• Cloned from https://github.com/stnolting/neorv32 v1.7.8 (28 nov 2022)
• Only the following files were kept: rtl/core and rtl/processor_templates/neorv32_ProcessorTop_UP5KDemo.vhd
• In core/neorv32_cpu.vhd, the following two lines have been commented out:
  • assert not (PMP_NUM_REGIONS > 0) report "NEORV32 CPU CONFIG NOTE: Implementing ...
  • assert not ((CPU_EXTENSION_RISCV_Zihpm = true) and (HPM_NUM_CNTS > 0)) report "NEORV32 CPU ... To apply patch execute : patch -u ./neorv32/rtl/core/neorv32_cpu.vhd -i neorv32_cpu.vhd.patch
• sim/run.py have been modified to enable coverage with sonarqube xml output in Vunit tests To apply modification execute (in the project root folder) : patch -u ./neorv32/sim/run.py -i run.py.patch
• build.ys file added
• linty/bugfinder analysis available on : https://sonar.linty-services.com/dashboard?id=TEST_NEORV32

sonarqube importation

to scan the project use command :

sonar-scanner -Dsonar.sources=. -Dsonar.projectKey=TEST_NEORV32 -Dsonar.host.url=https://sonar.linty-services.com -Dsonar.login=<token> -Dsonar.vhdl.topLevelEntity=neorv32_ProcessorTop_UP5KDemo -Dsonar.coverageReportPaths=./coverage.xml

coverage

GHDL coverage support

GHDL can support coverage with the help of GCC backend with gcov. To enable this feature you have to recompile GHDL with the official procedure or applie the one below if you are running Ubuntu 22.04.1 LTS (change gcc version to yours if not). The new ghdl application will be installed in /opt/ghdl. Do not forget to add it to the path with command export PATH=/opt/ghdl/bin:$PATH to replace your previous ghdl version by this one for the test.

$ sudo apt-get install gnat build-essential libmpc-dev flex bison libz-dev lcov gcc-11-source texinfo gcovr
$ git clone https://github.com/ghdl/ghdl.git
$ cd /usr/src/gcc-11
$ sudo tar xvf gcc-11.3.0.tar.xz 
$ cd gcc-11.3.0
$ ./contrib/download_prerequisites 
$ cd ghdl 
$ mdir build
$ cd build
$ ../configure --with-gcc=/usr/src/gcc-11/gcc-11.3.0 --prefix=/opt/ghdl
$ make copy-sources
$ mkdir gcc-objs; cd gcc-objs
$ /usr/src/gcc-11/gcc-11.3.0/configure  --prefix=/opt/ghdl --enable-languages=c,vhdl --disable-bootstrap --disable-lto --disable-multilib --disable-libssp --disable-libgomp --disable-libquadmath --enable-default-pie
$ make -j4 && make install MAKEINFO=true
$ cd ..
$ make ghdllib
$ make install

GHDL-gcc support version automatically pack the coverage support. you can use :

• docker version fedora36-gcc-11.3.0 from GHDL docker hub.

• or daily binaires ghdl-gha-ubuntu-22.04-gcc.tgz from ghdl but be careful with GCC version ( even if I was running on ubuntu 22.04 I got a library error libgcov profiling error:./ghdl-coverage-master/projects/adder/adder.gcda:Version mismatch - expected 11.3 (release) (B13*) got 11.2 (release) (B12*) trying to execute it).

neorv32 coverage

prerequisite

• Install:
  • VUnit with pip install vunit_hdl
  • ghdl gcc backend for coverage support
  • gcovr with pip install gcovr
  • xml python library pip install beautifulsoup4
• Set GHDL up in the path with export PATH=<ghdl/bin/path>:$PATH
• set GHDL as default simulator : VUNIT_SIMULATOR=ghdl

Run

• execute VUNIT_SIMULATOR=ghdl ./run.py in the neorv32-1.7.8/sim/
• wait for at least 20 Minutes (there is no feed back in the terminal execept at the end of simulation)
• the coverage.xml file will be created at the root of the project.

NX occupation measures

prerequisites

install impulse software from NanoXplore with the licence server.

Run

execute nxpython3 build.nxmap.py fromthe root of the project. A measures.json file should be created at the root of the project.