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/*
* This file is part of the coreboot project.
*
* Copyright 2015 Google Inc.
*
* 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 <console/console.h>
#include <string.h>
/* This assumes that the CBFS resides at 0x0, which is true for the default
* configuration. */
static const struct mem_region_device gboot_dev =
MEM_REGION_DEV_INIT(NULL, CONFIG_ROM_SIZE);
const struct region_device *boot_device_ro(void)
{
return &gboot_dev.rdev;
}
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) {
const struct region_device *boot_dev;
void *ptr;
printk(BIOS_INFO, "%s: media %p, offset %lx, size %ld.\n", __func__, media, offset, count);
boot_dev = media->context;
ptr = rdev_mmap(boot_dev, offset, count);
if (ptr == NULL)
return (void *)-1;
return ptr;
}
static void *rom_media_unmap(struct cbfs_media *media, const void *address) {
const struct region_device *boot_dev;
boot_dev = media->context;
rdev_munmap(boot_dev, (void *)address);
return NULL;
}
static size_t rom_media_read(struct cbfs_media *media, void *dest, size_t offset,
size_t count) {
const struct region_device *boot_dev;
boot_dev = media->context;
if (rdev_readat(boot_dev, dest, offset, count) < 0)
return 0;
return count;
}
static int rom_media_close(struct cbfs_media *media) {
return 0;
}
static int init_rom_media_cbfs(struct cbfs_media *media) {
boot_device_init();
media->context = (void *)boot_device_ro();
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);
}
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