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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 | |||
| 1702 | cejka | 29 | /** @addtogroup generic |
| 30 | * @{ |
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| 31 | */ |
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| 32 | |||
| 1264 | jermar | 33 | /** |
| 1702 | cejka | 34 | * @file |
| 1264 | jermar | 35 | * @brief Miscellaneous functions. |
| 36 | */ |
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| 37 | |||
| 1 | jermar | 38 | #include <func.h> |
| 39 | #include <print.h> |
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| 40 | #include <cpu.h> |
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| 41 | #include <arch/asm.h> |
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| 42 | #include <arch.h> |
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| 517 | jermar | 43 | #include <typedefs.h> |
| 607 | palkovsky | 44 | #include <console/kconsole.h> |
| 1 | jermar | 45 | |
| 631 | palkovsky | 46 | atomic_t haltstate = {0}; /**< Halt flag */ |
| 1 | jermar | 47 | |
| 62 | decky | 48 | |
| 49 | /** Halt wrapper |
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| 50 | * |
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| 51 | * Set halt flag and halt the cpu. |
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| 52 | * |
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| 53 | */ |
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| 631 | palkovsky | 54 | void halt() |
| 1 | jermar | 55 | { |
| 631 | palkovsky | 56 | #ifdef CONFIG_DEBUG |
| 659 | jermar | 57 | bool rundebugger = false; |
| 631 | palkovsky | 58 | |
| 59 | // TODO test_and_set not defined on all arches |
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| 60 | // if (!test_and_set(&haltstate)) |
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| 61 | if (!atomic_get(&haltstate)) { |
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| 62 | atomic_set(&haltstate, 1); |
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| 63 | rundebugger = true; |
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| 64 | } |
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| 65 | #else |
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| 1100 | palkovsky | 66 | atomic_set(&haltstate, 1); |
| 631 | palkovsky | 67 | #endif |
| 68 | |||
| 413 | jermar | 69 | interrupts_disable(); |
| 607 | palkovsky | 70 | #ifdef CONFIG_DEBUG |
| 631 | palkovsky | 71 | if (rundebugger) { |
| 72 | printf("\n"); |
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| 73 | kconsole("panic"); /* Run kconsole as a last resort to user */ |
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| 74 | } |
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| 607 | palkovsky | 75 | #endif |
| 227 | jermar | 76 | if (CPU) |
| 77 | printf("cpu%d: halted\n", CPU->id); |
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| 78 | else |
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| 79 | printf("cpu: halted\n"); |
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| 1 | jermar | 80 | cpu_halt(); |
| 81 | } |
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| 82 | |||
| 517 | jermar | 83 | /** Return number of characters in a string. |
| 84 | * |
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| 85 | * @param str NULL terminated string. |
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| 86 | * |
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| 87 | * @return Number of characters in str. |
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| 88 | */ |
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| 89 | size_t strlen(const char *str) |
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| 90 | { |
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| 91 | int i; |
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| 92 | |||
| 93 | for (i = 0; str[i]; i++) |
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| 94 | ; |
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| 95 | |||
| 96 | return i; |
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| 97 | } |
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| 1 | jermar | 98 | |
| 62 | decky | 99 | /** Compare two NULL terminated strings |
| 100 | * |
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| 517 | jermar | 101 | * Do a char-by-char comparison of two NULL terminated strings. |
| 102 | * The strings are considered equal iff they consist of the same |
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| 103 | * characters on the minimum of their lengths and specified maximal |
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| 104 | * length. |
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| 62 | decky | 105 | * |
| 106 | * @param src First string to compare. |
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| 107 | * @param dst Second string to compare. |
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| 517 | jermar | 108 | * @param len Maximal length for comparison. |
| 62 | decky | 109 | * |
| 601 | palkovsky | 110 | * @return 0 if the strings are equal, -1 if first is smaller, 1 if second smaller. |
| 62 | decky | 111 | * |
| 1 | jermar | 112 | */ |
| 518 | jermar | 113 | int strncmp(const char *src, const char *dst, size_t len) |
| 1 | jermar | 114 | { |
| 115 | int i; |
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| 116 | |||
| 117 | i = 0; |
