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- /* SPDX-License-Identifier: GPL-2.0+ */
- /*
- * (C) Copyright 2009
- * Marvell Semiconductor <www.marvell.com>
- * Written-by: Prafulla Wadaskar <prafulla@marvell.com>
- */
- #ifndef _UBOOT_CRC_H
- #define _UBOOT_CRC_H
- #include <compiler.h> /* 'uint*' definitions */
- /**
- * crc8() - Calculate and return CRC-8 of the data
- *
- * This uses an x^8 + x^2 + x + 1 polynomial. A table-based algorithm would
- * be faster, but for only a few bytes it isn't worth the code size
- *
- * lib/crc8.c
- *
- * @crc_start: CRC8 start value
- * @vptr: Buffer to checksum
- * @len: Length of buffer in bytes
- * @return CRC8 checksum
- */
- unsigned int crc8(unsigned int crc_start, const unsigned char *vptr, int len);
- /* lib/crc16.c - 16 bit CRC with polynomial x^16+x^12+x^5+1 (CRC-CCITT) */
- uint16_t crc16_ccitt(uint16_t crc_start, const unsigned char *s, int len);
- /**
- * crc16_ccitt_wd_buf - Perform CRC16-CCIT on an input buffer and return the
- * 16-bit result (network byte-order) in an output buffer
- *
- * @in: input buffer
- * @len: input buffer length
- * @out: output buffer (at least 2 bytes)
- * @chunk_sz: ignored
- */
- void crc16_ccitt_wd_buf(const uint8_t *in, uint len,
- uint8_t *out, uint chunk_sz);
- /* lib/crc32.c */
- /**
- * crc32 - Calculate the CRC32 for a block of data
- *
- * @crc: Input crc to chain from a previous calculution (use 0 to start a new
- * calculation)
- * @buf: Bytes to checksum
- * @len: Number of bytes to checksum
- * @return checksum value
- */
- uint32_t crc32(uint32_t crc, const unsigned char *buf, uint len);
- /**
- * crc32_wd - Calculate the CRC32 for a block of data (watchdog version)
- *
- * This checksums the data @chunk_sz bytes at a time, calling WATCHDOG_RESET()
- * after each chunk, to prevent the watchdog from firing.
- *
- * @crc: Input crc to chain from a previous calculution (use 0 to start a new
- * calculation)
- * @buf: Bytes to checksum
- * @len: Number of bytes to checksum
- * @chunk_sz: Chunk size to use between watchdog resets
- * @return checksum
- */
- uint32_t crc32_wd(uint32_t crc, const unsigned char *buf, uint len,
- uint chunk_sz);
- /**
- * crc32_no_comp - Calculate the CRC32 for a block of data (no one's compliment)
- *
- * This version uses a different algorithm which doesn't use one's compliment.
- * JFFS2 (and other things?) use this.
- *
- * @crc: Input crc to chain from a previous calculution (use 0 to start a new
- * calculation)
- * @buf: Bytes to checksum
- * @len: Number of bytes to checksum
- * @return checksum value
- */
- uint32_t crc32_no_comp(uint32_t crc, const unsigned char *buf, uint len);
- /**
- * crc32_wd_buf - Perform CRC32 on a buffer and return result in buffer
- *
- * @input: Input buffer
- * @ilen: Input buffer length
- * @output: Place to put checksum result (4 bytes)
- * @chunk_sz: Trigger watchdog after processing this many bytes
- */
- void crc32_wd_buf(const uint8_t *input, uint ilen, uint8_t *output,
- uint chunk_sz);
- /* lib/crc32c.c */
- /**
- * crc32c_init() - Set up a the CRC32 table
- *
- * This sets up 256-item table to aid in CRC32 calculation
- *
- * @crc32c_table: Place to put table
- * @pol: polynomial to use
- */
- void crc32c_init(uint32_t *crc32c_table, uint32_t pol);
- /**
- * crc32c_cal() - Perform CRC32 on a buffer given a table
- *
- * This algorithm uses the table (set up by crc32c_init() to speed up
- * processing.
- *
- * @crc: Previous crc (use 0 at start)
- * @data: Data bytes to checksum
- * @length: Number of bytes to process
- * @crc32c_table:: CRC table
- * @return checksum value
- */
- uint32_t crc32c_cal(uint32_t crc, const char *data, int length,
- uint32_t *crc32c_table);
- #endif /* _UBOOT_CRC_H */
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