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1 | jermar | 1 | /* |
4015 | decky | 2 | * Copyright (c) 2009 Jiri Svoboda |
1 | jermar | 3 | * All rights reserved. |
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 | |||
4022 | svoboda | 29 | /** @addtogroup genarch |
1702 | cejka | 30 | * @{ |
31 | */ |
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32 | /** @file |
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33 | */ |
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34 | |||
4022 | svoboda | 35 | #include <genarch/multiboot/multiboot.h> |
1 | jermar | 36 | #include <arch/types.h> |
4022 | svoboda | 37 | #include <typedefs.h> |
1 | jermar | 38 | #include <config.h> |
4015 | decky | 39 | #include <string.h> |
40 | #include <macros.h> |
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1 | jermar | 41 | |
4015 | decky | 42 | /** Extract command name from the multiboot module command line. |
43 | * |
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44 | * @param buf Destination buffer (will always null-terminate). |
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45 | * @param n Size of destination buffer. |
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46 | * @param cmd_line Input string (the command line). |
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47 | * |
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48 | */ |
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49 | static void extract_command(char *buf, size_t n, const char *cmd_line) |
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50 | { |
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51 | const char *start, *end, *cp; |
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52 | size_t max_len; |
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53 | |||
54 | /* Find the first space. */ |
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55 | end = strchr(cmd_line, ' '); |
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56 | if (end == NULL) |
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57 | end = cmd_line + strlen(cmd_line); |
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58 | |||
59 | /* |
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60 | * Find last occurence of '/' before 'end'. If found, place start at |
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61 | * next character. Otherwise, place start at beginning of buffer. |
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62 | */ |
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63 | cp = end; |
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64 | start = buf; |
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65 | while (cp != start) { |
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66 | if (*cp == '/') { |
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67 | start = cp + 1; |
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68 | break; |
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69 | } |
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70 | --cp; |
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71 | } |
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72 | |||
73 | /* Copy the command and null-terminate the string. */ |
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74 | max_len = min(n - 1, (size_t) (end - start)); |
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75 | strncpy(buf, start, max_len + 1); |
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76 | buf[max_len] = '\0'; |
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77 | } |
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78 | |||
4022 | svoboda | 79 | /** Parse multiboot information structure. |
4015 | decky | 80 | * |
4022 | svoboda | 81 | * If @a signature does not contain a valid multiboot signature, |
82 | * assumes no multiboot information is available. |
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83 | * |
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4015 | decky | 84 | * @param signature Should contain the multiboot signature. |
85 | * @param mi Pointer to the multiboot information structure. |
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86 | */ |
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4022 | svoboda | 87 | void multiboot_info_parse(uint32_t signature, const multiboot_info_t *mi) |
4015 | decky | 88 | { |
89 | uint32_t flags; |
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4022 | svoboda | 90 | multiboot_mod_t *mods; |
4015 | decky | 91 | uint32_t i; |
92 | |||
93 | if (signature == MULTIBOOT_LOADER_MAGIC) |
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94 | flags = mi->flags; |
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95 | else { |
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96 | /* No multiboot info available. */ |
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97 | flags = 0; |
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98 | } |
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99 | |||
100 | /* Copy module information. */ |
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101 | |||
102 | if ((flags & MBINFO_FLAGS_MODS) != 0) { |
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4193 | decky | 103 | init.cnt = min(mi->mods_count, CONFIG_INIT_TASKS); |
4022 | svoboda | 104 | mods = (multiboot_mod_t *) MULTIBOOT_PTR(mi->mods_addr); |
4015 | decky | 105 | |
106 | for (i = 0; i < init.cnt; i++) { |
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4022 | svoboda | 107 | init.tasks[i].addr = PA2KA(mods[i].start); |
4015 | decky | 108 | init.tasks[i].size = mods[i].end - mods[i].start; |
109 | |||
110 | /* Copy command line, if available. */ |
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111 | if (mods[i].string) { |
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112 | extract_command(init.tasks[i].name, |
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113 | CONFIG_TASK_NAME_BUFLEN, |
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4022 | svoboda | 114 | MULTIBOOT_PTR(mods[i].string)); |
4015 | decky | 115 | } else |
116 | init.tasks[i].name[0] = '\0'; |
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117 | } |
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118 | } else |
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119 | init.cnt = 0; |
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120 | |||
121 | /* Copy memory map. */ |
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122 | |||
123 | int32_t mmap_length; |
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4022 | svoboda | 124 | multiboot_mmap_t *mme; |
4015 | decky | 125 | uint32_t size; |
126 | |||
127 | if ((flags & MBINFO_FLAGS_MMAP) != 0) { |
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128 | mmap_length = mi->mmap_length; |
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4022 | svoboda | 129 | mme = MULTIBOOT_PTR(mi->mmap_addr); |
4015 | decky | 130 | e820counter = 0; |
131 | |||
132 | i = 0; |
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4193 | decky | 133 | while ((mmap_length > 0) && (i < MEMMAP_E820_MAX_RECORDS)) { |
4015 | decky | 134 | e820table[i++] = mme->mm_info; |
135 | |||
136 | /* Compute address of next structure. */ |
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137 | size = sizeof(mme->size) + mme->size; |
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138 | mme = ((void *) mme) + size; |
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139 | mmap_length -= size; |
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140 | } |
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141 | |||
142 | e820counter = i; |
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143 | } else |
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144 | e820counter = 0; |
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145 | } |
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146 | |||
1888 | jermar | 147 | /** @} |
1702 | cejka | 148 | */ |