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/*
* 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.com/license/LICENSE.
*/
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/system.h>
#include <rtems/score/thread.h>
#include <rtems/score/percpu.h>
#include <rtems/score/wkspace.h>
#include <rtems/config.h>
#include <string.h>
#if defined(RTEMS_SMP)
#include <rtems/score/smp.h>
void _SMP_Handler_initialize(void)
{
int cpu;
size_t size;
uintptr_t ptr;
/*
* Initialize per CPU structures.
*/
size = (_SMP_Processor_count) * sizeof(Per_CPU_Control);
memset( _Per_CPU_Information, '\0', size );
/*
* Initialize per cpu pointer table
*/
size = Configuration.interrupt_stack_size;
_Per_CPU_Information_p[0] = &_Per_CPU_Information[0];
for (cpu=1 ; cpu < rtems_configuration_smp_maximum_processors; cpu++ ) {
Per_CPU_Control *p = &_Per_CPU_Information[cpu];
_Per_CPU_Information_p[cpu] = p;
p->interrupt_stack_low = _Workspace_Allocate_or_fatal_error( size );
ptr = (uintptr_t) _Addresses_Add_offset( p->interrupt_stack_low, size );
ptr &= ~(CPU_STACK_ALIGNMENT - 1);
p->interrupt_stack_high = (void *)ptr;
p->state = RTEMS_BSP_SMP_CPU_INITIAL_STATE;
RTEMS_COMPILER_MEMORY_BARRIER();
}
}
#else
/*
* On single core systems, we can efficiently directly access a single
* statically allocated per cpu structure. And the fields are initialized
* as individual elements just like it has always been done.
*/
Per_CPU_Control _Per_CPU_Information[1];
#endif
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