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| 1 | jermar | 1 | /* |
| 2 | * Copyright (C) 2001-2004 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 memstr.c |
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| 31 | * @brief Memory string operations. |
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| 32 | * |
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| 33 | * This file provides architecture independent functions |
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| 34 | * to manipulate blocks of memory. These functions |
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| 35 | * are optimized as much as generic functions of |
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| 36 | * this type can be. However, architectures are |
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| 37 | * free to provide even more optimized versions of these |
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| 38 | * functions. |
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| 39 | */ |
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| 40 | |||
| 1 | jermar | 41 | #include <memstr.h> |
| 42 | #include <arch/types.h> |
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| 43 | |||
| 62 | decky | 44 | /** Copy block of memory |
| 45 | * |
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| 46 | * Copy cnt bytes from src address to dst address. |
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| 882 | jermar | 47 | * The copying is done word-by-word and then byte-by-byte. |
| 48 | * The source and destination memory areas cannot overlap. |
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| 62 | decky | 49 | * |
| 50 | * @param src Origin address to copy from. |
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| 51 | * @param dst Origin address to copy to. |
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| 52 | * @param cnt Number of bytes to copy. |
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| 53 | * |
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| 54 | */ |
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| 360 | jermar | 55 | void *_memcpy(void * dst, const void *src, size_t cnt) |
| 1 | jermar | 56 | { |
| 882 | jermar | 57 | int i, j; |
| 1 | jermar | 58 | |
| 882 | jermar | 59 | for (i = 0; i < cnt/sizeof(__native); i++) |
| 60 | ((__native *) dst)[i] = ((__native *) src)[i]; |
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| 195 | vana | 61 | |
| 882 | jermar | 62 | for (j = 0; j < cnt%sizeof(__native); j++) |
| 63 | ((__u8 *)(((__native *) dst) + i))[j] = ((__u8 *)(((__native *) src) + i))[j]; |
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| 64 | |||
| 195 | vana | 65 | return (char *)src; |
| 1 | jermar | 66 | } |
| 67 | |||
| 62 | decky | 68 | /** Fill block of memory |
| 69 | * |
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| 70 | * Fill cnt bytes at dst address with the value x. |
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| 71 | * The filling is done byte-by-byte. |
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| 72 | * |
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| 73 | * @param dst Origin address to fill. |
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| 74 | * @param cnt Number of bytes to fill. |
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| 75 | * @param x Value to fill. |
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| 76 | * |
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| 77 | */ |
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| 72 | decky | 78 | void _memsetb(__address dst, size_t cnt, __u8 x) |
| 1 | jermar | 79 | { |
| 80 | int i; |
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| 81 | __u8 *p = (__u8 *) dst; |
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| 82 | |||
| 83 | for(i=0; i<cnt; i++) |
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| 84 | p[i] = x; |
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| 85 | } |
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| 200 | palkovsky | 86 | |
| 87 | /** Fill block of memory |
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| 88 | * |
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| 89 | * Fill cnt words at dst address with the value x. |
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| 90 | * The filling is done word-by-word. |
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| 91 | * |
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| 92 | * @param dst Origin address to fill. |
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| 93 | * @param cnt Number of words to fill. |
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| 94 | * @param x Value to fill. |
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| 95 | * |
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| 96 | */ |
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| 97 | void _memsetw(__address dst, size_t cnt, __u16 x) |
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| 98 | { |
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| 99 | int i; |
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| 202 | palkovsky | 100 | __u16 *p = (__u16 *) dst; |
| 200 | palkovsky | 101 | |
| 102 | for(i=0; i<cnt; i++) |
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| 103 | p[i] = x; |
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| 104 | } |