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-rw-r--r--arch/mn10300/kernel/time.c125
1 files changed, 0 insertions, 125 deletions
diff --git a/arch/mn10300/kernel/time.c b/arch/mn10300/kernel/time.c
deleted file mode 100644
index 06b83b17c5f1..000000000000
--- a/arch/mn10300/kernel/time.c
+++ /dev/null
@@ -1,125 +0,0 @@
-/* MN10300 Low level time management
- *
- * Copyright (C) 2007-2008 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- * - Derived from arch/i386/kernel/time.c
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
- */
-#include <linux/sched.h>
-#include <linux/sched/clock.h>
-#include <linux/kernel.h>
-#include <linux/interrupt.h>
-#include <linux/time.h>
-#include <linux/init.h>
-#include <linux/smp.h>
-#include <linux/profile.h>
-#include <linux/cnt32_to_63.h>
-#include <linux/clocksource.h>
-#include <linux/clockchips.h>
-#include <asm/irq.h>
-#include <asm/div64.h>
-#include <asm/processor.h>
-#include <asm/intctl-regs.h>
-#include <asm/rtc.h>
-#include "internal.h"
-
-static unsigned long mn10300_last_tsc; /* time-stamp counter at last time
- * interrupt occurred */
-
-static unsigned long sched_clock_multiplier;
-
-/*
- * scheduler clock - returns current time in nanosec units.
- */
-unsigned long long sched_clock(void)
-{
- union {
- unsigned long long ll;
- unsigned l[2];
- } tsc64, result;
- unsigned long tmp;
- unsigned product[3]; /* 96-bit intermediate value */
-
- /* cnt32_to_63() is not safe with preemption */
- preempt_disable();
-
- /* expand the tsc to 64-bits.
- * - sched_clock() must be called once a minute or better or the
- * following will go horribly wrong - see cnt32_to_63()
- */
- tsc64.ll = cnt32_to_63(get_cycles()) & 0x7fffffffffffffffULL;
-
- preempt_enable();
-
- /* scale the 64-bit TSC value to a nanosecond value via a 96-bit
- * intermediate
- */
- asm("mulu %2,%0,%3,%0 \n" /* LSW * mult -> 0:%3:%0 */
- "mulu %2,%1,%2,%1 \n" /* MSW * mult -> %2:%1:0 */
- "add %3,%1 \n"
- "addc 0,%2 \n" /* result in %2:%1:%0 */
- : "=r"(product[0]), "=r"(product[1]), "=r"(product[2]), "=r"(tmp)
- : "0"(tsc64.l[0]), "1"(tsc64.l[1]), "2"(sched_clock_multiplier)
- : "cc");
-
- result.l[0] = product[1] << 16 | product[0] >> 16;
- result.l[1] = product[2] << 16 | product[1] >> 16;
-
- return result.ll;
-}
-
-/*
- * initialise the scheduler clock
- */
-static void __init mn10300_sched_clock_init(void)
-{
- sched_clock_multiplier =
- __muldiv64u(NSEC_PER_SEC, 1 << 16, MN10300_TSCCLK);
-}
-
-/**
- * local_timer_interrupt - Local timer interrupt handler
- *
- * Handle local timer interrupts for this CPU. They may have been propagated
- * to this CPU from the CPU that actually gets them by way of an IPI.
- */
-irqreturn_t local_timer_interrupt(void)
-{
- profile_tick(CPU_PROFILING);
- update_process_times(user_mode(get_irq_regs()));
- return IRQ_HANDLED;
-}
-
-/*
- * initialise the various timers used by the main part of the kernel
- */
-void __init time_init(void)
-{
- /* we need the prescalar running to be able to use IOCLK/8
- * - IOCLK runs at 1/4 (ST5 open) or 1/8 (ST5 closed) internal CPU clock
- * - IOCLK runs at Fosc rate (crystal speed)
- */
- TMPSCNT |= TMPSCNT_ENABLE;
-
- init_clocksource();
-
- printk(KERN_INFO
- "timestamp counter I/O clock running at %lu.%02lu"
- " (calibrated against RTC)\n",
- MN10300_TSCCLK / 1000000, (MN10300_TSCCLK / 10000) % 100);
-
- mn10300_last_tsc = read_timestamp_counter();
-
- init_clockevents();
-
-#ifdef CONFIG_MN10300_WD_TIMER
- /* start the watchdog timer */
- watchdog_go();
-#endif
-
- mn10300_sched_clock_init();
-}