[U-Boot] [PATCH RESEND 2/3] driver/ddr/altera/: Add the sdram calibration portion
Pavel Machek
pavel at denx.de
Sat Apr 25 19:27:13 CEST 2015
Hi!
> +++ b/drivers/ddr/altera/Makefile
> @@ -0,0 +1,12 @@
> +#
> +# (C) Copyright 2000-2003
> +# Wolfgang Denk, DENX Software Engineering, wd at denx.de.
Umm. Looks like nothing of Wolfgang's original code is remaining at this point,
you can delete this.
> +/******************************************************************************
> + ******************************************************************************
> + ** 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 true for variables in this .c file, or for all of them?
> +/*
> + * Temporary workaround to place the initial stack pointer at a safe
> + * offset from end
> + */
> +asm(".global __alt_stack_pointer");
> +asm("__alt_stack_pointer = " __stringify(STACK_POINTER));
How is this different from normal variable?
> +/* For HPS running on actual hardware */
> +
> +#define DLEVEL 0
DEBUG_LEVEL?
> +/*
> + * space around comma is required for varargs macro to remove comma if args
> + * is empty
> + */
> +#define BFM_GBL_SET(field, value)
> +#define BFM_GBL_GET(field) ((long unsigned int)0)
> +#define BFM_STAGE(stage)
> +#define BFM_INC_VFIFO
> +#define COV(label)
I don't get the comment, or the macros. Can you just remove them?
Thanks,
Pavel
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