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    /*
     * (C) Copyright 2012
     * Lei Wen <leiwen@marvell.com>, Marvell Inc.
     *
     * 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>
    
    static int do_zip(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
    {
    	unsigned long src, dst;
    	unsigned long src_len, dst_len = ~0UL;
    	char buf[32];
    
    	switch (argc) {
    		case 5:
    			dst_len = simple_strtoul(argv[4], NULL, 16);
    			/* fall through */
    		case 4:
    			src = simple_strtoul(argv[1], NULL, 16);
    			src_len = simple_strtoul(argv[2], NULL, 16);
    			dst = simple_strtoul(argv[3], NULL, 16);
    			break;
    		default:
    			return cmd_usage(cmdtp);
    	}
    
    	if (gzip((void *) dst, &dst_len, (void *) src, src_len) != 0)
    		return 1;
    
    	printf("Compressed size: %ld = 0x%lX\n", dst_len, dst_len);
    	sprintf(buf, "%lX", dst_len);
    	setenv("filesize", buf);
    
    	return 0;
    }
    
    U_BOOT_CMD(
    	zip,	5,	1,	do_zip,
    	"zip a memory region",
    	"srcaddr srcsize dstaddr [dstsize]"
    );