ML403 FPGA and CPLD

Hallo,
I would connect virtex-4fx  and cpld to test an i2c slave peripheral.

Into virtex-4 I have programmed a small system with microblaze, opb_i2c, and 
some other peripherals.

Into cpld I would program a small i2c custom slave peripheral.

Is it possible to realize, otherwise I have troubles due to bus sharing with 
flash and ram?

Many thanks in advance
Marco