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| Rev | Author | Line No. | Line |
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| 10 | jermar | 1 | /* |
| 2 | * Copyright (C) 2005 Jakub Jermar |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 1264 | jermar | 29 | /** |
| 30 | * @file ipi.c |
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| 31 | * @brief Generic IPI interface. |
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| 32 | */ |
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| 33 | |||
| 458 | decky | 34 | #ifdef CONFIG_SMP |
| 10 | jermar | 35 | |
| 36 | #include <smp/ipi.h> |
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| 37 | #include <config.h> |
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| 38 | |||
| 107 | decky | 39 | |
| 40 | /** Broadcast IPI message |
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| 41 | * |
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| 42 | * Broadcast IPI message to all CPUs. |
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| 43 | * |
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| 44 | * @param ipi Message to broadcast. |
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| 45 | * |
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| 1264 | jermar | 46 | * @bugs The decision whether to actually send the IPI must be based |
| 47 | * on a different criterion. The current version has |
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| 48 | * problems when some of the detected CPUs are marked |
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| 49 | * disabled in machine configuration. |
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| 107 | decky | 50 | */ |
| 10 | jermar | 51 | void ipi_broadcast(int ipi) |
| 52 | { |
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| 53 | /* |
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| 54 | * Provisions must be made to avoid sending IPI: |
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| 55 | * - before all CPU's were configured to accept the IPI |
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| 458 | decky | 56 | * - if there is only one CPU but the kernel was compiled with CONFIG_SMP |
| 10 | jermar | 57 | */ |
| 58 | |||
| 59 | if ((config.cpu_active > 1) && (config.cpu_active == config.cpu_count)) |
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| 60 | ipi_broadcast_arch(ipi); |
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| 61 | } |
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| 62 | |||
| 458 | decky | 63 | #endif /* CONFIG_SMP */ |