83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
39 lines
960 B
C
39 lines
960 B
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* 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.
|
|
*/
|
|
|
|
#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;
|
|
}
|
|
}
|