/* locates, validates, and loads ecc data from `f->fd' */
static int load_ecc(fec_handle *f)
{
check(f);
debug("size = %" PRIu64, f->data_size);
uint64_t offset = f->data_size - FEC_BLOCKSIZE;
if (parse_ecc(f, offset) == 0) {
debug("found at %" PRIu64 " (start %" PRIu64 ")", offset,
f->ecc.start);
return 0;
}
return -1;
}
static void ecc_test(NANDDriver *nandp, uint32_t block){
uint32_t corrupted;
uint32_t byte, bit;
const uint32_t ecclen = 28;
uint32_t ecc_ref, ecc_broken;
uint8_t op_status;
ecc_result_t ecc_result = ECC_NO_ERROR;
/* This test requires good block.*/
osalDbgCheck(!nandIsBad(nandp, block));
if (!is_erased(nandp, block))
nandErase(&NAND, block);
pattern_fill();
/*** Correctable errors ***/
op_status = nandWritePageData(nandp, block, 0,
nand_buf, nandp->config->page_data_size, &ecc_ref);
osalDbgCheck(0 == (op_status & 1)); /* operation failed */
nandReadPageData(nandp, block, 0,
nand_buf, nandp->config->page_data_size, &ecc_broken);
ecc_result = parse_ecc(ecclen, ecc_ref, ecc_broken, &corrupted);
osalDbgCheck(ECC_NO_ERROR == ecc_result); /* unexpected error */
/**/
byte = 0;
bit = 7;
invert_bit(nand_buf, byte, bit);
op_status = nandWritePageData(nandp, block, 1,
nand_buf, nandp->config->page_data_size, &ecc_broken);
osalDbgCheck(0 == (op_status & 1)); /* operation failed */
invert_bit(nand_buf, byte, bit);
ecc_result = parse_ecc(ecclen, ecc_ref, ecc_broken, &corrupted);
osalDbgCheck(ECC_CORRECTABLE_ERROR == ecc_result); /* this error must be correctable */
osalDbgCheck(corrupted == (byte * 8 + bit)); /* wrong correction code */
/**/
byte = 2047;
bit = 0;
invert_bit(nand_buf, byte, bit);
op_status = nandWritePageData(nandp, block, 2,
nand_buf, nandp->config->page_data_size, &ecc_broken);
osalDbgCheck(0 == (op_status & 1)); /* operation failed */
invert_bit(nand_buf, byte, bit);
ecc_result = parse_ecc(ecclen, ecc_ref, ecc_broken, &corrupted);
osalDbgCheck(ECC_CORRECTABLE_ERROR == ecc_result); /* this error must be correctable */
osalDbgCheck(corrupted == (byte * 8 + bit)); /* wrong correction code */
/**/
byte = 1027;
bit = 3;
invert_bit(nand_buf, byte, bit);
op_status = nandWritePageData(nandp, block, 3,
nand_buf, nandp->config->page_data_size, &ecc_broken);
osalDbgCheck(0 == (op_status & 1)); /* operation failed */
invert_bit(nand_buf, byte, bit);
ecc_result = parse_ecc(ecclen, ecc_ref, ecc_broken, &corrupted);
osalDbgCheck(ECC_CORRECTABLE_ERROR == ecc_result); /* this error must be correctable */
osalDbgCheck(corrupted == (byte * 8 + bit)); /* wrong correction code */
/*** Uncorrectable error ***/
byte = 1027;
invert_bit(nand_buf, byte, 3);
invert_bit(nand_buf, byte, 4);
op_status = nandWritePageData(nandp, block, 4,
nand_buf, nandp->config->page_data_size, &ecc_broken);
osalDbgCheck(0 == (op_status & 1)); /* operation failed */
invert_bit(nand_buf, byte, 3);
invert_bit(nand_buf, byte, 4);
ecc_result = parse_ecc(28, ecc_ref, ecc_broken, &corrupted);
osalDbgCheck(ECC_UNCORRECTABLE_ERROR == ecc_result); /* This error must be NOT correctable */
/*** make clean ***/
nandErase(&NAND, block);
}
