forked from Imagelibrary/rtems
51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0+-with-RTEMS-exception */
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/**
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* @file
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*
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* @ingroup raspberrypi
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*
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* @brief Benchmark timer support.
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*/
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/*
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* Copyright (c) 2013 by Alan Cudmore
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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*
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* http://www.rtems.org/license/LICENSE
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*
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*/
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#include <bsp.h>
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#include <rtems.h>
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#include <rtems/btimer.h>
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#include <bsp/raspberrypi.h>
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static bool benchmark_timer_find_average_overhead = false;
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static uint64_t benchmark_timer_base;
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void benchmark_timer_initialize( void )
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{
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benchmark_timer_base = BCM2835_REG( BCM2835_GPU_TIMER_CLO );
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}
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benchmark_timer_t benchmark_timer_read( void )
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{
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uint32_t delta = BCM2835_REG( BCM2835_GPU_TIMER_CLO ) - benchmark_timer_base;
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if ( benchmark_timer_find_average_overhead ) {
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return delta;
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} else {
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return BCM2835_REG( BCM2835_GPU_TIMER_CLO );
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}
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}
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void benchmark_timer_disable_subtracting_average_overhead(
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bool find_average_overhead )
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{
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benchmark_timer_find_average_overhead = find_average_overhead;
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}
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