В Хелпе все есть, но я отдельно стоящий svn не привязывал. Source Code Control menu
The Source Code Control menu is available from the Project menu and from the context menu in the Workspace window. This menu contains some of the most commonly used commands of external, third-party source code control systems.
For more information about interacting with an external source code control system, see the IAR Embedded Workbench® IDE User Guide.