i8253.h

来自「linux 内核源代码」· C头文件 代码 · 共 22 行

/*
 *  Machine specific IO port address definition for generic.
 *  Written by Osamu Tomita <[e-mail]>
 */
#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 */