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/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup RTEMSBSPsARMLPC24XX
*
* @brief Benchmark timer support.
*/
/*
* Copyright (c) 2008, 2009 embedded brains GmbH. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <rtems.h>
#include <bsp.h>
#include <rtems/btimer.h>
#include <bsp/system-clocks.h>
bool benchmark_timer_find_average_overhead = false;
static uint32_t benchmark_timer_base;
void benchmark_timer_initialize(void)
{
benchmark_timer_base = lpc24xx_timer();
}
benchmark_timer_t benchmark_timer_read(void)
{
uint32_t delta = lpc24xx_timer() - benchmark_timer_base;
if (benchmark_timer_find_average_overhead) {
return delta;
} else {
/* Value determined by tmck for NCS board */
if (delta > 74) {
return delta - 74;
} else {
return 0;
}
}
}
void benchmark_timer_disable_subtracting_average_overhead(bool find_average_overhead )
{
benchmark_timer_find_average_overhead = find_average_overhead;
}
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