1 // SPDX-License-Identifier: GPL-2.0+
3 * (C) Copyright 2014 Andreas Bießmann <andreas@biessmann.org>
7 * This is a host tool for generating an appropriate string out of board
8 * configuration. The string is required for correct generation of PMECC
9 * header which in turn is required for NAND flash booting of Atmel AT91 style
12 * See doc/README.atmel_pmecc for more information.
18 static int pmecc_get_ecc_bytes(int cap
, int sector_size
)
20 int m
= 12 + sector_size
/ 512;
21 return (m
* cap
+ 7) / 8;
24 int main(int argc
, char *argv
[])
26 unsigned int use_pmecc
= 0;
27 unsigned int sector_per_page
;
28 unsigned int sector_size
= CONFIG_PMECC_SECTOR_SIZE
;
29 unsigned int oob_size
= CONFIG_SYS_NAND_OOBSIZE
;
30 unsigned int ecc_bits
= CONFIG_PMECC_CAP
;
31 unsigned int ecc_offset
;
33 #ifdef CONFIG_ATMEL_NAND_HW_PMECC
37 sector_per_page
= CONFIG_SYS_NAND_PAGE_SIZE
/ CONFIG_PMECC_SECTOR_SIZE
;
38 ecc_offset
= oob_size
-
39 pmecc_get_ecc_bytes(ecc_bits
, sector_size
) * sector_per_page
;
41 printf("usePmecc=%d,", use_pmecc
);
42 printf("sectorPerPage=%d,", sector_per_page
);
43 printf("sectorSize=%d,", sector_size
);
44 printf("spareSize=%d,", oob_size
);
45 printf("eccBits=%d,", ecc_bits
);
46 printf("eccOffset=%d", ecc_offset
);