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11bc755722
This patch add basic support for the architecture timer found on recent ARMv7 based SoCs. Signed-off-by: Vitaly Andrianov <vitalya@ti.com> Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
59 lines
962 B
C
59 lines
962 B
C
/*
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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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}
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