DEV
spipe->tregs[LEN], spipe->tregs[PID], spipe->tregs[DEV],
t->current_tregs[0][DEV] = 0;
t->current_tregs[1][DEV] = 0;
DDOLOG("dev: %u", r->tregs[DEV], 0,0,0);
spipe->tregs[DEV] = pipe->up_dev->ud_addr;