From: Timur Tabi <ttabi@interactivesi.com>
To: linux-kernel@vger.kernel.org
Subject: Re: For comment: draft BIOS use document for the kernel
Date: Fri, 22 Jun 2001 11:32:09 -0500 [thread overview]
Message-ID: <JajKKC.A.Ay.KM3M7@dinero.interactivesi.com> (raw)
In-Reply-To: <E15DTfd-0003gI-00@the-village.bc.nu>
** Reply to message from Alan Cox <alan@lxorguk.ukuu.org.uk> on Fri, 22 Jun
2001 17:20:33 +0100 (BST)
> Firstly a call is made to BIOS INT 15 AX=0xE820 in order to read the
> E820 map. A maximum of 32 blocks are supported by current kernels. The
> 'SMAP' signature is required and tested. In addition the SMAP signature
> is restored each call, although not required by the specification in order
> to handle some know BIOS bugs.
FYI, in OS/2, the E820 call is made only on machines with a Pentium Pro or
higher, because apparently (and this is my guess) there are some motherboards
out there with older CPUs that don't return a reliable result to the E820 call.
--
Timur Tabi - ttabi@interactivesi.com
Interactive Silicon - http://www.interactivesi.com
next prev parent reply other threads:[~2001-06-22 16:32 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-06-22 16:20 Alan Cox
2001-06-22 15:50 ` Rob Landley
2001-06-22 16:32 ` Timur Tabi [this message]
2001-06-22 17:11 ` Brad Pepers
2001-06-30 14:47 ` Pavel Machek
2001-07-08 16:59 ` Brad Pepers
2001-06-23 20:26 ` Eric W. Biederman
2001-06-23 23:58 ` Riley Williams
2001-06-24 1:41 ` D. Stimits
2001-06-25 16:28 ` Timur Tabi
2001-06-22 17:32 Schilling, Richard
2001-06-22 17:42 ` Richard B. Johnson
2001-06-22 17:50 ` Alan Cox
2001-06-22 18:01 ` Richard B. Johnson
2001-06-22 19:05 ` H. Peter Anvin
2001-06-22 21:42 ` Alan Cox
2001-06-30 14:50 ` Pavel Machek
2001-06-22 18:19 ` Brian Gerst
2001-06-22 21:46 ` Alan Cox
2001-06-22 19:24 ` Albert D. Cahalan
2001-06-22 22:09 ` Alan Cox
2001-06-22 17:48 ` Alan Cox
2001-06-22 17:44 Dunlap, Randy
2001-06-22 17:55 ` Alan Cox
2001-06-22 18:25 Comfort, Dan W
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