1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * Copyright (C) 2001, 2002, MontaVista Software Inc.
4 * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
5 * Copyright (c) 2003  Maciej W. Rozycki
6 *
7 * include/asm-mips/time.h
8 *     header file for the new style time.c file and time services.
9 */
10#ifndef _ASM_TIME_H
11#define _ASM_TIME_H
12
13#include <linux/rtc.h>
14#include <linux/spinlock.h>
15#include <linux/clockchips.h>
16#include <linux/clocksource.h>
17
18extern spinlock_t rtc_lock;
19
20/*
21 * board specific routines required by time_init().
22 */
23extern void plat_time_init(void);
24
25/*
26 * mips_hpt_frequency - must be set if you intend to use an R4k-compatible
27 * counter as a timer interrupt source.
28 */
29extern unsigned int mips_hpt_frequency;
30
31/*
32 * The performance counter IRQ on MIPS is a close relative to the timer IRQ
33 * so it lives here.
34 */
35extern int (*perf_irq)(void);
36extern int __weak get_c0_perfcount_int(void);
37
38/*
39 * Initialize the calling CPU's compare interrupt as clockevent device
40 */
41extern unsigned int get_c0_compare_int(void);
42extern int r4k_clockevent_init(void);
43
44static inline int mips_clockevent_init(void)
45{
46#ifdef CONFIG_CEVT_R4K
47	return r4k_clockevent_init();
48#else
49	return -ENXIO;
50#endif
51}
52
53/*
54 * Initialize the count register as a clocksource
55 */
56extern int init_r4k_clocksource(void);
57
58static inline int init_mips_clocksource(void)
59{
60#ifdef CONFIG_CSRC_R4K
61	return init_r4k_clocksource();
62#else
63	return 0;
64#endif
65}
66
67static inline void clockevent_set_clock(struct clock_event_device *cd,
68					unsigned int clock)
69{
70	clockevents_calc_mult_shift(cd, clock, 4);
71}
72
73#endif /* _ASM_TIME_H */
74