Wait, the user might be looking for information on whether there's a free (as in free software) firmware available for the Sun50iw9p1. If there isn't any official, but there's a community port, that's worth mentioning. Alternatively, if the firmware is partially open-source, explain which parts are open.
From the list, choose the option that matches your board configuration (e.g., mercury_demo-userdebug ). Then, extract the proprietary binaries and start the build: sun50iw9p1 firmware free
Remember, there is no "official" repository. The quality and safety of the firmware you find depend entirely on the reputation of the source. Wait, the user might be looking for information