In message 46535865.6060400@smiths-aerospace.com you wrote:
Looks to me like it would be better defined: #define CFG_ENV_SIZE 0x2000 #define CFG_ENV_ADDR (CFG_MONITOR_BASE - CFG_ENV_SIZE)
No, this is broken as CFG_ENV_SIZE may be (and often actually is) smaller than CFG_ENV_SECT_SIZE
The saving grace here is probably:
- For a RAMBOOT image, there isn't any incentive to save lots of stuff
in the env since it (generally) disappears on a reboot and definitely disappears on a power cycle.
One could argue that a correctly configured ramboot version would access the original copy of the environment in flash. But such discussion is void, as ramboot itself it not supported officially.
- On the PowerPC, at least, the first 12K of u-boot.bin is the HRCW and
vectors which aren't used by a RAMBOOT image so overwriting them is a non-fatal error.
Wrong. You may have timer and other interrupts, so overwriting the exception vectors is a Bad Thing (TM).
Best regards,
Wolfgang Denk