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Give the app space to grow in internal KVStore default configuration #9156

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Give the app space to grow in internal KVStore default configuration #9156

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21 changes: 21 additions & 0 deletions features/storage/kvstore/conf/kv_config.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -547,6 +547,27 @@ int _storage_config_TDB_INTERNAL()
return MBED_ERROR_FAILED_OPERATION;
}
internal_start_address = align_up(FLASHIAP_APP_ROM_END_ADDR, flash.get_sector_size(FLASHIAP_APP_ROM_END_ADDR));

// Give the application a couple of spare sectors to grow (if there are such)
bd_size_t spare_size_for_app = 0;
bd_addr_t curr_addr = internal_start_address;
bd_addr_t flash_end_address = flash.get_flash_start() + flash.get_flash_size();

int spare_sectors_for_app = 2;
int min_sectors_for_storage = 2;
for (int i = 0; i < spare_sectors_for_app + min_sectors_for_storage - 1; i++) {
bd_size_t sector_size = flash.get_sector_size(curr_addr);
curr_addr += sector_size;
if (curr_addr >= flash_end_address) {
spare_size_for_app = 0;
break;
}
if (i < spare_sectors_for_app) {
spare_size_for_app += sector_size;
}
}
internal_start_address += spare_size_for_app;

flash.deinit();
}

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