jannos: jannes' learning project for OS dev

Building a kernel for Qemu's riscv virtual machine from scratch in Rust.

• uses OpenSBI, a sort of BIOS that Qemu defaults to, to simplify some peripheral interactions
• I am trying to use as few dependencies and as little assembly as possible

Notes

OpenSBI selects a hart as boot core and jumps to kernel. Kernel has to start up other harts by itself.

References

• https://github.com/mit-pdos/xv6-riscv
• https://osblog.stephenmarz.com/
• many more, TODO: add