AVE_GISR
writel(bitflag, priv->base + AVE_GISR);
writel(AVE_GI_RXOVF, priv->base + AVE_GISR);
gisr_val = readl(priv->base + AVE_GISR);
writel(AVE_GI_PHY, priv->base + AVE_GISR);
writel(AVE_GI_RXERR, priv->base + AVE_GISR);
writel(AVE_GI_RXDROP, priv->base + AVE_GISR);