atmel_pmecc_params.c
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/*
* (C) Copyright 2014 Andreas Bießmann <andreas@biessmann.org>
*
* SPDX-License-Identifier: GPL-2.0+
*/
/*
* This is a host tool for generating an appropriate string out of board
* configuration. The string is required for correct generation of PMECC
* header which in turn is required for NAND flash booting of Atmel AT91 style
* hardware.
*
* See doc/README.atmel_pmecc for more information.
*/
#include <config.h>
#include <stdlib.h>
static int pmecc_get_ecc_bytes(int cap, int sector_size)
{
int m = 12 + sector_size / 512;
return (m * cap + 7) / 8;
}
int main(int argc, char *argv[])
{
unsigned int use_pmecc = 0;
unsigned int sector_per_page;
unsigned int sector_size = CONFIG_PMECC_SECTOR_SIZE;
unsigned int oob_size = CONFIG_SYS_NAND_OOBSIZE;
unsigned int ecc_bits = CONFIG_PMECC_CAP;
unsigned int ecc_offset;
#ifdef CONFIG_ATMEL_NAND_HW_PMECC
use_pmecc = 1;
#endif
sector_per_page = CONFIG_SYS_NAND_PAGE_SIZE / CONFIG_PMECC_SECTOR_SIZE;
ecc_offset = oob_size -
pmecc_get_ecc_bytes(ecc_bits, sector_size) * sector_per_page;
printf("usePmecc=%d,", use_pmecc);
printf("sectorPerPage=%d,", sector_per_page);
printf("sectorSize=%d,", sector_size);
printf("spareSize=%d,", oob_size);
printf("eccBits=%d,", ecc_bits);
printf("eccOffset=%d", ecc_offset);
printf("\n");
exit(EXIT_SUCCESS);
}