forked from Imagelibrary/rtems
d556af3605
The inter-processor interrupt (IPI) may be used to process per-CPU jobs. See for example the blocked handler in T_interrupt_test(). Update #3199.
97 lines
2.4 KiB
C
97 lines
2.4 KiB
C
/**
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* @file
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* @ingroup sparc_leon3
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* @brief LEON3 SMP BSP Support
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*/
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/*
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* COPYRIGHT (c) 1989-2011.
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* On-Line Applications Research Corporation (OAR).
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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*/
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#include <bsp.h>
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#include <bsp/bootcard.h>
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#include <bsp/fatal.h>
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#include <leon.h>
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#include <rtems/bspIo.h>
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#include <rtems/score/smpimpl.h>
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#include <stdlib.h>
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#if !defined(__leon__) || defined(RTEMS_PARAVIRT)
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uint32_t _CPU_SMP_Get_current_processor( void )
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{
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return _LEON3_Get_current_processor();
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}
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#endif
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static rtems_isr bsp_inter_processor_interrupt(
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rtems_vector_number vector
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)
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{
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_SMP_Inter_processor_interrupt_handler(_Per_CPU_Get());
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}
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void bsp_start_on_secondary_processor(Per_CPU_Control *cpu_self)
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{
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uint32_t cpu_index_self;
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/*
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* If data cache snooping is not enabled we terminate using BSP_fatal_exit()
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* instead of bsp_fatal(). This is done since the latter function tries to
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* acquire a ticket lock, an operation which requires data cache snooping to
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* be enabled.
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*/
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if ( !leon3_data_cache_snooping_enabled() )
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BSP_fatal_exit( LEON3_FATAL_INVALID_CACHE_CONFIG_SECONDARY_PROCESSOR );
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/* Unmask IPI interrupts at Interrupt controller for this CPU */
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cpu_index_self = _Per_CPU_Get_index(cpu_self);
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LEON3_IrqCtrl_Regs->mask[cpu_index_self] |= 1U << LEON3_mp_irq;
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_SMP_Start_multitasking_on_secondary_processor(cpu_self);
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}
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uint32_t _CPU_SMP_Initialize( void )
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{
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if ( !leon3_data_cache_snooping_enabled() )
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bsp_fatal( LEON3_FATAL_INVALID_CACHE_CONFIG_MAIN_PROCESSOR );
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LEON_Unmask_interrupt(LEON3_mp_irq);
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set_vector(bsp_inter_processor_interrupt, LEON_TRAP_TYPE(LEON3_mp_irq), 1);
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return leon3_get_cpu_count(LEON3_IrqCtrl_Regs);
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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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#if defined(RTEMS_DEBUG)
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printk( "Waking CPU %d\n", cpu_index );
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#endif
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LEON3_IrqCtrl_Regs->mpstat = 1U << cpu_index;
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return true;
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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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(void) cpu_count;
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/* Nothing to do */
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}
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void _CPU_SMP_Prepare_start_multitasking( void )
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{
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rtems_cache_invalidate_entire_instruction();
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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 interrupt to destination CPU */
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LEON3_IrqCtrl_Regs->force[target_processor_index] = 1 << LEON3_mp_irq;
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}
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