feat: implement MI Timer Subsystem with initialization and tick handling

1 files changed, 24 insertions, 0 deletions

diff --git a/na/include/lume/timer.h b/na/include/lume/timer.h
new file mode 100644
index 0000000..e7de2f1
--- /dev/null
+++ b/na/include/lume/timer.h
@@ -0,0 +1,24 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/* Copyright (C) 2026 Richard Qin */
+
+#pragma once
+
+#include <lume/types.h>
+
+/*
+ * MI Timer Subsystem
+ */
+
+extern uint64 g_jiffies;
+
+// BSP global initialization
+void timer_init();
+
+// AP per-CPU initialization
+void timer_init_ap();
+
+// Handle timer interrupt tick (called from TrapHandler)
+void timer_tick();
+
+// Get configured timebase frequency
+uint64 timer_get_freq();