forked from mirrors/linux
b6ecfa9273
In case mod_virt_timer is used to add a non pending timer the timer is always added as a one-shot timer. If mod_virt_timer is used for periodic timers they may therfore be degraded to one-shot timers. Add mod_virt_timer_periodic to the interface to allow safe re-programming of the interval value. Signed-off-by: Jan Glauber <jang@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
55 lines
1.3 KiB
C
55 lines
1.3 KiB
C
/*
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* include/asm-s390/timer.h
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*
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* (C) Copyright IBM Corp. 2003,2006
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* Virtual CPU timer
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*
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* Author: Jan Glauber (jang@de.ibm.com)
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*/
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#ifndef _ASM_S390_TIMER_H
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#define _ASM_S390_TIMER_H
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#ifdef __KERNEL__
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#include <linux/timer.h>
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#define VTIMER_MAX_SLICE (0x7ffffffffffff000LL)
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struct vtimer_list {
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struct list_head entry;
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int cpu;
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__u64 expires;
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__u64 interval;
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void (*function)(unsigned long);
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unsigned long data;
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};
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/* the vtimer value will wrap after ca. 71 years */
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struct vtimer_queue {
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struct list_head list;
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spinlock_t lock;
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__u64 timer; /* last programmed timer */
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__u64 elapsed; /* elapsed time of timer expire values */
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__u64 idle; /* temp var for idle */
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int do_spt; /* =1: reprogram cpu timer in idle */
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};
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extern void init_virt_timer(struct vtimer_list *timer);
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extern void add_virt_timer(void *new);
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extern void add_virt_timer_periodic(void *new);
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extern int mod_virt_timer(struct vtimer_list *timer, __u64 expires);
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extern int mod_virt_timer_periodic(struct vtimer_list *timer, __u64 expires);
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extern int del_virt_timer(struct vtimer_list *timer);
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extern void init_cpu_vtimer(void);
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extern void vtime_init(void);
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extern void vtime_stop_cpu(void);
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extern void vtime_start_leave(void);
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#endif /* __KERNEL__ */
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#endif /* _ASM_S390_TIMER_H */
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