uboot-vybrid_public/lib_microblaze/bootm.c

/*
 * (C) Copyright 2007 Michal Simek
 * (C) Copyright 2004 Atmark Techno, Inc.
 *
 * Michal  SIMEK <monstr@monstr.eu>
 * Yasushi SHOJI <yashi@atmark-techno.com>
 *
 * 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 <zlib.h>
#include <asm/byteorder.h>

DECLARE_GLOBAL_DATA_PTR;

extern int do_reset (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]);

void do_bootm_linux (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[],
		     image_header_t *hdr, int verify)
{
	int i;
	ulong checksum;

	ulong rd_data, rd_len;
	ulong initrd_start, initrd_end;
	image_header_t *rd_hdr;

	/* First parameter is mapped to $r5 for kernel boot args */
	void (*theKernel) (char *);
	char *commandline = getenv ("bootargs");

	theKernel = (void (*)(char *))image_get_ep (hdr);

	/* Check if there is an initrd image */
	if (argc >= 3) {
		show_boot_progress (9);

		rd_hdr = (image_header_t *)simple_strtoul (argv[2], NULL, 16);
		printf ("## Loading Ramdisk Image at %08lx ...\n", rd_hdr);

		if (!image_check_magic (rd_hdr)) {
			printf ("Bad Magic Number\n");
			show_boot_progress (-10);
			do_reset (cmdtp, flag, argc, argv);
		}

		if (!image_check_magic (rd_hdr)) {
			printf ("Bad Header Checksum\n");
			show_boot_progress (-11);
			do_reset (cmdtp, flag, argc, argv);
		}

		show_boot_progress (10);
		print_image_hdr (rd_hdr);

		rd_data = image_get_data (rd_hdr);
		rd_en = image_get_data_size (rd_hdr);

		if (verify) {
			printf ("   Verifying Checksum ... ");
			if (!image_check_dcrc (rd_hdr)) {
				printf ("Bad Data CRC\n");
				show_boot_progress (-12);
				do_reset (cmdtp, flag, argc, argv);
			}
			printf ("OK\n");
		}

		show_boot_progress (11);

		if (!image_check_os (rd_hdr, IH_OS_LINUX) ||
		    !image_check_arch (rd_hdr, IH_ARCH_MICROBLAZE) ||
		    !image_check_type (rd_hdr, IH_TYPE_RAMDISK)) {
			printf ("No Linux Microblaze Ramdisk Image\n");
			show_boot_progress (-13);
			do_reset (cmdtp, flag, argc, argv);
		}

		/*
		 * Now check if we have a multifile image
		 */
	} else if (image_check_type (hdr, IH_TYPE_MULTI)) {
		/*
		 * Get second entry data start address and len
		 */
		show_boot_progress (13);
		image_multi_getimg (hdr, 1, &rd_data, &rd_len);
	} else {
		/*
		 * no initrd image
		 */
		show_boot_progress (14);

		rd_data = rd_len = 0;
	}

#ifdef  DEBUG
	if (!rd_data) {
		printf ("No initrd\n");
	}
#endif

	if (rd_data) {
		initrd_start = rd_data;
		initrd_end = initrd_start + rd_len;
	} else {
		initrd_start = 0;
		initrd_end = 0;
	}

	show_boot_progress (15);

#ifdef DEBUG
	printf ("## Transferring control to Linux (at address %08lx) ...\n",
		(ulong) theKernel);
#endif

	theKernel (commandline);
}