Added bootloader

bootloader/src/os/bios/macros.rs

@@ -0,0 +1,20 @@
+/// Print to console
+#[macro_export]
+macro_rules! print {
+    ($($arg:tt)*) => ({
+        use core::fmt::Write;
+        #[cfg(feature = "serial_debug")]
+        {
+            let _ = write!($crate::os::serial::COM1.lock(), $($arg)*);
+        }
+        let _ = write!($crate::os::VGA.lock(), $($arg)*);
+    });
+}
+
+/// Print with new line to console
+#[macro_export]
+macro_rules! println {
+    () => (print!("\n"));
+    ($fmt:expr) => (print!(concat!($fmt, "\n")));
+    ($fmt:expr, $($arg:tt)*) => (print!(concat!($fmt, "\n"), $($arg)*));
+}