APPL_INTR_STATUS_L0
appl_writel(pcie, 0xFFFFFFFF, APPL_INTR_STATUS_L0);
status_l0 = appl_readl(pcie, APPL_INTR_STATUS_L0);
appl_writel(pcie, 0xFFFFFFFF, APPL_INTR_STATUS_L0);
status_l0 = appl_readl(pcie, APPL_INTR_STATUS_L0);
appl_writel(pcie, status_l0, APPL_INTR_STATUS_L0);
appl_writel(pcie, 0xFFFFFFFF, APPL_INTR_STATUS_L0);