Can sdram be accessed by multiple processors in Cyclone II FPGA?

Hello. I have a multiprocessor configuration set up in a Cyclone II device (EP2C35). I am currently using offchip sdram (Micron MT48LC4M32B2-7) for one processor and using on-chip RAM for the other...for all program memory, data memory, stack, etc. I am interested in adding another processor, but there is not enough on-chip RAM left. Is it possible to access the same sdram from multiple processors (but at different locations, naturally)? If so, how do I go about setting this up...should I use one SDRAM controller connected to each processor that needs it, or should I set up multiple controllers and somehow tell them to access different sections? Any advice is appreciated! Thanks!