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30 lines
809 B
30 lines
809 B
/* |
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* This file is subject to the terms and conditions of the GNU General Public |
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* License. See the file "COPYING" in the main directory of this archive |
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* for more details. |
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* |
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* Machine specific IO port address definition for generic. |
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* Written by Osamu Tomita <[email protected]> |
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*/ |
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#ifndef __LINUX_I8253_H |
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#define __LINUX_I8253_H |
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#include <linux/param.h> |
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#include <linux/spinlock.h> |
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#include <linux/timex.h> |
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/* i8253A PIT registers */ |
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#define PIT_MODE 0x43 |
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#define PIT_CH0 0x40 |
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#define PIT_CH2 0x42 |
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#define PIT_LATCH ((PIT_TICK_RATE + HZ/2) / HZ) |
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extern raw_spinlock_t i8253_lock; |
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extern bool i8253_clear_counter_on_shutdown; |
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extern struct clock_event_device i8253_clockevent; |
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extern void clockevent_i8253_init(bool oneshot); |
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extern void setup_pit_timer(void); |
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#endif /* __LINUX_I8253_H */
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