How do i add my IP to EDK?

choose the right bus : fsm, opb, (there is a wizard) then map your core, then write the drivers code, then test it...

If you are attaching to the OPB, PLB, or FSL, you can use the Create/ Import Peripheral Wizard to create a skeleton for you. I thing there are some tutorials out there that describe using the IPIF.

If you prefer not to use the IPIF, you are using another bus (custom, point-to-point, DCR, or LMB), or you just want to do this manually, you can follow the conventions used by other IP cores (check under EDK/ hw). You need to follow a certain folder structure and have correct MPD (Microprocessor Peripheral Description) and PAO (Peripheral Analyze Order) files. Use existing IP core MPD and PAO files as a reference along with the Platform Specification Format Reference Manual (psf_rm.pdf).

Once you have these finished, you just need to put your IP core in a user repository and it will show up under EDK (assuming EDK was closed when you were doing this, or you manually refreshed the user IP cores through EDK).