"While open source licensing of soft microprocessors allows
designers easily modify FPGAs and greater visibility into the CPU
architecture, it is important to understand the implications of
associated licensing models.
"FPGA designers are embedding soft microprocessors in an
increasing number of designs. As a result, FPGA vendors and
third-party Intellectual Property (IP) vendors have developed a
number of soft microprocessors that are licensed in a variety of
ways including the most recent model, Open Source..."