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Viewing changes to roms/u-boot/arch/arm/cpu/armv8/generic_timer.c

  • Committer: Phil Dennis-Jordan
  • Date: 2017-07-21 08:03:43 UTC
  • mfrom: (1.1.1)
  • Revision ID: phil@philjordan.eu-20170721080343-2yr2vdj7713czahv
New upstream release 2.9.0.

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roms/u-boot/arch/arm/cpu/armv8/generic_timer.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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}