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ibex-yosys-build

Build Status This repository contains scripts to synthesize and build Ibex CPU for Arty A7 (A35T) board using SymbiFlow toolchain.

Getting started

Clone repository

git clone --recursive https://github.com/antmicro/ibex-yosys-build

Install Prerequisites

This repository requires SymbiFlow toolchain and Lowrisc RISCV toolchain Install SymbiFlow toolchain using:

wget https://repo.continuum.io/miniconda/Miniconda3-latest-Linux-x86_64.sh -O conda_installer.sh
export INSTALL_DIR="/opt/symbiflow/xc7"
bash conda_installer.sh -b -p $INSTALL_DIR/conda && rm conda_installer.sh
source "$INSTALL_DIR/conda/etc/profile.d/conda.sh"
conda env create -f examples/xc7/environment.yml
conda activate xc7
wget -qO- https://storage.googleapis.com/symbiflow-arch-defs/artifacts/prod/foss-fpga-tools/symbiflow-arch-defs/continuous/install/27/20200630-100111/symbiflow-arch-defs-install-30f7325f.tar.xz | tar -xJ -C $INSTALL_DIR
export PATH="$INSTALL_DIR/install/bin:$PATH"

download Lowrisc RISCV toolchain using (you can change the installation directory using -t flag):

wget https://raw.githubusercontent.com/lowRISC/opentitan/master/util/get-toolchain.py
python3 get-toolchain.py -t ${PWD}/tools/riscv
export PATH=$PATH:${PWD}/tools/riscv/bin

Preparing tools

To prepare environment, apply ibex.patch, download ibex requirements and prepare ibex for Arty A7 to build with yosys:

cd ibex
git apply ../ibex.patch
pip install -r python-requirements.txt
make sw-led
fusesoc --cores-root=. run --target=synth --setup lowrisc:ibex:top_artya7 --part xc7a35ticsg324-1L
cd ..
make ibex/configure
make patch/symbiflow

Build yosys, symbiflow yosys plugins and install it in conda environment:

cd yosys && make -j$(nproc) && PREFIX=$INSTALL_DIR/conda/envs/xc7 make install && cd ..
cd yosys-symbiflow-plugins && make -j$(nproc) install && cd ..

Generating bitstream

To generate bitstream run:

make

ibex-yosys-build's People

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ibex-yosys-build's Issues

Yosys complaining about a syntax error at the data type token in parameter statements

Hello,

I have followed the instructions on the main README, and running make in the conda environment fails at synthesis due to yosys flagging things like parameter <data_type> name as syntax errors:

1. Executing Verilog-2005 frontend: /home/ag/ibex-yosys-build/ibex/build/lowrisc_ibex_top_artya7_0.1/src/lowrisc_ibex_ibex_pkg_0.1/rtl/ibex_pkg.sv
Parsing SystemVerilog input from `/home/ag/ibex-yosys-build/ibex/build/lowrisc_ibex_top_artya7_0.1/src/lowrisc_ibex_ibex_pkg_0.1/rtl/ibex_pkg.sv' to AST representation.
/home/ag/ibex-yosys-build/ibex/build/lowrisc_ibex_top_artya7_0.1/src/lowrisc_ibex_ibex_pkg_0.1/rtl/ibex_pkg.sv:290: ERROR: syntax error, unexpected TOK_INT
make: *** [Makefile:46: build/top_artya7.eblif] Error 1

which refers to this line:

parameter int unsigned PMP_MAX_REGIONS      = 16;

Here's the yosys version (the submodule included in this repo):

Yosys 0.9+2406 (git sha1 d8b2d1a2, x86_64-conda_cos6-linux-gnu-gcc 1.23.0.449-a04d0 -fvisibility-inlines-hidden -fmessage-length=0 -march=nocona -mtune=haswell -ftree-vectorize -fPIC -fstack-protector-strong -fno-plt -O2 -ffunction-sections -fdebug-prefix-map=/tmp/really-really-really-really-really-really-really-really-really-really-really-really-really-long-path/conda/conda-bld/symbiflow-yosys_1594678149043/work=/usr/local/src/conda/symbiflow-yosys-0.8_6021_gd8b2d1a2 -fdebug-prefix-map=/opt/symbiflow/xc7/conda/envs/xc7=/usr/local/src/conda-prefix -fPIC -Os -fno-merge-constants)

Yosys commit hash: fe58e937ef87fdb157dd89c365bb6a570fe616ea

Ibex commit hash: 6b9165fa66b49534226acfcb739f2c252be4853c

Thanks.

Build currently broken due to pip / conda issue. 

