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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 | /** @addtogroup generic |
29 | /** @addtogroup generic |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | 32 | ||
33 | /** |
33 | /** |
34 | * @file |
34 | * @file |
35 | * @brief Miscellaneous functions. |
35 | * @brief Miscellaneous functions. |
36 | */ |
36 | */ |
37 | 37 | ||
38 | #include <func.h> |
38 | #include <func.h> |
39 | #include <print.h> |
39 | #include <print.h> |
40 | #include <cpu.h> |
40 | #include <cpu.h> |
41 | #include <arch/asm.h> |
41 | #include <arch/asm.h> |
42 | #include <arch.h> |
42 | #include <arch.h> |
43 | #include <typedefs.h> |
43 | #include <typedefs.h> |
44 | #include <console/kconsole.h> |
44 | #include <console/kconsole.h> |
45 | 45 | ||
46 | atomic_t haltstate = {0}; /**< Halt flag */ |
46 | atomic_t haltstate = {0}; /**< Halt flag */ |
47 | 47 | ||
48 | 48 | ||
49 | /** Halt wrapper |
49 | /** Halt wrapper |
50 | * |
50 | * |
51 | * Set halt flag and halt the cpu. |
51 | * Set halt flag and halt the cpu. |
52 | * |
52 | * |
53 | */ |
53 | */ |
54 | void halt() |
54 | void halt() |
55 | { |
55 | { |
56 | #ifdef CONFIG_DEBUG |
56 | #ifdef CONFIG_DEBUG |
57 | bool rundebugger = false; |
57 | bool rundebugger = false; |
58 | 58 | ||
59 | // TODO test_and_set not defined on all arches |
59 | // TODO test_and_set not defined on all arches |
60 | // if (!test_and_set(&haltstate)) |
60 | // if (!test_and_set(&haltstate)) |
61 | if (!atomic_get(&haltstate)) { |
61 | if (!atomic_get(&haltstate)) { |
62 | atomic_set(&haltstate, 1); |
62 | atomic_set(&haltstate, 1); |
63 | rundebugger = true; |
63 | rundebugger = true; |
64 | } |
64 | } |
65 | #else |
65 | #else |
66 | atomic_set(&haltstate, 1); |
66 | atomic_set(&haltstate, 1); |
67 | #endif |
67 | #endif |
68 | 68 | ||
69 | interrupts_disable(); |
69 | interrupts_disable(); |
70 | #ifdef CONFIG_DEBUG |
70 | #ifdef CONFIG_DEBUG |
71 | if (rundebugger) { |
71 | if (rundebugger) { |
72 | printf("\n"); |
72 | printf("\n"); |
73 | kconsole("panic"); /* Run kconsole as a last resort to user */ |
73 | kconsole("panic"); /* Run kconsole as a last resort to user */ |
74 | } |
74 | } |
75 | #endif |
75 | #endif |
76 | if (CPU) |
76 | if (CPU) |
77 | printf("cpu%d: halted\n", CPU->id); |
77 | printf("cpu%d: halted\n", CPU->id); |
78 | else |
78 | else |
79 | printf("cpu: halted\n"); |
79 | printf("cpu: halted\n"); |
80 | cpu_halt(); |
80 | cpu_halt(); |
81 | } |
81 | } |
82 | 82 | ||
83 | /** Return number of characters in a string. |
83 | /** Return number of characters in a string. |
84 | * |
84 | * |
85 | * @param str NULL terminated string. |
85 | * @param str NULL terminated string. |
86 | * |
86 | * |
87 | * @return Number of characters in str. |
87 | * @return Number of characters in str. |
88 | */ |
88 | */ |
89 | size_t strlen(const char *str) |
89 | size_t strlen(const char *str) |
90 | { |
90 | { |
91 | int i; |
91 | int i; |
92 | 92 | ||
93 | for (i = 0; str[i]; i++) |
93 | for (i = 0; str[i]; i++) |
94 | ; |
94 | ; |
95 | 95 | ||
96 | return i; |
96 | return i; |
97 | } |
97 | } |
98 | 98 | ||
99 | /** Compare two NULL terminated strings |
99 | /** Compare two NULL terminated strings |
100 | * |
100 | * |
