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From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Romit Dasgupta <romit@myrealbox.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: Trivial Change (E820map) : arch/i386/boot/setup.S
Date: 16 Jul 2003 19:18:10 +0100	[thread overview]
Message-ID: <1058379483.6600.47.camel@dhcp22.swansea.linux.org.uk> (raw)
In-Reply-To: <3F158C5F.1000300@myrealbox.com>

On Mer, 2003-07-16 at 18:33, Romit Dasgupta wrote:
> Hi,
>       After reading the e820 method from Ralf Brown's interrupt list(
> http://www.ctyme.com/intr/rb-1741.htm)
> it seems that the es register wont get thrashed. So there is no need to 
> repatedly execute (for getting each map entry) the following two lines 
> inside jmpe820: of seutp.S and thus can be moved out as below.  Is there 
> any reason to do it inside?

Yes - BIOSes and the specification are only distant relatives. We get
all sorts of fun from them - 0 sized regions, system ROM reported as
RAM, E801 returns in the wrong registers and so on


      reply	other threads:[~2003-07-16 18:09 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-07-16 17:33 Trivial Change (E820map) : arch/i386/boot/setup.S Romit Dasgupta
2003-07-16 18:18 ` Alan Cox [this message]

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