Date: Sun, 1 Jan 2006 20:14:31 -0500
From: Kurt Wall <kwall@kurtwerks.com>
To: Ochal Christophe <ochal@kefren.be>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Need help with mtrr & agpgart
Message-ID: <20060102011431.GC5213@kurtwerks.com>
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On Mon, Jan 02, 2006 at 01:52:01AM +0100, Ochal Christophe took 0 lines to write:
> I've been doing a little digging in my system since i was unable to get
> DRI running on my current motherboard (see my prior posts regarding a
> possible bug in agpgart), and i noticed that i don't get any lines
> in /proc/mtrr expect for my main memory.
> 
> The entry seems correct, the size specified is also correct, however, i
> don't get any write-combining lines.
> 
> This is what i get:
> 
> eg00: base=0x00000000 ( 0MB), size=1024MB: write-back, count=1
> 
> This is what i should get:
> eg00: base=0x00000000 ( 0MB), size=1024MB: write-back, count=1
> reg01: base=0xd0000000 (3328MB), size= 128MB: write-combining, count=1
> reg02: base=0xf0000000 (3840MB), size= 128MB: write-combining, count=1

I don't get much better on my AMD64 system:

$ cat /proc/mtrr
reg00: base=0x00000000 (   0MB), size= 512MB: write-back, count=1
reg01: base=0x1ff00000 ( 511MB), size=   1MB: uncachable, count=1

Kurt
-- 
Be braver -- you can't cross a chasm in two small jumps.
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