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Backport of Milkymist SoC to the Xilinx ML401 board (EXPERIMENTAL AND LARGELY UNMAINTAINED)

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README
[> Milkymist(tm) system-on-chip
-------------------------------

This is the complete core source code and documentation for the opensource
system-on-chip used in the Milkymist(tm) interactive VJ station.

For the latest releases, binary distributions and more:
  http://www.milkymist.org


[> Directory Structure
 /cores/      Cores library, with Verilog sources, test benches and documentation.
 /boards/     Top-level design files, constraint files and Makefiles
              for supported FPGA boards.
 /software/   Software for the SoC.
 /std/        Definitions for Milkymist protocols and formats.
 /doc/        System documentation.
 /tools/      Small tools for developers.
 /patches/    Example patches.


[> Building tools
You will need:
 - GNU Make,
 - Bourne Again Shell (bash),
 - Xilinx ISE for synthesizing the FPGA bitstream (WebPack is enough),
 - LatticeMico32 toolchain for building the SoC software,
For the host-side tools:
 - native Clang/LLVM toolchain,
 - libGD,
For the demonstration firmware:
 - RE2C,
 - Lemon parser generator,
 - Scilab.

In case of Xst bugs or to improve timing/area (optional):
 - Synplify Pro (Synopsys),
 - or Precision RTL (Mentor Graphics).

NB. Before switching synthesis tools, don't forget to run "make clean" in the
synthesis directory.


[> Scripts
[>> Building
 /boards/xxx/synthesis/build/system.bit build_bitstream.sh FPGA bitstream.
 /software/bios/bios_splash.bin         build_bios.sh      BIOS image.
 /software/demo/boot.bin                build_demo.sh      Demonstration firmware image.
 /doc/xxx.pdf                           build_doc.sh       System-wide documentation.
 /cores/xxx/doc/xxx.pdf                 build_doc.sh       Core-specific documentation.

[>> Loading
 - load_bitstream.sh  : loads bitstream in volatile memory.
 - flash_bitstream.sh : loads bitstream in non-volatile memory.
 - flash_bios.sh      : loads BIOS into NOR flash (currently no way of storing it
                        in volatile memory).
 - load_demo.sh       : runs a SFL server and terminal program that downloads the
                        demo firmware at device boot.


[> Quickstart
1- connect serial and JTAG cables
2- connect VGA monitor
3- build & load:
./build_bitstream.sh
./build_bios.sh
./build_demo.sh
./flash_bios.sh
./load_demo.sh # will stay attached to display system debug messages
./load_bitstream.sh # from another terminal

# if you like it
./flash_bitstream.sh
cp software/demo/image.bin /memory_card/


[> Development
For Verilog simulations, the scripts (usually Makefiles) shipped with the test benches 
take care of running the simulator.

Depending on the IP core, one or more of these free simulators are supported:
 - Icarus Verilog (http://www.icarus.com/eda/verilog/)
 - GPL Cver (http://www.pragmatic-c.com/gpl-cver/)
 - Verilator (http://www.veripool.org/wiki/verilator)

For firmware development, a serial console program compatible with automatic firmware
loading over the serial line (SFL boot) is provided in the /tools/ directory.


[> Credits
Most of the work is (C) Copyright 2007, 2008, 2009, 2010 Sebastien Bourdeauducq.
For this work:
 - The hardware design is licensed under GNU GPLv3.
   See the LICENSE.GPL file for more information.
 - The software (software/*) is licensed under GNU GPLv3, except the SDRAM
   initialization runtime (libHPDMC) which is under GNU LGPLv3.
   See LICENSE.GPL and LICENSE.LGPL.
 - The documentation is licensed under FDL.
   See LICENSE.FDL.

Milkymist is a trademark of Sebastien Bourdeauducq.

The SoC design uses:
 - the Mico32 soft-processor by Lattice Semiconductor. See the LICENSE.LATTICE file.
 - a modified version of wb_conbus by Johny Chi and Rudolf Usselmann. See LICENSE.LGPL.

The directory organization and build scripts were inspired by soc-lm32 by the German
hackerspace Das Labor. Some of the UART and timer code also comes from there.

The software and software library include:
 - the SoftFloat IEC/IEEE Floating-point Arithmetic Package, Release 2,
   written by John R. Hauser. See source files headers for license.
 - fundamental functions library by Jesus Calvino-Fraga. See the LICENSE.LGPL file.
 - line drawing code from the GD library. See the LICENSE.GD file.

Special thanks to the people who did significant things which made this project possible:
 - Lattice Semiconductor for the Mico32 processor,
 - Shawn Tan for the AEMB processor (used earlier),
 - Stephen Williams for Icarus Verilog,
 - Pragmatic C Software for GPL Cver,
 - Wilson Snyder for Verilator,
 - Henry from Xilinx,
 - Das Labor for providing neat build scripts for SoCs (soc-lm32).


[> Contact
E-mail: sebastien.bourdeauducq at lekernel daaht net
Phone:  +33(0)606644335
PGP:    0x9277FCF2

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