[U-Boot] [RFC] cmd: mem: Allow 'cp' to use the optimized memcpy

[Tom Rini]

On Thu, Dec 15, 2016 at 01:23:15PM -0200, Fabio Estevam wrote:

> If CONFIG_USE_ARCH_MEMCPY is selected, let's use the assembly optimized
> memcpy implementation for the 'cp' command.
> 
> Currently only Blackfin uses memcpy for the 'cp' command, so extend
> this to the CONFIG_USE_ARCH_MEMCPY users.
> 
> Tested on a mx6qsabreauto board where a 5x gain in performance is seen
> when reading 10MB from the parallel NOR memory.
> 
> Signed-off-by: Fabio Estevam <fabio.estevam at nxp.com>
> ---
> Sending as RFC as I don't know if any extra checks would be required here,
> so I appreciate any feedback.

We should re-work this to simply call memcpy() always, outside of the
case of dealing with flash/dataflash as that would simplify this code,
no?

-- 
Tom
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