101 | * Do a char-by-char comparison of two NULL terminated strings. |
101 | * Do a char-by-char comparison of two NULL terminated strings. |
102 | * The strings are considered equal iff they consist of the same |
102 | * The strings are considered equal iff they consist of the same |
- | 103 | * characters on the minimum of their lengths. |
|
- | 104 | * |
|
- | 105 | * @param src First string to compare. |
|
- | 106 | * @param dst Second string to compare. |
|
- | 107 | * |
|
- | 108 | * @return 0 if the strings are equal, -1 if first is smaller, 1 if second smaller. |
|
- | 109 | * |
|
- | 110 | */ |
|
- | 111 | int strcmp(const char *src, const char *dst) |
|
- | 112 | { |
|
- | 113 | for (; *src && *dst; src++, dst++) { |
|
- | 114 | if (*src < *dst) |
|
- | 115 | return -1; |
|
- | 116 | if (*src > *dst) |
|
- | 117 | return 1; |
|
- | 118 | } |
|
- | 119 | if (*src == *dst) |
|
- | 120 | return 0; |
|
- | 121 | if (!*src) |
|
- | 122 | return -1; |
|
- | 123 | return 1; |
|
- | 124 | } |
|
- | 125 | ||
- | 126 | ||
- | 127 | /** Compare two NULL terminated strings |
|
- | 128 | * |
|
- | 129 | * Do a char-by-char comparison of two NULL terminated strings. |
|
- | 130 | * The strings are considered equal iff they consist of the same |
|
103 | * characters on the minimum of their lengths and specified maximal |
131 | * characters on the minimum of their lengths and specified maximal |
104 | * length. |
132 | * length. |
105 | * |
133 | * |
106 | * @param src First string to compare. |
134 | * @param src First string to compare. |
107 | * @param dst Second string to compare. |
135 | * @param dst Second string to compare. |
108 | * @param len Maximal length for comparison. |
136 | * @param len Maximal length for comparison. |
109 | * |
137 | * |
110 | * @return 0 if the strings are equal, -1 if first is smaller, 1 if second smaller. |
138 | * @return 0 if the strings are equal, -1 if first is smaller, 1 if second smaller. |
111 | * |
139 | * |
112 | */ |
140 | */ |
113 | int strncmp(const char *src, const char *dst, size_t len) |
141 | int strncmp(const char *src, const char *dst, size_t len) |
114 | { |
142 | { |
115 | int i; |
143 | int i; |
116 | 144 | ||
117 | i = 0; |
- | |
118 | for (;*src && *dst && i < len;src++,dst++,i++) { |
145 | for (i = 0; *src && *dst && i < len; src++, dst++, i++) { |
119 | if (*src < *dst) |
146 | if (*src < *dst) |
120 | return -1; |
147 | return -1; |
121 | if (*src > *dst) |
148 | if (*src > *dst) |
122 | return 1; |
149 | return 1; |
123 | } |
150 | } |
124 | if (i == len || *src == *dst) |
151 | if (i == len || *src == *dst) |
125 | return 0; |
152 | return 0; |
126 | if (!*src) |
153 | if (!*src) |
127 | return -1; |
154 | return -1; |
128 | return 1; |
155 | return 1; |
129 | } |
156 | } |
130 | 157 | ||
- | 158 | ||
- | 159 | ||
131 | /** Copy NULL terminated string. |
160 | /** Copy NULL terminated string. |
132 | * |
161 | * |
133 | * Copy at most 'len' characters from string 'src' to 'dest'. |
162 | * Copy at most 'len' characters from string 'src' to 'dest'. |
134 | * If 'src' is shorter than 'len', '\0' is inserted behind the |
163 | * If 'src' is shorter than 'len', '\0' is inserted behind the |
135 | * last copied character. |
164 | * last copied character. |
