First commit

src/main.rs

@@ -0,0 +1,42 @@
+#![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") }
+    }
+}