[U-Boot] [RFC] command/cache: Add flush_cache command

[Wolfgang Denk]

Dear York Sun,

In message <1363724992-9803-1-git-send-email-yorksun at freescale.com> you wrote:
> When we need the copied code/data in the main memory, we can flush the
> cache now. It uses the existing function flush_cache. Syntax is
> 
> flush_cache <addr> <size>
> 
> The addr and size are given in hexadecimal. Like memory command, there is
> no sanity check for the parameters.

Why would it be necessary to ever run this manually?

I feel you are just papering over bugs / shortcomings elsewhere in the
code.  Should we not rather fix the places where the cache flushes are
missing in the code?

Best regards,

Wolfgang Denk

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