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