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3984 | svoboda | 1 | /* |
2 | * Copyright (c) 2009 Jiri Svoboda |
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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 | /** @addtogroup ia32 |
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30 | * @{ |
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31 | */ |
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32 | /** @file |
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33 | */ |
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34 | |||
35 | #include <main/main.h> |
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36 | #include <arch/boot/boot.h> |
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37 | #include <arch/boot/cboot.h> |
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38 | #include <arch/boot/memmap.h> |
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39 | #include <config.h> |
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40 | #include <memstr.h> |
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4011 | svoboda | 41 | #include <string.h> |
4012 | svoboda | 42 | #include <macros.h> |
3984 | svoboda | 43 | |
44 | /* This is a symbol so the type is only dummy. Obtain the value using &. */ |
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45 | extern int _hardcoded_unmapped_size; |
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46 | |||
4012 | svoboda | 47 | /** Extract command name from the multiboot module command line. |
48 | * |
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4014 | decky | 49 | * @param buf Destination buffer (will always null-terminate). |
50 | * @param n Size of destination buffer. |
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51 | * @param cmd_line Input string (the command line). |
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52 | * |
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4012 | svoboda | 53 | */ |
54 | static void extract_command(char *buf, size_t n, const char *cmd_line) |
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55 | { |
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56 | const char *start, *end, *cp; |
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57 | size_t max_len; |
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4014 | decky | 58 | |
4012 | svoboda | 59 | /* Find the first space. */ |
60 | end = strchr(cmd_line, ' '); |
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4014 | decky | 61 | if (end == NULL) |
62 | end = cmd_line + strlen(cmd_line); |
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63 | |||
4012 | svoboda | 64 | /* |
65 | * Find last occurence of '/' before 'end'. If found, place start at |
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66 | * next character. Otherwise, place start at beginning of buffer. |
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67 | */ |
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68 | cp = end; |
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69 | start = buf; |
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70 | while (cp != start) { |
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71 | if (*cp == '/') { |
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72 | start = cp + 1; |
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73 | break; |
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74 | } |
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75 | --cp; |
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76 | } |
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4014 | decky | 77 | |
4012 | svoboda | 78 | /* Copy the command and null-terminate the string. */ |
79 | max_len = min(n - 1, (size_t) (end - start)); |
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80 | strncpy(buf, start, max_len + 1); |
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81 | buf[max_len] = '\0'; |
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82 | } |
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83 | |||
3984 | svoboda | 84 | /** C part of ia32 boot sequence. |
4014 | decky | 85 | * |
86 | * @param signature Should contain the multiboot signature. |
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87 | * @param mi Pointer to the multiboot information structure. |
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3984 | svoboda | 88 | */ |
89 | void ia32_cboot(uint32_t signature, const mb_info_t *mi) |
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90 | { |
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91 | uint32_t flags; |
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92 | mb_mod_t *mods; |
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93 | uint32_t i; |
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4014 | decky | 94 | |
95 | if (signature == MULTIBOOT_LOADER_MAGIC) |
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3985 | svoboda | 96 | flags = mi->flags; |
4014 | decky | 97 | else { |
3985 | svoboda | 98 | /* No multiboot info available. */ |
99 | flags = 0; |
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100 | } |
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4014 | decky | 101 | |
3984 | svoboda | 102 | /* Copy module information. */ |
4014 | decky | 103 | |
3984 | svoboda | 104 | if ((flags & MBINFO_FLAGS_MODS) != 0) { |
105 | init.cnt = mi->mods_count; |
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106 | mods = mi->mods_addr; |
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4014 | decky | 107 | |
3984 | svoboda | 108 | for (i = 0; i < init.cnt; i++) { |
109 | init.tasks[i].addr = mods[i].start + 0x80000000; |
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110 | init.tasks[i].size = mods[i].end - mods[i].start; |
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4014 | decky | 111 | |
3987 | svoboda | 112 | /* Copy command line, if available. */ |
113 | if (mods[i].string) { |
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4012 | svoboda | 114 | extract_command(init.tasks[i].name, |
115 | CONFIG_TASK_NAME_BUFLEN, |
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116 | mods[i].string); |
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4014 | decky | 117 | } else |
3987 | svoboda | 118 | init.tasks[i].name[0] = '\0'; |
3984 | svoboda | 119 | } |
4014 | decky | 120 | } else |
3984 | svoboda | 121 | init.cnt = 0; |
4014 | decky | 122 | |
3984 | svoboda | 123 | /* Copy memory map. */ |
4014 | decky | 124 | |
3984 | svoboda | 125 | int32_t mmap_length; |
126 | mb_mmap_t *mme; |
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127 | uint32_t size; |
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4014 | decky | 128 | |
3984 | svoboda | 129 | if ((flags & MBINFO_FLAGS_MMAP) != 0) { |
130 | mmap_length = mi->mmap_length; |
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131 | mme = mi->mmap_addr; |
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132 | e820counter = 0; |
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4014 | decky | 133 | |
3984 | svoboda | 134 | i = 0; |
135 | while (mmap_length > 0) { |
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136 | e820table[i++] = mme->mm_info; |
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4014 | decky | 137 | |
3984 | svoboda | 138 | /* Compute address of next structure. */ |
139 | size = sizeof(mme->size) + mme->size; |
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140 | mme = ((void *) mme) + size; |
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141 | mmap_length -= size; |
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142 | } |
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4014 | decky | 143 | |
3984 | svoboda | 144 | e820counter = i; |
4014 | decky | 145 | } else |
3984 | svoboda | 146 | e820counter = 0; |
4014 | decky | 147 | |
3984 | svoboda | 148 | #ifdef CONFIG_SMP |
149 | /* Copy AP bootstrap routines below 1 MB. */ |
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150 | memcpy((void *) AP_BOOT_OFFSET, (void *) BOOT_OFFSET, |
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151 | (size_t) &_hardcoded_unmapped_size); |
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152 | #endif |
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4014 | decky | 153 | |
3984 | svoboda | 154 | main_bsp(); |
155 | } |
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156 | |||
157 | /** @} |
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158 | */ |