LXR linux/arch/um/include/linux/time-internal.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2/*
   3 * Copyright (C) 2012 - 2014 Cisco Systems
   4 * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
   5 */
   6
   7#ifndef __TIMER_INTERNAL_H__
   8#define __TIMER_INTERNAL_H__
   9#include <linux/list.h>
  10#include <asm/bug.h>
  11#include <shared/timetravel.h>
  12
  13#define TIMER_MULTIPLIER 256
  14#define TIMER_MIN_DELTA  500
  15
  16#ifdef CONFIG_UML_TIME_TRAVEL_SUPPORT
  17struct time_travel_event {
  18        unsigned long long time;
  19        void (*fn)(struct time_travel_event *d);
  20        struct list_head list;
  21        bool pending, onstack;
  22};
  23
  24void time_travel_sleep(void);
  25
  26static inline void
  27time_travel_set_event_fn(struct time_travel_event *e,
  28                         void (*fn)(struct time_travel_event *d))
  29{
  30        e->fn = fn;
  31}
  32
  33void __time_travel_propagate_time(void);
  34
  35static inline void time_travel_propagate_time(void)
  36{
  37        if (time_travel_mode == TT_MODE_EXTERNAL)
  38                __time_travel_propagate_time();
  39}
  40
  41void __time_travel_wait_readable(int fd);
  42
  43static inline void time_travel_wait_readable(int fd)
  44{
  45        if (time_travel_mode == TT_MODE_EXTERNAL)
  46                __time_travel_wait_readable(fd);
  47}
  48
  49void time_travel_add_irq_event(struct time_travel_event *e);
  50void time_travel_add_event_rel(struct time_travel_event *e,
  51                               unsigned long long delay_ns);
  52bool time_travel_del_event(struct time_travel_event *e);
  53#else
  54struct time_travel_event {
  55};
  56
  57static inline void time_travel_sleep(void)
  58{
  59}
  60
  61/* this is a macro so the event/function need not exist */
  62#define time_travel_set_event_fn(e, fn) do {} while (0)
  63
  64static inline void time_travel_propagate_time(void)
  65{
  66}
  67
  68static inline void time_travel_wait_readable(int fd)
  69{
  70}
  71
  72static inline void time_travel_add_irq_event(struct time_travel_event *e)
  73{
  74        WARN_ON(1);
  75}
  76
  77/*
  78 * not inlines so the data structure need not exist,
  79 * cause linker failures
  80 */
  81extern void time_travel_not_configured(void);
  82#define time_travel_add_event_rel(...) time_travel_not_configured()
  83#define time_travel_del_event(...) time_travel_not_configured()
  84#endif /* CONFIG_UML_TIME_TRAVEL_SUPPORT */
  85
  86/*
  87 * Without CONFIG_UML_TIME_TRAVEL_SUPPORT this is a linker error if used,
  88 * which is intentional since we really shouldn't link it in that case.
  89 */
  90void time_travel_ndelay(unsigned long nsec);
  91#endif /* __TIMER_INTERNAL_H__ */
  92