tms570/start/bspstarthooks.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup RTEMSBSPsARMTMS570
0007  *
0008  * @brief This source file contains the bsp_start_hook_1(0 implementation.
0009  */
0010
0011 /*
0012  * Copyright (C) 2014 Premysl Houdek <kom541000@gmail.com>
0013  *
0014  * Google Summer of Code 2014 at
0015  * Czech Technical University in Prague
0016  * Zikova 1903/4
0017  * 166 36 Praha 6
0018  * Czech Republic
0019  *
0020  * Redistribution and use in source and binary forms, with or without
0021  * modification, are permitted provided that the following conditions
0022  * are met:
0023  * 1. Redistributions of source code must retain the above copyright
0024  *    notice, this list of conditions and the following disclaimer.
0025  * 2. Redistributions in binary form must reproduce the above copyright
0026  *    notice, this list of conditions and the following disclaimer in the
0027  *    documentation and/or other materials provided with the distribution.
0028  *
0029  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0030  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0031  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0032  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0033  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0034  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0035  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0036  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0037  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0038  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0039  * POSSIBILITY OF SUCH DAMAGE.
0040  */
0041
0042 #include <bsp/start.h>
0043 #include <libcpu/arm-cp15.h>
0044
0045 BSP_START_TEXT_SECTION void bsp_start_hook_1( void )
0046 {
0047   uint32_t ctrl;
0048   size_t size;
0049
0050   ctrl = arm_cp15_get_control();
0051
0052   if ( ( ctrl & ARM_CP15_CTRL_I ) == 0 ) {
0053     rtems_cache_invalidate_entire_instruction();
0054     ctrl |= ARM_CP15_CTRL_I;
0055     arm_cp15_set_control(ctrl);
0056   }
0057
0058   if ( ( ctrl & ARM_CP15_CTRL_C ) == 0 ) {
0059     rtems_cache_invalidate_entire_data();
0060     ctrl |= ARM_CP15_CTRL_C;
0061     arm_cp15_set_control(ctrl);
0062   }
0063
0064   bsp_start_copy_sections_compact();
0065   bsp_start_clear_bss();
0066
0067   size =(size_t) bsp_section_fast_text_size;
0068   RTEMS_OBFUSCATE_VARIABLE( size );
0069
0070   if ( size != 0 ) {
0071     rtems_cache_flush_multiple_data_lines( bsp_section_fast_text_begin, size );
0072   }
0073 }