1 /* 2 * BTRFS filesystem implementation for U-Boot 3 * 4 * 2017 Marek Behun, CZ.NIC, marek.behun@nic.cz 5 * 6 * SPDX-License-Identifier: GPL-2.0+ 7 */ 8 9 #include "btrfs.h" 10 #include <u-boot/crc.h> 11 #include <asm/unaligned.h> 12 13 static u32 btrfs_crc32c_table[256]; 14 15 void btrfs_hash_init(void) 16 { 17 static int inited = 0; 18 19 if (!inited) { 20 crc32c_init(btrfs_crc32c_table, 0x82F63B78); 21 inited = 1; 22 } 23 } 24 25 u32 btrfs_crc32c(u32 crc, const void *data, size_t length) 26 { 27 return crc32c_cal(crc, (const char *) data, length, 28 btrfs_crc32c_table); 29 } 30 31 u32 btrfs_csum_data(char *data, u32 seed, size_t len) 32 { 33 return btrfs_crc32c(seed, data, len); 34 } 35 36 void btrfs_csum_final(u32 crc, void *result) 37 { 38 put_unaligned(cpu_to_le32(~crc), (u32 *)result); 39 } 40