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Anton Lydike a720f34482 removed optimization flags as they broke scheduling 3 years ago
kinclude fixed a couple of small bugs 3 years ago
programs added example prorgam which creates and joins threads 3 years ago
.gitignore added uncrustify config for formatting 3 years ago
LICENSE initial commit 3 years ago
Makefile removed optimization flags as they broke scheduling 3 years ago
README.md updated readme 3 years ago
cleanup.sh added cleanup.sh file that cleans up all source code 3 years ago
kernel.c general cleanup in kernel code removing unised defines etc 3 years ago
kernel.h general cleanup in kernel code removing unised defines etc 3 years ago
linker.ld various imrpovements and implementations on the kernel 3 years ago
package.py more comments and better structure 3 years ago
uncrustify.cfg added uncrustify config for formatting 3 years ago

README.md

EMBARK: An Educational and Modifiable BAsic RISC-V Kernel

EMBARK is a small kernel, designed for educational projects. It has very limited scope and is designed to be extensible.

The toolchain:

I am using the riscv-gnu-toolchain, configured with --with-arch=rv32im --disable-linux --disable-gdb --disable-multilib and built using make -j <number of threads>.

The Makefile:

You can build the kernel using make kernel. Make sure the toolchain is in your path!

Packaging a kernel image with user programs

You can use the package.py script to package a kernel and multiple user binaries into a single img file.

Debugging information is also emitted, it's a json formatted file called <name>.img.dbg.

To generate such an image, run python3 package.py out/kernel <user bin 1> <usr bin 2> ... output/path/memory.img. You can edit the script to change various variables. They somewhat well documented.