#ifndef __ASM_I8253_H
#define __ASM_I8253_H
+#include <linux/spinlock.h>
+
/* i8253A PIT registers */
#define PIT_MODE 0x43
#define PIT_CH0 0x40
#define PIT_CH2 0x42
+#define PIT_TICK_RATE 1193182UL
+
+extern spinlock_t i8253_lock;
+
extern void setup_pit_timer(void);
#endif /* __ASM_I8253_H */