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Diffstat (limited to 'include/asm-mips/time.h')
| -rw-r--r-- | include/asm-mips/time.h | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/include/asm-mips/time.h b/include/asm-mips/time.h new file mode 100644 index 000000000000..e22a20665871 --- /dev/null +++ b/include/asm-mips/time.h @@ -0,0 +1,96 @@ +/* + * 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> + +/* + * 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 */ |