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Sachin pandhare

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Since: Aug 10, 2009
Posts: 1



(Msg. 1) Posted: Mon Aug 10, 2009 10:22 pm
Post subject: ioremap_nocache
Archived from groups: comp>os>linux>embedded (more info?)

hi,
In my system I have defined following system map using mem directive.
--------------------------------------------------------------------
0x0000 0000 96MB Start Linux
0x05FF FFFF End Linux
--------------------------------------------------------------------
0x0600 0000 32MB Start Reserved memory Hole
0x07FF FFFF End Reserved memory Hole
--------------------------------------------------------------------
0x0800 0000 128MB Start Linux
0x0FFF FFFF End Linux
--------------------------------------------------------------------
We have created the “Reserved memory Hole” using mem directive in
Linux. So Linux kernel is “not aware” of this reserved memory.

What will be the configuration state (cacheable/bufferable) of this
memory?

if we now call ioremap_nocache on this reserved memory chunk. it will
be configured as non-cacheable memory but will it be bufferable or
not?

thanks,
Sachin
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