73 lines
2.0 KiB
Rust
73 lines
2.0 KiB
Rust
#![no_std]
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#![no_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 memory;
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mod serial;
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mod vga;
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extern crate multiboot2;
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use core::panic::PanicInfo;
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use vga::{Color, ColorCode};
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#[panic_handler]
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fn panic_handler(info: &PanicInfo) -> ! {
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vga::change_color(ColorCode::new(Color::LightRed, Color::Black));
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println!("{}", info);
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hlt_loop();
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}
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pub fn hlt_loop() -> ! {
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loop {
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x86_64::instructions::hlt();
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}
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}
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pub fn init() {
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vga::change_color(ColorCode::new(Color::LightCyan, Color::Black));
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println!("Starting init");
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gdt::init_gdt();
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interrupts::init_idt();
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vga::change_color(ColorCode::new(Color::LightGreen, Color::Black));
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}
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fn get_frame_allocator(multiboot_info_addr: usize) -> memory::AreaFrameAllocator {
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let boot_info = unsafe { multiboot2::load(multiboot_info_addr) };
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let memory_map_tag = boot_info.memory_map_tag().expect("Memory map tag required");
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let elf_sections_tag = boot_info
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.elf_sections_tag()
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.expect("Elf-sections tag required");
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let kernel_start: u64 = elf_sections_tag.sections().map(|s| s.addr).min().unwrap();
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let kernel_end: u64 = elf_sections_tag
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.sections()
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.map(|s| s.addr + s.size)
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.max()
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.unwrap();
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let multiboot_start: u64 = multiboot_info_addr as u64;
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let multiboot_end: u64 = multiboot_start + (boot_info.total_size as u64);
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memory::AreaFrameAllocator::new( kernel_start, kernel_end, multiboot_start,
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multiboot_end, memory_map_tag.memory_areas())
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}
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#[no_mangle]
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pub extern "C" fn julios_main(multiboot_info_addr: usize) -> ! {
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let boot_info = unsafe { multiboot2::load(multiboot_info_addr) };
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let mut frame_allocator = get_frame_allocator(multiboot_info_addr);
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memory::kernel_remap(&mut frame_allocator, boot_info);
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init();
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println!("***JuliOS V0.1.0***");
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serial_println!("Hello serial");
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memory::paging::test_paging(&mut frame_allocator);
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panic!("Kernel end of flow");
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}
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