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| Rev | Author | Line No. | Line |
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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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| 4201 | trochtova | 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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| 4201 | trochtova | 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 | */ |