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a1b2dde704
Some subsystems (KVM for example) need access to a cycle counter. In the KVM case, this is used to measure the time delta between host and guest in order to accurately generate timer events for the guest. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
30 lines
555 B
C
30 lines
555 B
C
#ifndef __ASMARM_ARCH_TIMER_H
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#define __ASMARM_ARCH_TIMER_H
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#include <asm/errno.h>
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#include <linux/clocksource.h>
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#ifdef CONFIG_ARM_ARCH_TIMER
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#define ARCH_HAS_READ_CURRENT_TIMER
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int arch_timer_of_register(void);
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int arch_timer_sched_clock_init(void);
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struct timecounter *arch_timer_get_timecounter(void);
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#else
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static inline int arch_timer_of_register(void)
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{
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return -ENXIO;
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}
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static inline int arch_timer_sched_clock_init(void)
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{
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return -ENXIO;
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}
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static inline struct timecounter *arch_timer_get_timecounter(void)
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{
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return NULL;
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}
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#endif
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#endif
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