0190dae54d
PIT clock events work already and the PIT handling is the same for i386 and x86_64. x86_64 does not support PIT as a clock source, so disable the PIT clocksource for x86_64. Use the i386 i8253.h include file for x86_64 as well to share the exports and the PIT constants. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Chris Wright <chrisw@sous-sol.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
24 lines
395 B
C
24 lines
395 B
C
#ifndef __ASM_I8253_H__
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#define __ASM_I8253_H__
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#ifdef CONFIG_X86_64
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# include <asm/8253pit.h>
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#endif
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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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extern spinlock_t i8253_lock;
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#ifdef CONFIG_GENERIC_CLOCKEVENTS
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extern struct clock_event_device *global_clock_event;
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extern void setup_pit_timer(void);
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#endif
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#endif /* __ASM_I8253_H__ */
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