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/*
*
* 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>
unsigned long loader_eax; /* The value of EAX passed from the loader */
unsigned long loader_ebx; /* The value of EBX passed from the loader */
static int mb_add_memrange(struct sysinfo_t *info, unsigned long long base,
unsigned long long size, unsigned int type)
{
if (info->n_memranges >= SYSINFO_MAX_MEM_RANGES)
return -1;
#if CONFIG(LP_MEMMAP_RAM_ONLY)
/* 1 == normal RAM. Ignore everything else for now */
if (type != 1)
return 0;
#endif
info->memrange[info->n_memranges].base = base;
info->memrange[info->n_memranges].size = size;
info->memrange[info->n_memranges].type = type;
info->n_memranges++;
return 0;
}
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;
if (mb_add_memrange(info, mmap->addr, mmap->length, mmap->type))
return;
ptr += (mmap->size + sizeof(mmap->size));
}
}
static void mb_parse_meminfo(struct multiboot_header *table,
struct sysinfo_t *info)
{
unsigned long long mem_low = table->mem_lower;
unsigned long long mem_high = table->mem_higher;
info->n_memranges = 0;
if (mem_low)
mb_add_memrange(info, 0 * MiB, mem_low * KiB, 1);
if (mem_high)
mb_add_memrange(info, 1 * MiB, mem_high * KiB, 1);
}
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);
else if (table->flags & MULTIBOOT_FLAGS_MEMINFO)
mb_parse_meminfo(table, info);
if (table->flags & MULTIBOOT_FLAGS_CMDLINE)
mb_parse_cmdline(table);
return 0;
}
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