EMAC_INT_STA_REG
reg_val = readl(db->membase + EMAC_INT_STA_REG);
writel(reg_val, db->membase + EMAC_INT_STA_REG);
int_status = readl(db->membase + EMAC_INT_STA_REG);
writel(int_status, db->membase + EMAC_INT_STA_REG);
reg_val = readl(db->membase + EMAC_INT_STA_REG);
writel(reg_val, db->membase + EMAC_INT_STA_REG);