[U-Boot-Users] Increasing U-Boot partition size

Jerry Van Baren gerald.vanbaren at ge.com
Mon Aug 4 22:35:24 CEST 2008


Wolfgang Denk wrote:
> In message <489765FB.1010002 at ge.com> you wrote:
>>> Your choices are 0xfff00000 and zero, based on the BMS (Boot Memory 
>>> Space) bit of the low reset control word.
>>>
>>> -Scott
>> ...and of the two options, I recommend 0xfff00000 ("boot high").  Note 
>> that the start of u-boot is 0xfff00000 but the reset vector itself is 
>> 0xfff00100 (or 0x00000100 for "boot low").  The first 0x100 bytes has 
>> the u-boot signature and version info.
> 
> I disagree.
> 
> High-booting systems are a PITA. You always lose a full  megabyte  at
> the  end of the flash of which usually only 256 kB or less are needed
> for U-Boot, wasting 0.75 MB.
> 
> Also, systems with varying number of flash banks and/or flash sizes
> are not really straightforward to handle.
> 
> Low-booting is much, much saner.
> 
> Best regards,
> 
> Wolfgang Denk

Arrr, my insanity.  Wolfgang is correct, of course.

Sorry,
gvb





More information about the U-Boot mailing list