In message 3FFDFC1D.200@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