-void dma_copy32(int channel, void *dst, void *src, int words);
-void dma_copy16(int channel, void *dst, void *src, int halfwords);
+void dma_copy32(int channel, void *dst, void *src, int words, unsigned int flags);
+void dma_copy16(int channel, void *dst, void *src, int halfwords, unsigned int flags);