From: hmthalib <h.thalib@gmail.com>
To: Rick Brown <rick.brown.3@gmail.com>
Cc: kernelnewbies <kernelnewbies@nl.linux.org>, linux-newbie@vger.kernel.org
Subject: Re: Where is MMU enabled?
Date: Tue, 10 Nov 2009 06:28:25 +0530 [thread overview]
Message-ID: <4AF8BAB1.6040502@gmail.com> (raw)
In-Reply-To: <7783925d0911091002r7ca75de8ia292eaba81e748fe@mail.gmail.com>
Rick Brown wrote:
> Hi List,
>
> I am curious to know where is the MMU turned on in a Linux PPC system
> - is it the u-boot or the linux kernel?
It is Linux. u-boot uses the flat memory system.
Since enabling of MMU shall be
> the point from where the CPU will have to generate virtual addresses -
> I think it should be somewhere in the kernel. The reason is that all
> the addresses that we give on the u-boot command line are physical
> addresses and not virtual, right (Thus implying MMU is not turned
> on?)?
yes. MMU is not turned on in u-boot
compare the data sheet and head_32.S for powerpc arch to know how the
MMU is initialized .
>
> Or is it that kernel always gets the control with MMU on on PPC systems?
>
> How about other architectures?
>
> Thanks,
>
> Rick
>
> --
> To unsubscribe from this list: send an email with
> "unsubscribe kernelnewbies" to ecartis@nl.linux.org
> Please read the FAQ at http://kernelnewbies.org/FAQ
>
>
--
Regards,
Mohamed Thalib H
--
To unsubscribe from this list: send the line "unsubscribe linux-newbie" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.linux-learn.org/faqs
prev parent reply other threads:[~2009-11-10 0:58 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-09 18:02 Where is MMU enabled? Rick Brown
2009-11-10 0:58 ` hmthalib [this message]
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=4AF8BAB1.6040502@gmail.com \
--to=h.thalib@gmail.com \
--cc=hmthalib@gmail.com \
--cc=kernelnewbies@nl.linux.org \
--cc=linux-newbie@vger.kernel.org \
--cc=rick.brown.3@gmail.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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.