SCC_ISRCCNT
serdev_intr_t *ih_src[SCC_ISRCCNT];
while (i < SCC_ISRCCNT) {
for (i = 0; i < SCC_ISRCCNT; i++)
while (i < SCC_ISRCCNT && !(ipend & isrc))
KASSERT(i < SCC_ISRCCNT, ("%s", __func__));