I am having trouble finding a clear answer to this in the documentation.
Does the LS1043A prebootloader support redundant boot from SD or eMMC. i.e. can I have more than one copy of the RCW + bl2 on the device, and the PBL will fall back to the secondary copy if the first copy is corrupted.
My reading of section 29 of the RM suggests that the PBL will search starting at 0x1000 for the PBL preamble. This suggests that the preamble could be found anywhere after this point in the device. However, my reading also suggests that if this preamble is found, but any other issue occurs (e.g. CRC failure of the pre-boot initialization commands, corrupted bl2 image) that an error will be generated. Does the PBL continue searching after such an error, or does the system stall?
We would like to try to mitigate data corruption making our system unbootable.
Initial experiments suggest this might not be possible. I burned the RCW+bl2 image (bl2_sd.pbl) at 0x1200 instead of 0x1000 and the system does not boot. Is there perhaps something in the image (e.g. a load offset to fetch bl2) that would also need to be modified?
If this is not possible from SD/eMMC, is there any storage types on which this is possible?
