TMR_CTL_WDOG_MODE
KASSERT((sc->sc_wdog_ctl & TMR_CTL_WDOG_MODE) == 0);
sc->sc_wdog_ctl = TMR_CTL_ENABLE | TMR_CTL_WDOG_MODE
sc->sc_wdog_ctl = TMR_CTL_ENABLE | TMR_CTL_WDOG_MODE
sc->sc_wdog_armed = (sc->sc_wdog_ctl & TMR_CTL_WDOG_MODE) != 0;