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/**
* @file rtems/score/smp.h
*
* @brief Interface to the SuperCore SMP Support used Internally to RTEMS
*
* This include file defines the interface to the SuperCore
* SMP support that is used internally to RTEMS.
*/
/*
* 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.
*/
#ifndef _RTEMS_SCORE_SMP_H
#define _RTEMS_SCORE_SMP_H
#if defined (RTEMS_SMP)
#include <rtems/score/percpu.h>
/**
* @defgroup SuperCoreSMP SMP Support
*
* @ingroup Score
*
* This defines the interface of the SuperCore support
* code for SMP support.
*/
/**@{*/
#ifdef __cplusplus
extern "C" {
#endif
/**
* This defines the bit which indicates the interprocessor interrupt
* has been requested so that RTEMS will reschedule on this CPU
* because the currently executing thread needs to be switched out.
*/
#define RTEMS_BSP_SMP_CONTEXT_SWITCH_NECESSARY 0x01
/**
* This defines the bit which indicates the interprocessor interrupt
* has been requested so that RTEMS will reschedule on this CPU
* because the currently executing thread has been sent a signal.
*/
#define RTEMS_BSP_SMP_SIGNAL_TO_SELF 0x02
/**
* This defines the bit which indicates the interprocessor interrupt
* has been requested so that this CPU will be shutdown. This is done
* as part of rtems_executive_shutdown().
*/
#define RTEMS_BSP_SMP_SHUTDOWN 0x04
/**
* This defines the bit which indicates the interprocessor interrupt
* has been requested that the receiving CPU needs to perform a context
* switch to the first task.
*/
#define RTEMS_BSP_SMP_FIRST_TASK 0x08
#ifndef ASM
/**
* @brief Number of CPUs in a SMP system.
*
* This variable is set during the SMP initialization sequence to
* indicate the number of CPUs in this system.
*/
SCORE_EXTERN uint32_t _SMP_Processor_count;
/**
* @brief Request of others CPUs.
*
* This method is invoked by RTEMS when it needs to make a request
* of the other CPUs. It should be implemented using some type of
* interprocessor interrupt. CPUs not including the originating
* CPU should receive the message.
*
* @param [in] message is message to send
*/
void _SMP_Broadcast_message(
uint32_t message
);
/**
* @brief Request other cores to perform first context switch.
*
* Send message to other cores requesting them to perform
* their first context switch operation.
*/
void _SMP_Request_other_cores_to_perform_first_context_switch(void);
/**
* @brief Request dispatch on other cores.
*
* Send message to other cores requesting them to perform
* a thread dispatch operation.
*/
void _SMP_Request_other_cores_to_dispatch(void);
/**
* @brief Request other cores to shutdown.
*
* Send message to other cores requesting them to shutdown.
*/
void _SMP_Request_other_cores_to_shutdown(void);
#endif
#ifdef __cplusplus
}
#endif
#endif
/**@}*/
#endif
/* end of include file */
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