Wolfgang Denk wrote:
Instead of hard-coding magic addresses which then need to be changed again and again, would it not make more sense to read the value from an environment variable so it can be easily changed without having to modify the source, rebuild, reinstall all the time?
(Adding Haiying)
Well, I tried that a while back and it didn't work, but I can't remember why. That was before I implemented a unified approach to Fman ucode identification, so maybe it will work better now.
Part of the problem is that the meaning of the address depends on where the ucode actually is stored -- NOR flash, NAND flash, SPI flash, etc. I suppose we could do something like this:
ucode_loc=nor:eff40000
And then at runtime parse the 'nor' and the 'eff40000'. I just wish I could remember why I rejected the env variable approach back then.
Haiying, is there ever a situation where we need to upload the QE ucode *before* the environment variables are available?