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1 | /* |
2 | * Copyright (C) 2001, 2002, MontaVista Software Inc. | |
3 | * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net | |
4 | * Copyright (c) 2003 Maciej W. Rozycki | |
5 | * | |
6 | * include/asm-mips/time.h | |
7 | * header file for the new style time.c file and time services. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify it | |
10 | * under the terms of the GNU General Public License as published by the | |
11 | * Free Software Foundation; either version 2 of the License, or (at your | |
12 | * option) any later version. | |
13 | * | |
14 | * Please refer to Documentation/mips/time.README. | |
15 | */ | |
16 | #ifndef _ASM_TIME_H | |
17 | #define _ASM_TIME_H | |
18 | ||
19 | #include <linux/interrupt.h> | |
20 | #include <linux/linkage.h> | |
21 | #include <linux/ptrace.h> | |
22 | #include <linux/rtc.h> | |
53c2df2f AN |
23 | #include <linux/spinlock.h> |
24 | ||
25 | extern spinlock_t rtc_lock; | |
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26 | |
27 | /* | |
28 | * RTC ops. By default, they point to no-RTC functions. | |
d23ee8fe YY |
29 | * rtc_mips_get_time - mktime(year, mon, day, hour, min, sec) in seconds. |
30 | * rtc_mips_set_time - reverse the above translation and set time to RTC. | |
31 | * rtc_mips_set_mmss - similar to rtc_set_time, but only min and sec need | |
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32 | * to be set. Used by RTC sync-up. |
33 | */ | |
d23ee8fe YY |
34 | extern unsigned long (*rtc_mips_get_time)(void); |
35 | extern int (*rtc_mips_set_time)(unsigned long); | |
36 | extern int (*rtc_mips_set_mmss)(unsigned long); | |
1da177e4 LT |
37 | |
38 | /* | |
39 | * Timer interrupt functions. | |
40 | * mips_timer_state is needed for high precision timer calibration. | |
41 | * mips_timer_ack may be NULL if the interrupt is self-recoverable. | |
42 | */ | |
43 | extern int (*mips_timer_state)(void); | |
44 | extern void (*mips_timer_ack)(void); | |
45 | ||
46 | /* | |
47 | * High precision timer functions. | |
48 | * If mips_hpt_read is NULL, an R4k-compatible timer setup is attempted. | |
49 | */ | |
50 | extern unsigned int (*mips_hpt_read)(void); | |
51 | extern void (*mips_hpt_init)(unsigned int); | |
52 | ||
53 | /* | |
54 | * to_tm() converts system time back to (year, mon, day, hour, min, sec). | |
55 | * It is intended to help implement rtc_set_time() functions. | |
56 | * Copied from PPC implementation. | |
57 | */ | |
58 | extern void to_tm(unsigned long tim, struct rtc_time *tm); | |
59 | ||
60 | /* | |
61 | * do_gettimeoffset(). By default, this func pointer points to | |
62 | * do_null_gettimeoffset(), which leads to the same resolution as HZ. | |
63 | * Higher resolution versions are available, which give ~1us resolution. | |
64 | */ | |
65 | extern unsigned long (*do_gettimeoffset)(void); | |
66 | ||
67 | /* | |
68 | * high-level timer interrupt routines. | |
69 | */ | |
70 | extern irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs); | |
71 | ||
72 | /* | |
73 | * the corresponding low-level timer interrupt routine. | |
74 | */ | |
75 | extern asmlinkage void ll_timer_interrupt(int irq, struct pt_regs *regs); | |
76 | ||
77 | /* | |
78 | * profiling and process accouting is done separately in local_timer_interrupt | |
79 | */ | |
80 | extern void local_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs); | |
81 | extern asmlinkage void ll_local_timer_interrupt(int irq, struct pt_regs *regs); | |
82 | ||
83 | /* | |
84 | * board specific routines required by time_init(). | |
85 | * board_time_init is defaulted to NULL and can remain so. | |
86 | * board_timer_setup must be setup properly in machine setup routine. | |
87 | */ | |
88 | struct irqaction; | |
89 | extern void (*board_time_init)(void); | |
90 | extern void (*board_timer_setup)(struct irqaction *irq); | |
91 | ||
92 | /* | |
93 | * mips_hpt_frequency - must be set if you intend to use an R4k-compatible | |
94 | * counter as a timer interrupt source; otherwise it can be set up | |
95 | * automagically with an aid of mips_timer_state. | |
96 | */ | |
97 | extern unsigned int mips_hpt_frequency; | |
98 | ||
99 | #endif /* _ASM_TIME_H */ |