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- /*
- * 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 bool i8253_clear_counter_on_shutdown;
- extern struct clock_event_device i8253_clockevent;
- extern void clockevent_i8253_init(bool oneshot);
- extern void setup_pit_timer(void);
- #endif /* __LINUX_I8253_H */
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