From: Wolfgang Denk <wd@denx.de>
To: Daris A Nevil <dnevil@snmc.com>
Cc: Alan Wang <wung_y@sina.com>,
Linuxppc-EmbeddedMaillist <linuxppc-embedded@lists.linuxppc.org>
Subject: Re: problem when read internal memory
Date: Wed, 11 Apr 2001 21:15:17 +0200 [thread overview]
Message-ID: <20010411191522.8F36D28417@denx.denx.de> (raw)
In-Reply-To: Your message of "Wed, 11 Apr 2001 12:06:54 CDT." <3AD48F2E.2C713B89@snmc.com>
In message <3AD48F2E.2C713B89@snmc.com> Daris A Nevil wrote:
>
> register to this same value before booting the Linux kernel. Your boot
> code should also setup an MMU entry for the IMMR's address by writing to
> the MD_EPN register (MMU Data Effective Page Number Reg) of the PPC.
What makwes you think this is necessary?
> For an example of how this is done you can refer to the boot code for
> the QS850 (MPC850-based board). The source is located at
> ftp://qslinux.org. Once you uncompress the tarball you can go to
We have PPCBoot (see the CVS server at SourceForge or
ftp://ftp.denx.de/pub/ppcboot) booting on many, many MPC8xx (and
MPC82xx and IBM 40x) systems, but this has never been needed to get
Linux running (not with any kernel from the 2.2.13, 2.2.14 or 2.4.x
series).
Wolfgang Denk
--
Software Engineering: Embedded and Realtime Systems, Embedded Linux
Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd@denx.de
A student of probability soon realizes that by its nature the
billion-to-one chance crops up nine times out of ten, and that the
greatest odds boil down to a double-sided statement: it will happen,
or it will not. - Terry Pratchett, _The Dark Side of the Sun_
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2001-04-11 19:15 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-04-11 16:41 problem when read internal memory Alan Wang
2001-04-11 17:06 ` Daris A Nevil
2001-04-11 19:15 ` Wolfgang Denk [this message]
-- strict thread matches above, loose matches on Subject: below --
2001-04-12 1:39 Alan Wang
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20010411191522.8F36D28417@denx.denx.de \
--to=wd@denx.de \
--cc=dnevil@snmc.com \
--cc=linuxppc-embedded@lists.linuxppc.org \
--cc=wung_y@sina.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).