EMAC_RX_FRM_FLT
writel(0, ioaddr + EMAC_RX_FRM_FLT);
if (!(readl(ioaddr + EMAC_RX_FRM_FLT) & EMAC_FRM_FLT_RXALL))
writel(v, ioaddr + EMAC_RX_FRM_FLT);