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// SPDX-License-Identifier: GPL-2.0-only
/*
* Based on arch/arm/kernel/time.c
*
* Copyright (C) 1991, 1992, 1995 Linus Torvalds
* Modifications for ARM (C) 1994-2001 Russell King
* Copyright (C) 2012 ARM Ltd.
*/
#include <linux/clockchips.h>
#include <linux/export.h>
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/time.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/smp.h>
#include <linux/timex.h>
#include <linux/errno.h>
#include <linux/profile.h>
#include <linux/stacktrace.h>
#include <linux/syscore_ops.h>
#include <linux/timer.h>
#include <linux/irq.h>
#include <linux/delay.h>
#include <linux/clocksource.h>
#include <linux/of_clk.h>
#include <linux/acpi.h>
#include <clocksource/arm_arch_timer.h>
#include <asm/thread_info.h>
#include <asm/paravirt.h>
static bool profile_pc_cb(void *arg, unsigned long pc)
{
unsigned long *prof_pc = arg;
if (in_lock_functions(pc))
return true;
*prof_pc = pc;
return false;
}
unsigned long profile_pc(struct pt_regs *regs)
{
unsigned long prof_pc = 0;
arch_stack_walk(profile_pc_cb, &prof_pc, current, regs);
return prof_pc;
}
EXPORT_SYMBOL(profile_pc);
void __init time_init(void)
{
u32 arch_timer_rate;
of_clk_init(NULL);
timer_probe();
tick_setup_hrtimer_broadcast();
arch_timer_rate = arch_timer_get_rate();
if (!arch_timer_rate)
panic("Unable to initialise architected timer.\n");
/* Calibrate the delay loop directly */
lpj_fine = arch_timer_rate / HZ;
pv_time_init();
}
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