/*
   * Copied from Linux kernel crypto/crc32c.c
   * Copyright (c) 2004 Cisco Systems, Inc.
   * Copyright (c) 2008 Herbert Xu <herbert@gondor.apana.org.au>
   *
   * This program 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 of the License, or (at your option)
   * any later version.
   * SPDX-License-Identifier:	GPL-2.0+
   */
  
  #include <common.h>
  #include <compiler.h>
  
  uint32_t crc32c_cal(uint32_t crc, const char *data, int length,
  		    uint32_t *crc32c_table)
  {
  	while (length--)
  		crc = crc32c_table[(u8)(crc ^ *data++)] ^ (crc >> 8);
  
  	return crc;
  }
  
  void crc32c_init(uint32_t *crc32c_table, uint32_t pol)
  {
  	int i, j;
  	uint32_t v;
  	const uint32_t poly = pol; /* Bit-reflected CRC32C polynomial */
  
  	for (i = 0; i < 256; i++) {
  		v = i;
  		for (j = 0; j < 8; j++)
  			v = (v >> 1) ^ ((v & 1) ? poly : 0);
  
  		crc32c_table[i] = v;
  	}
  }