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10 jermar 1
/*
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 * Copyright (c) 2005 Jakub Jermar
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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/** @addtogroup generic
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 * @{
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 */
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/**
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 * @file
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 * @brief   Generic IPI interface.
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 */
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#ifdef CONFIG_SMP
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#include <smp/ipi.h>
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#include <config.h>
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/** Broadcast IPI message
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 *
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 * Broadcast IPI message to all CPUs.
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 *
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 * @param ipi Message to broadcast.
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 *
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 * @bug The decision whether to actually send the IPI must be based
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 *  on a different criterion. The current version has
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 *  problems when some of the detected CPUs are marked
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 *  disabled in machine configuration.
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 */
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void ipi_broadcast(int ipi)
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{
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    /*
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     * Provisions must be made to avoid sending IPI:
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     * - before all CPU's were configured to accept the IPI
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     * - if there is only one CPU but the kernel was compiled with CONFIG_SMP
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     */
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    if ((config.cpu_active > 1) && (config.cpu_active == config.cpu_count))
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        ipi_broadcast_arch(ipi);
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}
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#endif /* CONFIG_SMP */
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/** @}
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 */