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