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Viewing changes to roms/u-boot/arch/arm/cpu/armv7/arch_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/armv7/arch_timer.c
 
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/*
 
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 * (C) Copyright 2012-2014
 
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 *     Texas Instruments Incorporated, <www.ti.com>
 
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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 <asm/io.h>
 
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#include <div64.h>
 
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DECLARE_GLOBAL_DATA_PTR;
 
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int timer_init(void)
 
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{
 
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        gd->arch.tbl = 0;
 
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        gd->arch.tbu = 0;
 
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        gd->arch.timer_rate_hz = CONFIG_SYS_HZ_CLOCK / CONFIG_SYS_HZ;
 
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        return 0;
 
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}
 
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unsigned long long get_ticks(void)
 
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{
 
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        ulong nowl, nowu;
 
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        asm volatile("mrrc p15, 0, %0, %1, c14" : "=r" (nowl), "=r" (nowu));
 
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        gd->arch.tbl = nowl;
 
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        gd->arch.tbu = nowu;
 
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        return (((unsigned long long)gd->arch.tbu) << 32) | gd->arch.tbl;
 
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}
 
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ulong get_timer(ulong base)
 
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{
 
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        return lldiv(get_ticks(), gd->arch.timer_rate_hz) - base;
 
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}
 
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void __udelay(unsigned long usec)
 
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{
 
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        unsigned long long endtime;
 
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        endtime = lldiv((unsigned long long)usec * gd->arch.timer_rate_hz,
 
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                        1000UL);
 
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        endtime += get_ticks();
 
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        while (get_ticks() < endtime)
 
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                ;
 
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}
 
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ulong get_tbclk(void)
 
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{
 
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        return gd->arch.timer_rate_hz;
 
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}