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https://github.com/AsahiLinux/u-boot
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32 lines
562 B
C
32 lines
562 B
C
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/*
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* (C) Copyright 2013
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* David Feng <fenghua@phytium.com.cn>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <command.h>
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#include <asm/system.h>
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/*
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* Generic timer implementation of get_tbclk()
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*/
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unsigned long get_tbclk(void)
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{
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unsigned long cntfrq;
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asm volatile("mrs %0, cntfrq_el0" : "=r" (cntfrq));
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return cntfrq;
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}
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/*
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* Generic timer implementation of timer_read_counter()
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*/
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unsigned long timer_read_counter(void)
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{
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unsigned long cntpct;
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isb();
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asm volatile("mrs %0, cntpct_el0" : "=r" (cntpct));
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return cntpct;
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}
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