Improvising Self-rising cornmeal
yes. That is the basic different between self-rising cornmeal and regular cornmeal. 

From Food.com:
http://www.food.com/library/cornmeal-59

Self-rising cornmeal is a white or yellow cornmeal with leavening agents and salt added. 
Substitutions: 1 cup plain cornmeal + 1 1/2 tsp baking powder + 1/2 tsp salt = 1 cup self-rising cornmeal