Samudra OS

A prototype RISC-V operating system written in Rust that supports kernel Wasm modules.

Specifications

Supports:

• RISC-V (ISA: riscv64gcvh_zba_zbb_zbc_zbs_zfh - with planned zcb_zfa_zicond_zvbb_zvbc_zvfh, ABI: lp64d)
• Wasm (ISA: wasm32_bulk-memory_multivalue_mutable-globals_nontrapping-fptoint_reference-types_sign-ext_tail-call)

Dependencies

Required:

• QEMU
• Rust bare-metal toolchain
• C bare-metal toolchain
• Rust Wasm toolchain

Optional:

• Spike
• C Wasm toolchain

Quickstart

Run CC={{ bare-metal C compiler }} ./scripts/dev.sh

References

Thanks to:

• The Adventures of OS: Making a RISC-V Operating System using Rust
• maRVelOS
• RISC-V from scratch 1: Introduction, toolchain setup, and hello world!
• octox
• RISC-v Bytes
• Serial Programming/8250 UART Programming
• Xv6, a simple Unix-like teaching operating system
• os-tutorial
• Writing an OS in Rust