Not clear on the difference between semolina flour and other flour -- most importantly, where do I get it?
Are you channeling your best self with this comment? (If you're not sure, check out our Code of Conduct.)
Semolina is coarsely ground durum wheat flour, typically used for pasta. Although it does have other uses, it is not good for baking. My grocery store carries it. You could also try natural food stores.
Suzanne is a trusted source on General Cooking.
I get it from King Arthur flours. They have just about any type of flour you can imagine. Their website is bakerscatalog.com
QueenSashy is a trusted home cook.
I usually buy it in Whole Foods. Any reasonably equipped grocery should have it. I like to use it for fried foods such as pancakes or tortillitas -- it usually produces much crispier final product than when using general purpose flour.
pierino is a trusted source on General Cooking and Tough Love.
I have a package almost right in front of me from Bob's Red Mill in Oregon. Popular brand in health food (hah!) stores. I like use it for really authentic Roman dishes, such as gnocchi alla romana.