MSG_XTRACT_TOKEN
#define MSG_TOKEN_MAX (MSG_XTRACT_TOKEN(MSG_TOKEN_ID_MASK) + 1)
u16 xfer_id = MSG_XTRACT_TOKEN(msg_hdr);
xfer->hdr.seq = MSG_XTRACT_TOKEN(msg_hdr);
MSG_XTRACT_TOKEN(msg_hdr), err, NULL, 0);
xfer->hdr.seq = MSG_XTRACT_TOKEN(msg_hdr);
xfer->hdr.seq = (u16)MSG_XTRACT_TOKEN(msg_hdr);
xfer_id = MSG_XTRACT_TOKEN(ioread32(&shmem->msg_header));