shared/start/gettargethash-default.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup RTEMSImplClassic
0007  *
0008  * @brief This source file contains the default implementation of
0009  *   rtems_get_target_hash().
0010  */
0011
0012 /*
0013  * Copyright (C) 2021 embedded brains GmbH & Co. KG
0014  *
0015  * Redistribution and use in source and binary forms, with or without
0016  * modification, are permitted provided that the following conditions
0017  * are met:
0018  * 1. Redistributions of source code must retain the above copyright
0019  *    notice, this list of conditions and the following disclaimer.
0020  * 2. Redistributions in binary form must reproduce the above copyright
0021  *    notice, this list of conditions and the following disclaimer in the
0022  *    documentation and/or other materials provided with the distribution.
0023  *
0024  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0025  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0026  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0027  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0028  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0029  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0030  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0031  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0032  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0033  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0034  * POSSIBILITY OF SUCH DAMAGE.
0035  */
0036
0037 #include <rtems/config.h>
0038 #include <rtems/counter.h>
0039 #include <rtems/sysinit.h>
0040 #include <rtems/score/hash.h>
0041
0042 static Hash_Control bsp_target_hash;
0043
0044 static void bsp_target_hash_initialize( void )
0045 {
0046   Hash_Context context;
0047   uint32_t     frequency;
0048
0049   _Hash_Initialize( &context );
0050
0051   frequency = rtems_counter_frequency();
0052   _Hash_Add_data( &context, &frequency, sizeof( frequency ) );
0053
0054   _Hash_Finalize( &context, &bsp_target_hash );
0055 }
0056
0057 const char *rtems_get_target_hash( void )
0058 {
0059   return _Hash_Get_string( &bsp_target_hash );
0060 }
0061
0062 RTEMS_SYSINIT_ITEM(
0063   bsp_target_hash_initialize,
0064   RTEMS_SYSINIT_TARGET_HASH,
0065   RTEMS_SYSINIT_ORDER_SECOND
0066 );