]>
Commit | Line | Data |
---|---|---|
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. | |
5 | * | |
6 | * Machine specific IO port address definition for generic. | |
7 | * Written by Osamu Tomita <tomita@cinet.co.jp> | |
8 | */ | |
9 | #ifndef __LINUX_I8253_H | |
10 | #define __LINUX_I8253_H | |
11 | ||
12 | #include <linux/param.h> | |
13 | #include <linux/spinlock.h> | |
14 | #include <linux/timex.h> | |
15 | ||
16 | /* i8253A PIT registers */ | |
17 | #define PIT_MODE 0x43 | |
18 | #define PIT_CH0 0x40 | |
19 | #define PIT_CH2 0x42 | |
20 | ||
21 | #define PIT_LATCH ((PIT_TICK_RATE + HZ/2) / HZ) | |
22 | ||
23 | extern raw_spinlock_t i8253_lock; | |
24 | extern struct clock_event_device i8253_clockevent; | |
25 | extern void clockevent_i8253_init(bool oneshot); | |
26 | ||
27 | extern void setup_pit_timer(void); | |
28 | ||
29 | #endif /* __LINUX_I8253_H */ |