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

[Pavel Machek <pavel@denx.de>]

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

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