From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Antonino A. Daplas" Subject: [PATCH] vesafb: Document mtrr boot option usage Date: Sat, 30 Jul 2005 09:55:47 +0800 Message-ID: <42EADE23.6010006@gmail.com> Reply-To: linux-fbdev-devel@lists.sourceforge.net Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: Received: from sc8-sf-mx2-b.sourceforge.net ([10.3.1.92] helo=mail.sourceforge.net) by sc8-sf-list1.sourceforge.net with esmtp (Exim 4.30) id 1DygZu-0007kx-9W for linux-fbdev-devel@lists.sourceforge.net; Fri, 29 Jul 2005 18:55:54 -0700 Received: from wproxy.gmail.com ([64.233.184.201]) by mail.sourceforge.net with esmtp (Exim 4.44) id 1DygZu-0004JR-8i for linux-fbdev-devel@lists.sourceforge.net; Fri, 29 Jul 2005 18:55:54 -0700 Received: by wproxy.gmail.com with SMTP id i20so683152wra for ; Fri, 29 Jul 2005 18:55:48 -0700 (PDT) Sender: linux-fbdev-devel-admin@lists.sourceforge.net Errors-To: linux-fbdev-devel-admin@lists.sourceforge.net List-Unsubscribe: , List-Id: List-Post: List-Help: List-Subscribe: , List-Archive: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: Andrew Morton Cc: Linux Fbdev development list Document mtrr boot option usage to Documentation/fb/vesafb.txt. From: Antonino Daplas Signed-off-by: Antonino Daplas --- vesafb.txt | 16 +++++++++++++++- 1 files changed, 15 insertions(+), 1 deletion(-) --- a/Documentation/fb/vesafb.txt +++ b/Documentation/fb/vesafb.txt @@ -144,7 +144,21 @@ vgapal Use the standard vga registers fo This is the default. pmipal Use the protected mode interface for palette changes. -mtrr setup memory type range registers for the vesafb framebuffer. +mtrr:n setup memory type range registers for the vesafb framebuffer + where n: + 0 - disabled (equivalent to nomtrr) + 1 - uncachable + 2 - write-back + 3 - write-combining (default) + 4 - write-through + + If you see the following in dmesg, choose the type that matches the + old one. In this example, use "mtrr:2". +... +mtrr: type mismatch for e0000000,8000000 old: write-back new: write-combining +... + +nomtrr disable mtrr vremap:n remap 'n' MiB of video RAM. If 0 or not specified, remap memory ------------------------------------------------------- SF.Net email is sponsored by: Discover Easy Linux Migration Strategies from IBM. Find simple to follow Roadmaps, straightforward articles, informative Webcasts and more! Get everything you need to get up to speed, fast. http://ads.osdn.com/?ad_id=7477&alloc_id=16492&op=click