blob: 8e858cb9bc4ab09c23940c41dc4faf88104b8be5 [file] [log] [blame]
* This file is part of the coreboot project.
* Copyright (C) 2013 The Chromium OS Authors. All rights reserved.
* 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; version 2 of
* the License.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
* MA 02110-1301 USA
#include <cbfs.h>
#include <string.h>
# define printk(x...)
# define init_default_cbfs_media libpayload_init_default_cbfs_media
extern int libpayload_init_default_cbfs_media(struct cbfs_media *media);
# include <console/console.h>
// Implementation of memory-mapped ROM media source on X86.
static int rom_media_open(struct cbfs_media *media) {
return 0;
static void *rom_media_map(struct cbfs_media *media, size_t offset, size_t count) {
void *ptr;
printk(BIOS_INFO, "%s: media %p, offset %lx, size %ld.\n", __func__, media, offset, count);
ptr = (void*)offset;
return ptr;
static void *rom_media_unmap(struct cbfs_media *media, const void *address) {
return NULL;
static size_t rom_media_read(struct cbfs_media *media, void *dest, size_t offset,
size_t count) {
void *ptr = rom_media_map(media, offset, count);
memcpy(dest, ptr, count);
rom_media_unmap(media, ptr);
return count;
static int rom_media_close(struct cbfs_media *media) {
return 0;
static int init_rom_media_cbfs(struct cbfs_media *media) {
//extern unsigned long _cbfs_master_header;
// On X86, we always keep a reference of pointer to CBFS header in
// 0xfffffffc, and the pointer is still a memory-mapped address.
// Since the CBFS core always use ROM offset, we need to figure out
// header->romsize even before media is initialized.
struct cbfs_header *header = (struct cbfs_header*) CONFIG_CBFS_HEADER_ROM_OFFSET; //&_cbfs_master_header;
if (CBFS_HEADER_MAGIC != ntohl(header->magic)) {
printk(BIOS_ERR, "Invalid CBFS master header at %p\n", header);
printk(BIOS_ERR, "Expected %08lx and got %08lx\n", (unsigned long) CBFS_HEADER_MAGIC, (unsigned long) ntohl(header->magic));
return -1;
} else {
uint32_t romsize = ntohl(header->romsize);
media->context = (void*)(uintptr_t)romsize;
#if defined(CONFIG_ROM_SIZE)
if (CONFIG_ROM_SIZE != romsize)
printk(BIOS_INFO, "Warning: rom size unmatch (%d/%d)\n",
CONFIG_ROM_SIZE, romsize);
media->open = rom_media_open;
media->close = rom_media_close;
media->map = rom_media_map;
media->unmap = rom_media_unmap;
media->read = rom_media_read;
return 0;
int init_default_cbfs_media(struct cbfs_media *media) {
return init_rom_media_cbfs(media);