| 1 |
|
| 2 | |
| 3 | * Copyright (C) 2001, 2002, MontaVista Software Inc.
|
| 4 | * Author: Jun Sun, [email protected] or [email protected]
|
| 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 |
|
| 18 | extern spinlock_t rtc_lock;
|
| 19 |
|
| 20 | |
| 21 | * board specific routines required by time_init().
|
| 22 |
|
| 23 | extern 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 |
|
| 29 | extern 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 |
|
| 35 | extern int (*perf_irq)(void);
|
| 36 | extern int __weak get_c0_perfcount_int(void);
|
| 37 |
|
| 38 | |
| 39 | * Initialize the calling CPU's compare interrupt as clockevent device
|
| 40 |
|
| 41 | extern unsigned int get_c0_compare_int(void);
|
| 42 | extern int r4k_clockevent_init(void);
|
| 43 |
|
| 44 | static 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 |
|
| 56 | extern int init_r4k_clocksource(void);
|
| 57 |
|
| 58 | static inline __init 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 |
|
| 67 | static 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
|