We dont upgrade miniboot. It is so simple, we never have to upgrade it. It does not touch any cpu registers, memory configuration and such stuff.
It only scans the flash for an image with correct crc and starts it.
During the past two years, we have upgraded ppcboot/u-boot on live systems several times to add functionality, correct bugs etc.
But miniboot is the same.
All advanced stuff is done by u-boot. Shipping a system to a customer without a possibility to upgrade u-boot without risking a dead card is not an option IMHO.
/Thomas
Wolfgang Denk wrote:
In message 3FCD0356.30502@corelatus.com you wrote:
Sure there is a sw solution! We have been using it for 2 years now. Check out board "gth".
We use a pre loader called miniboot, which boots the first image with correct crc it finds in flash.
You are just shifting the problem to a diferent level, actually adding MORE complexity.
Just one question: How do you reliably field upgrade the "miniboot" image running on your board?
Best regards,
Wolfgang Denk