Function bus_dmamap_sync

freebsd/mips/mips/busdma_machdep.c:1258–1285

}

void
bus_dmamap_sync(bus_dma_tag_t dmat, bus_dmamap_t map, bus_dmasync_op_t op)
{
	struct sync_list *sl, *end;
	int aligned;

	if (op == BUS_DMASYNC_POSTWRITE)
		return;
	if (STAILQ_FIRST(&map->bpages))
		_bus_dmamap_sync_bp(dmat, map, op);

	if ((dmat->flags & BUS_DMA_COHERENT) ||
	    (map->flags & DMAMAP_UNCACHEABLE)) {
		if (op & BUS_DMASYNC_PREWRITE)
			mips_sync();
		return;
	}

	aligned = (map->flags & DMAMAP_CACHE_ALIGNED) ? 1 : 0;

	CTR3(KTR_BUSDMA, "%s: op %x flags %x", __func__, op, map->flags);
	if (map->sync_count) {
		end = &map->slist[map->sync_count];
		for (sl = &map->slist[0]; sl != end; sl++)
			bus_dmamap_sync_buf(sl->vaddr, sl->datacount, op,
			    aligned);
	}
}

static void
init_bounce_pages(void *dummy __unused)