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Reserving a part of the system ram.

Subject: Reserving a part of the system ram.
From: Ronny Meeus <>
Date: Sat, 9 Feb 2013 14:23:03 +0100
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I have a board that has 4Gb of RAM which can completely be used by
Linux, except for a 64Mb block located just below the 2G boundary.
This block will be used to implement a kind of persistent storage.

On PPC we do this with a memreserve in the device tree but this does
not seem to work on MIPS.
Another option I found is the memmap kernel parameter, which  can also
be used the reserve a piece of memory that is reserved (something like
memmap=size$addres would do the trick, but no luck, this is also not

This is the Linux version I'm using for my project:
Linux version

What is the correct way to make this work?


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