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/* SPDX-License-Identifier: BSD-2-Clause */
/*
* Copyright (C) 2020 Jan Sommer, Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
*
* 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.
*/
#include <rtems/score/smpimpl.h>
#include <bsp/apic.h>
#include <bsp/smp-imps.h>
#include <bsp.h>
#include <rtems.h>
void _CPU_SMP_Prepare_start_multitasking( void )
{
/* Do nothing */
}
bool _CPU_SMP_Start_processor( uint32_t cpu_index )
{
(void) cpu_index;
return true;
}
uint32_t _CPU_SMP_Get_current_processor( void )
{
return imps_apic_cpu_map[APIC_ID(IMPS_LAPIC_READ(LAPIC_ID))];
}
uint32_t _CPU_SMP_Initialize( void )
{
/* XXX need to deal with finding too many cores */
return (uint32_t) imps_probe();
}
void _CPU_SMP_Finalize_initialization( uint32_t cpu_count )
{
if ( cpu_count > 1 )
ipi_install_irq();
}
void _CPU_SMP_Send_interrupt( uint32_t target_processor_index )
{
send_ipi( target_processor_index, 0x30 );
}
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