diff options
Diffstat (limited to 'arch/frv/kernel/time.c')
-rw-r--r-- | arch/frv/kernel/time.c | 122 |
1 files changed, 0 insertions, 122 deletions
diff --git a/arch/frv/kernel/time.c b/arch/frv/kernel/time.c deleted file mode 100644 index 332e00bf9d06..000000000000 --- a/arch/frv/kernel/time.c +++ /dev/null @@ -1,122 +0,0 @@ -/* time.c: FRV arch-specific time handling - * - * Copyright (C) 2003-5 Red Hat, Inc. All Rights Reserved. - * Written by David Howells (dhowells@redhat.com) - * - Derived from arch/m68k/kernel/time.c - * - * 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. - */ - -#include <linux/module.h> -#include <linux/errno.h> -#include <linux/sched.h> -#include <linux/kernel.h> -#include <linux/param.h> -#include <linux/string.h> -#include <linux/interrupt.h> -#include <linux/profile.h> -#include <linux/irq.h> -#include <linux/mm.h> - -#include <asm/io.h> -#include <asm/timer-regs.h> -#include <asm/mb-regs.h> -#include <asm/mb86943a.h> - -#include <linux/timex.h> - -#define TICK_SIZE (tick_nsec / 1000) - -unsigned long __nongprelbss __clkin_clock_speed_HZ; -unsigned long __nongprelbss __ext_bus_clock_speed_HZ; -unsigned long __nongprelbss __res_bus_clock_speed_HZ; -unsigned long __nongprelbss __sdram_clock_speed_HZ; -unsigned long __nongprelbss __core_bus_clock_speed_HZ; -unsigned long __nongprelbss __core_clock_speed_HZ; -unsigned long __nongprelbss __dsu_clock_speed_HZ; -unsigned long __nongprelbss __serial_clock_speed_HZ; -unsigned long __delay_loops_MHz; - -static irqreturn_t timer_interrupt(int irq, void *dummy); - -static struct irqaction timer_irq = { - .handler = timer_interrupt, - .name = "timer", -}; - -/* - * timer_interrupt() needs to keep up the real-time clock, - * as well as call the "xtime_update()" routine every clocktick - */ -static irqreturn_t timer_interrupt(int irq, void *dummy) -{ - profile_tick(CPU_PROFILING); - - xtime_update(1); - -#ifdef CONFIG_HEARTBEAT - static unsigned short n; - n++; - __set_LEDS(n); -#endif /* CONFIG_HEARTBEAT */ - - update_process_times(user_mode(get_irq_regs())); - - return IRQ_HANDLED; -} - -void time_divisor_init(void) -{ - unsigned short base, pre, prediv; - - /* set the scheduling timer going */ - pre = 1; - prediv = 4; - base = __res_bus_clock_speed_HZ / pre / HZ / (1 << prediv); - - __set_TPRV(pre); - __set_TxCKSL_DATA(0, prediv); - __set_TCTR(TCTR_SC_CTR0 | TCTR_RL_RW_LH8 | TCTR_MODE_2); - __set_TCSR_DATA(0, base & 0xff); - __set_TCSR_DATA(0, base >> 8); -} - - -void read_persistent_clock(struct timespec *ts) -{ - unsigned int year, mon, day, hour, min, sec; - - extern void arch_gettod(int *year, int *mon, int *day, int *hour, int *min, int *sec); - - /* FIX by dqg : Set to zero for platforms that don't have tod */ - /* without this time is undefined and can overflow time_t, causing */ - /* very strange errors */ - year = 1980; - mon = day = 1; - hour = min = sec = 0; - arch_gettod (&year, &mon, &day, &hour, &min, &sec); - - if ((year += 1900) < 1970) - year += 100; - ts->tv_sec = mktime(year, mon, day, hour, min, sec); - ts->tv_nsec = 0; -} - -void time_init(void) -{ - /* install scheduling interrupt handler */ - setup_irq(IRQ_CPU_TIMER0, &timer_irq); - - time_divisor_init(); -} - -/* - * Scheduler clock - returns current time in nanosec units. - */ -unsigned long long sched_clock(void) -{ - return jiffies_64 * (1000000000 / HZ); -} |