[new uImage] ppc: Add new uImage format support to FDT handling routines

[people/ms/u-boot.git] / common / cmd_bootm.c

/*
 * (C) Copyright 2000-2006
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * 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
 */

#define DEBUG

/*
 * 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>

#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)
extern uchar (*env_get_char)(int); /* Returns a character from the environment */
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, mem_size;
#if defined(CONFIG_FIT)
        int             os_noffset;
#endif

        struct lmb lmb;

        memset ((void *)&images, 0, sizeof (images));
        images.verify = getenv_verify();
        images.autostart = getenv_autostart();
        images.lmb = &lmb;

        lmb_init(&lmb);

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

        lmb_add(&lmb, 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;
        }

        show_boot_progress (6);

        /* 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:
                os_noffset = fit_image_get_node (images.fit_hdr_os,
                                images.fit_uname_os);
                if (os_noffset < 0) {
                        printf ("Can't get image node for '%s'!\n",
                                        images.fit_uname_os);
                        return 1;
                }

                if (fit_image_get_type (images.fit_hdr_os, os_noffset, &type)) {
                        puts ("Can't get image type!\n");
                        return 1;
                }

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

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

                image_end = fit_get_end (images.fit_hdr_os);

                if (fit_image_get_load (images.fit_hdr_os, os_noffset,
                                        &load_start)) {
                        puts ("Can't get image load address!\n");
                        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();

#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 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 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);

                puts ("ERROR: image overwritten - must RESET the board to recover.\n");
                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");
        if (images.autostart)
                do_reset (cmdtp, flag, argc, argv);
#endif
        if (!images.autostart && 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");
                        return 0;
                }
                puts ("OK\n");
        }

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

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

        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             conf_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;
                }
                images->legacy_hdr_os = hdr;
                images->legacy_hdr_valid = 1;

                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");
                        return NULL;
                }

                if (!fit_uname_kernel) {
                        /*
                         * no kernel image node unit name, try to get config
                         * node first. If config unit node name is NULL
                         * fit_conf_get_node() will try to find default config node
                         */
                        conf_noffset = fit_conf_get_node (fit_hdr, fit_uname_config);
                        if (conf_noffset < 0)
                                return NULL;

                        os_noffset = fit_conf_get_kernel_node (fit_hdr, conf_noffset);
                        fit_uname_kernel = fit_get_name (fit_hdr, os_noffset, NULL);
                } else {
                        /* get kernel component image node offset */
                        os_noffset = fit_image_get_node (fit_hdr, fit_uname_kernel);
                }
                if (os_noffset < 0)
                        return NULL;

                printf ("   Trying '%s' kernel subimage\n", fit_uname_kernel);

                if (!fit_check_kernel (fit_hdr, os_noffset, images->verify))
                        return NULL;

                /* get kernel image data address and length */
                if (fit_image_get_data (fit_hdr, os_noffset, &data, &len)) {
                        puts ("Could not find kernel subimage data!\n");
                        return NULL;
                }

                *os_len = len;
                *os_data = (ulong)data;
                images->fit_hdr_os = fit_hdr;
                images->fit_uname_os = fit_uname_kernel;
                break;
#endif
        default:
                printf ("Wrong Image Format for %s command\n", cmdtp->name);
                return NULL;
        }

        debug ("   kernel data at 0x%08lx, len = 0x%08lx (%d)\n",
                        *os_data, *os_len, *os_len);

        return (void *)img_addr;
}

U_BOOT_CMD(
        bootm,  CFG_MAXARGS,    1,      do_bootm,
        "bootm   - boot application image from memory\n",
        "[addr [arg ...]]\n    - boot application image stored in memory\n"
        "\tpassing arguments 'arg ...'; when booting a Linux kernel,\n"
        "\t'arg' can be the address of an initrd image\n"
#if defined(CONFIG_OF_LIBFDT)
        "\tWhen booting a Linux kernel which requires a flat device-tree\n"
        "\ta third argument is required which is the address of the\n"
        "\tdevice-tree blob. To boot that kernel without an initrd image,\n"
        "\tuse a '-' for the second argument. If you do not pass a third\n"
        "\ta bd_info struct will be passed instead\n"
#endif
#if defined(CONFIG_FIT)
        "\t\nFor the new multi component uImage format (FIT) addresses\n"
        "\tmust be extened to include component or configuration unit name:\n"
        "\taddr:<subimg_uname> - direct component image specification\n"
        "\taddr#<conf_uname>   - configuration specification\n"
        "\tUse iminfo command to get the list of existing component\n"
        "\timages and configurations.\n"
#endif
);

/*******************************************************************/
/* bootd - boot default image */
/*******************************************************************/
#if defined(CONFIG_CMD_BOOTD)
int do_bootd (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
        int rcode = 0;

