[U-Boot-Users] How big should U-Boot be for a 405EP based board?

[Wolfgang Denk]

In message <3FFDFC1D.200 at esteem.com> you wrote:
> 
> We have a single flash chip on our board that will be either 4MB or 8MB. 
> Due to the way that the 405EP boots up I thought that the smallest I 
> could ever get U-Boot's binary image was two megs. However, when I 

You maust be doing something very strange. 

> compile and link it it turns out to be 256K. Is this correct or am I 
> mistaken on the minimal size of U-Boot for a 405EP based board?

U-Boot easily fits in 170...240 kB.

You did not ptovide any details, so I can only speculate that you put
the U-Boot start address somewhere in lower  flash  memory.  Remember
that  the  405 uses 0xFFFFFFFC as reset address, so if you put U-Boot
at 0xFF000000 the binary image will have to cover all the range  from
0xFF000000  to  0xFFFFFFFF (= 16 MB) even if only 200 kB are actually
used. Just put U-Boot to a high  address  in  flash,  something  like
0xFFFC0000

Best regards,

Wolfgang Denk

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