Booting From Flash

assume nios cpu 0 tries to programm the cfi flash, then no other nios cpu or any other master should access the cfi flash as it disturbs the programming algorithm. have a look at the datasheet of these cfi flash devices. there is a given access order you must use otherwise it could happen that the cfi flash wont accept a programming information due to an out of order access from a different master. in that case the programming cpu won't notice that and you will hardly dig down your false cfi flash programming.