fvp/start/bspstarthooks.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup RTEMSBSPsARMFVP
0007  *
0008  * @brief This source file contains the implementation of bsp_start_hook_0()
0009  *   and bsp_start_hook_1().
0010  */
0011
0012 /*
0013  * Copyright (C) 2020 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 #ifdef HAVE_CONFIG_H
0038 #include "config.h"
0039 #endif
0040
0041 #include <bsp.h>
0042 #include <bsp/start.h>
0043
0044 #include <rtems/score/aarch32-pmsa.h>
0045 #include <rtems/score/aarch32-system-registers.h>
0046
0047 #ifdef RTEMS_SMP
0048 #include <rtems.h>
0049 #include <rtems/score/smpimpl.h>
0050
0051 #include <bsp/irq-generic.h>
0052
0053 #include <dev/irq/arm-gic-irq.h>
0054 #endif
0055
0056 void bsp_start_hook_0( void )
0057 {
0058 #ifdef RTEMS_SMP
0059   uint32_t cpu_index_self;
0060
0061   cpu_index_self = _SMP_Get_current_processor();
0062
0063   if ( cpu_index_self != 0 ) {
0064     /*
0065      * The FVP jumps to the entry point of the ELF file on all processors.
0066      * Prevent the fatal errors SMP_FATAL_MULTITASKING_START_ON_INVALID_PROCESSOR
0067      * and SMP_FATAL_MULTITASKING_START_ON_UNASSIGNED_PROCESSOR this way.
0068      */
0069     if ( !_SMP_Should_start_processor( cpu_index_self ) ) {
0070       while ( true ) {
0071         _ARM_Wait_for_event();
0072       }
0073     }
0074
0075     _AArch32_PMSA_Initialize_default();
0076     arm_gic_irq_initialize_secondary_cpu();
0077
0078     /* Change the VBAR from the start to the normal vector table */
0079     _AArch32_Write_vbar( (uint32_t) bsp_vector_table_begin );
0080
0081     bsp_interrupt_vector_enable( ARM_GIC_IRQ_SGI_0 );
0082     _SMP_Start_multitasking_on_secondary_processor(
0083       _Per_CPU_Get_by_index( cpu_index_self )
0084     );
0085   }
0086 #endif
0087 }
0088
0089 void bsp_start_hook_1( void )
0090 {
0091   bsp_start_copy_sections();
0092   _AArch32_PMSA_Initialize_default();
0093   bsp_start_clear_bss();
0094 }