136 | * |
165 | * |
137 | * @param src Source string. |
166 | * @param src Source string. |
138 | * @param dest Destination buffer. |
167 | * @param dest Destination buffer. |
139 | * @param len Size of destination buffer. |
168 | * @param len Size of destination buffer. |
140 | */ |
169 | */ |
141 | void strncpy(char *dest, const char *src, size_t len) |
170 | void strncpy(char *dest, const char *src, size_t len) |
142 | { |
171 | { |
143 | int i; |
172 | int i; |
144 | for (i = 0; i < len; i++) { |
173 | for (i = 0; i < len; i++) { |
145 | if (!(dest[i] = src[i])) |
174 | if (!(dest[i] = src[i])) |
146 | return; |
175 | return; |
147 | } |
176 | } |
148 | dest[i-1] = '\0'; |
177 | dest[i-1] = '\0'; |
149 | } |
178 | } |
150 | 179 | ||
151 | /** Convert ascii representation to unative_t |
180 | /** Convert ascii representation to unative_t |
152 | * |
181 | * |
153 | * Supports 0x for hexa & 0 for octal notation. |
182 | * Supports 0x for hexa & 0 for octal notation. |
154 | * Does not check for overflows, does not support negative numbers |
183 | * Does not check for overflows, does not support negative numbers |
155 | * |
184 | * |
156 | * @param text Textual representation of number |
185 | * @param text Textual representation of number |
157 | * @return Converted number or 0 if no valid number ofund |
186 | * @return Converted number or 0 if no valid number ofund |
158 | */ |
187 | */ |
159 | unative_t atoi(const char *text) |
188 | unative_t atoi(const char *text) |
160 | { |
189 | { |
161 | int base = 10; |
190 | int base = 10; |
162 | unative_t result = 0; |
191 | unative_t result = 0; |
163 | 192 | ||
164 | if (text[0] == '0' && text[1] == 'x') { |
193 | if (text[0] == '0' && text[1] == 'x') { |
165 | base = 16; |
194 | base = 16; |
166 | text += 2; |
195 | text += 2; |
167 | } else if (text[0] == '0') |
196 | } else if (text[0] == '0') |
168 | base = 8; |
197 | base = 8; |
169 | 198 | ||
170 | while (*text) { |
199 | while (*text) { |
171 | if (base != 16 && \ |
200 | if (base != 16 && \ |
172 | ((*text >= 'A' && *text <= 'F' ) |
201 | ((*text >= 'A' && *text <= 'F' ) |
173 | || (*text >='a' && *text <='f'))) |
202 | || (*text >='a' && *text <='f'))) |
174 | break; |
203 | break; |
175 | if (base == 8 && *text >='8') |
204 | if (base == 8 && *text >='8') |
176 | break; |
205 | break; |
177 | 206 | ||
178 | if (*text >= '0' && *text <= '9') { |
207 | if (*text >= '0' && *text <= '9') { |
179 | result *= base; |
208 | result *= base; |
180 | result += *text - '0'; |
209 | result += *text - '0'; |
181 | } else if (*text >= 'A' && *text <= 'F') { |
210 | } else if (*text >= 'A' && *text <= 'F') { |
182 | result *= base; |
211 | result *= base; |
183 | result += *text - 'A' + 10; |
212 | result += *text - 'A' + 10; |
184 | } else if (*text >= 'a' && *text <= 'f') { |
213 | } else if (*text >= 'a' && *text <= 'f') { |
185 | result *= base; |
214 | result *= base; |
186 | result += *text - 'a' + 10; |
215 | result += *text - 'a' + 10; |
187 | } else |
216 | } else |
188 | break; |
217 | break; |
189 | text++; |
218 | text++; |
190 | } |
219 | } |
191 | 220 | ||
192 | return result; |
221 | return result; |
193 | } |
222 | } |
194 | 223 | ||
195 | /** @} |
224 | /** @} |
196 | */ |
225 | */ |
197 | 226 |