From 4820b2dd73543a6fbd5db547d009529d0fe11ccd Mon Sep 17 00:00:00 2001
From: littleblack111 <littleblack11111@gmail.com>
Date: Sun, 6 Sep 2026 18:07:30 +0800
Subject: new: earlyprintk

---
 kernel/src/init/acpi.rs        |  0
 kernel/src/init/earlyprintk.rs | 24 ++++++++++++++++++++++++
 2 files changed, 24 insertions(+)
 create mode 100644 kernel/src/init/acpi.rs
 create mode 100644 kernel/src/init/earlyprintk.rs

(limited to 'kernel/src/init')

diff --git a/kernel/src/init/acpi.rs b/kernel/src/init/acpi.rs
new file mode 100644
index 0000000..e69de29
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)*)
+	});
+}
-- 
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