[deliverable/linux.git] / include / linux / i8253.h

/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 *  Machine specific IO port address definition for generic.
 *  Written by Osamu Tomita <tomita@cinet.co.jp>
 */
#ifndef __LINUX_I8253_H
#define __LINUX_I8253_H

#include <linux/param.h>
#include <linux/spinlock.h>
#include <linux/timex.h>

/* i8253A PIT registers */
#define PIT_MODE	0x43
#define PIT_CH0		0x40
#define PIT_CH2		0x42

#define PIT_LATCH	((PIT_TICK_RATE + HZ/2) / HZ)

extern raw_spinlock_t i8253_lock;
extern struct clock_event_device i8253_clockevent;
extern void clockevent_i8253_init(bool oneshot);

extern void setup_pit_timer(void);

#endif /* __LINUX_I8253_H */
Commit	Line	Data
334955ef RB	1	/*
	2	* This file is subject to the terms and conditions of the GNU General Public
	3	* License. See the file "COPYING" in the main directory of this archive
	4	* for more details.
cb2455aa RB	5	*
	6	* Machine specific IO port address definition for generic.
	7	* Written by Osamu Tomita <tomita@cinet.co.jp>
334955ef RB	8	*/
	9	#ifndef __LINUX_I8253_H
	10	#define __LINUX_I8253_H
	11
49cf3f29	12	#include <linux/param.h>
cb2455aa	13	#include <linux/spinlock.h>
49cf3f29	14	#include <linux/timex.h>
334955ef	15
cb2455aa RB	16	/* i8253A PIT registers */
	17	#define PIT_MODE 0x43
	18	#define PIT_CH0 0x40
	19	#define PIT_CH2 0x42
	20
49cf3f29 RB	21	#define PIT_LATCH ((PIT_TICK_RATE + HZ/2) / HZ)
49cf3f29 RB	22
cb2455aa	23	extern raw_spinlock_t i8253_lock;
e6220bdc TG	24	extern struct clock_event_device i8253_clockevent;
e6220bdc TG	25	extern void clockevent_i8253_init(bool oneshot);
cb2455aa	26
85049276 RB	27	extern void setup_pit_timer(void);
85049276 RB	28
334955ef	29	#endif /* __LINUX_I8253_H */