Adds syscall for sleep and print and makes process work in user mode

src/main.rs

@@ -1,18 +1,22 @@
 #![no_std]
 #![no_main]
 #![allow(static_mut_refs)]
-#![feature(riscv_ext_intrinsics, const_trait_impl, iter_map_windows)]
-
-use core::{arch::riscv64::wfi, time::Duration};
+#![feature(
+    riscv_ext_intrinsics,
+    const_trait_impl,
+    iter_map_windows,
+    str_from_raw_parts
+)]
 
 use embedded_alloc::LlffHeap as Heap;
 use log::info;
 
 use crate::{
     io::init_log,
-    process::{create_processus, sleep},
+    process::create_processus,
     riscv::enable_supervisor_interrupt,
     scheduler::{idle, scheduler_init},
+    user::{proc2, test},
     vga::{Color, Vga},
 };
 
@@ -26,31 +30,18 @@ mod panic_handler;
 mod process;
 mod riscv;
 mod scheduler;
+mod syscall;
 mod time;
 mod uart;
+mod user;
 mod vga;
 
 pub const HEAP_SIZE: usize = 4096;
 #[global_allocator]
 static HEAP: Heap = Heap::empty();
 
-extern "C" fn test() {
-    loop {
-        info!("test");
-        enable_supervisor_interrupt();
-        sleep(Duration::new(2, 0));
-        unsafe { wfi() };
-    }
-}
-
-extern "C" fn proc2() {
-    loop {
-        info!("proc2");
-        enable_supervisor_interrupt();
-        sleep(Duration::new(3, 0));
-        unsafe { wfi() };
-    }
-}
+// Usize is assumed to be an u64 in the whole kernel
+const _: () = assert!(size_of::<usize>() == size_of::<u64>());
 
 #[unsafe(no_mangle)]
 pub extern "C" fn supervisor_mode_entry() {
@@ -59,7 +50,7 @@ pub extern "C" fn supervisor_mode_entry() {
         init_log().unwrap();
         Vga::init();
         scheduler_init();
-        enable_supervisor_interrupt();
+        // enable_supervisor_interrupt();
     }
 
     info!("Hello World !");
@@ -68,5 +59,6 @@ pub extern "C" fn supervisor_mode_entry() {
     create_processus(test, "proc1");
     create_processus(proc2, "proc2");
 
+    enable_supervisor_interrupt();
     idle();
 }