[U-Boot] [v3] command/cache: Add flush command

[York Sun <yorksun@freescale.com>]

On 04/05/2013 03:09 PM, Wolfgang Denk wrote:
> Dear York Sun,
> 
> In message <1365195056-20188-1-git-send-email-yorksun@freescale.com> you wrote:
>> When we copy code/data to the main memory, we may need to flush the
>> cache if required by architecture. It uses the existing function
>> flush_cache. Syntax is
>>
>> flush <addr> <size>
> 
> Plain "flush" is way too generic a name.  I think we should make it
> clear from the command invocation that we are dealing with caches
> here.
> 
> Actually I think we should not even use a new command for this - we
> already have the "dcahe" and "icache" commands for this purpose.
> 
> What do you think about implementiung this as a subcommand to
> "dcache"?  Something like:
> 
> So far:
> 
> 	dcache on
> 	dcache off
> 
> adding new:
> 
> 	dcache flush			=> flush all
> 	dcache flush <addr> <size>	=> flush range
> 
> I think this makes more sense.  Comments?
> 
>

It would if the command only deals with dcache. This command flushes
dcache _and_ invalidates icache.

If "flush_cache" is acceptable, we can use v2. If not, please suggest
one. My candidates are "flushcache", "cacheflush".

York