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/*
* 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
* 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, write to the Free Software
* Foundation, Inc.
*/
#include <boot_device.h>
#include <cbfs.h>
#include <string.h>
#ifdef LIBPAYLOAD
# define printk(x...)
# define init_default_cbfs_media libpayload_init_default_cbfs_media
extern int libpayload_init_default_cbfs_media(struct cbfs_media *media);
#else
# include <console/console.h>
#endif
// Implementation of memory-mapped ROM media source on X86.
static int x86_rom_open(struct cbfs_media *media) {
return 0;
}
static void *x86_rom_map(struct cbfs_media *media, size_t offset, size_t count) {
void *ptr;
const struct region_device *boot_dev;
boot_dev = media->context;
/* Extremely large offsets are considered relative to end of region. */
if ((uint32_t)offset > (uint32_t)0xf0000000)
offset += region_device_sz(boot_dev);
ptr = rdev_mmap(boot_dev, offset, count);
if (ptr == NULL)
return (void *)-1;
return ptr;
}
static void *x86_rom_unmap(struct cbfs_media *media, const void *address) {
return NULL;
}
static size_t x86_rom_read(struct cbfs_media *media, void *dest, size_t offset,
size_t count) {
void *ptr;
ptr = x86_rom_map(media, offset, count);
if (ptr == (void *)-1)
return 0;
memcpy(dest, ptr, count);
x86_rom_unmap(media, ptr);
return count;
}
static int x86_rom_close(struct cbfs_media *media) {
return 0;
}
static int init_x86rom_cbfs_media(struct cbfs_media *media) {
boot_device_init();
media->context = (void *)boot_device_ro();
if (media->context == NULL)
return -1;
media->open = x86_rom_open;
media->close = x86_rom_close;
media->map = x86_rom_map;
media->unmap = x86_rom_unmap;
media->read = x86_rom_read;
return 0;
}
int init_default_cbfs_media(struct cbfs_media *media) {
return init_x86rom_cbfs_media(media);
}
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