| // SPDX-License-Identifier: GPL-2.0+ |
| /* |
| * BTRFS filesystem implementation for U-Boot |
| * |
| * 2017 Marek Behun, CZ.NIC, marek.behun@nic.cz |
| */ |
| |
| #include "btrfs.h" |
| #include <u-boot/crc.h> |
| #include <asm/unaligned.h> |
| |
| static u32 btrfs_crc32c_table[256]; |
| |
| void btrfs_hash_init(void) |
| { |
| static int inited = 0; |
| |
| if (!inited) { |
| crc32c_init(btrfs_crc32c_table, 0x82F63B78); |
| inited = 1; |
| } |
| } |
| |
| u32 btrfs_crc32c(u32 crc, const void *data, size_t length) |
| { |
| return crc32c_cal(crc, (const char *) data, length, |
| btrfs_crc32c_table); |
| } |
| |
| u32 btrfs_csum_data(char *data, u32 seed, size_t len) |
| { |
| return btrfs_crc32c(seed, data, len); |
| } |
| |
| void btrfs_csum_final(u32 crc, void *result) |
| { |
| put_unaligned(cpu_to_le32(~crc), (u32 *)result); |
| } |