cmd_bootm.c

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/*
 * (C) Copyright 2000-2006
 * Wolfgang Denk, DENX Software Engineering, [e-mail].
 *
 * 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
 */


/*
 * Boot support
 */
#include <common.h>
#include <watchdog.h>
#include <command.h>
#include <image.h>
#include <malloc.h>
#include <zlib.h>
#include <bzlib.h>
#include <environment.h>
#include <lmb.h>
#include <asm/byteorder.h>

#if defined(CONFIG_CMD_USB)
#include <usb.h>
#endif

#ifdef CFG_HUSH_PARSER
#include <hush.h>
#endif

DECLARE_GLOBAL_DATA_PTR;

extern int gunzip (void *dst, int dstlen, unsigned char *src, unsigned long *lenp);
#ifndef CFG_BOOTM_LEN
#define CFG_BOOTM_LEN	0x800000	/* use 8MByte as default max gunzip size */
#endif

#ifdef CONFIG_BZIP2
extern void bz_internal_error(int);
#endif

#if defined(CONFIG_CMD_IMI)
static int image_info (unsigned long addr);
#endif

#if defined(CONFIG_CMD_IMLS)
#include <flash.h>
extern flash_info_t flash_info[]; /* info for FLASH chips */
static int do_imls (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
#endif

#ifdef CONFIG_SILENT_CONSOLE
static void fixup_silent_linux (void);
#endif

static image_header_t *image_get_kernel (ulong img_addr, int verify);
#if defined(CONFIG_FIT)
static int fit_check_kernel (const void *fit, int os_noffset, int verify);
#endif

static void *boot_get_kernel (cmd_tbl_t *cmdtp, int flag,int argc, char *argv[],
		bootm_headers_t *images, ulong *os_data, ulong *os_len);
extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);

/*
 *  Continue booting an OS image; caller already has:
 *  - copied image header to global variable `header'
 *  - checked header magic number, checksums (both header & image),
 *  - verified image architecture (PPC) and type (KERNEL or MULTI),
 *  - loaded (first part of) image to header load address,
 *  - disabled interrupts.
 */
typedef void boot_os_fn (cmd_tbl_t *cmdtp, int flag,
			int argc, char *argv[],
			bootm_headers_t *images); /* pointers to os/initrd/fdt */

extern boot_os_fn do_bootm_linux;
static boot_os_fn do_bootm_netbsd;
#if defined(CONFIG_LYNXKDI)
static boot_os_fn do_bootm_lynxkdi;
extern void lynxkdi_boot (image_header_t *);
#endif
static boot_os_fn do_bootm_rtems;
#if defined(CONFIG_CMD_ELF)
static boot_os_fn do_bootm_vxworks;
static boot_os_fn do_bootm_qnxelf;
int do_bootvx (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
int do_bootelf (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
#endif
#if defined(CONFIG_ARTOS) && defined(CONFIG_PPC)
static boot_os_fn do_bootm_artos;
#endif

ulong load_addr = CFG_LOAD_ADDR;	/* Default Load Address */
static bootm_headers_t images;		/* pointers to os/initrd/fdt images */

void __board_lmb_reserve(struct lmb *lmb)
{
	/* please define platform specific board_lmb_reserve() */
}
void board_lmb_reserve(struct lmb *lmb) __attribute__((weak, alias("__board_lmb_reserve")));


/*******************************************************************/
/* bootm - boot application image from image in memory */
/*******************************************************************/
int do_bootm (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
	ulong		iflag;
	const char	*type_name;
	uint		unc_len = CFG_BOOTM_LEN;
	uint8_t		comp, type, os;

	void		*os_hdr;
	ulong		os_data, os_len;
	ulong		image_start, image_end;
	ulong		load_start, load_end;
	ulong		mem_start;
	phys_size_t	mem_size;

	struct lmb lmb;

	memset ((void *)&images, 0, sizeof (images));
	images.verify = getenv_yesno ("verify");
	images.lmb = &lmb;

	lmb_init(&lmb);

	mem_start = getenv_bootm_low();
	mem_size = getenv_bootm_size();

	lmb_add(&lmb, (phys_addr_t)mem_start, mem_size);

	board_lmb_reserve(&lmb);

	/* get kernel image header, start address and length */
	os_hdr = boot_get_kernel (cmdtp, flag, argc, argv,
			&images, &os_data, &os_len);
	if (os_len == 0) {
		puts ("ERROR: can't get kernel image!\n");
		return 1;
	}

