cruzOS

My own OS written in Rust

sudo apt install qemu-kvm
rustup toolchain install nightly
rustup override set nightly
cargo install bootimage
rustup component add llvm-tools-preview

Memory allocators

• Bump Allocator: grows in the same direction once all allocated blocks are deallocated, reset memory.
• Linked List Allocator: freed blocks with at least 16 bytes are put in a linked list. Reutilizes suitable blocks. (obs: if you deallocate 8 bytes, those are lots until all references are deallocated and memory is reset like in bump allocator)

Async

There is a naïve task scheduler at /src/task/simple_executor.rs. Tasks can be spawned after executor starts runing. Tasks are not processes. They don't have their own contexes or memory.

Processes

Currently implementing context switching.

TODOs

• VGA printing queue with daemon job. If can't lock vga, add it to queue.
• UEFI over BIOS
• USB
• HDMI or DisplayPort over VGA
• Process scheduling (requirements??)
  • context switching
  • MLFQ with configurable parameters