[U-Boot] hardware flash protect kept during a reboot?

[Stefan Roese]

Hi Timur,

On Friday 14 May 2010 21:33:28 Timur Tabi wrote:
> If I enable CONFIG_SYS_FLASH_PROTECTION and have a support flash chipset,
> are my protected sectors supposed to remain protected during a reboot?
> 
> That is, if I protect some flash sector, and then reboot U-Boot, I know
> U-Boot will not show the sector as being protected, because the
> info->protect[] array is initialized on every boot.  However, since I was
> using hardware protection, I expect the chip will still protect the sector.

This protection is chip specific. IIRC, then some Intel (Strata) chips either 
protect all sectors or have a sectore-wise protection mechanism. You need to 
check your FLASH documentation for the exact behaviour. Which chip are you 
using?

Please note that we have the special "unlock" env variable. By setting it to 
"yes", all sectors will be unlocked upon startup. At least on Intel Strata 
FLASH chips.

Cheers,
Stefan

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