	/* get image parameters */
	switch (genimg_get_format (os_hdr)) {
	case IMAGE_FORMAT_LEGACY:
		type = image_get_type (os_hdr);
		comp = image_get_comp (os_hdr);
		os = image_get_os (os_hdr);

		image_end = image_get_image_end (os_hdr);
		load_start = image_get_load (os_hdr);
		break;
#if defined(CONFIG_FIT)
	case IMAGE_FORMAT_FIT:
		if (fit_image_get_type (images.fit_hdr_os,
					images.fit_noffset_os, &type)) {
			puts ("Can't get image type!\n");
			show_boot_progress (-109);
			return 1;
		}

		if (fit_image_get_comp (images.fit_hdr_os,
					images.fit_noffset_os, &comp)) {
			puts ("Can't get image compression!\n");
			show_boot_progress (-110);
			return 1;
		}

		if (fit_image_get_os (images.fit_hdr_os,
					images.fit_noffset_os, &os)) {
			puts ("Can't get image OS!\n");
			show_boot_progress (-111);
			return 1;
		}

		image_end = fit_get_end (images.fit_hdr_os);

		if (fit_image_get_load (images.fit_hdr_os, images.fit_noffset_os,
					&load_start)) {
			puts ("Can't get image load address!\n");
			show_boot_progress (-112);
			return 1;
		}
		break;
#endif
	default:
		puts ("ERROR: unknown image format type!\n");
		return 1;
	}

	image_start = (ulong)os_hdr;
	load_end = 0;
	type_name = genimg_get_type_name (type);

	/*
	 * We have reached the point of no return: we are going to
	 * overwrite all exception vector code, so we cannot easily
	 * recover from any failures any more...
	 */
	iflag = disable_interrupts();

#if defined(CONFIG_CMD_USB)
	/*
	 * turn off USB to prevent the host controller from writing to the
	 * SDRAM while Linux is booting. This could happen (at least for OHCI
	 * controller), because the HCCA (Host Controller Communication Area)
	 * lies within the SDRAM and the host controller writes continously to
	 * this area (as busmaster!). The HccaFrameNumber is for example
	 * updated every 1 ms within the HCCA structure in SDRAM! For more
	 * details see the OpenHCI specification.
	 */
	usb_stop();
#endif


#ifdef CONFIG_AMIGAONEG3SE
	/*
	 * We've possible left the caches enabled during
	 * bios emulation, so turn them off again
	 */
	icache_disable();
	invalidate_l1_instruction_cache();
	flush_data_cache();
	dcache_disable();
#endif

	switch (comp) {
	case IH_COMP_NONE:
		if (load_start == (ulong)os_hdr) {
			printf ("   XIP %s ... ", type_name);
		} else {
			printf ("   Loading %s ... ", type_name);

			memmove_wd ((void *)load_start,
				   (void *)os_data, os_len, CHUNKSZ);
		}
		load_end = load_start + os_len;
		puts("OK\n");
		break;
	case IH_COMP_GZIP:
		printf ("   Uncompressing %s ... ", type_name);
		if (gunzip ((void *)load_start, unc_len,
					(uchar *)os_data, &os_len) != 0) {
			puts ("GUNZIP: uncompress or overwrite error "
				"- must RESET board to recover\n");
			show_boot_progress (-6);
			do_reset (cmdtp, flag, argc, argv);
		}

		load_end = load_start + os_len;
		break;
#ifdef CONFIG_BZIP2
	case IH_COMP_BZIP2:
		printf ("   Uncompressing %s ... ", type_name);
		/*
		 * If we've got less than 4 MB of malloc() space,
		 * use slower decompression algorithm which requires
		 * at most 2300 KB of memory.
		 */
		int i = BZ2_bzBuffToBuffDecompress ((char*)load_start,
					&unc_len, (char *)os_data, os_len,
					CFG_MALLOC_LEN < (4096 * 1024), 0);
		if (i != BZ_OK) {
			printf ("BUNZIP2: uncompress or overwrite error %d "
				"- must RESET board to recover\n", i);
			show_boot_progress (-6);
			do_reset (cmdtp, flag, argc, argv);
		}

