BASE_FB
tag = elb_get_bus_space_tag(BASE_FB);
fb_cnattach(tag, BASE_FB2, (void *)BASE_FB);
{ "fb", BASE_FB, BASE_FB2, -1, &elb_fb_tag },
BASE_FB,
ppc4xx_tlb_reserve(BASE_FB, BASE_FB, TLB_PG_SIZE, TLB_I | TLB_G);