INT2_LOCAL0_MASK
bus_space_write_1(iot, ioh, INT2_LOCAL0_MASK, 0);
l0mask = bus_space_read_1(iot, ioh, INT2_LOCAL0_MASK);
mask = bus_space_read_1(iot, ioh, INT2_LOCAL0_MASK);
bus_space_write_1(iot, ioh, INT2_LOCAL0_MASK, mask);
mask = bus_space_read_1(iot, ioh, INT2_LOCAL0_MASK);
bus_space_write_1(iot, ioh, INT2_LOCAL0_MASK, mask);