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Date:      Sun, 23 Jan 2011 18:56:04 +0300
From:      Alexandr Matveev <timon@timon.net.nz>
To:        hackers@freebsd.org
Subject:   How to read non-physical memory?
Message-ID:  <4D3C4F94.7020307@timon.net.nz>

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Hello.

   When FreeBSD boots with 'boot -v' it show SMAP:
SMAP type=01 base=0000000000000000 len=000000000009d800
SMAP type=02 base=000000000009d800 len=0000000000002800
SMAP type=02 base=00000000000e0000 len=0000000000020000
SMAP type=01 base=0000000000100000 len=00000000bfdb0000
<...>
SMAP type=02 base=00000000fed1c000 len=0000000000004000
<...>

   Memory range 0xfed1c000 - 0xfed2000 belongs to ICH8 mapped to memory 
configuration registers.
   If I correctly understand mem man page, /dev/mem allow to read only 
real physical memory. How can I read data from this range?

-- 
Alexandr Matveev




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