[U-Boot-Users] Increasing U-Boot partition size
Wolfgang Denk
wd at denx.de
Mon Aug 4 22:33:11 CEST 2008
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
--
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Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
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