GMAC_L3L4_CTRL
value = readl(ioaddr + GMAC_L3L4_CTRL(filter_no));
writel(value, ioaddr + GMAC_L3L4_CTRL(filter_no));
writel(0, ioaddr + GMAC_L3L4_CTRL(filter_no));
value = readl(ioaddr + GMAC_L3L4_CTRL(filter_no));
writel(value, ioaddr + GMAC_L3L4_CTRL(filter_no));
writel(0, ioaddr + GMAC_L3L4_CTRL(filter_no));