/* * Copyright (C) 2001, 2002, MontaVista Software Inc. * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net * Copyright (c) 2003 Maciej W. Rozycki * * include/asm-mips/time.h * header file for the new style time.c file and time services. * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. * * Please refer to Documentation/mips/time.README. */ #ifndef _ASM_TIME_H #define _ASM_TIME_H #include <linux/interrupt.h> #include <linux/linkage.h> #include <linux/ptrace.h> #include <linux/rtc.h> #include <linux/spinlock.h> extern spinlock_t rtc_lock; /* * RTC ops. By default, they point to no-RTC functions. * rtc_get_time - mktime(year, mon, day, hour, min, sec) in seconds. * rtc_set_time - reverse the above translation and set time to RTC. * rtc_set_mmss - similar to rtc_set_time, but only min and sec need * to be set. Used by RTC sync-up. */ extern unsigned long (*rtc_get_time)(void); extern int (*rtc_set_time)(unsigned long); extern int (*rtc_set_mmss)(unsigned long); /* * Timer interrupt functions. * mips_timer_state is needed for high precision timer calibration. * mips_timer_ack may be NULL if the interrupt is self-recoverable. */ extern int (*mips_timer_state)(void); extern void (*mips_timer_ack)(void); /* * High precision timer functions. * If mips_hpt_read is NULL, an R4k-compatible timer setup is attempted. */ extern unsigned int (*mips_hpt_read)(void); extern void (*mips_hpt_init)(unsigned int); /* * to_tm() converts system time back to (year, mon, day, hour, min, sec). * It is intended to help implement rtc_set_time() functions. * Copied from PPC implementation. */ extern void to_tm(unsigned long tim, struct rtc_time *tm); /* * do_gettimeoffset(). By default, this func pointer points to * do_null_gettimeoffset(), which leads to the same resolution as HZ. * Higher resolution versions are available, which give ~1us resolution. */ extern unsigned long (*do_gettimeoffset)(void); /* * high-level timer interrupt routines. */ extern irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs); /* * the corresponding low-level timer interrupt routine. */ extern asmlinkage void ll_timer_interrupt(int irq, struct pt_regs *regs); /* * profiling and process accouting is done separately in local_timer_interrupt */ extern void local_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs); extern asmlinkage void ll_local_timer_interrupt(int irq, struct pt_regs *regs); /* * board specific routines required by time_init(). * board_time_init is defaulted to NULL and can remain so. * board_timer_setup must be setup properly in machine setup routine. */ struct irqaction; extern void (*board_time_init)(void); extern void (*board_timer_setup)(struct irqaction *irq); /* * mips_hpt_frequency - must be set if you intend to use an R4k-compatible * counter as a timer interrupt source; otherwise it can be set up * automagically with an aid of mips_timer_state. */ extern unsigned int mips_hpt_frequency; #endif /* _ASM_TIME_H */