8677a23d5b
src/arch/x86. Signed-off-by: Stefan Reinauer <stepan@coreboot.org> Acked-by: Patrick Georgi <patrick@georgi-clan.de> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@6161 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
77 lines
2.3 KiB
C
77 lines
2.3 KiB
C
/*
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* support for Multiboot payloads
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*
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* Copyright (C) 2008 Robert Millan
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include <cpu/x86/multiboot.h>
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#include <string.h>
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#include <device/resource.h>
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#include <console/console.h>
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#include <boot/coreboot_tables.h>
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#include <arch/coreboot_tables.h>
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struct multiboot_info *mbi = NULL;
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unsigned long write_multiboot_info(unsigned long rom_table_end)
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{
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static struct multiboot_mmap_entry *mb_mem;
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struct lb_memory* coreboot_table;
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int entries;
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int i;
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mbi = (struct multiboot_info *)rom_table_end;
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memset(mbi, 0, sizeof(*mbi));
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rom_table_end += sizeof(*mbi);
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mbi->mmap_addr = (u32) rom_table_end;
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mb_mem = (struct multiboot_mmap_entry *)rom_table_end;
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/* copy regions from coreboot tables */
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coreboot_table = get_lb_mem();
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entries = (coreboot_table->size - sizeof(*coreboot_table))/sizeof(coreboot_table->map[0]);
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if (coreboot_table == NULL || entries < 1) {
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printk(BIOS_INFO, "%s: Cannot find coreboot table.\n", __func__);
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return (unsigned long) mb_mem;
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}
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for (i = 0; i < entries; i++) {
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uint64_t entry_start = unpack_lb64(coreboot_table->map[i].start);
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uint64_t entry_size = unpack_lb64(coreboot_table->map[i].size);
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mb_mem->addr = entry_start;
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mb_mem->len = entry_size;
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switch (coreboot_table->map[i].type) {
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case LB_MEM_RAM:
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mb_mem->type = MULTIBOOT_MEMORY_AVAILABLE;
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break;
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default: // anything other than usable RAM
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mb_mem->type = MULTIBOOT_MEMORY_RESERVED;
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break;
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}
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mb_mem->size = sizeof(*mb_mem) - sizeof(mb_mem->size);
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mb_mem++;
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}
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mbi->mmap_length = ((u32) mb_mem) - mbi->mmap_addr;
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mbi->flags |= MB_INFO_MEM_MAP;
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printk(BIOS_INFO, "Multiboot Information structure has been written.\n");
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return (unsigned long)mb_mem;
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}
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