cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
Log | Files | Refs | Submodules | LICENSE | sfeed.txt

crc-ccitt.h (841B)

      1/*
      2 * CRC16 (CCITT) Checksum Algorithm
      3 *
      4 * Copyright (c) 2021 Wind River Systems, Inc.
      5 *
      6 * Author:
      7 *   Bin Meng <bin.meng@windriver.com>
      8 *
      9 * From Linux kernel v5.10 include/linux/crc-ccitt.h
     10 *
     11 * SPDX-License-Identifier: GPL-2.0
     12 */
     13
     14#ifndef _CRC_CCITT_H
     15#define _CRC_CCITT_H
     16
     17extern uint16_t const crc_ccitt_table[256];
     18extern uint16_t const crc_ccitt_false_table[256];
     19
     20extern uint16_t crc_ccitt(uint16_t crc, const uint8_t *buffer, size_t len);
     21extern uint16_t crc_ccitt_false(uint16_t crc, const uint8_t *buffer, size_t len);
     22
     23static inline uint16_t crc_ccitt_byte(uint16_t crc, const uint8_t c)
     24{
     25    return (crc >> 8) ^ crc_ccitt_table[(crc ^ c) & 0xff];
     26}
     27
     28static inline uint16_t crc_ccitt_false_byte(uint16_t crc, const uint8_t c)
     29{
     30    return (crc << 8) ^ crc_ccitt_false_table[(crc >> 8) ^ c];
     31}
     32
     33#endif /* _CRC_CCITT_H */