// return valid index if found BMT, else return 0
static int load_bmt_data(int start, int pool_size)
{
int bmt_index = start + pool_size - 1; // find from the end
phys_bmt_struct phys_table;
int i;
MSG(INIT, "[%s]: begin to search BMT from block 0x%x\n", __FUNCTION__, bmt_index);
for (bmt_index = start + pool_size - 1; bmt_index >= start; bmt_index--)
{
if (nand_block_bad_bmt(OFFSET(bmt_index)))
{
MSG(INIT, "Skip bad block: %d\n", bmt_index);
continue;
}
if (!nand_read_page_bmt(PAGE_ADDR(bmt_index), dat_buf, oob_buf))
{
MSG(INIT, "Error found when read block %d\n", bmt_index);
continue;
}
if (!match_bmt_signature(dat_buf, oob_buf))
{
continue;
}
MSG(INIT, "Match bmt signature @ block: 0x%x\n", bmt_index);
memcpy(&phys_table, dat_buf + MAIN_SIGNATURE_OFFSET, sizeof(phys_table));
if (!valid_bmt_data(&phys_table))
{
MSG(INIT, "BMT data is not correct %d\n", bmt_index);
continue;
} else
{
bmt.mapped_count = phys_table.header.mapped_count;
bmt.version = phys_table.header.version;
// bmt.bad_count = phys_table.header.bad_count;
memcpy(bmt.table, phys_table.table, bmt.mapped_count * sizeof(bmt_entry));
MSG(INIT, "bmt found at block: %d, mapped block: %d\n", bmt_index, bmt.mapped_count);
for (i = 0; i < bmt.mapped_count; i++)
{
if (!nand_block_bad_bmt(OFFSET(bmt.table[i].bad_index)))
{
MSG(INIT, "block 0x%x is not mark bad, should be power lost last time\n", bmt.table[i].bad_index);
mark_block_bad_bmt(OFFSET(bmt.table[i].bad_index));
}
}
return bmt_index;
}
}
MSG(INIT, "bmt block not found!\n");
return 0;
}
// return valid index if found BMT, else return 0
static int load_bmt_data(int start, int pool_size)
{
int bmt_index = start + pool_size - 1; // find from the end
int i;
MSG("begin to search BMT from block %d \n", bmt_index);
for (bmt_index = start + pool_size - 1; bmt_index >= start; bmt_index--)
{
if (nand_block_bad_bmt(OFFSET(bmt_index), BAD_BLOCK_RAW) || nand_block_bad_bmt(OFFSET(bmt_index), BMT_BADBLOCK_GENERATE_LATER))
{
MSG("Skip bad block: %d \n", bmt_index);
continue;
}
if (nand_read_page_bmt(PAGE_ADDR(bmt_index), dat_buf, oob_buf))
{
MSG("Error found when read block: %d\n", bmt_index);
continue;
}
if (!match_bmt_signature(dat_buf, oob_buf))
{
continue;
}
MSG("Match bmt signature @ block: %d\n", bmt_index);
memcpy(&lbd_phys_table, dat_buf + MAIN_SIGNATURE_OFFSET, sizeof(lbd_phys_table));
if (!valid_bmt_data(&lbd_phys_table))
{
MSG("BMT data is not correct: %d\n", bmt_index);
continue;
}
else
{
bmt.mapped_count = lbd_phys_table.header.mapped_count;
bmt.version = lbd_phys_table.header.version;
memcpy(bmt.table, lbd_phys_table.table, bmt.mapped_count * sizeof(bmt_entry));
MSG("bmt found at block: %d, mapped block: %d\n", bmt_index, bmt.mapped_count);
for (i = 0; i < bmt.mapped_count; i++)
{
if (!nand_block_bad_bmt(OFFSET(bmt.table[i].bad_index), BAD_BLOCK_RAW))
{
MSG("block %d is not mark bad, should be power lost last time\n", bmt.table[i].bad_index);
mark_block_bad_bmt(OFFSET(bmt.table[i].bad_index), BAD_BLOCK_RAW);
}
}
return bmt_index;
}
}
MSG("bmt not found!\n");
return 0;
}