Dual-core processor and shared SDRAM

I have DE0-CV board. I am trying to design and implement a dual core processor using NIOS II. These two cores are going to run two applications and share no data(no need for mutex). Both cores need to use the SDRAM since the applications are pretty large. I can just put two NIOS cores and connect only one of them to SDRAM controller but I don't know how I can connect both cores to it and partition it (each core should use half of the memory). How can I connect both cores to SDRAM? is there any multicore example that uses SDRAM?