usr/src/lib/libefi/common/crc32_efi.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 2002 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 #include <sys/crc32.h>
  30
  31 static unsigned int crc32_tab[] = { CRC32_TABLE };
  32
  33 /*
  34  * Return a 32-bit CRC of the contents of the buffer.
  35  *
  36  * The seed is 0xffffffff and the result is XORed with 0xffffffff
  37  * because this is what the Itanium firmware expects.
  38  */
  39 unsigned int
  40 efi_crc32(const unsigned char *s, unsigned int len)
  41 {
  42         unsigned int crc32val;
  43
  44         CRC32(crc32val, s, len, -1U, crc32_tab);
  45
  46         return (crc32val ^ -1U);
  47 }