cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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isa-timer.c (855B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 *  linux/arch/arm/mach-footbridge/isa-timer.c
      4 *
      5 *  Copyright (C) 1998 Russell King.
      6 *  Copyright (C) 1998 Phil Blundell
      7 */
      8#include <linux/clockchips.h>
      9#include <linux/i8253.h>
     10#include <linux/init.h>
     11#include <linux/interrupt.h>
     12#include <linux/irq.h>
     13#include <linux/spinlock.h>
     14#include <linux/timex.h>
     15
     16#include <asm/irq.h>
     17#include <asm/mach/time.h>
     18
     19#include "common.h"
     20
     21static irqreturn_t pit_timer_interrupt(int irq, void *dev_id)
     22{
     23	struct clock_event_device *ce = dev_id;
     24	ce->event_handler(ce);
     25	return IRQ_HANDLED;
     26}
     27
     28void __init isa_timer_init(void)
     29{
     30	clocksource_i8253_init();
     31
     32	if (request_irq(i8253_clockevent.irq, pit_timer_interrupt,
     33			IRQF_TIMER | IRQF_IRQPOLL, "pit", &i8253_clockevent))
     34		pr_err("Failed to request irq %d(pit)\n", i8253_clockevent.irq);
     35	clockevent_i8253_init(false);
     36}