EWS4800MIPS_DMAMAP_COHERENT
map->_dm_flags |= EWS4800MIPS_DMAMAP_COHERENT;
map->_dm_flags &= ~EWS4800MIPS_DMAMAP_COHERENT;
if (map->_dm_flags & EWS4800MIPS_DMAMAP_COHERENT)