1 files changed, 24 insertions, 0 deletions
diff --git a/kernel/src/init/earlyprintk.rs b/kernel/src/init/earlyprintk.rs
new file mode 100644
index 0000000..01c50fa
--- /dev/null
+++ b/kernel/src/init/earlyprintk.rs
@@ -0,0 +1,24 @@
+use spin::{lazylock::LazyLock, mutex::Mutex};
+
+use crate::io::output::serial::uart_16550::{SerialPortBitMask, Uart16550};
+
+// TODO: use linkme instead
+pub static EARLY_PRINTK_SERIAL: LazyLock<Mutex<Uart16550>> = LazyLock::new(|| {
+    Mutex::new(unsafe { Uart16550::init(SerialPortBitMask::COM1, [const { None }; 4]).unwrap() })
+});
+
+#[macro_export]
+macro_rules! printk {
+	($($arg:tt)*) => ({
+		use ::core::fmt::Write;
+		write!($crate::init::earlyprintk::EARLY_PRINTK_SERIAL.lock().coms[0].as_mut().unwrap(), $($arg)*)
+	});
+}
+
+#[macro_export]
+macro_rules! printkln {
+	($($arg:tt)*) => ({
+		use ::core::fmt::Write;
+		writeln!($crate::init::earlyprintk::EARLY_PRINTK_SERIAL.lock().coms[0].as_mut().unwrap(), $($arg)*)
+	});
+}