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