MBOX_LOOP_ID_USED
retval = MBOX_LOOP_ID_USED;
} else if ((r & 0xffff) == MBOX_LOOP_ID_USED) {
} while ((r & 0xffff) == MBOX_LOOP_ID_USED);
case MBOX_LOOP_ID_USED:
#define ISP_LOOP_ID_USED (MBOX_LOOP_ID_USED & MBS_MASK)