| /* |
| * 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 */ |
