Dear Alex Dubov,
In message 605712.94797.qm@web37607.mail.mud.yahoo.com you wrote:
Until now, custom environment settings were just defined in the board config file. All that had to be done is to edit the file, recompile the u-boot and flash it to the target.
Sounds a bit cumbersome...
Now, however, this approach is not longer acceptable. This means, that environment must be either set manually on the target or maintained and flashed as a separate blob, which is considerably less convenient.
either ... or ...? There are many alternative approaches.
So, two question here:
- Is there a tool already which takes an environment description in some
form and produces a flashable blob?
Yes, several, actually.
If you insist on a binary blob, tools/envcrc has a --binary option to export the embedded environment as a binary blob.
However, I'd recommend to put your environment settings into a text file and create a script file from it, which you can then load and run on the target.
- If not, is there some extra include file which is considered
volatile and can hold user-defined environment settings?
No.
Best regards,
Wolfgang Denk