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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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1288 | jermar | 46 | * @bug 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 */ |