HH_INTR_SECONDARY
out32(HH_INTR_SECONDARY, ~0); /* Reset interrupt. */
out32(HH_INTR_SECONDARY, ~0);
out32(HH_INTR_SECONDARY, 0);
out32(HH_INTR_SECONDARY, ~0);
out32(HH_INTR_SECONDARY, 0);