DMAC_REG_BAR
DMAC_REG_BAR, paddr);
DMAC_REG_BAR, (int) chan->ch_seg[0].ds_addr);
DMAC_REG_BAR, (int) chan->ch_map);
bus_space_read_4(sc->sc_bst, chan->ch_bht, DMAC_REG_BAR));