Subversion Repositories HelenOS

Rev

Rev 4193 | Rev 4220 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
1 jermar 1 
/*
4015 decky 2 
 * Copyright (c) 2009 Jiri Svoboda
1 jermar 3 
 * All rights reserved.
4 
 *
5 
 * Redistribution and use in source and binary forms, with or without
6 
 * modification, are permitted provided that the following conditions
7 
 * are met:
8 
 *
9 
 * - Redistributions of source code must retain the above copyright
10 
 *   notice, this list of conditions and the following disclaimer.
11 
 * - Redistributions in binary form must reproduce the above copyright
12 
 *   notice, this list of conditions and the following disclaimer in the
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
15 
 *   derived from this software without specific prior written permission.
16 
 *
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
19 
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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
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
26 
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 
 */
28 
 
4022 svoboda 29 
/** @addtogroup genarch
1702 cejka 30 
 * @{
31 
 */
32 
/** @file
33 
 */
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>
1 jermar 41 
 
4015 decky 42 
/** Extract command name from the multiboot module command line.
43 
 *
44 
 * @param buf      Destination buffer (will always null-terminate).
45 
 * @param n        Size of destination buffer.
46 
 * @param cmd_line Input string (the command line).
47 
 *
48 
 */
49 
static void extract_command(char *buf, size_t n, const char *cmd_line)
50 
{
51 
    const char *start, *end, *cp;
52 
    size_t max_len;
53 
 
54 
    /* Find the first space. */
55 
    end = strchr(cmd_line, ' ');
56 
    if (end == NULL)
4207 svoboda 57 
        end = cmd_line + str_size(cmd_line);
4015 decky 58 
 
59 
    /*
60 
     * Find last occurence of '/' before 'end'. If found, place start at
61 
     * next character. Otherwise, place start at beginning of buffer.
62 
     */
63 
    cp = end;
64 
    start = buf;
65 
    while (cp != start) {
66 
        if (*cp == '/') {
67 
            start = cp + 1;
68 
            break;
69 
        }
70 
        --cp;
71 
    }
72 
 
73 
    /* Copy the command and null-terminate the string. */
74 
    max_len = min(n - 1, (size_t) (end - start));
75 
    strncpy(buf, start, max_len + 1);
76 
    buf[max_len] = '\0';
77 
}
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.
83 
 *
4015 decky 84 
 * @param signature Should contain the multiboot signature.
85 
 * @param mi        Pointer to the multiboot information structure.
86 
 */
4022 svoboda 87 
void multiboot_info_parse(uint32_t signature, const multiboot_info_t *mi)
4015 decky 88 
{
89 
    uint32_t flags;
4022 svoboda 90 
    multiboot_mod_t *mods;
4015 decky 91 
    uint32_t i;
92 
 
93 
    if (signature == MULTIBOOT_LOADER_MAGIC)
94 
        flags = mi->flags;
95 
    else {
96 
        /* No multiboot info available. */
97 
        flags = 0;
98 
    }
99 
 
100 
    /* Copy module information. */
101 
 
102 
    if ((flags & MBINFO_FLAGS_MODS) != 0) {
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++) {
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. */
111 
            if (mods[i].string) {
112 
                extract_command(init.tasks[i].name,
113 
                    CONFIG_TASK_NAME_BUFLEN,
4022 svoboda 114 
                    MULTIBOOT_PTR(mods[i].string));
4015 decky 115 
            } else
116 
                init.tasks[i].name[0] = '\0';
117 
        }
118 
    } else
119 
        init.cnt = 0;
120 
 
121 
    /* Copy memory map. */
122 
 
123 
    int32_t mmap_length;
4022 svoboda 124 
    multiboot_mmap_t *mme;
4015 decky 125 
    uint32_t size;
126 
 
127 
    if ((flags & MBINFO_FLAGS_MMAP) != 0) {
128 
        mmap_length = mi->mmap_length;
4022 svoboda 129 
        mme = MULTIBOOT_PTR(mi->mmap_addr);
4015 decky 130 
        e820counter = 0;
131 
 
132 
        i = 0;
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. */
137 
            size = sizeof(mme->size) + mme->size;
138 
            mme = ((void *) mme) + size;
139 
            mmap_length -= size;
140 
        }
141 
 
142 
        e820counter = i;
143 
    } else
144 
        e820counter = 0;
145 
}
146 
 
1888 jermar 147 
/** @}
1702 cejka 148 
 */