4.104.114.84.95
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1 | /* |
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2 | * RTEMS Cache Aligned Malloc |
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3 | * |
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4 | * |
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5 | * COPYRIGHT (c) 1989-1999. |
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6 | * On-Line Applications Research Corporation (OAR). |
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7 | * |
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8 | * The license and distribution terms for this file may be |
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9 | * found in the file LICENSE in this distribution or at |
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10 | * http://www.rtems.com/license/LICENSE. |
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11 | * |
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12 | * $Id$ |
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13 | */ |
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14 | |
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15 | #include <rtems.h> |
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16 | #include <cache_.h> |
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17 | #include <stdlib.h> |
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18 | |
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19 | /* |
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20 | * rtems_cache_aligned_malloc |
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21 | * |
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22 | * DESCRIPTION: |
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23 | * |
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24 | * This function is used to allocate storage that spans an |
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25 | * integral number of cache blocks. |
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26 | */ |
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27 | |
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28 | void *rtems_cache_aligned_malloc ( |
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29 | size_t nbytes |
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30 | ) |
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31 | { |
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32 | /* |
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33 | * Arrange to have the user storage start on the first cache |
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34 | * block beyond the header. |
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35 | */ |
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36 | #if defined(CPU_DATA_CACHE_ALIGNMENT) |
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37 | return (void *) ((((unsigned long) |
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38 | malloc( nbytes + CPU_DATA_CACHE_ALIGNMENT - 1 )) |
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39 | + CPU_DATA_CACHE_ALIGNMENT - 1 ) &(~(CPU_DATA_CACHE_ALIGNMENT - 1)) ); |
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40 | #else |
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41 | return malloc( nbytes ); |
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42 | #endif |
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43 | } |
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