From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with archive (Exim 4.43) id 1DVhAt-0000mG-Sk for mharc-grub-devel@gnu.org; Tue, 10 May 2005 22:42:15 -0400 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1DVhAr-0000lI-DY for grub-devel@gnu.org; Tue, 10 May 2005 22:42:13 -0400 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1DVh5N-0008Jp-Bj for grub-devel@gnu.org; Tue, 10 May 2005 22:36:33 -0400 Received: from [199.232.76.173] (helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1DVh5K-00083e-9i for grub-devel@gnu.org; Tue, 10 May 2005 22:36:30 -0400 Received: from [64.233.184.195] (helo=wproxy.gmail.com) by monty-python.gnu.org with esmtp (Exim 4.34) id 1DVgnN-0006bW-Cz for grub-devel@gnu.org; Tue, 10 May 2005 22:17:57 -0400 Received: by wproxy.gmail.com with SMTP id 36so2515730wra for ; Tue, 10 May 2005 19:11:26 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:reply-to:to:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=Yy0OfKWWsKAGvx6NXoaL9BDRVC2REH9fxJ6iIzggkkvC5GmiR1Bc/R1Jsp1PrMUKmmQxDzC1KczzyBkUKAKEq4FjpTTpGDUs4jfovMuj127U7YMOS5fTdZzJjchzgEsqQukhyjNWFJAqzBMsQ7lODSbVrY+bf2jye/EW0JwjEug= Received: by 10.54.63.14 with SMTP id l14mr893249wra; Tue, 10 May 2005 19:11:26 -0700 (PDT) Received: by 10.54.34.79 with HTTP; Tue, 10 May 2005 19:11:26 -0700 (PDT) Message-ID: <29f916510505101911649ac1b7@mail.gmail.com> Date: Tue, 10 May 2005 22:11:26 -0400 From: alfred hitch To: The development of GRUB 2 In-Reply-To: <20050510121347.GA13949@openbios.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline References: <20050510085058.DEF762FAC4@smtp.263.net> <87y8an4emu.fsf@student.han.nl> <29f91651050510032358cc2370@mail.gmail.com> <20050510121347.GA13949@openbios.org> Subject: Re: Fwd: memory probing X-BeenThere: grub-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: The development of GRUB 2 List-Id: The development of GRUB 2 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 11 May 2005 02:42:13 -0000 Hi Stefan, thanks for your reply,=20 but I am still not very clear on how this is done by say bios on x86 plattforms, ? can u please expain in more detail abt this north bridge , south bridge thing .. ? I would like to try and recreate the same way of probing for our set up, may be its not that portable , but atleast works on our series of products .. What registers are these ?=20 Cheers, Alfred On 5/10/05, Stefan Reinauer wrote: > * alfred hitch [050510 12:23]: > > anyways, how can u get this from processor also ? >=20 > The processor has little to nothing to do with this.. it's dependent on > the northbridge and southbridge. >=20 > > I vaguely remember see'ing some code where someone on a i386 based > > plattform but WITHOUT bios, used smbus protocol to talk to a device > > across PIIX4 to get the info. >=20 > Which might work on one motherboard and fail on another. Even if they > both have a PIIX4. >=20 > > I am not familiar with PC architecture, so can someone tell me if > > there is some standard chip (memory controller? ?) where one can read > > this on PC type arch. atleast ? >=20 > No. Not in a portable way. That's why BIOS provides the e820 table. >=20 > > I am on a IXDP425 plattform, and so far I cannot see any such > > register on the data sheets .. >=20 > They are usually not disclosed in publically available datasheets. >=20 > Stefan >=20 >=20 > _______________________________________________ > Grub-devel mailing list > Grub-devel@gnu.org > http://lists.gnu.org/mailman/listinfo/grub-devel >