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70 lines
2.2 KiB
C
70 lines
2.2 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/*
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* Copyright (C) 2020 Jan Sommer, Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <rtems/score/smpimpl.h>
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#include <bsp/apic.h>
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#include <bsp/smp-imps.h>
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#include <bsp.h>
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#include <rtems.h>
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void _CPU_SMP_Prepare_start_multitasking( void )
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{
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/* Do nothing */
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}
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bool _CPU_SMP_Start_processor( uint32_t cpu_index )
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{
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(void) cpu_index;
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return true;
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}
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uint32_t _CPU_SMP_Get_current_processor( void )
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{
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return imps_apic_cpu_map[APIC_ID(IMPS_LAPIC_READ(LAPIC_ID))];
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}
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uint32_t _CPU_SMP_Initialize( void )
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{
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/* XXX need to deal with finding too many cores */
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return (uint32_t) imps_probe();
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}
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void _CPU_SMP_Finalize_initialization( uint32_t cpu_count )
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{
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if ( cpu_count > 1 )
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ipi_install_irq();
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}
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void _CPU_SMP_Send_interrupt( uint32_t target_processor_index )
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{
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send_ipi( target_processor_index, 0x30 );
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}
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