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[/] [ao68000/] [trunk/] [tests/] [soc_for_linux_on_terasic_de2_70/] [software/] [linux-2.6.33.1-ao68000/] [arch/] [m68knommu/] [kernel/] [time.c] - Rev 12
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/* * linux/arch/m68knommu/kernel/time.c * * Copyright (C) 1991, 1992, 1995 Linus Torvalds * * This file contains the m68k-specific time handling details. * Most of the stuff is located in the machine specific files. * * 1997-09-10 Updated NTP code according to technical memorandum Jan '96 * "A Kernel Model for Precision Timekeeping" by Dave Mills */ #include <linux/errno.h> #include <linux/module.h> #include <linux/sched.h> #include <linux/kernel.h> #include <linux/param.h> #include <linux/string.h> #include <linux/mm.h> #include <linux/profile.h> #include <linux/time.h> #include <linux/timex.h> #include <asm/machdep.h> #include <asm/irq_regs.h> #define TICK_SIZE (tick_nsec / 1000) static inline int set_rtc_mmss(unsigned long nowtime) { if (mach_set_clock_mmss) return mach_set_clock_mmss (nowtime); return -1; } #ifndef CONFIG_GENERIC_CLOCKEVENTS /* * timer_interrupt() needs to keep up the real-time clock, * as well as call the "do_timer()" routine every clocktick */ irqreturn_t arch_timer_interrupt(int irq, void *dummy) { unsigned long flags; if (current->pid) profile_tick(CPU_PROFILING); write_seqlock_irqsave(&xtime_lock, flags); do_timer(1); #ifndef CONFIG_SMP update_process_times(user_mode(get_irq_regs())); #endif write_sequnlock_irqrestore(&xtime_lock, flags); return(IRQ_HANDLED); } #endif static unsigned long read_rtc_mmss(void) { unsigned int year, mon, day, hour, min, sec; if (mach_gettod) mach_gettod(&year, &mon, &day, &hour, &min, &sec); else year = mon = day = hour = min = sec = 0; if ((year += 1900) < 1970) year += 100; return mktime(year, mon, day, hour, min, sec); } void read_persistent_clock(struct timespec *ts) { ts->tv_sec = read_rtc_mmss(); ts->tv_nsec = 0; } int update_persistent_clock(struct timespec now) { return set_rtc_mmss(now.tv_sec); } void time_init(void) { hw_timer_init(); }