#ifndef CFG_HUSH_PARSER
        if (run_command (getenv ("bootcmd"), flag) < 0)
                rcode = 1;
#else
        if (parse_string_outer (getenv ("bootcmd"),
                        FLAG_PARSE_SEMICOLON | FLAG_EXIT_FROM_LOOP) != 0)
                rcode = 1;
#endif
        return rcode;
}

U_BOOT_CMD(
        boot,   1,      1,      do_bootd,
        "boot    - boot default, i.e., run 'bootcmd'\n",
        NULL
);

/* keep old command name "bootd" for backward compatibility */
U_BOOT_CMD(
        bootd, 1,       1,      do_bootd,
        "bootd   - boot default, i.e., run 'bootcmd'\n",
        NULL
);

#endif


/*******************************************************************/
/* iminfo - print header info for a requested image */
/*******************************************************************/
#if defined(CONFIG_CMD_IMI)
int do_iminfo (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
        int     arg;
        ulong   addr;
        int     rcode = 0;

        if (argc < 2) {
                return image_info (load_addr);
        }

        for (arg = 1; arg < argc; ++arg) {
                addr = simple_strtoul (argv[arg], NULL, 16);
                if (image_info (addr) != 0)
                        rcode = 1;
        }
        return rcode;
}

static int image_info (ulong addr)
{
        void *hdr = (void *)addr;

        printf ("\n## Checking Image at %08lx ...\n", addr);

        switch (genimg_get_format (hdr)) {
        case IMAGE_FORMAT_LEGACY:
                puts ("   Legacy image found\n");
                if (!image_check_magic (hdr)) {
                        puts ("   Bad Magic Number\n");
                        return 1;
                }

                if (!image_check_hcrc (hdr)) {
                        puts ("   Bad Header Checksum\n");
                        return 1;
                }

                image_print_contents (hdr);

                puts ("   Verifying Checksum ... ");
                if (!image_check_dcrc (hdr)) {
                        puts ("   Bad Data CRC\n");
                        return 1;
                }
                puts ("OK\n");
                return 0;
#if defined(CONFIG_FIT)
        case IMAGE_FORMAT_FIT:
                puts ("   FIT image found\n");

                if (!fit_check_format (hdr)) {
                        puts ("Bad FIT image format!\n");
                        return 1;
                }

                fit_print_contents (hdr);
                return 0;
#endif
        default:
                puts ("Unknown image format!\n");
                break;
        }

        return 1;
}

U_BOOT_CMD(
        iminfo, CFG_MAXARGS,    1,      do_iminfo,
        "iminfo  - print header information for application image\n",
        "addr [addr ...]\n"
        "    - print header information for application image starting at\n"
        "      address 'addr' in memory; this includes verification of the\n"
        "      image contents (magic number, header and payload checksums)\n"
);
#endif


/*******************************************************************/
/* imls - list all images found in flash */
/*******************************************************************/
#if defined(CONFIG_CMD_IMLS)
int do_imls (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
        flash_info_t *info;
        int i, j;
        void *hdr;

        for (i = 0, info = &flash_info[0];
                i < CFG_MAX_FLASH_BANKS; ++i, ++info) {

                if (info->flash_id == FLASH_UNKNOWN)
                        goto next_bank;
                for (j = 0; j < info->sector_count; ++j) {

                        hdr = (void *)info->start[j];
                        if (!hdr)
                                goto next_sector;

                        switch (genimg_get_format (hdr)) {
                        case IMAGE_FORMAT_LEGACY:
                                if (!image_check_hcrc (hdr))
                                        goto next_sector;

                                printf ("Legacy Image at %08lX:\n", (ulong)hdr);
                                image_print_contents (hdr);

                                puts ("   Verifying Checksum ... ");
                                if (!image_check_dcrc (hdr)) {
                                        puts ("Bad Data CRC\n");
                                } else {
                                        puts ("OK\n");
                                }
                                break;
#if defined(CONFIG_FIT)
                        case IMAGE_FORMAT_FIT:
                                if (!fit_check_format (hdr))
                                        goto next_sector;

                                printf ("FIT Image at %08lX:\n", (ulong)hdr);
                                fit_print_contents (hdr);
                                break;
#endif
                        default:
                                goto next_sector;
                        }

next_sector:            ;
                }
next_bank:      ;
        }

        return (0);
}

U_BOOT_CMD(
        imls,   1,              1,      do_imls,
        "imls    - list all images found in flash\n",
        "\n"
        "    - Prints information about all images found at sector\n"
        "      boundaries in flash.\n"
);
#endif

/*******************************************************************/
/* helper routines */
/*******************************************************************/
#ifdef CONFIG_SILENT_CONSOLE
static void fixup_silent_linux ()
{
        char buf[256], *start, *end;
        char *cmdline = getenv ("bootargs");

