DDR_WINDOW_BASE
mem_clusters[0].start = DDR_WINDOW_BASE + kernend;
t->_bounce_alloc_lo = DDR_WINDOW_BASE;
t->_bounce_alloc_hi = DDR_WINDOW_BASE + DDR_PHYSICAL_SIZE;
loongson2f_setup_window(MASTER_CPU, WINDOW_CPU_DDR, DDR_WINDOW_BASE,