timerattach
void timerattach(device_t, const struct timerfns *);
timerattach(self, &timerfns_isa);
timerattach(self, &timerfns_jazzio);
timerattach(&timerreg4->t_c10.t_counter, &timerreg4->t_c10.t_limit);
timerattach(&timerreg4->t_c10.t_counter, &timerreg4->t_c10.t_limit);
timerattach(&timerreg4m->t_counter, &timerreg4m->t_limit);
void timerattach(volatile int *, volatile int *);
static void timerattach(device_t, device_t, void *);
timermatch, timerattach, NULL, NULL);