In 3 1/2- to 4-quart slow cooker, place onion and garlic. Top with pork. In small bowl, mix cornmeal, cumin, oregano and salt; sprinkle over pork and mix well. Add beans, tomatoes and broth; mix well.
Cover; cook on Low heat setting 8 to 10 hours.
Stir in corn. Cover; cook on Low heat setting about 30 minutes or until corn is tender.