V2 release

[colluca]

At a high-level, the following major changes are planned for the v2 release:

• Merge PRs labeled v2 (functional or interface changes) into v2-dev (trip_counter: Add clear_i signal #282, id_queue: Expose full and empty status #261, Fix serial_deglitch.sv #252, popcount: Fix output width  #251, multiaddr_decode: Add default port logic #235, Add passthrough mode for mem_to_banks with NumBanks==1 #226)
• Address issues labeled v2
• Decide on other issues
• Prefix all modules with cc_ (Namespace all common_cells modules with a cc_ prefix  #290)
• Remove deprecated modules
• Create one common_cells_pkg and move contents of IP specific packages into it (Merge all packages into a single common_cells_pkg #291)
• Write spec from modules rough current functionality; guarantees and limits should be stated, functionality of modules should have as few restriction as possible (only necessary ones for its core function, eg the address_decoder change from integer indexes to also allow other types)
• Add Spyglass linting in Gitlab CI
• Ideally each nodule should have a functioning testbench
• Ideally some simpler things should be formally verified
• Convert all dependent params to localparams (Convert dependent parameters to localparams #292)
• We should maintain a good Changelog with a focus on what people need to do to migrate

Testing:

• Snitch
• AXI

[phsauter]

A changing list of common cells idea found in issues etc that might be of interest. None of these are a requirement for v2 and are only suggestions, I think we should in general be conservative with adding things and only do so if there is a need/usecase.

• weighted RR arbiter
• generic LFSR
• register file

[colluca]

Been wondering about the register file as well. My thought is that it might be best to create a separate repository for higher level core-related IPs.