1 //==========================================================================
5 // RedBoot POSIX CRC calculation/command
7 //==========================================================================
8 //####ECOSGPLCOPYRIGHTBEGIN####
9 // -------------------------------------------
10 // This file is part of eCos, the Embedded Configurable Operating System.
11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
12 // Copyright (C) 2002 Gary Thomas
14 // eCos is free software; you can redistribute it and/or modify it under
15 // the terms of the GNU General Public License as published by the Free
16 // Software Foundation; either version 2 or (at your option) any later version.
18 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
19 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
20 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
23 // You should have received a copy of the GNU General Public License along
24 // with eCos; if not, write to the Free Software Foundation, Inc.,
25 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
27 // As a special exception, if other files instantiate templates or use macros
28 // or inline functions from this file, or you compile this file and link it
29 // with other works to produce a work based on this file, this file does not
30 // by itself cause the resulting work to be covered by the GNU General Public
31 // License. However the source code for this file must still be made available
32 // in accordance with section (3) of the GNU General Public License.
34 // This exception does not invalidate any other reasons why a work based on
35 // this file might be covered by the GNU General Public License.
37 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
38 // at http://sources.redhat.com/ecos/ecos-license/
39 // -------------------------------------------
40 //####ECOSGPLCOPYRIGHTEND####
41 //==========================================================================
42 //#####DESCRIPTIONBEGIN####
45 // Contributors: gthomas
50 // This code is part of RedBoot (tm).
52 //####DESCRIPTIONEND####
54 //==========================================================================
58 // Compute a CRC, using the POSIX 1003 definition
61 "Compute a 32bit checksum [POSIX algorithm] for a range of memory",
62 "-b <location> -l <length>",
67 do_cksum(int argc, char *argv[])
69 struct option_info opts[2];
70 unsigned long base, len, crc;
71 bool base_set, len_set;
73 init_opts(&opts[0], 'b', true, OPTION_ARG_TYPE_NUM,
74 (void *)&base, (bool *)&base_set, "base address");
75 init_opts(&opts[1], 'l', true, OPTION_ARG_TYPE_NUM,
76 (void *)&len, (bool *)&len_set, "length");
77 if (!scan_opts(argc, argv, 1, opts, 2, 0, 0, "")) {
80 if (!base_set || !len_set) {
81 if (load_address >= (CYG_ADDRESS)ram_start &&
82 load_address_end < (CYG_ADDRESS)ram_end &&
83 load_address < load_address_end) {
85 len = load_address_end - load_address;
86 diag_printf("Computing cksum for area %lx-%lx\n",
87 base, load_address_end);
89 diag_printf("usage: cksum -b <addr> -l <length>\n");
93 crc = cyg_posix_crc32((unsigned char *)base, len);
94 diag_printf("POSIX cksum = %lu %lu (0x%08lx 0x%08lx)\n", crc, len, crc, len);