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//==========================================================================
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//
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// cksum.c
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//
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// RedBoot POSIX CRC calculation/command
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//
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//==========================================================================
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// ####ECOSGPLCOPYRIGHTBEGIN####
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// -------------------------------------------
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// This file is part of eCos, the Embedded Configurable Operating System.
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// Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
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//
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// eCos is free software; you can redistribute it and/or modify it under
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// the terms of the GNU General Public License as published by the Free
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// Software Foundation; either version 2 or (at your option) any later
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// version.
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//
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// eCos is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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// for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with eCos; if not, write to the Free Software Foundation, Inc.,
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// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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//
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// As a special exception, if other files instantiate templates or use
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// macros or inline functions from this file, or you compile this file
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// and link it with other works to produce a work based on this file,
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// this file does not by itself cause the resulting work to be covered by
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// the GNU General Public License. However the source code for this file
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// must still be made available in accordance with section (3) of the GNU
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// General Public License v2.
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//
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// This exception does not invalidate any other reasons why a work based
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// on this file might be covered by the GNU General Public License.
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// -------------------------------------------
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// ####ECOSGPLCOPYRIGHTEND####
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//==========================================================================
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//#####DESCRIPTIONBEGIN####
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//
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// Author(s): gthomas
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// Contributors: gthomas
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// Date: 2001-01-31
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// Purpose:
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// Description:
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//
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// This code is part of RedBoot (tm).
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//
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//####DESCRIPTIONEND####
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//
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//==========================================================================
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#include <redboot.h>
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// Compute a CRC, using the POSIX 1003 definition
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RedBoot_cmd("cksum",
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"Compute a 32bit checksum [POSIX algorithm] for a range of memory",
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"-b <location> -l <length>",
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do_cksum
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);
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void
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do_cksum(int argc, char *argv[])
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{
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struct option_info opts[2];
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unsigned long base, len, crc;
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bool base_set, len_set;
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init_opts(&opts[0], 'b', true, OPTION_ARG_TYPE_NUM,
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(void *)&base, (bool *)&base_set, "base address");
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init_opts(&opts[1], 'l', true, OPTION_ARG_TYPE_NUM,
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(void *)&len, (bool *)&len_set, "length");
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if (!scan_opts(argc, argv, 1, opts, 2, 0, 0, "")) {
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return;
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}
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if (!base_set || !len_set) {
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if (load_address >= (CYG_ADDRESS)ram_start &&
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load_address_end < (CYG_ADDRESS)ram_end &&
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load_address < load_address_end) {
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base = load_address;
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len = load_address_end - load_address;
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diag_printf("Computing cksum for area %lx-%lx\n",
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base, load_address_end);
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} else {
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diag_printf("usage: cksum -b <addr> -l <length>\n");
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return;
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}
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}
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crc = cyg_posix_crc32((unsigned char *)base, len);
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diag_printf("POSIX cksum = %lu %lu (0x%08lx 0x%08lx)\n", crc, len, crc, len);
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}
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