zx_cross
volatile struct zx_cross *sc_zx;
sizeof(struct zx_cross), BUS_SPACE_MAP_LINEAR, 0, &bh) != 0) {
sc->sc_zx = (struct zx_cross *)bus_space_vaddr(bt, bh);
volatile struct zx_cross *zx;
volatile struct zx_cross *zx;
volatile struct zx_cross *zx;
volatile struct zx_cross *zx;