Supervisor mode

src/main.rs

@@ -1,13 +1,16 @@
 #![no_std]
 #![no_main]
+#![allow(static_mut_refs)]
+#![feature(riscv_ext_intrinsics)]
 
-use core::arch::asm;
+use core::arch::riscv64::wfi;
 
 use embedded_alloc::LlffHeap as Heap;
 use log::info;
 
 use crate::{
     io::init_log,
+    riscv::enable_supervisor_interrupt,
     vga::{Color, Vga},
 };
 
@@ -15,9 +18,11 @@ extern crate alloc;
 
 mod boot;
 mod critical_section;
+mod interrupt;
 mod io;
 mod panic_handler;
 mod riscv;
+mod time;
 mod uart;
 mod vga;
 
@@ -26,17 +31,18 @@ pub const HEAP_SIZE: usize = 40960;
 static HEAP: Heap = Heap::empty();
 
 #[unsafe(no_mangle)]
-pub extern "C" fn main() {
+pub extern "C" fn supervisor_mode_entry() {
     unsafe {
         embedded_alloc::init!(HEAP, HEAP_SIZE);
+        init_log().unwrap();
+        Vga::init();
+        enable_supervisor_interrupt();
     }
-    init_log().unwrap();
-    Vga::init();
 
     info!("Hello World !");
-    unsafe { Vga::draw_string(10, 10, "Hello World !", Color::WHITE) };
+    unsafe { Vga::draw_string(10, 10, "Hello World !", Color::WHITE, Color::BLACK) };
 
     loop {
-        unsafe { asm!("wfi") }
+        unsafe { wfi() }
     }
 }