diff options
Diffstat (limited to 'arch/mn10300/kernel/cevt-mn10300.c')
-rw-r--r-- | arch/mn10300/kernel/cevt-mn10300.c | 137 |
1 files changed, 0 insertions, 137 deletions
diff --git a/arch/mn10300/kernel/cevt-mn10300.c b/arch/mn10300/kernel/cevt-mn10300.c deleted file mode 100644 index 2b21bbc9efa4..000000000000 --- a/arch/mn10300/kernel/cevt-mn10300.c +++ /dev/null @@ -1,137 +0,0 @@ -/* MN10300 clockevents - * - * Copyright (C) 2010 Red Hat, Inc. All Rights Reserved. - * Written by Mark Salter (msalter@redhat.com) - * - * 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/clockchips.h> -#include <linux/interrupt.h> -#include <linux/percpu.h> -#include <linux/smp.h> -#include <asm/timex.h> -#include "internal.h" - -#ifdef CONFIG_SMP -#if (CONFIG_NR_CPUS > 2) && !defined(CONFIG_GEENERIC_CLOCKEVENTS_BROADCAST) -#error "This doesn't scale well! Need per-core local timers." -#endif -#else /* CONFIG_SMP */ -#define stop_jiffies_counter1() -#define reload_jiffies_counter1(x) -#define TMJC1IRQ TMJCIRQ -#endif - - -static int next_event(unsigned long delta, - struct clock_event_device *evt) -{ - unsigned int cpu = smp_processor_id(); - - if (cpu == 0) { - stop_jiffies_counter(); - reload_jiffies_counter(delta - 1); - } else { - stop_jiffies_counter1(); - reload_jiffies_counter1(delta - 1); - } - return 0; -} - -static DEFINE_PER_CPU(struct clock_event_device, mn10300_clockevent_device); -static DEFINE_PER_CPU(struct irqaction, timer_irq); - -static irqreturn_t timer_interrupt(int irq, void *dev_id) -{ - struct clock_event_device *cd; - unsigned int cpu = smp_processor_id(); - - if (cpu == 0) - stop_jiffies_counter(); - else - stop_jiffies_counter1(); - - cd = &per_cpu(mn10300_clockevent_device, cpu); - cd->event_handler(cd); - - return IRQ_HANDLED; -} - -static void event_handler(struct clock_event_device *dev) -{ -} - -static inline void setup_jiffies_interrupt(int irq, - struct irqaction *action) -{ - u16 tmp; - setup_irq(irq, action); - set_intr_level(irq, NUM2GxICR_LEVEL(CONFIG_TIMER_IRQ_LEVEL)); - GxICR(irq) |= GxICR_ENABLE | GxICR_DETECT | GxICR_REQUEST; - tmp = GxICR(irq); -} - -int __init init_clockevents(void) -{ - struct clock_event_device *cd; - struct irqaction *iact; - unsigned int cpu = smp_processor_id(); - - cd = &per_cpu(mn10300_clockevent_device, cpu); - - if (cpu == 0) { - stop_jiffies_counter(); - cd->irq = TMJCIRQ; - } else { - stop_jiffies_counter1(); - cd->irq = TMJC1IRQ; - } - - cd->name = "Timestamp"; - cd->features = CLOCK_EVT_FEAT_ONESHOT; - - /* Calculate shift/mult. We want to spawn at least 1 second */ - clockevents_calc_mult_shift(cd, MN10300_JCCLK, 1); - - /* Calculate the min / max delta */ - cd->max_delta_ns = clockevent_delta2ns(TMJCBR_MAX, cd); - cd->max_delta_ticks = TMJCBR_MAX; - cd->min_delta_ns = clockevent_delta2ns(100, cd); - cd->min_delta_ticks = 100; - - cd->rating = 200; - cd->cpumask = cpumask_of(smp_processor_id()); - cd->event_handler = event_handler; - cd->set_next_event = next_event; - - iact = &per_cpu(timer_irq, cpu); - iact->flags = IRQF_SHARED | IRQF_TIMER; - iact->handler = timer_interrupt; - - clockevents_register_device(cd); - -#if defined(CONFIG_SMP) && !defined(CONFIG_GENERIC_CLOCKEVENTS_BROADCAST) - /* setup timer irq affinity so it only runs on this cpu */ - { - struct irq_data *data; - data = irq_get_irq_data(cd->irq); - cpumask_copy(irq_data_get_affinity_mask(data), cpumask_of(cpu)); - iact->flags |= IRQF_NOBALANCING; - } -#endif - - if (cpu == 0) { - reload_jiffies_counter(MN10300_JC_PER_HZ - 1); - iact->name = "CPU0 Timer"; - } else { - reload_jiffies_counter1(MN10300_JC_PER_HZ - 1); - iact->name = "CPU1 Timer"; - } - - setup_jiffies_interrupt(cd->irq, iact); - - return 0; -} |