5817c56d19
Change-Id: I746ea7805bae553a146130994d8174aa2e189610 Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr> Reviewed-on: https://review.coreboot.org/c/coreboot/+/43368 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Angel Pons <th3fanbus@gmail.com>
47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#ifndef CRC_BYTE_H
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#define CRC_BYTE_H
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#include <stddef.h>
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#include <stdint.h>
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/* This function is used to calculate crc7 byte by byte, with polynomial
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* x^7 + x^3 + 1.
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*
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* prev_crc: old crc result (0 for first)
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* data: new byte
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* return value: new crc result
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*/
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uint8_t crc7_byte(uint8_t prev_crc, uint8_t data);
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/* This function is used to calculate crc16 byte by byte, with polynomial
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* x^16 + x^12 + x^5 + 1.
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*
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* prev_crc: old crc result (0 for first)
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* data: new byte
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* return value: new crc result
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*/
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uint16_t crc16_byte(uint16_t prev_crc, uint8_t data);
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/* This function is used to calculate crc32 byte by byte, with polynomial
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* x^32 + x^26 + x^23 + x^22 + x^16 + x^12 + x^11 + x^10 + x^8 + x^7 +
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* x^5 + x^4 + x^2 + x + 1
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*
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* prev_crc: old crc result (0 for first)
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* data: new byte
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* return value: new crc result
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*/
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uint32_t crc32_byte(uint32_t prev_crc, uint8_t data);
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#define CRC(buf, size, crc_func) ({ \
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const uint8_t *_crc_local_buf = (const uint8_t *)buf; \
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size_t _crc_local_size = size; \
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__typeof__(crc_func(0, 0)) _crc_local_result = 0; \
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while (_crc_local_size--) { \
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_crc_local_result = crc_func(_crc_local_result, *_crc_local_buf++); \
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} \
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_crc_local_result; \
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})
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#endif /* CRC_BYTE_H */
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