kernel: initial timer abstraction

kernel-src/include/kernel/timer.h

@@ -0,0 +1,26 @@
+#ifndef _TIMER_H
+#define _TIMER_H
+
+#include <time.h>
+#include <arch/context.h>
+
+typedef struct timerentry_t {
+	struct timerentry_t *next;
+	time_t absolutetick;
+	void *private;
+	void (*func)(void *private, context_t* context);
+} timerentry_t;
+
+typedef struct {
+	time_t ticksperus;
+	time_t tickcurrent;
+	void (*arm)(time_t);
+	time_t (*stop)();
+	timerentry_t *queue;
+} timer_t;
+
+void timer_isr(timer_t *timer, context_t *context);
+void timer_insert(timer_t *timer, timerentry_t *entry, time_t us);
+timer_t *timer_new(time_t ticksperus, void (*arm)(time_t), time_t (*stop)());
+
+#endif