#ifndef __ASM_I8253_H__
#define __ASM_I8253_H__
+#include <linux/clockchips.h>
+
+/* i8253A PIT registers */
+#define PIT_MODE 0x43
+#define PIT_CH0 0x40
+#define PIT_CH2 0x42
+
extern spinlock_t i8253_lock;
+extern struct clock_event_device *global_clock_event;
+
+extern void setup_pit_timer(void);
+
#endif /* __ASM_I8253_H__ */