From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ian Campbell <ijc@hellion.org.uk>
Date: Sat, 17 Jan 2015 22:44:19 +0000
Subject: [U-Boot] [PATCH 04/12] sunxi: Update sunxi-common.h to deal
 with different DRAM base addr on sun9i
In-Reply-To: <1421333554-29822-5-git-send-email-hdegoede@redhat.com>
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	<1421333554-29822-5-git-send-email-hdegoede@redhat.com>
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On Thu, 2015-01-15 at 15:52 +0100, Hans de Goede wrote:
> The DRAM Base differs between sun9i and the others and we cannot use
> math in various places like the environment setting and linker scripts,
> so "simply" define everything which contains the SDRAM_BASE twice.

Is it really not possible to use maths in linker scripts? How have I
never noticed that...

Anyway, given that things only differ in the most significant nibble of
the RAM base address I think something like this might work:

/* NB: find out if one of these is already available somewhere */
#define __stringify(x) #x 
#define stringify(x) __stringify(x)

#define SDRAM_OFFSET(x) 0x2##x /* or 0x4 */
#define CONFIG_SYS_SDRAM_BASE SDRAM_OFFSET(0000000)

#define MEM_LAYOUT_ENV_SETTINGS \
	"kernel_addr_r=" stringify(SDRAM_OFFSET(200000)) "\0"
        ...

Ian.