		load_end = load_start + unc_len;
		break;
#endif /* CONFIG_BZIP2 */
	default:
		if (iflag)
			enable_interrupts();
		printf ("Unimplemented compression type %d\n", comp);
		show_boot_progress (-7);
		return 1;
	}
	puts ("OK\n");
	debug ("   kernel loaded at 0x%08lx, end = 0x%08lx\n", load_start, load_end);
	show_boot_progress (7);

	if ((load_start < image_end) && (load_end > image_start)) {
		debug ("image_start = 0x%lX, image_end = 0x%lx\n", image_start, image_end);
		debug ("load_start = 0x%lx, load_end = 0x%lx\n", load_start, load_end);

		if (images.legacy_hdr_valid) {
			if (image_get_type (&images.legacy_hdr_os_copy) == IH_TYPE_MULTI)
				puts ("WARNING: legacy format multi component "
					"image overwritten\n");
		} else {
			puts ("ERROR: new format image overwritten - "
				"must RESET the board to recover\n");
			show_boot_progress (-113);
			do_reset (cmdtp, flag, argc, argv);
		}
	}

	show_boot_progress (8);

	lmb_reserve(&lmb, load_start, (load_end - load_start));

	switch (os) {
	default:			/* handled by (original) Linux case */
	case IH_OS_LINUX:
#ifdef CONFIG_SILENT_CONSOLE
	    fixup_silent_linux();
#endif
	    do_bootm_linux (cmdtp, flag, argc, argv, &images);
	    break;

	case IH_OS_NETBSD:
	    do_bootm_netbsd (cmdtp, flag, argc, argv, &images);
	    break;

#ifdef CONFIG_LYNXKDI
	case IH_OS_LYNXOS:
	    do_bootm_lynxkdi (cmdtp, flag, argc, argv, &images);
	    break;
#endif

	case IH_OS_RTEMS:
	    do_bootm_rtems (cmdtp, flag, argc, argv, &images);
	    break;

#if defined(CONFIG_CMD_ELF)
	case IH_OS_VXWORKS:
	    do_bootm_vxworks (cmdtp, flag, argc, argv, &images);
	    break;

	case IH_OS_QNX:
	    do_bootm_qnxelf (cmdtp, flag, argc, argv, &images);
	    break;
#endif

#ifdef CONFIG_ARTOS
	case IH_OS_ARTOS:
	    do_bootm_artos (cmdtp, flag, argc, argv, &images);
	    break;
#endif
	}

	show_boot_progress (-9);
#ifdef DEBUG
	puts ("\n## Control returned to monitor - resetting...\n");
	do_reset (cmdtp, flag, argc, argv);
#endif
	if (iflag)
		enable_interrupts();

	return 1;
}

/**
 * image_get_kernel - verify legacy format kernel image
 * @img_addr: in RAM address of the legacy format image to be verified
 * @verify: data CRC verification flag
 *
 * image_get_kernel() verifies legacy image integrity and returns pointer to
 * legacy image header if image verification was completed successfully.
 *
 * returns:
 *     pointer to a legacy image header if valid image was found
 *     otherwise return NULL
 */
static image_header_t *image_get_kernel (ulong img_addr, int verify)
{
	image_header_t *hdr = (image_header_t *)img_addr;

	if (!image_check_magic(hdr)) {
		puts ("Bad Magic Number\n");
		show_boot_progress (-1);
		return NULL;
	}
	show_boot_progress (2);

	if (!image_check_hcrc (hdr)) {
		puts ("Bad Header Checksum\n");
		show_boot_progress (-2);
		return NULL;
	}

	show_boot_progress (3);
	image_print_contents (hdr);

	if (verify) {
		puts ("   Verifying Checksum ... ");
		if (!image_check_dcrc (hdr)) {
			printf ("Bad Data CRC\n");
			show_boot_progress (-3);
			return NULL;
		}
		puts ("OK\n");
	}
	show_boot_progress (4);

	if (!image_check_target_arch (hdr)) {
		printf ("Unsupported Architecture 0x%x\n", image_get_arch (hdr));
		show_boot_progress (-4);
		return NULL;
	}
	return hdr;
}

