| /* |
| * 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) |
| { |
| |
| if (current->pid) |
| profile_tick(CPU_PROFILING); |
| |
| write_seqlock(&xtime_lock); |
| |
| do_timer(1); |
| |
| write_sequnlock(&xtime_lock); |
| |
| #ifndef CONFIG_SMP |
| update_process_times(user_mode(get_irq_regs())); |
| #endif |
| 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);; |
| } |
| |
| unsigned long read_persistent_clock(void) |
| { |
| return read_rtc_mmss(); |
| } |
| |
| int update_persistent_clock(struct timespec now) |
| { |
| return set_rtc_mmss(now.tv_sec); |
| } |
| |
| void time_init(void) |
| { |
| hw_timer_init(); |
| } |