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| author |   Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
|---|---|---|
| committer | Angelos Mouzakitis <a.mouzakitis@virtualopensystems.com> | 2023-10-10 14:33:42 +0000 |
| commit | af1a266670d040d2f4083ff309d732d648afba2a (patch) | |
| tree | 2fc46203448ddcc6f81546d379abfaeb323575e9 /roms/u-boot/lib/crc32c.c | |
| parent | e02cda008591317b1625707ff8e115a4841aa889 (diff) | |
Change-Id: Iaf8d18082d3991dec7c0ebbea540f092188eb4ec
Diffstat (limited to 'roms/u-boot/lib/crc32c.c')
| -rw-r--r-- | roms/u-boot/lib/crc32c.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/roms/u-boot/lib/crc32c.c b/roms/u-boot/lib/crc32c.c new file mode 100644 index 000000000..016b34a52 --- /dev/null +++ b/roms/u-boot/lib/crc32c.c @@ -0,0 +1,38 @@ +// 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; + } +} |