PIC_CPUCTRL
reg = bus_space_read_4(psc.iot, psc.ioh, PIC_CPUCTRL);
bus_space_write_4(psc.iot, psc.ioh, PIC_CPUCTRL, reg);
reg = bus_space_read_4(psc.iot, psc.ioh, PIC_CPUCTRL);
bus_space_write_4(psc.iot, psc.ioh, PIC_CPUCTRL, reg);
reg = bus_space_read_4(psc.iot, psc.ioh, PIC_CPUCTRL);
bus_space_write_4(psc.iot, psc.ioh, PIC_CPUCTRL, reg);