From: "Ph. Marek" <philipp.marek@bmlv.gv.at>
To: linux-kernel@vger.kernel.org
Subject: Can't access ACPI memory through /dev/mem
Date: Fri, 12 Mar 2004 10:18:35 +0100 [thread overview]
Message-ID: <200403121018.35207.philipp.marek@bmlv.gv.at> (raw)
Hello everybody!
My machine gives me for
$ cat /proc/iomem
00000000-0009fbff : System RAM
0009fc00-0009ffff : reserved
000a0000-000bffff : Video RAM area
000c0000-000c7fff : Video ROM
000d0000-000d9fff : Extension ROM
000f0000-000fffff : System ROM
00100000-0f7dffff : System RAM
00100000-0022ca51 : Kernel code
0022ca52-0029d8e3 : Kernel data
0f7e0000-0f7e7fff : ACPI Tables
0f7e8000-0f7fffff : ACPI Non-volatile Storage
80100000-801fffff : PCI Bus #01
80100000-8011ffff : Silicon Integrated Systems [SiS] SiS630 GUI
and so on.
Now I can access the whole area below the ACPI tables (I tried RAM, video and
system ROM, and kernel code/data).
But on reaching the ACPI tables and above (PCI space and so on) I get no data
(that is, vche blanks the screen).
I'd expect that for the PCI space - as this is really IO-memory and shouldn't
be messed with.
But I'd like to access the ACPI tables; especially the NVRAM, as some machines
store DMI data there.
This is on
Linux version 2.4.24-1-686 (herbert@gondolin) (gcc version 3.3.2 (Debian))
and an old 2.4.19 kernel.
Any tips? Help for accessing this memory space?
Regards,
Phil
next reply other threads:[~2004-03-12 9:19 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-12 9:18 Ph. Marek [this message]
[not found] <A6974D8E5F98D511BB910002A50A6647615F4E11@hdsmsx402.hd.intel.com>
2004-03-12 15:55 ` Len Brown
2004-03-15 12:58 ` Ph. Marek
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