GTEN_VRAM_OFFSET
error = bus_space_map(pa->pa_memt, gt->gt_memaddr + GTEN_VRAM_OFFSET,
gt->gt_psize = gt->gt_memsize - GTEN_VRAM_OFFSET;
error = bus_space_map(memt, busaddr + GTEN_VRAM_OFFSET, 960*1024,