        /* Only fix cmdline when requested */
        if (!(gd->flags & GD_FLG_SILENT))
                return;

        debug ("before silent fix-up: %s\n", cmdline);
        if (cmdline) {
                if ((start = strstr (cmdline, "console=")) != NULL) {
                        end = strchr (start, ' ');
                        strncpy (buf, cmdline, (start - cmdline + 8));
                        if (end)
                                strcpy (buf + (start - cmdline + 8), end);
                        else
                                buf[start - cmdline + 8] = '\0';
                } else {
                        strcpy (buf, cmdline);
                        strcat (buf, " console=");
                }
        } else {
                strcpy (buf, "console=");
        }

        setenv ("bootargs", buf);
        debug ("after silent fix-up: %s\n", buf);
}
#endif /* CONFIG_SILENT_CONSOLE */


/*******************************************************************/
/* OS booting routines */
/*******************************************************************/

static void do_bootm_netbsd (cmd_tbl_t *cmdtp, int flag,
                            int argc, char *argv[],
                            bootm_headers_t *images)
{
        void (*loader)(bd_t *, image_header_t *, char *, char *);
        image_header_t *os_hdr, *hdr;
        ulong kernel_data, kernel_len;
        char *consdev;
        char *cmdline;

#if defined(CONFIG_FIT)
        if (!images->legacy_hdr_valid) {
                fit_unsupported_reset ("NetBSD");
                do_reset (cmdtp, flag, argc, argv);
        }
#endif
        hdr = images->legacy_hdr_os;

        /*
         * Booting a (NetBSD) kernel image
         *
         * This process is pretty similar to a standalone application:
         * The (first part of an multi-) image must be a stage-2 loader,
         * which in turn is responsible for loading & invoking the actual
         * kernel.  The only differences are the parameters being passed:
         * besides the board info strucure, the loader expects a command
         * line, the name of the console device, and (optionally) the
         * address of the original image header.
         */
        os_hdr = NULL;
        if (image_check_type (hdr, IH_TYPE_MULTI)) {
                image_multi_getimg (hdr, 1, &kernel_data, &kernel_len);
                if (kernel_len)
                        os_hdr = hdr;
        }

        consdev = "";
#if   defined (CONFIG_8xx_CONS_SMC1)
        consdev = "smc1";
#elif defined (CONFIG_8xx_CONS_SMC2)
        consdev = "smc2";
#elif defined (CONFIG_8xx_CONS_SCC2)
        consdev = "scc2";
#elif defined (CONFIG_8xx_CONS_SCC3)
        consdev = "scc3";
#endif

        if (argc > 2) {
                ulong len;
                int   i;

                for (i = 2, len = 0; i < argc; i += 1)
                        len += strlen (argv[i]) + 1;
                cmdline = malloc (len);

                for (i = 2, len = 0; i < argc; i += 1) {
                        if (i > 2)
                                cmdline[len++] = ' ';
                        strcpy (&cmdline[len], argv[i]);
                        len += strlen (argv[i]);
                }
        } else if ((cmdline = getenv ("bootargs")) == NULL) {
                cmdline = "";
        }

        loader = (void (*)(bd_t *, image_header_t *, char *, char *))image_get_ep (hdr);

        printf ("## Transferring control to NetBSD stage-2 loader (at address %08lx) ...\n",
                (ulong)loader);

        show_boot_progress (15);

        /*
         * NetBSD Stage-2 Loader Parameters:
         *   r3: ptr to board info data
         *   r4: image address
         *   r5: console device
         *   r6: boot args string
         */
        (*loader) (gd->bd, os_hdr, consdev, cmdline);
}

#ifdef CONFIG_LYNXKDI
static void do_bootm_lynxkdi (cmd_tbl_t *cmdtp, int flag,
                             int argc, char *argv[],
                             bootm_headers_t *images)
{
        image_header_t *hdr = images->legacy_hdr_os;

#if defined(CONFIG_FIT)
        if (!images->legacy_hdr_valid) {
                fit_unsupported_reset ("Lynx");
                do_reset (cmdtp, flag, argc, argv);
        }
#endif

        lynxkdi_boot ((image_header_t *)hdr);
}
#endif /* CONFIG_LYNXKDI */

static void do_bootm_rtems (cmd_tbl_t *cmdtp, int flag,
                           int argc, char *argv[],
                           bootm_headers_t *images)
{
        image_header_t *hdr = images->legacy_hdr_os;
        void (*entry_point)(bd_t *);

#if defined(CONFIG_FIT)
        if (!images->legacy_hdr_valid) {
                fit_unsupported_reset ("RTEMS");
                do_reset (cmdtp, flag, argc, argv);
        }
#endif

        entry_point = (void (*)(bd_t *))image_get_ep (hdr);

        printf ("## Transferring control to RTEMS (at address %08lx) ...\n",
                (ulong)entry_point);

        show_boot_progress (15);

