GMAC_WRITE_2(sc, sc_if->msk_port, GM_PHY_ADDR, gmac | GM_PAR_MIB_CLR);
gmac &= ~GM_PAR_MIB_CLR;