/* SPDX-License-Identifier: GPL-2.0 */ /* * Copyright (C) 2012 - 2014 Cisco Systems * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) */ #ifndef __TIMER_INTERNAL_H__ #define __TIMER_INTERNAL_H__ #include <linux/list.h> #include <asm/bug.h> #define TIMER_MULTIPLIER 256 #define TIMER_MIN_DELTA 500 enum time_travel_mode { TT_MODE_OFF, TT_MODE_BASIC, TT_MODE_INFCPU, TT_MODE_EXTERNAL, }; #ifdef CONFIG_UML_TIME_TRAVEL_SUPPORT struct time_travel_event { unsigned long long time; void (*fn)(struct time_travel_event *d); struct list_head list; bool pending, onstack; }; extern enum time_travel_mode time_travel_mode; void time_travel_sleep(void); static inline void time_travel_set_event_fn(struct time_travel_event *e, void (*fn)(struct time_travel_event *d)) { e->fn = fn; } void __time_travel_propagate_time(void); static inline void time_travel_propagate_time(void) { if (time_travel_mode == TT_MODE_EXTERNAL) __time_travel_propagate_time(); } void __time_travel_wait_readable(int fd); static inline void time_travel_wait_readable(int fd) { if (time_travel_mode == TT_MODE_EXTERNAL) __time_travel_wait_readable(fd); } void time_travel_add_irq_event(struct time_travel_event *e); void time_travel_add_event_rel(struct time_travel_event *e, unsigned long long delay_ns); bool time_travel_del_event(struct time_travel_event *e); #else struct time_travel_event { }; #define time_travel_mode TT_MODE_OFF static inline void time_travel_sleep(void) { } /* this is a macro so the event/function need not exist */ #define time_travel_set_event_fn(e, fn) do {} while (0) static inline void time_travel_propagate_time(void) { } static inline void time_travel_wait_readable(int fd) { } static inline void time_travel_add_irq_event(struct time_travel_event *e) { WARN_ON(1); } /* * not inlines so the data structure need not exist, * cause linker failures */ extern void time_travel_not_configured(void); #define time_travel_add_event_rel(...) time_travel_not_configured() #define time_travel_del_event(...) time_travel_not_configured() #endif /* CONFIG_UML_TIME_TRAVEL_SUPPORT */ /* * Without CONFIG_UML_TIME_TRAVEL_SUPPORT this is a linker error if used, * which is intentional since we really shouldn't link it in that case. */ void time_travel_ndelay(unsigned long nsec); #endif /* __TIMER_INTERNAL_H__ */