A bunch of code that messes with low level stuff. That is:

• arch/riscv/:
  • machine: prints "hello, world" on the serial port while running in M mode on QEMU. Check the README file for more info.
  • supervisor/hsm: using the HSM extension from SBI to gather info from harts.
  • user/: user space programs that either delve into RISC-V assembly or that interface the Linux Kernel on the RISC-V architecture.
• kernel/dtm: simple kernel module showcasing the API from the of driver.

A lot of this is not taken solely from my brain, and I will give credit whenever it's relevant to each piece of code. For the rest of the code, the GPLv3+ license applies.