HA_DMA_BASE
dpt_outb(sc, HA_DMA_BASE + 0, (pa ) & 0xff);
dpt_outb(sc, HA_DMA_BASE + 1, (pa >> 8) & 0xff);
dpt_outb(sc, HA_DMA_BASE + 2, (pa >> 16) & 0xff);
dpt_outb(sc, HA_DMA_BASE + 3, (pa >> 24) & 0xff);