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/*
* support for Multiboot payloads
*
* Copyright (C) 2008 Robert Millan
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*
*/
#include <cpu/x86/multiboot.h>
#include <string.h>
#include <device/resource.h>
#include <console/console.h>
#include <boot/coreboot_tables.h>
struct multiboot_info *mbi = NULL;
unsigned long write_multiboot_info(unsigned long rom_table_end)
{
static struct multiboot_mmap_entry *mb_mem;
struct lb_memory* coreboot_table;
int entries;
int i;
mbi = (struct multiboot_info *)rom_table_end;
memset(mbi, 0, sizeof(*mbi));
rom_table_end += sizeof(*mbi);
mbi->mmap_addr = (u32) rom_table_end;
mb_mem = (struct multiboot_mmap_entry *)rom_table_end;
/* copy regions from coreboot tables */
coreboot_table = get_lb_mem();
entries = (coreboot_table->size - sizeof(*coreboot_table))/sizeof(coreboot_table->map[0]);
if (coreboot_table == NULL || entries < 1) {
printk(BIOS_INFO, "%s: Cannot find coreboot table.\n", __func__);
return (unsigned long) mb_mem;
}
for (i = 0; i < entries; i++) {
uint64_t entry_start = unpack_lb64(coreboot_table->map[i].start);
uint64_t entry_size = unpack_lb64(coreboot_table->map[i].size);
mb_mem->addr = entry_start;
mb_mem->len = entry_size;
switch (coreboot_table->map[i].type) {
case LB_MEM_RAM:
mb_mem->type = MULTIBOOT_MEMORY_AVAILABLE;
break;
default: // anything other than usable RAM
mb_mem->type = MULTIBOOT_MEMORY_RESERVED;
break;
}
mb_mem->size = sizeof(*mb_mem) - sizeof(mb_mem->size);
mb_mem++;
}
mbi->mmap_length = ((u32) mb_mem) - mbi->mmap_addr;
mbi->flags |= MB_INFO_MEM_MAP;
printk(BIOS_INFO, "Multiboot Information structure has been written.\n");
return (unsigned long)mb_mem;
}
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