[U-Boot-Users] u-boot locking ?

[Pantelis Antoniou]

On Sunday 08 January 2006 17:21, alfred hitch wrote:
> Hi,
> 
> I have some (basic) question ..
> 1) Does u-boot lock the block on which it resides by default ?
> I mean the sector /erase block on which u-boot is there, it will be
> locked using the block lock  bit by default ?
> 
> Plafform in question being IXDP 425 with Intel J3 NOR Flash.
> 
> 2) The flash content changing has to work in block sizes erase -
> modify - write cyecles only ??
> 
> Reason for all this is that we have few boards on which u-boot is
> getting corrupted (on flash image corruption itself).
> And so am wondering even if its a noise issue, how can it first cause
> an unlock of sector before write.
> 
> Any help in understanding of above issues will be really appreciated,
> Regards,
> Alfred
> 
> 

AFAIK u-boot normally only software protects sectors (mark them internally as 
read-only). You can lock the sector(s) in your board startup routine. Remember
to do so after relocation to RAM.

Regards

Pantelis