From mboxrd@z Thu Jan  1 00:00:00 1970
From: =?ISO-8859-1?Q?Matthias_Wei=DFer?= <weisserm@arcor.de>
Date: Wed, 28 Apr 2010 08:29:49 +0200
Subject: [U-Boot] [PATCH 2/3] video: add support for display controller
 in MB86R0x SoCs
In-Reply-To: <20100422124157.A9EE9C36DD0@gemini.denx.de>
References: <1271932257-14618-1-git-send-email-weisserm@arcor.de>
	<1271932257-14618-2-git-send-email-weisserm@arcor.de>
	<1271932257-14618-3-git-send-email-weisserm@arcor.de>
	<20100422124157.A9EE9C36DD0@gemini.denx.de>
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Am 22.04.2010 14:41, schrieb Wolfgang Denk:
> Dear Matthias Weisser,
>
> In message<1271932257-14618-3-git-send-email-weisserm@arcor.de>  you wrote:
>> This patch adds support for the display controller in
>> the MB86R0x SoCs.
>>
>> Signed-off-by: Matthias Weisser<weisserm@arcor.de>
> ...
>> +	pGD->memSize = VIDEO_MEM_SIZE;
>> +	pGD->frameAdrs = PHYS_SDRAM + PHYS_SDRAM_SIZE - VIDEO_MEM_SIZE;
>
> Please pay attention to the global memory map requirements. PRAM might
> go first.

Can you please explain this a bit more in detail? I checked the source 
and README for CONFIG_PRAM and it seems to be reserving some space at 
the end of RAM. But I have only found reference to it in ppc and m68k code.

What would be the correct way to reserve some 2MB-4MB at the end of 
system RAM as a framebuffer for the integrated graphics device?

Thanks in advance

Matthias