common: add a logo

kernel/src/arch/aarch64/mod.rs

@@ -19,6 +19,8 @@ pub extern "C" fn rust_main() -> ! {
     // First init log mod, so that we can print log info.
     ::logging::init();
 
+    super::fs::show_logo();
+
     loop {
         print!(">> ");
         loop {

kernel/src/fs.rs

@@ -14,7 +14,21 @@ _binary_user_riscv_img_start:
 _binary_user_riscv_img_end:
 "#);
 
+const LOGO: &str = r#"
+    ____                __   ____  _____
+   / __ \ __  __ _____ / /_ / __ \/ ___/
+  / /_/ // / / // ___// __// / / /\__ \
+ / _, _// /_/ /(__  )/ /_ / /_/ /___/ /
+/_/ |_| \__,_//____/ \__/ \____//____/
+"#;
+
+pub fn show_logo() {
+    println!("{}", LOGO);
+}
+
 pub fn shell() {
+    show_logo();
+
     #[cfg(target_arch = "riscv32")]
     let device = {
         extern {