This is part of the Debian PowerPC e500 porting effort, the series on my blog starts at: "How to bootstrap a new Debian port"
It's released under the GPLv2 here:
It requires an existing TFTP server that can be accessed by SSH and by your BDI-3000 at the same address. Additionally, the TFTP server is expected to be able to telnet to the BDI (since the To customize it for your hardware and network configuration, just edit the script directly.
The first few lines contain the default command-line values, but to adjust the SDRAM configuration for your hardware you will need to edit the list of initialization values much further down in the file.
The usage is pretty simple (assuming the defaults are set up right):
$ bditool flash ./my-uboot.bin
$ bditool exec "help"
$ bditool exec "info"
$ bditool exec "config"
$ bditool boot
Please let me know if you have questions!