Dear Keith,
in message OFD86B567B.6DB5DBFC-ON07257037.005D553D-07257037.005E4D94@mck.us.ray.com you wrote:
The nature of the design requires that the Xilinx System ACE compact flash card be the only nonvolatile memory on the board - no plain old FLASH memory or I2C EEPROM. Therefore, I would like to store the U-Boot environment as a file on the compact flash card.
This has been discussed before...
I have checked the latest CVS sources and it appears that no one has implemented this yet.
Right.
Before I take a crack at it, is anyone planning to do this or in the process of doing it? Does anyone have any advice or caveats?
This is not trivial to handle. The environment needs to be accessed very, very early in initialization - to read the console baudrate when starting the console driver. IDE / CompactFlash on the other hand gets initialized much, much later, long after relocating the whole stuff to RAM.
I don't see how these two situations mix easily. Can you attach a EEPROM via I2C or so?
Best regards,
Wolfgang Denk