Hello Michal, > > yes > or of course what SPL supports just directly to the OS > > [1] Boot ROM > [2] U-Boot SPL > [3] OS > > any question regarding this? Thanks. FSBL can download FPGA bit stream. Is it supported by U-Boot SPL too? If I don't have to launch Xilinx SDK to create FSBL, that'd be better. Best Regards Masahiro Yamada