blob: 290283e8edb6acf0ee34f7859c9951b7e66b0d8d [file] [log] [blame]
/*
* This file is part of the libpayload project.
*
* Copyright (C) 2008 Advanced Micro Devices, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <libpayload-config.h>
#include <libpayload.h>
#include <multiboot_tables.h>
extern unsigned long loader_eax;
extern unsigned long loader_ebx;
static void mb_parse_mmap(struct multiboot_header *table,
struct sysinfo_t *info)
{
u8 *start = (u8 *) phys_to_virt(table->mmap_addr);
u8 *ptr = start;
info->n_memranges = 0;
while(ptr < (start + table->mmap_length)) {
struct multiboot_mmap *mmap = (struct multiboot_mmap *) ptr;
/* 1 == normal RAM. Ignore everything else for now */
if (mmap->type == 1) {
info->memrange[info->n_memranges].base = mmap->addr;
info->memrange[info->n_memranges].size = mmap->length;
if (++info->n_memranges == SYSINFO_MAX_MEM_RANGES)
return;
}
ptr += (mmap->size + sizeof(mmap->size));
}
}
static void mb_parse_cmdline(struct multiboot_header *table)
{
extern int main_argc;
extern char *main_argv[];
char *c = phys_to_virt(table->cmdline);
while(*c != '\0' && main_argc < MAX_ARGC_COUNT) {
main_argv[main_argc++] = c;
for( ; *c != '\0' && !isspace(*c); c++);
if (*c) {
*c = 0;
c++;
}
}
}
int get_multiboot_info(struct sysinfo_t *info)
{
struct multiboot_header *table;
if (loader_eax != MULTIBOOT_MAGIC)
return -1;
table = (struct multiboot_header *) phys_to_virt(loader_ebx);
info->mbtable = phys_to_virt(loader_ebx);
if (table->flags & MULTIBOOT_FLAGS_MMAP)
mb_parse_mmap(table, info);
if (table->flags & MULTIBOOT_FLAGS_CMDLINE)
mb_parse_cmdline(table);
return 0;
}