| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 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 */ |