linux/arch/x86/kernel/time.c

// SPDX-License-Identifier: GPL-2.0
/*
 *  Copyright (c) 1991,1992,1995  Linus Torvalds
 *  Copyright (c) 1994  Alan Modra
 *  Copyright (c) 1995  Markus Kuhn
 *  Copyright (c) 1996  Ingo Molnar
 *  Copyright (c) 1998  Andrea Arcangeli
 *  Copyright (c) 2002,2006  Vojtech Pavlik
 *  Copyright (c) 2003  Andi Kleen
 *
 */

#include <linux/clocksource.h>
#include <linux/clockchips.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/i8253.h>
#include <linux/time.h>
#include <linux/export.h>

#include <asm/vsyscall.h>
#include <asm/x86_init.h>
#include <asm/i8259.h>
#include <asm/timer.h>
#include <asm/hpet.h>
#include <asm/time.h>

unsigned long profile_pc(struct pt_regs *regs)
{ … }
EXPORT_SYMBOL(…);

/*
 * Default timer interrupt handler for PIT/HPET
 */
static irqreturn_t timer_interrupt(int irq, void *dev_id)
{ … }

static void __init setup_default_timer_irq(void)
{ … }

/* Default timer init function */
void __init hpet_time_init(void)
{ … }

static __init void x86_late_time_init(void)
{ … }

/*
 * Initialize TSC and delay the periodic timer init to
 * late x86_late_time_init() so ioremap works.
 */
void __init time_init(void)
{ … }

/*
 * Sanity check the vdso related archdata content.
 */
void clocksource_arch_init(struct clocksource *cs)
{ … }