How do I get it out of limp mode?

I was driving on the freeway when it sounded like rubber flapping from the tire and the engine shut off. As soon as I realized I lost power I just coasted to the Side of the road took the keys out and called a tow truck. So, the alternator pulley froze so it broke the belt which in turn broke my serpentine belt which is why it went into limp mode. My question is now that everything is replaced how do I get it out of limp mode?