[U-Boot-Users] Where does U-Boot's CFI driver check for top/bottom boot?

Stefan Roese sr at denx.de
Sat Nov 4 11:03:12 CET 2006

Hi Tolunay,

On Friday 03 November 2006 23:58, Tolunay Orkun wrote:
> I just looked at the datasheet of your flash part as well as datasheet
> of a couple of intel flash parts as well as the current code. As I
> suspected for your particular part, it looks like they are using the
> same values for "Erase Bank Area 1" and "Erase Bank Area 2" irrespective
> of top boot or bottom boot flash. I think, this is fundamentally wrong
> and non-compliant with the general CFI standard.
> I will look at some AMD part datasheets. If this is generally available
> on all AMD and AMD like parts, we can add it as a patch for AMD only.
> Otherwise, we will either add CONFIG_GEOMETRY_REVERSED definition or
> restrict a patch to specific vendor ids (and possibly part ids) which is
> then a pain to manage.

I suggest that we also look at the linux mtd cfi driver to see, if and how 
those devices are handled. I remember seeing something like "broken CFI 
table" in the linux bootlog on some boards.

Best regards,

More information about the U-Boot mailing list