Ezynq

Decription

Ezynq project is started to create a bootloader for systems based on the Xilinx Zynq SoC without the inconvenience of the non-free tools and/or files. The goal is not just to "free" the code, but to provide users with the higher degree of flexibility in fine-tuning of the configuration parameters.

Supported boards

• Avnet MicroZed - Zynq 7Z010

Output

• boot.bin (fsbl is not required to boot)

Install meta-toolchain (Ubuntu 13.04)

sudo apt-get install texinfo chrpath
git clone -b dylan git://git.yoctoproject.org/poky
cd poky
. ./oe-init-build-env
bitbake meta-toolchain

• Run installation script in build/tmp/deploy/

Install ezynq (Ubuntu 13.04)

git clone git://git.code.sf.net/p/elphel/ezynq ezynq
cd ezynq
./install_uboot.sh

Generate boot.bin

• Edit initenv according to the built meta-toolchain

cd u-boot-xlnx
./makeuboot

• The generated files are:
  • boot.bin - the bootloader image
  • u-boot.html - configuration settings overview
  • u-boot.map - the bootloader's memory map
  • u-boot - ELF file

Develop (add boards support)

• Add a new board record to the list in the boards.cfg (or leave as is if the item already exists).
• Create a configuration file for the new board - use include/configs/zynq_microzed.h as a reference
• Edit (or create new for specific memory and chip) according to the board configuration the following files:

include/configs/ezynq/ezynq_MT41K256M16RE125.h
include/configs/ezynq/ezynq_XC7Z010_1CLG400.h
include/configs/ezynq/zed_ezynq.h

./makeuboot

IMPORTANT: Only 192KB of zynq's series on-chip memory are available at boot. It is the maximal size of u-boot.bin (not the final boot.bin) - the python script will throw a warning.

Known issues

• USB does not work yet.
• Bitstream loading is not tested, current code does not enable level shifters - it may be more appropriate to do just before loading of the bitstream.