2 *==========================================================================
6 * Interface for the CRC algorithms.
8 *==========================================================================
9 *####ECOSGPLCOPYRIGHTBEGIN####
10 * -------------------------------------------
11 * This file is part of eCos, the Embedded Configurable Operating System.
12 * Copyright (C) 2002 Andrew Lunn
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####
44 * Author(s): Andrew Lunn
45 * Contributors: Andrew Lunn
50 * This code is part of eCos (tm).
52 *####DESCRIPTIONEND####
54 *==========================================================================
57 #ifndef _SERVICES_CRC_CRC_H_
58 #define _SERVICES_CRC_CRC_H_
60 #include <linux/types.h>
64 # define __externC extern "C"
66 # define __externC extern
70 /* Compute a CRC, using the POSIX 1003 definition */
72 cyg_posix_crc32(unsigned char *s, int len);
74 /* Gary S. Brown's 32 bit CRC */
77 cyg_crc32(unsigned char *s, int len);
79 /* Gary S. Brown's 32 bit CRC, but accumulate the result from a */
80 /* previous CRC calculation */
83 cyg_crc32_accumulate(uint32_t crc, unsigned char *s, int len);
85 /* Ethernet FCS Algorithm */
88 cyg_ether_crc32(unsigned char *s, int len);
90 /* Ethernet FCS algorithm, but accumulate the result from a previous */
91 /* CRC calculation. */
94 cyg_ether_crc32_accumulate(uint32_t crc, unsigned char *s, int len);
96 /* 16 bit CRC with polynomial x^16+x^12+x^5+1 */
98 extern uint16_t cyg_crc16(unsigned char *s, int len);
100 #endif /* _SERVICES_CRC_CRC_H_ */