Preparing transaction: ...working... done
Verifying transaction: ...working... done
Executing transaction: ...working... done
Installing pip dependencies: ...working... Pip subprocess error:
ERROR: Exception:
Traceback (most recent call last):
  File "/tmpfs/src/github/ibex-yosys-build/env/conda/envs/xc7/lib/python3.8/site-packages/pip/_internal/cli/base_command.py", line 173, in _main
    status = self.run(options, args)
  File "/tmpfs/src/github/ibex-yosys-build/env/conda/envs/xc7/lib/python3.8/site-packages/pip/_internal/cli/req_command.py", line 203, in wrapper
    return func(self, options, args)
  File "/tmpfs/src/github/ibex-yosys-build/env/conda/envs/xc7/lib/python3.8/site-packages/pip/_internal/commands/install.py", line 286, in run
    reqs = self.get_requirements(args, options, finder, session)
  File "/tmpfs/src/github/ibex-yosys-build/env/conda/envs/xc7/lib/python3.8/site-packages/pip/_internal/cli/req_command.py", line 384, in get_requirements
    for parsed_req in parse_requirements(
  File "/tmpfs/src/github/ibex-yosys-build/env/conda/envs/xc7/lib/python3.8/site-packages/pip/_internal/req/req_file.py", line 135, in parse_requirements
    for parsed_line in parser.parse(filename, constraint):
  File "/tmpfs/src/github/ibex-yosys-build/env/conda/envs/xc7/lib/python3.8/site-packages/pip/_internal/req/req_file.py", line 319, in parse
    yield from self._parse_and_recurse(filename, constraint)
  File "/tmpfs/src/github/ibex-yosys-build/env/conda/envs/xc7/lib/python3.8/site-packages/pip/_internal/req/req_file.py", line 348, in _parse_and_recurse
    yield from self._parse_and_recurse(req_path, nested_constraint)
  File "/tmpfs/src/github/ibex-yosys-build/env/conda/envs/xc7/lib/python3.8/site-packages/pip/_internal/req/req_file.py", line 324, in _parse_and_recurse
    for line in self._parse_file(filename, constraint):
  File "/tmpfs/src/github/ibex-yosys-build/env/conda/envs/xc7/lib/python3.8/site-packages/pip/_internal/req/req_file.py", line 353, in _parse_file
    _, content = get_file_content(filename, self._session)
  File "/tmpfs/src/github/ibex-yosys-build/env/conda/envs/xc7/lib/python3.8/site-packages/pip/_internal/req/req_file.py", line 518, in get_file_content
    resp = session.get(url)
  File "/tmpfs/src/github/ibex-yosys-build/env/conda/envs/xc7/lib/python3.8/site-packages/pip/_vendor/requests/sessions.py", line 555, in get
    return self.request('GET', url, **kwargs)
  File "/tmpfs/src/github/ibex-yosys-build/env/conda/envs/xc7/lib/python3.8/site-packages/pip/_internal/network/session.py", line 454, in request
    return super().request(method, url, *args, **kwargs)
  File "/tmpfs/src/github/ibex-yosys-build/env/conda/envs/xc7/lib/python3.8/site-packages/pip/_vendor/requests/sessions.py", line 542, in request
    resp = self.send(prep, **send_kwargs)
  File "/tmpfs/src/github/ibex-yosys-build/env/conda/envs/xc7/lib/python3.8/site-packages/pip/_vendor/requests/sessions.py", line 697, in send
    r.content
  File "/tmpfs/src/github/ibex-yosys-build/env/conda/envs/xc7/lib/python3.8/site-packages/pip/_vendor/requests/models.py", line 836, in content
    self._content = b''.join(self.iter_content(CONTENT_CHUNK_SIZE)) or b''
  File "/tmpfs/src/github/ibex-yosys-build/env/conda/envs/xc7/lib/python3.8/site-packages/pip/_vendor/requests/models.py", line 769, in generate
    chunk = self.raw.read(chunk_size)
AttributeError: 'FileNotFoundError' object has no attribute 'read'

Ran pip subprocess with arguments:
['/tmpfs/src/github/ibex-yosys-build/env/conda/envs/xc7/bin/python', '-m', 'pip', 'install', '-U', '-r', '/tmpfs/src/github/ibex-yosys-build/condaenv.o2j6_bfy.requirements.txt']
Pip subprocess output:

failed

CondaEnvException: Pip failed

third_party/make-env/conda.mk:145: recipe for target '/tmpfs/src/github/ibex-yosys-build/env/conda/envs/xc7/bin/python' failed
make: *** [/tmpfs/src/github/ibex-yosys-build/env/conda/envs/xc7/bin/python] Error 1

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