EMAC_RX_CTL0
r = readl(ioaddr + EMAC_RX_CTL0);
writel(r, ioaddr + EMAC_RX_CTL0);
v = readl(ioaddr + EMAC_RX_CTL0);
writel(v, ioaddr + EMAC_RX_CTL0);
v = readl(ioaddr + EMAC_RX_CTL0);
writel(v, ioaddr + EMAC_RX_CTL0);