[U-Boot] [PATCHv3 2/3] driver/ddr/altera/: Add the sdram calibration portion

Pavel Machek
2015-05-25T12:37:50Z

Hi!

> +/******************************************************************************
> + ******************************************************************************
> + ** NOTE: Special Rules for Globale Variables **

They are global, not globale.

> + ** All global variables that are explicitly initialized (including **
> + ** explicitly initialized to zero), are only initialized once, during **
> + ** configuration time, and not again on reset. This means that they **
> + ** preserve their current contents across resets, which is needed for some **
> + ** special cases involving communication with external modules. In **
> + ** addition, this avoids paying the price to have the memory initialized, **
> + ** even for zeroed data, provided it is explicitly set to zero in the code, **
> + ** and doesn't rely on implicit initialization. **
> + ******************************************************************************
> +

Is this sane thing to do? How does it work for variables in other
sources?

What penalty is there for just redoing initialization from scratch
each time?

Thanks,
Pavel

--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html