bus_mem_add_mapping
error = bus_mem_add_mapping(t, bpa, size, flags, mhp);
error = bus_mem_add_mapping(t, bpa, size, flags, bshp);
static int bus_mem_add_mapping(bus_space_tag_t t, bus_addr_t bpa,
error = bus_mem_add_mapping(bpa, size, flags, hp);
error = bus_mem_add_mapping(bpa, size, flags, hp);
int bus_mem_add_mapping(bus_addr_t, bus_size_t, int, bus_space_handle_t *);