        /*
         * RTEMS Parameters:
         *   r3: ptr to board info data
         */
        (*entry_point)(gd->bd);
}

#if defined(CONFIG_CMD_ELF)
static void do_bootm_vxworks (cmd_tbl_t *cmdtp, int flag,
                             int argc, char *argv[],
                             bootm_headers_t *images)
{
        char str[80];
        image_header_t *hdr = images->legacy_hdr_os;

#if defined(CONFIG_FIT)
        if (hdr == NULL) {
                fit_unsupported_reset ("VxWorks");
                do_reset (cmdtp, flag, argc, argv);
        }
#endif

        sprintf(str, "%x", image_get_ep (hdr)); /* write entry-point into string */
        setenv("loadaddr", str);
        do_bootvx(cmdtp, 0, 0, NULL);
}

static void do_bootm_qnxelf(cmd_tbl_t *cmdtp, int flag,
                            int argc, char *argv[],
                            bootm_headers_t *images)
{
        char *local_args[2];
        char str[16];
        image_header_t *hdr = images->legacy_hdr_os;

#if defined(CONFIG_FIT)
        if (!images->legacy_hdr_valid) {
                fit_unsupported_reset ("QNX");
                do_reset (cmdtp, flag, argc, argv);
        }
#endif

        sprintf(str, "%x", image_get_ep (hdr)); /* write entry-point into string */
        local_args[0] = argv[0];
        local_args[1] = str;    /* and provide it via the arguments */
        do_bootelf(cmdtp, 0, 2, local_args);
}
#endif

#if defined(CONFIG_ARTOS) && defined(CONFIG_PPC)
static void do_bootm_artos (cmd_tbl_t *cmdtp, int flag,
                           int argc, char *argv[],
                           bootm_headers_t *images)
{
        ulong top;
        char *s, *cmdline;
        char **fwenv, **ss;
        int i, j, nxt, len, envno, envsz;
        bd_t *kbd;
        void (*entry)(bd_t *bd, char *cmdline, char **fwenv, ulong top);
        image_header_t *hdr = images->legacy_hdr_os;

#if defined(CONFIG_FIT)
        if (!images->legacy_hdr_valid) {
                fit_unsupported_reset ("ARTOS");
                do_reset (cmdtp, flag, argc, argv);
        }
#endif

        /*
         * Booting an ARTOS kernel image + application
         */

        /* this used to be the top of memory, but was wrong... */
#ifdef CONFIG_PPC
        /* get stack pointer */
        asm volatile ("mr %0,1" : "=r"(top) );
#endif
        debug ("## Current stack ends at 0x%08lX ", top);

        top -= 2048;            /* just to be sure */
        if (top > CFG_BOOTMAPSZ)
                top = CFG_BOOTMAPSZ;
        top &= ~0xF;

        debug ("=> set upper limit to 0x%08lX\n", top);

        /* first check the artos specific boot args, then the linux args*/
        if ((s = getenv( "abootargs")) == NULL && (s = getenv ("bootargs")) == NULL)
                s = "";

        /* get length of cmdline, and place it */
        len = strlen (s);
        top = (top - (len + 1)) & ~0xF;
        cmdline = (char *)top;
        debug ("## cmdline at 0x%08lX ", top);
        strcpy (cmdline, s);

        /* copy bdinfo */
        top = (top - sizeof (bd_t)) & ~0xF;
        debug ("## bd at 0x%08lX ", top);
        kbd = (bd_t *)top;
        memcpy (kbd, gd->bd, sizeof (bd_t));

        /* first find number of env entries, and their size */
        envno = 0;
        envsz = 0;
        for (i = 0; env_get_char (i) != '\0'; i = nxt + 1) {
                for (nxt = i; env_get_char (nxt) != '\0'; ++nxt)
                        ;
                envno++;
                envsz += (nxt - i) + 1; /* plus trailing zero */
        }
        envno++;        /* plus the terminating zero */
        debug ("## %u envvars total size %u ", envno, envsz);

        top = (top - sizeof (char **) * envno) & ~0xF;
        fwenv = (char **)top;
        debug ("## fwenv at 0x%08lX ", top);

        top = (top - envsz) & ~0xF;
        s = (char *)top;
        ss = fwenv;

        /* now copy them */
        for (i = 0; env_get_char (i) != '\0'; i = nxt + 1) {
                for (nxt = i; env_get_char (nxt) != '\0'; ++nxt)
                        ;
                *ss++ = s;
                for (j = i; j < nxt; ++j)
                        *s++ = env_get_char (j);
                *s++ = '\0';
        }
        *ss++ = NULL;   /* terminate */

        entry = (void (*)(bd_t *, char *, char **, ulong))image_get_ep (hdr);
        (*entry) (kbd, cmdline, fwenv, top);
}
#endif