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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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49 | * @param buf Destination buffer (will always null-terminate). |
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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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53 | static void extract_command(char *buf, size_t n, const char *cmd_line) |
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54 | { |
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55 | const char *start, *end, *cp; |
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56 | size_t max_len; |
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57 | |||
58 | /* Find the first space. */ |
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59 | end = strchr(cmd_line, ' '); |
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60 | if (end == NULL) end = cmd_line + strlen(cmd_line); |
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61 | |||
62 | /* |
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63 | * Find last occurence of '/' before 'end'. If found, place start at |
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64 | * next character. Otherwise, place start at beginning of buffer. |
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65 | */ |
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66 | cp = end; |
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67 | start = buf; |
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68 | while (cp != start) { |
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69 | if (*cp == '/') { |
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70 | start = cp + 1; |
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71 | break; |
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72 | } |
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73 | --cp; |
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74 | } |
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75 | |||
76 | /* Copy the command and null-terminate the string. */ |
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77 | max_len = min(n - 1, (size_t) (end - start)); |
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78 | strncpy(buf, start, max_len + 1); |
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79 | buf[max_len] = '\0'; |
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80 | } |
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81 | |||
3984 | svoboda | 82 | /** C part of ia32 boot sequence. |
83 | * @param signature Should contain the multiboot signature. |
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84 | * @param mi Pointer to the multiboot information structure. |
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85 | */ |
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86 | void ia32_cboot(uint32_t signature, const mb_info_t *mi) |
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87 | { |
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88 | uint32_t flags; |
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89 | mb_mod_t *mods; |
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90 | uint32_t i; |
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91 | |||
3985 | svoboda | 92 | if (signature == MULTIBOOT_LOADER_MAGIC) { |
93 | flags = mi->flags; |
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94 | } else { |
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95 | /* No multiboot info available. */ |
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96 | flags = 0; |
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97 | } |
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3984 | svoboda | 98 | |
99 | /* Copy module information. */ |
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100 | |||
101 | if ((flags & MBINFO_FLAGS_MODS) != 0) { |
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102 | init.cnt = mi->mods_count; |
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103 | mods = mi->mods_addr; |
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104 | |||
105 | for (i = 0; i < init.cnt; i++) { |
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106 | init.tasks[i].addr = mods[i].start + 0x80000000; |
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107 | init.tasks[i].size = mods[i].end - mods[i].start; |
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3987 | svoboda | 108 | |
109 | /* Copy command line, if available. */ |
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110 | if (mods[i].string) { |
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4012 | svoboda | 111 | extract_command(init.tasks[i].name, |
112 | CONFIG_TASK_NAME_BUFLEN, |
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113 | mods[i].string); |
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3987 | svoboda | 114 | } else { |
115 | init.tasks[i].name[0] = '\0'; |
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116 | } |
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3984 | svoboda | 117 | } |
118 | } else { |
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119 | init.cnt = 0; |
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120 | } |
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121 | |||
122 | /* Copy memory map. */ |
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123 | |||
124 | int32_t mmap_length; |
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125 | mb_mmap_t *mme; |
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126 | uint32_t size; |
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127 | |||
128 | if ((flags & MBINFO_FLAGS_MMAP) != 0) { |
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129 | mmap_length = mi->mmap_length; |
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130 | mme = mi->mmap_addr; |
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131 | e820counter = 0; |
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132 | |||
133 | i = 0; |
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134 | while (mmap_length > 0) { |
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135 | e820table[i++] = mme->mm_info; |
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136 | |||
137 | /* Compute address of next structure. */ |
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138 | size = sizeof(mme->size) + mme->size; |
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139 | mme = ((void *) mme) + size; |
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140 | mmap_length -= size; |
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141 | } |
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142 | |||
143 | e820counter = i; |
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144 | } else { |
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145 | e820counter = 0; |
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146 | } |
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147 | |||
148 | #ifdef CONFIG_SMP |
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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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153 | |||
154 | main_bsp(); |
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155 | } |
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156 | |||
157 | /** @} |
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158 | */ |