/**
 * fit_check_kernel - verify FIT format kernel subimage
 * @fit_hdr: pointer to the FIT image header
 * os_noffset: kernel subimage node offset within FIT image
 * @verify: data CRC verification flag
 *
 * fit_check_kernel() verifies integrity of the kernel subimage and from
 * specified FIT image.
 *
 * returns:
 *     1, on success
 *     0, on failure
 */
#if defined (CONFIG_FIT)
static int fit_check_kernel (const void *fit, int os_noffset, int verify)
{
	fit_image_print (fit, os_noffset, "   ");

	if (verify) {
		puts ("   Verifying Hash Integrity ... ");
		if (!fit_image_check_hashes (fit, os_noffset)) {
			puts ("Bad Data Hash\n");
			show_boot_progress (-104);
			return 0;
		}
		puts ("OK\n");
	}
	show_boot_progress (105);

	if (!fit_image_check_target_arch (fit, os_noffset)) {
		puts ("Unsupported Architecture\n");
		show_boot_progress (-105);
		return 0;
	}

	show_boot_progress (106);
	if (!fit_image_check_type (fit, os_noffset, IH_TYPE_KERNEL)) {
		puts ("Not a kernel image\n");
		show_boot_progress (-106);
		return 0;
	}

	show_boot_progress (107);
	return 1;
}
#endif /* CONFIG_FIT */

/**
 * boot_get_kernel - find kernel image
 * @os_data: pointer to a ulong variable, will hold os data start address
 * @os_len: pointer to a ulong variable, will hold os data length
 *
 * boot_get_kernel() tries to find a kernel image, verifies its integrity
 * and locates kernel data.
 *
 * returns:
 *     pointer to image header if valid image was found, plus kernel start
 *     address and length, otherwise NULL
 */
static void *boot_get_kernel (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
		bootm_headers_t *images, ulong *os_data, ulong *os_len)
{
	image_header_t	*hdr;
	ulong		img_addr;
#if defined(CONFIG_FIT)
	void		*fit_hdr;
	const char	*fit_uname_config = NULL;
	const char	*fit_uname_kernel = NULL;
	const void	*data;
	size_t		len;
	int		cfg_noffset;
	int		os_noffset;
#endif

	/* find out kernel image address */
	if (argc < 2) {
		img_addr = load_addr;
		debug ("*  kernel: default image load address = 0x%08lx\n",
				load_addr);
#if defined(CONFIG_FIT)
	} else if (fit_parse_conf (argv[1], load_addr, &img_addr,
							&fit_uname_config)) {
		debug ("*  kernel: config '%s' from image at 0x%08lx\n",
				fit_uname_config, img_addr);
	} else if (fit_parse_subimage (argv[1], load_addr, &img_addr,
							&fit_uname_kernel)) {
		debug ("*  kernel: subimage '%s' from image at 0x%08lx\n",
				fit_uname_kernel, img_addr);
#endif
	} else {
		img_addr = simple_strtoul(argv[1], NULL, 16);
		debug ("*  kernel: cmdline image address = 0x%08lx\n", img_addr);
	}

	show_boot_progress (1);

	/* copy from dataflash if needed */
	img_addr = genimg_get_image (img_addr);

	/* check image type, for FIT images get FIT kernel node */
	*os_data = *os_len = 0;
	switch (genimg_get_format ((void *)img_addr)) {
	case IMAGE_FORMAT_LEGACY:
		printf ("## Booting kernel from Legacy Image at %08lx ...\n",
				img_addr);
		hdr = image_get_kernel (img_addr, images->verify);
		if (!hdr)
			return NULL;
		show_boot_progress (5);

		/* get os_data and os_len */
		switch (image_get_type (hdr)) {
		case IH_TYPE_KERNEL:
			*os_data = image_get_data (hdr);
			*os_len = image_get_data_size (hdr);
			break;
		case IH_TYPE_MULTI:
			image_multi_getimg (hdr, 0, os_data, os_len);
			break;
		default:
			printf ("Wrong Image Type for %s command\n", cmdtp->name);
			show_boot_progress (-5);
			return NULL;
		}

		/*
		 * copy image header to allow for image overwrites during kernel
		 * decompression.
		 */
		memmove (&images->legacy_hdr_os_copy, hdr, sizeof(image_header_t));

		/* save pointer to image header */
		images->legacy_hdr_os = hdr;

		images->legacy_hdr_valid = 1;
		show_boot_progress (6);
		break;
#if defined(CONFIG_FIT)
	case IMAGE_FORMAT_FIT:
		fit_hdr = (void *)img_addr;
		printf ("## Booting kernel from FIT Image at %08lx ...\n",
				img_addr);

		if (!fit_check_format (fit_hdr)) {
			puts ("Bad FIT kernel image format!\n");
			show_boot_progress (-100);
			return NULL;
		}
		show_boot_progress (100);