mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-23 12:43:55 +08:00
53c2df2f4e
Many RTC routines were not protected against each other, so there are
potential races, for example, ntp-update against /dev/rtc. This patch
fixes them using rtc_lock.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
100 lines
3.2 KiB
C
100 lines
3.2 KiB
C
/*
|
|
* 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 */
|