PPB_IO_SHIFT
blr |= (iobase & PPB_IO_MASK) >> PPB_IO_SHIFT;
blr |= (iobase >> PPB_IO_SHIFT);
blr |= ((iobase & PPB_IO_MASK) >> PPB_IO_SHIFT) | PPB_IO_32BIT;
blr |= (sc->sc_iobase >> PPB_IO_SHIFT);
sc->sc_iobase = (blr << PPB_IO_SHIFT) & PPB_IO_MASK;
blr |= (sc->sc_iobase >> PPB_IO_SHIFT);