#![no_std]
#![no_main]

use core::arch::asm;

use embedded_alloc::LlffHeap as Heap;
use log::info;

use crate::{
    io::init_log,
    vga::{Color, Vga},
};

extern crate alloc;

mod boot;
mod critical_section;
mod io;
mod panic_handler;
mod riscv;
mod uart;
mod vga;

pub const HEAP_SIZE: usize = 40960;
#[global_allocator]
static HEAP: Heap = Heap::empty();

#[unsafe(no_mangle)]
pub extern "C" fn main() {
    unsafe {
        embedded_alloc::init!(HEAP, HEAP_SIZE);
    }
    init_log().unwrap();
    Vga::init();

    info!("Hello World !");
    unsafe { Vga::draw_string(10, 10, "Hello World !", Color::WHITE) };

    loop {
        unsafe { asm!("wfi") }
    }
}