1 // Multiboot interface support.
3 // Copyright (C) 2015 Vladimir Serbinenko <phcoder@gmail.com>
5 // This file may be distributed under the terms of the GNU LGPLv3 license.
7 #include "config.h" // CONFIG_*
8 #include "malloc.h" // free
9 #include "output.h" // dprintf
10 #include "romfile.h" // romfile_add
11 #include "std/multiboot.h" // MULTIBOOT_*
12 #include "string.h" // memset
13 #include "util.h" // multiboot_init
15 struct mbfs_romfile_s {
16 struct romfile_s file;
21 extract_filename(char *dest, char *src, size_t lim)
24 for (ptr = src; *ptr; ptr++) {
25 if (!(ptr == src || ptr[-1] == ' ' || ptr[-1] == '\t'))
27 /* memcmp stops early if it encounters \0 as it doesn't match name=. */
28 if (memcmp(ptr, "name=", 5) == 0) {
31 for (i = 0, ptr += 5; *ptr && *ptr != ' ' && i < lim; i++) {
41 // Copy a file to memory
43 mbfs_copyfile(struct romfile_s *file, void *dst, u32 maxlen)
45 struct mbfs_romfile_s *cfile;
46 cfile = container_of(file, struct mbfs_romfile_s, file);
47 u32 size = cfile->file.size;
48 void *src = cfile->data;
51 dprintf(3, "Copying data %d@%p to %d@%p\n", size, src, maxlen, dst);
56 iomemcpy(dst, src, size);
60 u32 __VISIBLE entry_elf_eax, entry_elf_ebx;
65 struct multiboot_info *mbi;
66 if (!CONFIG_MULTIBOOT)
68 dprintf(1, "multiboot: eax=%x, ebx=%x\n", entry_elf_eax, entry_elf_ebx);
69 if (entry_elf_eax != MULTIBOOT_BOOTLOADER_MAGIC)
71 mbi = (void *)entry_elf_ebx;
72 dprintf(1, "mbptr=%p\n", mbi);
73 dprintf(1, "flags=0x%x, mods=0x%x, mods_c=%d\n", mbi->flags, mbi->mods_addr,
75 if (!(mbi->flags & MULTIBOOT_INFO_MODS))
78 struct multiboot_mod_list *mod = (void *)mbi->mods_addr;
79 for (i = 0; i < mbi->mods_count; i++) {
80 struct mbfs_romfile_s *cfile;
85 len = mod[i].mod_end - mod[i].mod_start;
86 cfile = malloc_tmp(sizeof(*cfile));
91 memset(cfile, 0, sizeof(*cfile));
92 dprintf(1, "module %s, size 0x%x\n", (char *)mod[i].cmdline, len);
93 if (!extract_filename(cfile->file.name, (char *)mod[i].cmdline,
94 sizeof(cfile->file.name))) {
98 dprintf(1, "assigned file name <%s>\n", cfile->file.name);
99 cfile->file.size = len;
100 copy = malloc_tmp(len);
106 memcpy(copy, (void *)mod[i].mod_start, len);
107 cfile->file.copy = mbfs_copyfile;
109 romfile_add(&cfile->file);