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1da177e4 LT |
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> | |
23 | ||
24 | /* | |
25 | * RTC ops. By default, they point to no-RTC functions. | |
26 | * rtc_get_time - mktime(year, mon, day, hour, min, sec) in seconds. | |
27 | * rtc_set_time - reverse the above translation and set time to RTC. | |
28 | * rtc_set_mmss - similar to rtc_set_time, but only min and sec need | |
29 | * to be set. Used by RTC sync-up. | |
30 | */ | |
31 | extern unsigned long (*rtc_get_time)(void); | |
32 | extern int (*rtc_set_time)(unsigned long); | |
33 | extern int (*rtc_set_mmss)(unsigned long); | |
34 | ||
35 | /* | |
36 | * Timer interrupt functions. | |
37 | * mips_timer_state is needed for high precision timer calibration. | |
38 | * mips_timer_ack may be NULL if the interrupt is self-recoverable. | |
39 | */ | |
40 | extern int (*mips_timer_state)(void); | |
41 | extern void (*mips_timer_ack)(void); | |
42 | ||
43 | /* | |
44 | * High precision timer functions. | |
45 | * If mips_hpt_read is NULL, an R4k-compatible timer setup is attempted. | |
46 | */ | |
47 | extern unsigned int (*mips_hpt_read)(void); | |
48 | extern void (*mips_hpt_init)(unsigned int); | |
49 | ||
50 | /* | |
51 | * to_tm() converts system time back to (year, mon, day, hour, min, sec). | |
52 | * It is intended to help implement rtc_set_time() functions. | |
53 | * Copied from PPC implementation. | |
54 | */ | |
55 | extern void to_tm(unsigned long tim, struct rtc_time *tm); | |
56 | ||
57 | /* | |
58 | * do_gettimeoffset(). By default, this func pointer points to | |
59 | * do_null_gettimeoffset(), which leads to the same resolution as HZ. | |
60 | * Higher resolution versions are available, which give ~1us resolution. | |
61 | */ | |
62 | extern unsigned long (*do_gettimeoffset)(void); | |
63 | ||
64 | /* | |
65 | * high-level timer interrupt routines. | |
66 | */ | |
67 | extern irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs); | |
68 | ||
69 | /* | |
70 | * the corresponding low-level timer interrupt routine. | |
71 | */ | |
72 | extern asmlinkage void ll_timer_interrupt(int irq, struct pt_regs *regs); | |
73 | ||
74 | /* | |
75 | * profiling and process accouting is done separately in local_timer_interrupt | |
76 | */ | |
77 | extern void local_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs); | |
78 | extern asmlinkage void ll_local_timer_interrupt(int irq, struct pt_regs *regs); | |
79 | ||
80 | /* | |
81 | * board specific routines required by time_init(). | |
82 | * board_time_init is defaulted to NULL and can remain so. | |
83 | * board_timer_setup must be setup properly in machine setup routine. | |
84 | */ | |
85 | struct irqaction; | |
86 | extern void (*board_time_init)(void); | |
87 | extern void (*board_timer_setup)(struct irqaction *irq); | |
88 | ||
89 | /* | |
90 | * mips_hpt_frequency - must be set if you intend to use an R4k-compatible | |
91 | * counter as a timer interrupt source; otherwise it can be set up | |
92 | * automagically with an aid of mips_timer_state. | |
93 | */ | |
94 | extern unsigned int mips_hpt_frequency; | |
95 | ||
96 | #endif /* _ASM_TIME_H */ |