Hello!
I have searched a lot through forums, and Internet and was unable to find documentation on how BPI-R2 is booting. This info is needed for FreeBSD U-Boot patches.
It seems like loaders are in binary form, so there is no way to boot custom U-Boot, that will load FreeBSD ubldr.
If there is already some patchwork for U-Boot for BPI-R2 on FreeBSD, then could, please, someone provide it here?