src/arch/arm/fit.c

/*
 * Copyright 2013 Google Inc.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * 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; either version 2 of
 * the License, or (at your option) any later version.
 *
 * 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., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <stdint.h>

#include "arch/arm/boot.h"
#include "base/cleanup.h"
#include "base/device_tree.h"
#include "base/xalloc.h"
#include "boot/boot.h"
#include "boot/fit.h"

int boot(void *image, char *cmd_line, void *params, void *loader)
{
	DeviceTree *tree;
	FitImageNode *kernel = fit_load(image, cmd_line, &tree);

	if (!kernel || !tree)
		return 1;

	if (dt_apply_fixups(tree))
		return 1;

	// Allocate a spot for the FDT in memory.
	void *fdt = (void *)(uintptr_t)CONFIG_KERNEL_FIT_FDT_ADDR;
	uint32_t size = dt_flat_size(tree);

	// Reserve the spot the device tree will go.
	DeviceTreeReserveMapEntry *entry = xzalloc(sizeof(*entry));
	entry->start = (uintptr_t)fdt;
	entry->size = size;
	list_insert_after(&entry->list_node, &tree->reserve_map);

	// Flatten it.
	dt_flatten(tree, fdt);

	cleanup_trigger(CleanupOnHandoff);

	return boot_arm_linux(fdt, kernel);
}