This example shows how to enable checksum while using bootloader.
all:
{
id_code = 0x04ca8093
extended_id_code = 0x01
init = reginit.ini
image
{
{type=bootloader, checksum=sha3, file=PLM.elf}
{type=pmcdata, load=0xf0400000, file=pmc_cdo.bin}
}
}