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1 | /* |
1 | /* |
2 | * Copyright (C) 2001-2004 Jakub Jermar |
2 | * Copyright (C) 2001-2004 Jakub Jermar |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** |
29 | /** |
30 | * @file memstr.c |
30 | * @file memstr.c |
31 | * @brief Memory string operations. |
31 | * @brief Memory string operations. |
32 | * |
32 | * |
33 | * This file provides architecture independent functions |
33 | * This file provides architecture independent functions |
34 | * to manipulate blocks of memory. These functions |
34 | * to manipulate blocks of memory. These functions |
35 | * are optimized as much as generic functions of |
35 | * are optimized as much as generic functions of |
36 | * this type can be. However, architectures are |
36 | * this type can be. However, architectures are |
37 | * free to provide even more optimized versions of these |
37 | * free to provide even more optimized versions of these |
38 | * functions. |
38 | * functions. |
39 | */ |
39 | */ |
40 | 40 | ||
41 | #include <memstr.h> |
41 | #include <memstr.h> |
42 | #include <arch/types.h> |
42 | #include <arch/types.h> |
43 | #include <align.h> |
43 | #include <align.h> |
44 | 44 | ||
45 | /** Copy block of memory |
45 | /** Copy block of memory |
46 | * |
46 | * |
47 | * Copy cnt bytes from src address to dst address. |
47 | * Copy cnt bytes from src address to dst address. |
48 | * The copying is done word-by-word and then byte-by-byte. |
48 | * The copying is done word-by-word and then byte-by-byte. |
49 | * The source and destination memory areas cannot overlap. |
49 | * The source and destination memory areas cannot overlap. |
50 | * |
50 | * |
51 | * @param src Origin address to copy from. |
51 | * @param src Origin address to copy from. |
52 | * @param dst Origin address to copy to. |
52 | * @param dst Origin address to copy to. |
53 | * @param cnt Number of bytes to copy. |
53 | * @param cnt Number of bytes to copy. |
54 | * |
54 | * |
55 | */ |
55 | */ |
56 | void *_memcpy(void * dst, const void *src, size_t cnt) |
56 | void *_memcpy(void * dst, const void *src, size_t cnt) |
57 | { |
57 | { |
58 | int i, j; |
58 | int i, j; |
59 | 59 | ||
60 | if (ALIGN_UP((__address) src, sizeof(__native)) != (__address) src || |
60 | if (ALIGN_UP((__address) src, sizeof(__native)) != (__address) src || |
61 | ALIGN_UP((__address) dst, sizeof(__native)) != (__address) dst) { |
61 | ALIGN_UP((__address) dst, sizeof(__native)) != (__address) dst) { |
62 | for (i = 0; i < cnt; i++) |
62 | for (i = 0; i < cnt; i++) |
63 | ((__u8 *) dst)[i] = ((__u8 *) src)[i]; |
63 | ((__u8 *) dst)[i] = ((__u8 *) src)[i]; |
64 | } else { |
64 | } else { |
65 | 65 | ||
66 | for (i = 0; i < cnt/sizeof(__native); i++) |
66 | for (i = 0; i < cnt/sizeof(__native); i++) |
67 | ((__native *) dst)[i] = ((__native *) src)[i]; |
67 | ((__native *) dst)[i] = ((__native *) src)[i]; |
68 | 68 | ||
69 | for (j = 0; j < cnt%sizeof(__native); j++) |
69 | for (j = 0; j < cnt%sizeof(__native); j++) |
70 | ((__u8 *)(((__native *) dst) + i))[j] = ((__u8 *)(((__native *) src) + i))[j]; |
70 | ((__u8 *)(((__native *) dst) + i))[j] = ((__u8 *)(((__native *) src) + i))[j]; |
71 | } |
71 | } |
72 | 72 | ||
73 | return (char *)src; |
73 | return (char *)src; |
74 | } |
74 | } |
75 | 75 | ||
76 | /** Fill block of memory |
76 | /** Fill block of memory |
77 | * |
77 | * |
78 | * Fill cnt bytes at dst address with the value x. |
78 | * Fill cnt bytes at dst address with the value x. |
79 | * The filling is done byte-by-byte. |
79 | * The filling is done byte-by-byte. |
80 | * |
80 | * |
81 | * @param dst Origin address to fill. |
81 | * @param dst Origin address to fill. |
82 | * @param cnt Number of bytes to fill. |
82 | * @param cnt Number of bytes to fill. |
83 | * @param x Value to fill. |
83 | * @param x Value to fill. |
84 | * |
84 | * |
85 | */ |
85 | */ |
86 | void _memsetb(__address dst, size_t cnt, __u8 x) |
86 | void _memsetb(__address dst, size_t cnt, __u8 x) |
87 | { |
87 | { |
88 | int i; |
88 | int i; |
89 | __u8 *p = (__u8 *) dst; |
89 | __u8 *p = (__u8 *) dst; |
90 | 90 | ||
91 | for(i=0; i<cnt; i++) |
91 | for(i=0; i<cnt; i++) |
92 | p[i] = x; |
92 | p[i] = x; |
93 | } |
93 | } |
94 | 94 | ||
95 | /** Fill block of memory |
95 | /** Fill block of memory |
96 | * |
96 | * |
97 | * Fill cnt words at dst address with the value x. |
97 | * Fill cnt words at dst address with the value x. |
98 | * The filling is done word-by-word. |
98 | * The filling is done word-by-word. |
99 | * |
99 | * |
100 | * @param dst Origin address to fill. |
100 | * @param dst Origin address to fill. |
101 | * @param cnt Number of words to fill. |
101 | * @param cnt Number of words to fill. |
102 | * @param x Value to fill. |
102 | * @param x Value to fill. |
103 | * |
103 | * |
104 | */ |
104 | */ |
105 | void _memsetw(__address dst, size_t cnt, __u16 x) |
105 | void _memsetw(__address dst, size_t cnt, __u16 x) |
106 | { |
106 | { |
107 | int i; |
107 | int i; |
108 | __u16 *p = (__u16 *) dst; |
108 | __u16 *p = (__u16 *) dst; |
109 | 109 | ||
110 | for(i=0; i<cnt; i++) |
110 | for(i=0; i<cnt; i++) |
111 | p[i] = x; |
111 | p[i] = x; |
112 | } |
112 | } |
113 | 113 |