linux/include/asm-x86/i8253.h

#ifndef __ASM_I8253_H__
#define __ASM_I8253_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__ */
i386: prepare sharing the PIT code PIT clock events work already and the PIT handling is the same for i386 and x86_64. x86_64 does not support PIT as a clock source, so disable the PIT clocksource for x86_64. Use the i386 i8253.h include file for x86_64 as well to share the exports and the PIT constants. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Chris Wright <chrisw@sous-sol.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> 2007-10-12 21:04:06 +00:00			`#ifndef __ASM_I8253_H__`
			`#define __ASM_I8253_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__ */`