TPM_INTERRUPT_ENABLE
intmask = bus_space_read_4(sc->sc_bt, sc->sc_bh, TPM_INTERRUPT_ENABLE);
bus_space_write_4(sc->sc_bt, sc->sc_bh, TPM_INTERRUPT_ENABLE, intmask);
intmask = bus_space_read_4(sc->sc_bt, sc->sc_bh, TPM_INTERRUPT_ENABLE);
bus_space_write_4(sc->sc_bt, sc->sc_bh, TPM_INTERRUPT_ENABLE, intmask);