DMT_IRQ_TCAR
if (DMTIMER_READ4(sc, DMT_IRQSTATUS_RAW) & DMT_IRQ_TCAR) {
DMTIMER_WRITE4(sc, DMT_IRQSTATUS, DMT_IRQ_TCAR);
#define DMT_IRQ_MASK (DMT_IRQ_TCAR | DMT_IRQ_OVF | DMT_IRQ_MAT)