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//==========================================================================

//

//      cksum.c

//

//      RedBoot POSIX CRC calculation/command

//

//==========================================================================

//####ECOSGPLCOPYRIGHTBEGIN####

// -------------------------------------------

// This file is part of eCos, the Embedded Configurable Operating System.

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.

// Copyright (C) 2002 Gary Thomas

//

// eCos 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 or (at your option) any later version.

//

// eCos 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 eCos; if not, write to the Free Software Foundation, Inc.,

// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.

//

// As a special exception, if other files instantiate templates or use macros

// or inline functions from this file, or you compile this file and link it

// with other works to produce a work based on this file, this file does not

// by itself cause the resulting work to be covered by the GNU General Public

// License. However the source code for this file must still be made available

// in accordance with section (3) of the GNU General Public License.

//

// This exception does not invalidate any other reasons why a work based on

// this file might be covered by the GNU General Public License.

//

// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.

// at http://sources.redhat.com/ecos/ecos-license/

// -------------------------------------------

//####ECOSGPLCOPYRIGHTEND####

//==========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):    gthomas

// Contributors: gthomas

// Date:         2001-01-31

// Purpose:      

// Description:  

//              

// This code is part of RedBoot (tm).

//

//####DESCRIPTIONEND####

//

//==========================================================================

#include <redboot.h>

// Compute a CRC, using the POSIX 1003 definition

RedBoot_cmd("cksum",

            "Compute a 32bit checksum [POSIX algorithm] for a range of memory",

            "-b <location> -l <length>",

            do_cksum

    );

void

do_cksum(int argc, char *argv[])

{

    struct option_info opts[2];

    unsigned long base, len, crc;

    bool base_set, len_set;

    init_opts(&opts[0], 'b', true, OPTION_ARG_TYPE_NUM,

              (void **)&base, (bool *)&base_set, "base address");

    init_opts(&opts[1], 'l', true, OPTION_ARG_TYPE_NUM,

              (void **)&len, (bool *)&len_set, "length");

    if (!scan_opts(argc, argv, 1, opts, 2, 0, 0, "")) {

        return;

    }

    if (!base_set || !len_set) {

        if (load_address >= (CYG_ADDRESS)ram_start &&

            load_address_end < (CYG_ADDRESS)ram_end &&

            load_address < load_address_end) {

            base = load_address;

            len = load_address_end - load_address;

            diag_printf("Computing cksum for area %p-%p\n",

                        base, load_address_end);

        } else {

            diag_printf("usage: cksum -b <addr> -l <length>\n");

            return;

        }

    }

    crc = cyg_posix_crc32((unsigned char *)base, len);

    diag_printf("POSIX cksum = %lu %lu (0x%08lx 0x%08lx)\n", crc, len, crc, len);

}