From My understanding and please correct me if I am wrong, since rocket chip is under BSD and freedom and freedom-e-sdk are both under apache 2.0, then modification and commercial use are allowed. freedom is kind of the environment to build the E300 Platform which is based on E31 Coreplex using a customized configuration on top of rocket chip chisel implementation. Since, again it is under apache 2.0, then modification and commercial use are allowed. However SiFive is selling a license for E31 Coreplex IP. I am not sure what I missed, but what does the license, offered by SiFive for purchase, contain more than what’s available and open in freedom which is under apache 2.0 ?
Besides, in the link https://www.sifive.com/products/coreplex-risc-v-ip it is claimed that there will be no roaylties applied on the commercial products sold using Coreplex IP, But in the license agreement preview under section 4.3 it was mentioned that if royalties are due a royalty report will be submitted to SiFive. Does that mean that under some conditions there will be royalties due ? if so what are they ?