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| 601 | palkovsky | 118 | for (;*src && *dst && i < len;src++,dst++,i++) { |
| 119 | if (*src < *dst) |
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| 120 | return -1; |
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| 121 | if (*src > *dst) |
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| 122 | return 1; |
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| 1 | jermar | 123 | } |
| 601 | palkovsky | 124 | if (i == len || *src == *dst) |
| 125 | return 0; |
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| 635 | palkovsky | 126 | if (!*src) |
| 601 | palkovsky | 127 | return -1; |
| 1 | jermar | 128 | return 1; |
| 129 | } |
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| 331 | bondari | 130 | |
| 518 | jermar | 131 | /** Copy NULL terminated string. |
| 132 | * |
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| 133 | * Copy at most 'len' characters from string 'src' to 'dest'. |
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| 134 | * If 'src' is shorter than 'len', '\0' is inserted behind the |
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| 135 | * last copied character. |
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| 136 | * |
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| 137 | * @param src Source string. |
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| 1708 | jermar | 138 | * @param dest Destination buffer. |
| 518 | jermar | 139 | * @param len Size of destination buffer. |
| 140 | */ |
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| 141 | void strncpy(char *dest, const char *src, size_t len) |
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| 142 | { |
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| 143 | int i; |
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| 144 | for (i = 0; i < len; i++) { |
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| 145 | if (!(dest[i] = src[i])) |
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| 146 | return; |
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| 147 | } |
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| 585 | palkovsky | 148 | dest[i-1] = '\0'; |
| 518 | jermar | 149 | } |
| 582 | palkovsky | 150 | |
| 151 | /** Convert ascii representation to __native |
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| 152 | * |
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| 153 | * Supports 0x for hexa & 0 for octal notation. |
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| 154 | * Does not check for overflows, does not support negative numbers |
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| 155 | * |
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| 156 | * @param text Textual representation of number |
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| 157 | * @return Converted number or 0 if no valid number ofund |
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| 158 | */ |
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| 159 | __native atoi(const char *text) |
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| 160 | { |
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| 161 | int base = 10; |
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| 162 | __native result = 0; |
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| 163 | |||
| 164 | if (text[0] == '0' && text[1] == 'x') { |
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| 165 | base = 16; |
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| 166 | text += 2; |
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| 167 | } else if (text[0] == '0') |
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| 168 | base = 8; |
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| 169 | |||
| 170 | while (*text) { |
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| 603 | palkovsky | 171 | if (base != 16 && \ |
| 172 | ((*text >= 'A' && *text <= 'F' ) |
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| 173 | || (*text >='a' && *text <='f'))) |
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| 582 | palkovsky | 174 | break; |
| 175 | if (base == 8 && *text >='8') |
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| 176 | break; |
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| 177 | |||
| 591 | palkovsky | 178 | if (*text >= '0' && *text <= '9') { |
| 179 | result *= base; |
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| 582 | palkovsky | 180 | result += *text - '0'; |
| 591 | palkovsky | 181 | } else if (*text >= 'A' && *text <= 'F') { |
| 182 | result *= base; |
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| 582 | palkovsky | 183 | result += *text - 'A' + 10; |
| 603 | palkovsky | 184 | } else if (*text >= 'a' && *text <= 'f') { |
| 185 | result *= base; |
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| 186 | result += *text - 'a' + 10; |
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| 591 | palkovsky | 187 | } else |
| 582 | palkovsky | 188 | break; |
| 189 | text++; |
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| 190 | } |
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| 191 | |||
| 192 | return result; |
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| 193 | } |
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| 1702 | cejka | 194 | |
| 195 | /** @} |
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| 196 | */ |
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| 197 |