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    /*
     * (C) Copyright 2011 - 2012 Samsung Electronics
     * EXT4 filesystem implementation in Uboot by
     * Uma Shankar <uma.shankar@samsung.com>
     * Manjunatha C Achar <a.manjunatha@samsung.com>
     *
     * Ext4fs support
     * made from existing cmd_ext2.c file of Uboot
     *
     * (C) Copyright 2004
     * esd gmbh <www.esd-electronics.com>
     * Reinhard Arlt <reinhard.arlt@esd-electronics.com>
     *
     * made from cmd_reiserfs by
     *
     * (C) Copyright 2003 - 2004
     * Sysgo Real-Time Solutions, AG <www.elinos.com>
     * Pavel Bartusek <pba@sysgo.com>
     *
     * 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
     *
     */
    
    /*
     * Changelog:
     *	0.1 - Newly created file for ext4fs support. Taken from cmd_ext2.c
     *	        file in uboot. Added ext4fs ls load and write support.
     */
    
    #include <common.h>
    #include <part.h>
    #include <config.h>
    #include <command.h>
    #include <image.h>
    #include <linux/ctype.h>
    #include <asm/byteorder.h>
    #include <ext_common.h>
    #include <ext4fs.h>
    #include <linux/stat.h>
    #include <malloc.h>
    
    #if defined(CONFIG_CMD_USB) && defined(CONFIG_USB_STORAGE)
    #include <usb.h>
    #endif
    
    #if !defined(CONFIG_DOS_PARTITION) && !defined(CONFIG_EFI_PARTITION)
    #error DOS or EFI partition support must be selected
    #endif
    
    uint64_t total_sector;
    uint64_t part_offset;
    
    #define DOS_PART_MAGIC_OFFSET		0x1fe
    #define DOS_FS_TYPE_OFFSET		0x36
    #define DOS_FS32_TYPE_OFFSET		0x52
    
    int do_ext4_load(cmd_tbl_t *cmdtp, int flag, int argc,
    						char *const argv[])
    {
    	if (do_ext_load(cmdtp, flag, argc, argv))
    		return -1;
    
    	return 0;
    }
    
    int do_ext4_ls(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
    {
    	if (do_ext_ls(cmdtp, flag, argc, argv))
    		return -1;
    
    	return 0;
    }
    
    U_BOOT_CMD(ext4ls, 4, 1, do_ext4_ls,
    	   "list files in a directory (default /)",
    	   "<interface> <dev[:part]> [directory]\n"
    	   "	  - list files from 'dev' on 'interface' in a 'directory'");
    
    U_BOOT_CMD(ext4load, 6, 0, do_ext4_load,
    	   "load binary file from a Ext4 filesystem",
    	   "<interface> <dev[:part]> [addr] [filename] [bytes]\n"
    	   "	  - load binary file 'filename' from 'dev' on 'interface'\n"
    	   "		 to address 'addr' from ext4 filesystem");