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