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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 Free Software Foundation, Inc.
//
// 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.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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 v2.
//
// This exception does not invalidate any other reasons why a work based
// on this file might be covered by the GNU General Public 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 %lx-%lx\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);
}
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