lyra

Lyra is a 64-bit UNIX-like hobby kernel for learning operating system development in Zig

Goals

• Readable and easy to understand codebase
• Multi-architecture support (x86, RISC-V, ARM)
• Modern design with Limine boot protocol

Non-goals

• Legacy support (32-bit, pre-Nehalem CPUs, etc)
• Obscure hardware support (e.g. big-endian)

Progress

• generic
  • tty
    • text mode impl
    • framebuffer impl
  • memory
    • pmm
    • vmm
  • process scheduler
    • red-black tree impl
    • process structures
    • smp awareness
• x86-64
  • gdt/idt
  • system clock
    • counter
    • hw clock reading
  • timers
    • pit programmer
  • smp
    • core id storage
  • interrupts
  • pci device tree
• aarch64
  • system clock
    • counter
    • hw clock reading
  • timers
  • smp
    • core id storage

Credits

• Zig for being the best programming language 😉
• AndreaOrru for the zen kernel project (on which this project is based)
  • Attribution headers with the license are provided on all files for which this may apply.
• OSDev.org for being a massively helpful resource
• The x86 architecture for making me question my life's choices