2 * This file is part of the libpayload project.
4 * Copyright (C) 2008 Advanced Micro Devices, Inc.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. 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 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 #include <libpayload.h>
32 #include <multiboot_tables.h>
34 extern unsigned long loader_eax;
35 extern unsigned long loader_ebx;
37 static void mb_parse_mmap(struct multiboot_header *table,
38 struct sysinfo_t *info)
40 u8 *start = (u8 *) phys_to_virt(table->mmap_addr);
43 info->n_memranges = 0;
45 while(ptr < (start + table->mmap_length)) {
46 struct multiboot_mmap *mmap = (struct multiboot_mmap *) ptr;
48 /* 1 == normal RAM. Ignore everything else for now */
50 if (mmap->type == 1) {
51 info->memrange[info->n_memranges].base = mmap->addr;
52 info->memrange[info->n_memranges].size = mmap->length;
54 if (++info->n_memranges == SYSINFO_MAX_MEM_RANGES)
58 ptr += (mmap->size + sizeof(mmap->size));
62 static void mb_parse_cmdline(struct multiboot_header *table)
65 extern char *main_argv[];
66 char *c = phys_to_virt(table->cmdline);
68 while(*c != '\0' && main_argc < MAX_ARGC_COUNT) {
69 main_argv[main_argc++] = c;
71 for( ; *c != '\0' && !isspace(*c); c++);
80 int get_multiboot_info(struct sysinfo_t *info)
82 struct multiboot_header *table;
84 if (loader_eax != MULTIBOOT_MAGIC)
87 table = (struct multiboot_header *) phys_to_virt(loader_ebx);
89 info->mbtable = phys_to_virt(loader_ebx);
91 if (table->flags & MULTIBOOT_FLAGS_MMAP)
92 mb_parse_mmap(table, info);
94 if (table->flags & MULTIBOOT_FLAGS_CMDLINE)
95 mb_parse_cmdline(table);