this repo has no description
Init
+269
+1
.envrc
+1
.envrc
···
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use_nix
+18
.zed/settings.json
+18
.zed/settings.json
···
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// Folder-specific settings
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//
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// For a full list of overridable settings, and general information on folder-specific settings,
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// see the documentation: https://zed.dev/docs/configuring-zed#settings-files
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{
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"lsp": {
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"rust-analyzer": {
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"initialization_options": {
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"cargo": {
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"target": "riscv64gc-unknown-linux-gnu",
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},
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"check": {
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"allTargets": false,
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},
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},
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},
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},
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}
+15
kernel/.cargo/config.toml
+15
kernel/.cargo/config.toml
···
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[build]
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target = "riscv64gc-unknown-linux-gnu"
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[target.riscv64gc-unknown-linux-gnu]
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linker = "riscv64-unknown-linux-gnu-ld"
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rustflags = [
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"-C",
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"link-arg=-static",
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"-C",
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"link-arg=-nostdlib",
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"-C",
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"relocation-model=static",
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"-C",
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"link-arg=-T./linker.ld",
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]
+1
kernel/.gitignore
+1
kernel/.gitignore
···
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/target
+32
kernel/Cargo.lock
+32
kernel/Cargo.lock
···
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# This file is automatically @generated by Cargo.
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# It is not intended for manual editing.
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version = 4
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[[package]]
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name = "cc"
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version = "1.2.30"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "deec109607ca693028562ed836a5f1c4b8bd77755c4e132fc5ce11b0b6211ae7"
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dependencies = [
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"shlex",
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]
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+
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[[package]]
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name = "fdt"
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version = "0.1.5"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "784a4df722dc6267a04af36895398f59d21d07dce47232adf31ec0ff2fa45e67"
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+
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[[package]]
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name = "kernel"
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version = "0.1.0"
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dependencies = [
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"cc",
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"fdt",
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]
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+
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[[package]]
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name = "shlex"
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version = "1.3.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "0fda2ff0d084019ba4d7c6f371c95d8fd75ce3524c3cb8fb653a3023f6323e64"
+19
kernel/Cargo.toml
+19
kernel/Cargo.toml
···
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[package]
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name = "kernel"
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version = "0.1.0"
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edition = "2024"
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test = false
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bench = false
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+
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[dependencies]
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fdt = "0.1.5"
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+
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[build-dependencies]
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cc = "1.2.30"
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[profile.dev]
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panic = "abort"
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+
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[profile.release]
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panic = "abort"
+7
kernel/build.rs
+7
kernel/build.rs
+2
kernel/justfile
+2
kernel/justfile
+21
kernel/linker.ld
+21
kernel/linker.ld
+3
kernel/rust-toolchain.toml
+3
kernel/rust-toolchain.toml
+17
kernel/src/kernel.s
+17
kernel/src/kernel.s
···
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.section .text
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.globl _start
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_start:
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# Set up stack pointer (adjust as you want)
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la sp, stack_top
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+
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# Call rust_main (extern function)
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call rust_main
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+
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# Infinite loop after kmain returns
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1: j 1b
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+
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.section .bss
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.align 12 # 2^12 = 4096 bytes stack alignment
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.space 0x4000 # 16KB stack
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+
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stack_top:
+39
kernel/src/main.rs
+39
kernel/src/main.rs
···
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#![no_std]
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#![no_main]
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+
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use core::panic::PanicInfo;
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+
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use fdt::Fdt;
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+
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pub mod uart;
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+
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// Debugging
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const CLINT: usize = 0x0200_0000;
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const MTIME: *const u64 = (CLINT + 0xBFF8) as *const u64;
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+
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pub fn read_mtime() -> u64 {
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unsafe { core::ptr::read_volatile(MTIME) }
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}
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+
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pub fn get_uart_address(device_tree: usize) {
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// fdt::node::Fdt::
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}
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+
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#[unsafe(no_mangle)]
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pub extern "C" fn rust_main(_hartid: usize, _dtb: usize) -> ! {
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uprintln!("Hello RiscV :3");
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+
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unsafe {
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let fdt = Fdt::from_ptr(_dtb as *const u8).ok().unwrap();
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}
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+
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#[allow(clippy::empty_loop)]
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loop {}
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}
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+
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#[panic_handler]
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fn panic(_info: &PanicInfo) -> ! {
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uprintln!("Woopsie we panicked :<");
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+
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loop {}
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}
+50
kernel/src/uart.rs
+50
kernel/src/uart.rs
···
1
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use core::fmt::{self, Write};
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+
3
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const UART: usize = 0x1000_0000;
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const UART_STATUS: usize = UART + 0x5;
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const MASK: u8 = 1 << 5;
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+
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pub struct Uart;
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+
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impl Uart {
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pub fn write_byte(src: u8) {
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unsafe {
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let status = UART_STATUS as *mut u8;
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let reg = UART as *mut u8;
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+
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while core::ptr::read_volatile(status) & MASK == 0 {}
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+
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core::ptr::write_volatile(reg, src);
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}
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}
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+
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pub fn print(args: fmt::Arguments) {
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Uart.write_fmt(args).ok();
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}
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}
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+
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impl Write for Uart {
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fn write_str(&mut self, s: &str) -> core::fmt::Result {
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for byte in s.as_bytes() {
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Self::write_byte(*byte);
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}
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Ok(())
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+
}
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+
}
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+
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#[macro_export]
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macro_rules! uprint {
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($($arg:tt)*) => {{
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$crate::uart::Uart::print(core::format_args!($($arg)*));
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}};
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}
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+
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#[macro_export]
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macro_rules! uprintln {
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() => {
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$crate::uprint!("\n")
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+
};
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($($arg:tt)*) => {{
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uprint!("{}\n", core::format_args!($($arg)*));
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}}
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+
}
+41
shell.nix
+41
shell.nix
···
1
+
let
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rust_overlay = import (
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fetchTarball "https://github.com/oxalica/rust-overlay/archive/master.tar.gz"
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+
);
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+
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pkgs = import <nixpkgs> {
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+
overlays = [
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rust_overlay
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+
(_: prev: {
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+
riscv-rust = prev.rust-bin.stable.latest.default.override {
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+
extensions = [
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+
"rust-src"
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+
"rust-analyzer"
14
+
"clippy"
15
+
];
16
+
targets = [ "riscv64gc-unknown-linux-gnu" ];
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+
};
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+
})
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+
];
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+
};
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+
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+
riscv-toolchain = import <nixpkgs> {
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+
localSystem = "x86_64-linux";
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+
crossSystem = {
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+
config = "riscv64-unknown-linux-gnu";
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+
};
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+
};
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+
in
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+
pkgs.mkShell {
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+
nativeBuildInputs = with pkgs; [
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+
git
32
+
riscv-toolchain.buildPackages.gcc
33
+
python312
34
+
dtc
35
+
riscv-rust
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+
];
37
+
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+
shellHook = ''
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+
echo "`git --version`"
40
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'';
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+
}