85 lines
1.9 KiB
Rust
85 lines
1.9 KiB
Rust
#![allow(non_snake_case)]
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#![no_std]
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#![no_main]
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#![feature(custom_test_frameworks)]
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#![test_runner(crate::test_runner)]
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#![reexport_test_harness_main = "test_main"]
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#![feature(abi_x86_interrupt)]
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mod gdt;
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mod interrupts;
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mod shell;
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mod vga_buffer;
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mod memory;
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use core::panic::PanicInfo;
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use bootloader::BootInfo;
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#[panic_handler]
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fn panic(info: &PanicInfo) -> ! {
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println!("{}", info);
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loop {}
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}
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fn init() {
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gdt::init_gdt();
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interrupts::init();
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}
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#[no_mangle]
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pub extern "C" fn _start(boot_info: &'static BootInfo) {
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use crate::vga_buffer::{change_color, Color};
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use x86_64::{VirtAddr, structures::paging::Translate};
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init();
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print!("[ ");
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change_color(Color::Green, Color::Black);
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print!("OK");
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change_color(Color::White, Color::Black);
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println!(" ] Initialized GDT and interrupts");
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let phys_mem_offset = VirtAddr::new(boot_info.physical_memory_offset);
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let mapper = unsafe { memory::init(phys_mem_offset) };
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let addresses = [
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// the identity-mapped vga buffer page
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0xb8000,
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// some code page
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0x201008,
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// some stack page
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0x0100_0020_1a10,
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// virtual address mapped to physical address 0
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boot_info.physical_memory_offset,
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];
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for &address in &addresses {
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let virt = VirtAddr::new(address);
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let phys = mapper.translate_addr(virt);
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println!("{:?} -> {:?}", virt, phys);
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}
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print!("Welcome to ");
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change_color(Color::Blue, Color::Black);
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println!("KarxOS!");
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change_color(Color::White, Color::Black);
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// First prompt, future prompts will be handled by shell::evaluate
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print!(">>> ");
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#[cfg(test)]
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test_main();
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loop {
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// Halt CPU so that usage isn't 100% all the time
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x86_64::instructions::hlt();
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}
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}
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#[cfg(test)]
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fn test_runner(tests: &[&dyn Fn()]) {
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println!("Running {} tests", tests.len());
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for test in tests {
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test();
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}
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}
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