XGMAC_CONTROL
ctrl = readl(ioaddr + XGMAC_CONTROL);
writel(ctrl, ioaddr + XGMAC_CONTROL);
u32 value = readl(ioaddr + XGMAC_CONTROL);
writel(value, ioaddr + XGMAC_CONTROL);
value = readl(ioaddr + XGMAC_CONTROL);
writel(value, ioaddr + XGMAC_CONTROL);
ctrl = readl(ioaddr + XGMAC_CONTROL) & XGMAC_CONTROL_SPD_MASK;
writel(ctrl, ioaddr + XGMAC_CONTROL);
value = readl(ioaddr + XGMAC_CONTROL);
writel(value, ioaddr + XGMAC_CONTROL);