u-boot/arch/x86/lib/bootm.c

/*
 * (C) Copyright 2002
 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
 * Marius Groeger <mgroeger@sysgo.de>
 *
 * Copyright (C) 2001  Erik Mouw (J.A.K.Mouw@its.tudelft.nl)
 *
 * 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 <common.h>
#include <command.h>
#include <image.h>
#include <u-boot/zlib.h>
#include <asm/byteorder.h>
#include <asm/zimage.h>

/*cmd_boot.c*/
int do_bootm_linux(int flag, int argc, char * const argv[], bootm_headers_t *images)
{
	void		*base_ptr;
	ulong		os_data, os_len;
	image_header_t	*hdr;

#if defined(CONFIG_FIT)
	const void	*data;
	size_t		len;
#endif

	if ((flag != 0) && (flag != BOOTM_STATE_OS_GO))
		return 1;

	if (images->legacy_hdr_valid) {
		hdr = images->legacy_hdr_os;
		if (image_check_type (hdr, IH_TYPE_MULTI)) {
			/* if multi-part image, we need to get first subimage */
			image_multi_getimg (hdr, 0, &os_data, &os_len);
		} else {
			/* otherwise get image data */
			os_data = image_get_data (hdr);
			os_len = image_get_data_size (hdr);
		}
#if defined(CONFIG_FIT)
	} else if (images->fit_uname_os) {
		ret = fit_image_get_data (images->fit_hdr_os,
					images->fit_noffset_os, &data, &len);
		if (ret) {
			puts ("Can't get image data/size!\n");
			goto error;
		}
		os_data = (ulong)data;
		os_len = (ulong)len;
#endif
	} else {
		puts ("Could not find kernel image!\n");
		goto error;
	}

	base_ptr = load_zimage ((void*)os_data, os_len,
			images->rd_start, images->rd_end - images->rd_start, 0);

	if (NULL == base_ptr) {
		printf ("## Kernel loading failed ...\n");
		goto error;

	}

#ifdef DEBUG
	printf ("## Transferring control to Linux (at address %08x) ...\n",
		(u32)base_ptr);
#endif

	/* we assume that the kernel is in place */
	printf("\nStarting kernel ...\n\n");

	boot_zimage(base_ptr);
	/* does not return */

error:
	return 1;
}