From: ebiederman@lnxi.com (Eric W. Biederman)
To: "Daniel Engström" <daniel@omicron.se>
Cc: robert@schwebel.de, linux-mtd@lists.infradead.org,
"Klaus-D . Walter" <k.d.walter@t-online.de>
Subject: Re: MTD concat layer
Date: 13 Feb 2002 07:01:35 -0700 [thread overview]
Message-ID: <m3sn85pjk0.fsf@DLT.linuxnetworx.com> (raw)
In-Reply-To: <20020213143336.C26867@jupiter.omicron.se>
Daniel Engström <daniel@omicron.se> writes:
> On 2002.02.13 12:37 Robert Schwebel wrote:
> > The DNP has only one Intel 28F016F3 flash chip. Does anybody know
> > something about the reason why this strange layout for the BIOS was
> > chosen?
>
> The realmode BIOS must reside at 0xf0000-0xfffff in system
> memory. Depending
> on which options the chipset offers to map the flash, the BIOS may have to
> be located in the middle of the flash device.
Hmm. Except the BIOS starts executing at 0xfffffff0 in system memory,
so ROMS chips usually reside at 0xfff00000 - 0xffffffff. Usually an
alias exists at 0xf0000-0xfffff is handy but not required. (I
don't use it when I port LinuxBIOS to a new board). But usually
0xf0000-0xfffff on x86 is surrounded by RAM so this does not appear to
be the reason.
Eric
next prev parent reply other threads:[~2002-02-13 13:50 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-02-12 18:40 MTD concat layer Robert Kaiser
2002-02-13 7:56 ` Suspend Erase bug in cfi_cmdset0001.c Joakim Tjernlund
2002-02-14 8:17 ` Joakim Tjernlund
2002-02-13 11:00 ` MTD concat layer Joakim Tjernlund
2002-02-13 11:04 ` David Woodhouse
2002-02-13 11:34 ` Robert Kaiser
2002-02-13 11:37 ` Robert Schwebel
2002-02-13 13:33 ` Daniel Engström
2002-02-13 14:01 ` Eric W. Biederman [this message]
2002-02-15 15:58 ` David Woodhouse
2002-02-15 17:43 ` Robert Kaiser
2002-02-15 18:02 ` David Woodhouse
2002-02-15 18:40 ` Jörn Engel
2002-02-16 10:33 ` Robert Kaiser
2002-02-16 10:43 ` Robert Kaiser
2002-02-16 10:43 ` David Woodhouse
2002-02-16 11:03 ` Robert Kaiser
2002-02-16 11:08 ` David Woodhouse
2002-02-16 14:56 ` Brian J. Fox
2002-02-17 10:36 ` Robert Kaiser
2002-02-17 19:05 ` Brian J. Fox
2002-02-18 8:48 ` Robert Kaiser
2002-02-18 9:05 ` David Woodhouse
2002-02-18 15:53 ` Brian J. Fox
2002-02-18 17:01 ` Robert Kaiser
2002-02-18 17:02 ` David Woodhouse
2002-02-18 15:46 ` Brian J. Fox
2002-02-20 14:28 ` Jonas Holmberg
2002-02-20 15:35 ` Robert Kaiser
2002-02-21 14:51 ` Jonas Holmberg
2002-02-26 11:32 ` Robert Kaiser
2002-03-06 13:37 ` Jonas Holmberg
2002-03-06 16:02 ` Robert Kaiser
-- strict thread matches above, loose matches on Subject: below --
2002-02-14 11:14 Jonas Holmberg
2002-03-08 16:08 Robert Kaiser
2002-03-08 16:22 ` David Woodhouse
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