emu_setmap
if (bus_dmamap_load(sc->parent_dmat, *map, buf, sz, emu_setmap, addr,
if ((error = bus_dmamap_load(mem->dmat, *map, dmabuf, sz, emu_setmap, addr, 0)) || !*addr) {
static void emu_setmap(void *arg, bus_dma_segment_t * segs, int nseg, int error);