/*
 * (C) Copyright 2001
 * Kyle Harris, kharris@nexus-tech.net
 *
 * 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
 */

/*
 * The "source" command allows to define "script images", i. e. files
 * that contain command sequences that can be executed by the command
 * interpreter. It returns the exit status of the last command
 * executed from the script. This is very similar to running a shell
 * script in a UNIX shell, hence the name for the command.
 */

/* #define DEBUG */

#include <common.h>
#include <command.h>
#include <image.h>
#include <malloc.h>
#include <asm/byteorder.h>
#if defined(CONFIG_8xx)
#include <mpc8xx.h>
#endif

int
source (ulong addr, const char *fit_uname)
{
        ulong           len;
        image_header_t  *hdr;
        ulong           *data;
        int             verify;
#if defined(CONFIG_FIT)
        const void*     fit_hdr;
        int             noffset;
        const void      *fit_data;
        size_t          fit_len;
#endif

        verify = getenv_yesno ("verify");

        switch (genimg_get_format ((void *)addr)) {
        case IMAGE_FORMAT_LEGACY:
                hdr = (image_header_t *)addr;

                if (!image_check_magic (hdr)) {
                        puts ("Bad magic number\n");
                        return 1;
                }

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

                if (verify) {
                        if (!image_check_dcrc (hdr)) {
                                puts ("Bad data crc\n");
                                return 1;
                        }
                }

                if (!image_check_type (hdr, IH_TYPE_SCRIPT)) {
                        puts ("Bad image type\n");
                        return 1;
                }

                /* get length of script */
                data = (ulong *)image_get_data (hdr);

                if ((len = uimage_to_cpu (*data)) == 0) {
                        puts ("Empty Script\n");
                        return 1;
                }

                /*
                 * scripts are just multi-image files with one component, seek
                 * past the zero-terminated sequence of image lengths to get
                 * to the actual image data
                 */
                while (*data++);
                break;
#if defined(CONFIG_FIT)
        case IMAGE_FORMAT_FIT:
                if (fit_uname == NULL) {
                        puts ("No FIT subimage unit name\n");
                        return 1;
                }

                fit_hdr = (const void *)addr;
                if (!fit_check_format (fit_hdr)) {
                        puts ("Bad FIT image format\n");
                        return 1;
                }

                /* get script component image node offset */
                noffset = fit_image_get_node (fit_hdr, fit_uname);
                if (noffset < 0) {
                        printf ("Can't find '%s' FIT subimage\n", fit_uname);
                        return 1;
                }

                if (!fit_image_check_type (fit_hdr, noffset, IH_TYPE_SCRIPT)) {
                        puts ("Not a image image\n");
                        return 1;
                }

                /* verify integrity */
                if (verify) {
                        if (!fit_image_check_hashes (fit_hdr, noffset)) {
                                puts ("Bad Data Hash\n");
                                return 1;
                        }
                }

                /* get script subimage data address and length */
                if (fit_image_get_data (fit_hdr, noffset, &fit_data, &fit_len)) {
                        puts ("Could not find script subimage data\n");
                        return 1;
                }

                data = (ulong *)fit_data;
                len = (ulong)fit_len;
                break;
#endif
        default:
                puts ("Wrong image format for \"source\" command\n");
                return 1;
        }

        debug ("** Script length: %ld\n", len);
        return run_command_list((char *)data, len, 0);
}

/**************************************************/
#if defined(CONFIG_CMD_SOURCE)
int
do_source (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
        ulong addr;
        int rcode;
        const char *fit_uname = NULL;

        /* Find script image */
        if (argc < 2) {
                addr = CONFIG_SYS_LOAD_ADDR;
                debug ("*  source: default load address = 0x%08lx\n", addr);
#if defined(CONFIG_FIT)
        } else if (fit_parse_subimage (argv[1], load_addr, &addr, &fit_uname)) {
                debug ("*  source: subimage '%s' from FIT image at 0x%08lx\n",
                                fit_uname, addr);
#endif
        } else {
                addr = simple_strtoul(argv[1], NULL, 16);
                debug ("*  source: cmdline image address = 0x%08lx\n", addr);
        }

        printf ("## Executing script at %08lx\n", addr);
        rcode = source (addr, fit_uname);
        return rcode;
}

#ifdef CONFIG_SYS_LONGHELP
static char source_help_text[] =
        "[addr]\n"
        "\t- run script starting at addr\n"
        "\t- A valid image header must be present"
#if defined(CONFIG_FIT)
        "\n"
        "For FIT format uImage addr must include subimage\n"
        "unit name in the form of addr:<subimg_uname>"
#endif
        "";
#endif

U_BOOT_CMD(
        source, 2, 0,   do_source,
        "run script from memory", source_help_text
);
#endif