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Tom Rini10e47792018-05-06 17:58:06 -04001// SPDX-License-Identifier: GPL-2.0+
Marek Behún29387542017-09-03 17:00:28 +02002/*
3 * BTRFS filesystem implementation for U-Boot
4 *
5 * 2017 Marek Behun, CZ.NIC, marek.behun@nic.cz
Marek Behún29387542017-09-03 17:00:28 +02006 */
7
8#include "btrfs.h"
9#include <u-boot/crc.h>
Alberto Sánchez Molerod1f43332018-01-20 09:17:57 +020010#include <asm/unaligned.h>
Marek Behún29387542017-09-03 17:00:28 +020011
12static u32 btrfs_crc32c_table[256];
13
14void btrfs_hash_init(void)
15{
16 static int inited = 0;
17
18 if (!inited) {
19 crc32c_init(btrfs_crc32c_table, 0x82F63B78);
20 inited = 1;
21 }
22}
23
24u32 btrfs_crc32c(u32 crc, const void *data, size_t length)
25{
26 return crc32c_cal(crc, (const char *) data, length,
27 btrfs_crc32c_table);
28}
29
30u32 btrfs_csum_data(char *data, u32 seed, size_t len)
31{
32 return btrfs_crc32c(seed, data, len);
33}
34
35void btrfs_csum_final(u32 crc, void *result)
36{
Alberto Sánchez Molerod1f43332018-01-20 09:17:57 +020037 put_unaligned(cpu_to_le32(~crc), (u32 *)result);
Marek Behún29387542017-09-03 17:00:28 +020038}