From e3e3b871ee7f625bb65de0836490db73badce55e Mon Sep 17 00:00:00 2001 From: Sebastian Huber Date: Fri, 17 Jul 2020 14:40:36 +0200 Subject: libtest: Add T_busy() Update #3199. --- cpukit/libtest/t-test-busy.c | 58 ++++++++++++++++++++++++++++++++++++++++++++ cpukit/libtest/testbusy.c | 20 +++------------ 2 files changed, 61 insertions(+), 17 deletions(-) create mode 100644 cpukit/libtest/t-test-busy.c (limited to 'cpukit/libtest') diff --git a/cpukit/libtest/t-test-busy.c b/cpukit/libtest/t-test-busy.c new file mode 100644 index 0000000000..3bf149b8bb --- /dev/null +++ b/cpukit/libtest/t-test-busy.c @@ -0,0 +1,58 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ + +/** + * @file + * + * @ingroup RTEMSTestFrameworkImpl + * + * @brief Implementation of T_busy(). + */ + +/* + * Copyright (C) 2014, 2020 embedded brains GmbH (http://www.embedded-brains.de) + * + * 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. + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include + +/* + * It is important that we actually use the same T_busy() function at the + * various places. So, the compiler must not inline this function. Take care + * of link time optimization. + */ +__attribute__((__noinline__)) void +T_busy(uint_fast32_t count) +{ + uint_fast32_t i; + + i = 0; + + do { + __asm__ volatile (""); + ++i; + } while (i < count); +} diff --git a/cpukit/libtest/testbusy.c b/cpukit/libtest/testbusy.c index e5218b0112..bf11b11632 100644 --- a/cpukit/libtest/testbusy.c +++ b/cpukit/libtest/testbusy.c @@ -19,6 +19,7 @@ #include #include +#include #include static uint_fast32_t estimate_busy_loop_maximum( void ) @@ -45,21 +46,6 @@ static uint_fast32_t wait_for_tick_change( void ) return now; } -/* - * It is important that we use actually use the same rtems_test_busy() function - * at the various places, since otherwise the obtained maximum value might be - * wrong. So, the compiler must not inline this function. - */ -RTEMS_NO_INLINE void rtems_test_busy( uint_fast32_t count ) -{ - uint_fast32_t i = 0; - - do { - __asm__ volatile (""); - ++i; - } while ( i < count ); -} - uint_fast32_t rtems_test_get_one_tick_busy_count( void ) { uint_fast32_t last; @@ -78,7 +64,7 @@ uint_fast32_t rtems_test_get_one_tick_busy_count( void ) while ( true ) { last = wait_for_tick_change(); - rtems_test_busy( b ); + T_busy( b ); now = rtems_clock_get_ticks_since_boot(); if ( now != last ) { @@ -94,7 +80,7 @@ uint_fast32_t rtems_test_get_one_tick_busy_count( void ) m = ( a + b ) / 2; last = wait_for_tick_change(); - rtems_test_busy( m ); + T_busy( m ); now = rtems_clock_get_ticks_since_boot(); if ( now != last ) { -- cgit v1.2.3