JakubGawron1 / bold

My os thingy

BoldOS

Tested on Raspberry pi 3 on QEMU

Mix of:

• https://github.com/cs140e/rpi3-rust-template
• https://github.com/bztsrc/raspi3-tutorial
• https://wiki.osdev.org/Raspberry_Pi_Bare_Bones
• My ideas

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Screenshot

Development environment (linux) - with GUI

• Install dependencies:
  • apt install clang llvm binutils-aarch64-linux-gnu dosfstools mtools curl gdb-multiarch qemu-system-aarch64
• Install rust:
  • curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
    • (Default everything)
  • rustup component add rust-src
  • rustup override set nightly
• Run it:
  • cargo run --release

Development environment (linux) - without GUI

• Install dependencies:
  • apt install clang llvm binutils-aarch64-linux-gnu dosfstools mtools curl gdb-multiarch
  • apt install --no-install-recommends qemu-system-aarch64
• Install rust:
  • curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh
    • (Default everything)
    • source $HOME/.cargo/env
  • rustup override set nightly
  • rustup component add rust-src
• Run it:
  • cargo run --release -- -nographic -monitor none

Extra stuff

GDB

• Run the kernel (either cargo run --release or cargo run-stopped)
• ./scripts/gdb_attach.sh

Parsing exceptions

• Copy the "ESR" value
• Run parse_esr.py, and paste it in

Todo

• Physical page allocator
• Fixed virtual area for kernel data
• Cooperative multi-tasking for kernel tasks
  • Naive executor
  • Async-ify FileInterface
  • Maybe Stream-ify FileInterface?
  • Proper executor
• Read from SDHC card
• Print kernel argv
• Switch to EL1 from EL2
• Enable paging for EL1
• CI with Docker + GH actions
• Dynamically sized virtual allocator for kernel data
  • Dynamically map pages and allocate page tables
• Exception handling
• Interrupts
  • UART1 interrupts
  • Timer interrupts
• Multicore
  • Park cores properly
  • Execute tasks
• Higher-half kernel
• Make use of DTB
• Parse tar initrd
• Run code in EL0 (usermode)
• Paging for usermode
• FAT32 driver
• IPC layer (basic)
• VFS layer?
• Structured Exception Handling
• Simple Bluetooth
• Power management for RPI3
• USB
• USB HID Keyboard
• USB CDC Ethernet
• Usermode ICMP ping utility