I want to connect two different ips in platform designer tool like core and AVMM ?

Still not clear what you are looking for. Platform Designer builds an interconnect when you generate a system. If you are saying that you want to connect something outside a PD system to components inside a PD system (without turning it into a custom component to connect directly inside PD), you can export an interface (like Avalon memory-mapped) out of the system and connect it to something through standard HDL instantiation using the generated instantiation template created by PD.