1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * Copyright (C) 2001, 2002, MontaVista Software Inc.
5 * Copyright (c) 2003 Maciej W. Rozycki
7 * include/asm-mips/time.h
8 * header file for the new style time.c file and time services.
13 #include <linux/rtc.h>
14 #include <linux/spinlock.h>
15 #include <linux/clockchips.h>
16 #include <linux/clocksource.h>
18 extern spinlock_t rtc_lock;
21 * board specific routines required by time_init().
23 extern void plat_time_init(void);
26 * mips_hpt_frequency - must be set if you intend to use an R4k-compatible
27 * counter as a timer interrupt source.
29 extern unsigned int mips_hpt_frequency;
32 * The performance counter IRQ on MIPS is a close relative to the timer IRQ
35 extern int (*perf_irq)(void);
36 extern int __weak get_c0_perfcount_int(void);
39 * Initialize the calling CPU's compare interrupt as clockevent device
41 extern unsigned int get_c0_compare_int(void);
42 extern int r4k_clockevent_init(void);
44 static inline int mips_clockevent_init(void)
46 #ifdef CONFIG_CEVT_R4K
47 return r4k_clockevent_init();
54 * Initialize the count register as a clocksource
56 extern int init_r4k_clocksource(void);
58 static inline int init_mips_clocksource(void)
60 #ifdef CONFIG_CSRC_R4K
61 return init_r4k_clocksource();
67 static inline void clockevent_set_clock(struct clock_event_device *cd,
70 clockevents_calc_mult_shift(cd, clock, 4);
73 #endif /* _ASM_TIME_H */