MCT_G_CNT_U
if (o == MCT_G_CNT_L || o == MCT_G_CNT_U) {
case MCT_G_CNT_U:
gcntu = mct_read_global(sc, MCT_G_CNT_U);
} while (gcntu != mct_read_global(sc, MCT_G_CNT_U));