Date: Tue, 4 Jun 2013 06:20:37 +0400 From: Solar Designer <solar@...nwall.com> To: john-dev@...ts.openwall.com Subject: FPGA reprogramming on ZedBoard / Parallella board Katja, Rafael, Stephen - It turns out that it is actually trivial and quick to replace the FPGA bitstream off the booted up Linux or FreeBSD system on ZedBoard. Here are my recent tweets on this: <solardiz> To load FPGA bitstream off live Linux on ZedBoard: "mknod /dev/xdevcfg c 259 0", then "cat" into it (takes 85 ms for 4 Mbytes) @jangray <solardiz> I've just extracted the bitstreams out of Parallella project's BOOT.BIN and ZedBoard's default SD card image BOOT.BIN with "dd" ... <solardiz> ... tried swapping the two on live Linux system - works like a charm. Here's where this turns out to be documented: http://www.xilinx.com/support/answers/46913.html <solardiz> FreeBSD for ZedBoard http://marc.info/?l=freebsd-arm&m=136201029232177 http://www.thomasskibo.com/zedbsd/ with FPGA reprogramming via /dev/devcfg0 http://marc.info/?l=freebsd-arm&m=136206433415819 <solardiz> Just noticed that @PicoComputing now has a Zynq 7020 board too: http://picocomputing.com/e-series/e-102 Unfortunately, loading an erroneous bitstream makes the system inaccessible at least over Ethernet - so we'd need to be careful. (A simple power-cycle brings the system back.) Alexander
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