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1 #ifndef __ASM_I8253_H__
2 #define __ASM_I8253_H__
3
4 /* i8253A PIT registers */
5 #define PIT_MODE                0x43
6 #define PIT_CH0                 0x40
7 #define PIT_CH2                 0x42
8
9 extern spinlock_t i8253_lock;
10
11 #ifdef CONFIG_GENERIC_CLOCKEVENTS
12
13 extern struct clock_event_device *global_clock_event;
14
15 extern void setup_pit_timer(void);
16
17 #endif
18
19 #endif  /* __ASM_I8253_H__ */