Scott Wood scottwood@freescale.com wrote on 2010/11/24 22:41:19:
How about playing with BATs before entering C code, so that the image always appears at the same effective address?
hmm, never thought of that. The extra bonus would be that LINK_OFF should not be needed either.
After sleeping on it I realize that all direct accesses to the flash such as getting the env. will need to be adjusted instead.
You could have one small mapping for the U-Boot image, and another larger unchanging mapping that covers the whole flash.
Played a little with this but it seems like two BATs cannot overlap?
They can't overlap in effective address space. They can have overlapping physical addresses (make sure the WIMG bits are the same).
hmm, now its starting to get a bit messy, I have flash over and under my boot area. In general it may be hard to match any random layout.