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402 | jermar | 1 | /* |
2071 | jermar | 2 | * Copyright (c) 2005 Jakub Jermar |
402 | jermar | 3 | * All rights reserved. |
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 | |||
3973 | decky | 29 | /** @addtogroup generic |
1702 | cejka | 30 | * @ingroup others |
31 | * @{ |
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32 | */ |
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1860 | jermar | 33 | /** |
34 | * @file |
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3973 | decky | 35 | * @brief Macros for making values and addresses aligned. |
1702 | cejka | 36 | */ |
37 | |||
1860 | jermar | 38 | #ifndef KERN_ALIGN_H_ |
39 | #define KERN_ALIGN_H_ |
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402 | jermar | 40 | |
565 | jermar | 41 | /** Align to the nearest lower address. |
564 | jermar | 42 | * |
43 | * @param s Address or size to be aligned. |
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565 | jermar | 44 | * @param a Size of alignment, must be power of 2. |
564 | jermar | 45 | */ |
3973 | decky | 46 | #define ALIGN_DOWN(s, a) ((s) & ~((a) - 1)) |
402 | jermar | 47 | |
565 | jermar | 48 | |
49 | /** Align to the nearest higher address. |
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564 | jermar | 50 | * |
51 | * @param s Address or size to be aligned. |
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565 | jermar | 52 | * @param a Size of alignment, must be power of 2. |
564 | jermar | 53 | */ |
3973 | decky | 54 | #define ALIGN_UP(s, a) (((s) + ((a) - 1)) & ~((a) - 1)) |
564 | jermar | 55 | |
402 | jermar | 56 | #endif |
1702 | cejka | 57 | |
1819 | decky | 58 | /** @} |
1702 | cejka | 59 | */ |