From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stephen Warren <swarren@wwwdotorg.org>
Date: Thu, 14 Jun 2012 17:49:12 -0600
Subject: [U-Boot] [PATCH v2 12/19] arm: Add control over cachability of
 memory regions
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	<1339604395-6621-13-git-send-email-sjg@chromium.org>
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On 06/13/2012 10:19 AM, Simon Glass wrote:
> Add support for adjusting the cachability of an L1 section by updating
> the MMU. The mmu_set_region_dcache() function allows drivers to make
> these changes after the MMU is set up.
> 
> It is implemented only for ARMv7 at present.
> 
> This is needed for LCD support, where we want to make the LCD frame buffer
> write-through (or off) rather than write-back.

Wouldn't performance be significantly better if the region was fully
cached, but flushed after each display surface update?