Hi Stephen, On Fri, Jun 15, 2012 at 1:49 AM, Stephen Warren <swar...@wwwdotorg.org>wrote:
> 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? > That is the setting used on Tegra, yes. This function permits selection of the three options. Regards, Simon
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