ecc-sw.h File Reference

#include "ecc.h"

Functions
int	ecc_compare_block_256b (unsigned long *ecc_calc, unsigned long *ecc_oob, unsigned char *data, unsigned long *error_offset, unsigned char *corrected_value)
	Compare two ECCs for a 256 byte block. More...
void	ecc_make_block_256b (unsigned long *ecc, unsigned char *data)
	Generate ECC for a 256 byte block. More...

int ecc_compare_block_256b	(	unsigned long *	ecc1,
		unsigned long *	ecc2,
		unsigned char *	data,
		unsigned long *	error_offset,
		unsigned char *	corrected_value
	)

Compare two ECCs for a 256 byte block.

This function will compare two 3 byte ECC for a 256 byte data block. If an error is found the compare function will provide a fix if a single one bit error is found. Multiple errors are not possible to fix.

Parameters

ecc1	Pointer to a variable for ECC value to compare against ecc2.
ecc2	Pointer to a variable for ECC value to compare against ecc1.
data	Pointer to a 256 byte large buffer used when calculating the ecc1 and ecc2 ECC values.
error_offset	Pointer to a variable to store the byte offset of a detected single bit error.
corrected_value	Pointer to a variable to store the corrected byte if a single bit error was detected.

Returns

0 on success, an error number otherwise.

References i.

void ecc_make_block_256b	(	unsigned long *	ecc,
		unsigned char *	data
	)

Generate ECC for a 256 byte block.

This function will generate a 3 byte ECC for a 256 byte data block.

Parameters

ecc	Pointer to a variable to store the calculated ECC.
data	Pointer to a 256 byte large buffer to calculate the ECC value of.

References data, ecc_parity_table, i, and NAND_ECC_CHUNK_SIZE.