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Old 08-11-2009, 01:17 AM   #1
sachin_pandhare
LQ Newbie
 
Registered: Jul 2005
Posts: 3

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ioremap_nocache


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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