Which files belong in version control

Hi everyone,

I want to put my Nios II software projects under version control (git in my case). I was wondering, apart from the source files, which files should be put under version control?

Also, If you have "clean" ways to manage your project it would be nice if you could share them. For example, where you put your source files relative to your project and workspace, do you generate batch files to regenerate the bsp automatically, etc.

Thanks!

Benjamin