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1 | /* |
1 | /* |
2 | * Copyright (c) 2009 Jiri Svoboda |
2 | * Copyright (c) 2009 Jiri Svoboda |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** @addtogroup genarch |
29 | /** @addtogroup genarch |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | /** @file |
32 | /** @file |
33 | */ |
33 | */ |
34 | 34 | ||
35 | #include <genarch/multiboot/multiboot.h> |
35 | #include <genarch/multiboot/multiboot.h> |
36 | #include <arch/types.h> |
36 | #include <arch/types.h> |
37 | #include <typedefs.h> |
37 | #include <typedefs.h> |
38 | #include <config.h> |
38 | #include <config.h> |
39 | #include <string.h> |
39 | #include <string.h> |
40 | #include <macros.h> |
40 | #include <macros.h> |
41 | 41 | ||
42 | /** Extract command name from the multiboot module command line. |
42 | /** Extract command name from the multiboot module command line. |
43 | * |
43 | * |
44 | * @param buf Destination buffer (will always null-terminate). |
44 | * @param buf Destination buffer (will always null-terminate). |
45 | * @param n Size of destination buffer. |
45 | * @param n Size of destination buffer. |
46 | * @param cmd_line Input string (the command line). |
46 | * @param cmd_line Input string (the command line). |
47 | * |
47 | * |
48 | */ |
48 | */ |
49 | static void extract_command(char *buf, size_t n, const char *cmd_line) |
49 | static void extract_command(char *buf, size_t n, const char *cmd_line) |
50 | { |
50 | { |
51 | const char *start, *end, *cp; |
51 | const char *start, *end, *cp; |
52 | size_t max_len; |
52 | size_t max_len; |
53 | 53 | ||
54 | /* Find the first space. */ |
54 | /* Find the first space. */ |
55 | end = strchr(cmd_line, ' '); |
55 | end = strchr(cmd_line, ' '); |
56 | if (end == NULL) |
56 | if (end == NULL) |
57 | end = cmd_line + strlen(cmd_line); |
57 | end = cmd_line + strlen(cmd_line); |
58 | 58 | ||
59 | /* |
59 | /* |
60 | * Find last occurence of '/' before 'end'. If found, place start at |
60 | * Find last occurence of '/' before 'end'. If found, place start at |
61 | * next character. Otherwise, place start at beginning of buffer. |
61 | * next character. Otherwise, place start at beginning of buffer. |
62 | */ |
62 | */ |
63 | cp = end; |
63 | cp = end; |
64 | start = buf; |
64 | start = buf; |
65 | while (cp != start) { |
65 | while (cp != start) { |
66 | if (*cp == '/') { |
66 | if (*cp == '/') { |
67 | start = cp + 1; |
67 | start = cp + 1; |
68 | break; |
68 | break; |
69 | } |
69 | } |
70 | --cp; |
70 | --cp; |
71 | } |
71 | } |
72 | 72 | ||
73 | /* Copy the command and null-terminate the string. */ |
73 | /* Copy the command and null-terminate the string. */ |
74 | max_len = min(n - 1, (size_t) (end - start)); |
74 | max_len = min(n - 1, (size_t) (end - start)); |
75 | strncpy(buf, start, max_len + 1); |
75 | strncpy(buf, start, max_len + 1); |
76 | buf[max_len] = '\0'; |
76 | buf[max_len] = '\0'; |
77 | } |
77 | } |
78 | 78 | ||
79 | /** Parse multiboot information structure. |
79 | /** Parse multiboot information structure. |
80 | * |
80 | * |
81 | * If @a signature does not contain a valid multiboot signature, |
81 | * If @a signature does not contain a valid multiboot signature, |
82 | * assumes no multiboot information is available. |
82 | * assumes no multiboot information is available. |
83 | * |
83 | * |
84 | * @param signature Should contain the multiboot signature. |
84 | * @param signature Should contain the multiboot signature. |
85 | * @param mi Pointer to the multiboot information structure. |
