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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2003-2004 Eric Biederman
* Copyright (C) 2005-2010 coresystems GmbH
* Copyright (C) 2014 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.
*/
#include <console/console.h>
#include <bootmem.h>
#include <cbmem.h>
#include <device/resource.h>
#include <stdlib.h>
#include <commonlib/region.h>
#include <fit.h>
#include <program_loading.h>
#include <timestamp.h>
#include <cbfs.h>
#include <string.h>
#include <commonlib/compression.h>
#include <lib.h>
#include <fit_payload.h>
/* Pack the device_tree and place it at given position. */
static void pack_fdt(struct region *fdt, struct device_tree *dt)
{
printk(BIOS_INFO, "FIT: Flattening FDT to %p\n",
(void *)fdt->offset);
dt_flatten(dt, (void *)fdt->offset);
prog_segment_loaded(fdt->offset, fdt->size, 0);
}
/**
* Extract a node to given regions.
* Returns true on error, false on success.
*/
static bool extract(struct region *region, struct fit_image_node *node)
{
void *dst = (void *)region->offset;
const char *comp_name;
size_t true_size = 0;
switch (node->compression) {
case CBFS_COMPRESS_NONE:
comp_name = "Relocating uncompressed";
break;
case CBFS_COMPRESS_LZMA:
comp_name = "Decompressing LZMA";
break;
case CBFS_COMPRESS_LZ4:
comp_name = "Decompressing LZ4";
break;
default:
printk(BIOS_ERR, "ERROR: Unsupported compression\n");
return true;
}
printk(BIOS_INFO, "FIT: %s %s to %p\n", comp_name, node->name, dst);
switch (node->compression) {
case CBFS_COMPRESS_NONE:
memcpy(dst, node->data, node->size);
true_size = node->size;
break;
case CBFS_COMPRESS_LZMA:
timestamp_add_now(TS_START_ULZMA);
true_size = ulzman(node->data, node->size, dst, region->size);
timestamp_add_now(TS_END_ULZMA);
break;
case CBFS_COMPRESS_LZ4:
timestamp_add_now(TS_START_ULZ4F);
true_size = ulz4fn(node->data, node->size, dst, region->size);
timestamp_add_now(TS_END_ULZ4F);
break;
default:
return true;
}
if (!true_size) {
printk(BIOS_ERR, "ERROR: %s node failed!\n", comp_name);
return true;
}
prog_segment_loaded(region->offset, true_size, 0);
return false;
}
/*
* Parse the uImage FIT, choose a configuration and extract images.
*/
void fit_payload(struct prog *payload)
{
struct device_tree *dt = NULL;
struct region kernel = {0}, fdt = {0}, initrd = {0};
void *data;
data = rdev_mmap_full(prog_rdev(payload));
if (data == NULL)
return;
printk(BIOS_INFO, "FIT: Examine payload %s\n", payload->name);
struct fit_config_node *config = fit_load(data);
if (!config || !config->kernel_node) {
printk(BIOS_ERR, "ERROR: Could not load FIT\n");
rdev_munmap(prog_rdev(payload), data);
return;
}
if (config->fdt_node) {
dt = fdt_unflatten(config->fdt_node->data);
if (!dt) {
printk(BIOS_ERR,
"ERROR: Failed to unflatten the FDT.\n");
rdev_munmap(prog_rdev(payload), data);
return;
}
dt_apply_fixups(dt);
/* Update device_tree */
#if defined(CONFIG_LINUX_COMMAND_LINE)
fit_update_chosen(dt, (char *)CONFIG_LINUX_COMMAND_LINE);
#endif
fit_update_memory(dt);
}
/* Collect infos for fit_payload_arch */
kernel.size = config->kernel_node->size;
fdt.size = dt ? dt_flat_size(dt) : 0;
initrd.size = config->ramdisk_node ? config->ramdisk_node->size : 0;
/* Invoke arch specific payload placement and fixups */
if (!fit_payload_arch(payload, config, &kernel, &fdt, &initrd)) {
printk(BIOS_ERR, "ERROR: Failed to find free memory region\n");
bootmem_dump_ranges();
rdev_munmap(prog_rdev(payload), data);
return;
}
/* Load the images to given position */
if (config->fdt_node) {
/* Update device_tree */
if (config->ramdisk_node)
fit_add_ramdisk(dt, (void *)initrd.offset, initrd.size);
pack_fdt(&fdt, dt);
}
if (config->ramdisk_node &&
extract(&initrd, config->ramdisk_node)) {
printk(BIOS_ERR, "ERROR: Failed to extract initrd\n");
rdev_munmap(prog_rdev(payload), data);
return;
}
timestamp_add_now(TS_KERNEL_DECOMPRESSION);
if (extract(&kernel, config->kernel_node)) {
printk(BIOS_ERR, "ERROR: Failed to extract kernel\n");
rdev_munmap(prog_rdev(payload), data);
return;
}
timestamp_add_now(TS_START_KERNEL);
rdev_munmap(prog_rdev(payload), data);
}
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