This is a firmware image for emulating ACube Sam460ex on QEMU. The board is described on the manufacturer's site: http://www.acube-systems.biz/index.php?page=hardware&pid=5 This u-boot binary image is compiled from the sources at http://www.acube-systems.biz/download/u-boot-2010.06-05_20110414_prod.tar.gz with the eclosed patch applied to fix some problems described here: http://lists.nongnu.org/archive/html/qemu-ppc/2017-08/msg00112.html