85 | * @param mi Pointer to the multiboot information structure. |
86 | */ |
86 | */ |
87 | void multiboot_info_parse(uint32_t signature, const multiboot_info_t *mi) |
87 | void multiboot_info_parse(uint32_t signature, const multiboot_info_t *mi) |
88 | { |
88 | { |
89 | uint32_t flags; |
89 | uint32_t flags; |
90 | multiboot_mod_t *mods; |
90 | multiboot_mod_t *mods; |
91 | uint32_t i; |
91 | uint32_t i; |
92 | 92 | ||
93 | if (signature == MULTIBOOT_LOADER_MAGIC) |
93 | if (signature == MULTIBOOT_LOADER_MAGIC) |
94 | flags = mi->flags; |
94 | flags = mi->flags; |
95 | else { |
95 | else { |
96 | /* No multiboot info available. */ |
96 | /* No multiboot info available. */ |
97 | flags = 0; |
97 | flags = 0; |
98 | } |
98 | } |
99 | 99 | ||
100 | /* Copy module information. */ |
100 | /* Copy module information. */ |
101 | 101 | ||
102 | if ((flags & MBINFO_FLAGS_MODS) != 0) { |
102 | if ((flags & MBINFO_FLAGS_MODS) != 0) { |
103 | init.cnt = mi->mods_count; |
103 | init.cnt = min(mi->mods_count, CONFIG_INIT_TASKS); |
104 | mods = (multiboot_mod_t *) MULTIBOOT_PTR(mi->mods_addr); |
104 | mods = (multiboot_mod_t *) MULTIBOOT_PTR(mi->mods_addr); |
105 | 105 | ||
106 | for (i = 0; i < init.cnt; i++) { |
106 | for (i = 0; i < init.cnt; i++) { |
107 | init.tasks[i].addr = PA2KA(mods[i].start); |
107 | init.tasks[i].addr = PA2KA(mods[i].start); |
108 | init.tasks[i].size = mods[i].end - mods[i].start; |
108 | init.tasks[i].size = mods[i].end - mods[i].start; |
109 | 109 | ||
110 | /* Copy command line, if available. */ |
110 | /* Copy command line, if available. */ |
111 | if (mods[i].string) { |
111 | if (mods[i].string) { |
112 | extract_command(init.tasks[i].name, |
112 | extract_command(init.tasks[i].name, |
113 | CONFIG_TASK_NAME_BUFLEN, |
113 | CONFIG_TASK_NAME_BUFLEN, |
114 | MULTIBOOT_PTR(mods[i].string)); |
114 | MULTIBOOT_PTR(mods[i].string)); |
115 | } else |
115 | } else |
116 | init.tasks[i].name[0] = '\0'; |
116 | init.tasks[i].name[0] = '\0'; |
117 | } |
117 | } |
118 | } else |
118 | } else |
119 | init.cnt = 0; |
119 | init.cnt = 0; |
120 | 120 | ||
121 | /* Copy memory map. */ |
121 | /* Copy memory map. */ |
122 | 122 | ||
123 | int32_t mmap_length; |
123 | int32_t mmap_length; |
124 | multiboot_mmap_t *mme; |
124 | multiboot_mmap_t *mme; |
125 | uint32_t size; |
125 | uint32_t size; |
126 | 126 | ||
127 | if ((flags & MBINFO_FLAGS_MMAP) != 0) { |
127 | if ((flags & MBINFO_FLAGS_MMAP) != 0) { |
128 | mmap_length = mi->mmap_length; |
128 | mmap_length = mi->mmap_length; |
129 | mme = MULTIBOOT_PTR(mi->mmap_addr); |
129 | mme = MULTIBOOT_PTR(mi->mmap_addr); |
130 | e820counter = 0; |
130 | e820counter = 0; |
131 | 131 | ||
132 | i = 0; |
132 | i = 0; |
133 | while (mmap_length > 0) { |
133 | while ((mmap_length > 0) && (i < MEMMAP_E820_MAX_RECORDS)) { |
134 | e820table[i++] = mme->mm_info; |
134 | e820table[i++] = mme->mm_info; |
135 | 135 | ||
136 | /* Compute address of next structure. */ |
136 | /* Compute address of next structure. */ |
137 | size = sizeof(mme->size) + mme->size; |
137 | size = sizeof(mme->size) + mme->size; |
138 | mme = ((void *) mme) + size; |
138 | mme = ((void *) mme) + size; |
139 | mmap_length -= size; |
139 | mmap_length -= size; |
140 | } |
140 | } |
141 | 141 | ||
142 | e820counter = i; |
142 | e820counter = i; |
143 | } else |
143 | } else |
144 | e820counter = 0; |
144 | e820counter = 0; |
145 | } |
145 | } |
146 | 146 | ||
147 | /** @} |
147 | /** @} |
148 | */ |
148 | */ |
149 | 149 |