PCI_DDR_BASE
loongson_dma_base = PCI_DDR_BASE ^ DDR_WINDOW_BASE;
loongson_dma_base = PCI_DDR_BASE ^ DDR_PHYSICAL_BASE;
loongson2f_setup_window(MASTER_PCI, WINDOW_PCI_DDR, PCI_DDR_BASE,
loongson_dma_base = PCI_DDR_BASE ^ DDR_PHYSICAL_BASE;