From: Peng Fan <van.freenix@gmail.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] MMU Mapping
Date: Fri, 22 Aug 2014 09:27:33 +0800 [thread overview]
Message-ID: <53F69C85.7030801@gmail.com> (raw)
In-Reply-To: <53F5CD78.9030302@denx.de>
Hi,
On 08/21/2014 06:44 PM, Stefano Babic wrote:
> Hi Alexandre,
>
> On 21/08/2014 11:08, Alexandre Delove wrote:
>> Hello
>>
>> I am trying to disable the memory management unit on my sabreLite board, but i don't find what i should do. I also want to change the mapping of the MMU, but i don't know where it is.
>>
>
> MMU is off in U-Boot. It is turned on by kernel. Or what do you mind ?
To ARM, if not defined CONFIG_SYS_DCACHE_OFF, dcache_enable->cache_enable(CR_C)->mmu_setup will enable mmu and build section mapping. U can try #define CONFIG_SYS_DCACHE_OFF if it is an ARM SoC board. mmu related code locates at arch/arm/lib/cache-cp15.c
Regards,
Peng.
>
> Best regards,
> Stefano Babic
>
prev parent reply other threads:[~2014-08-22 1:27 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1147516840.12179908.1408611845402.JavaMail.zimbra@enst.fr>
2014-08-21 9:08 ` [U-Boot] MMU Mapping Alexandre Delove
2014-08-21 10:44 ` Stefano Babic
2014-08-22 1:27 ` Peng Fan [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=53F69C85.7030801@gmail.com \
--to=van.freenix@gmail.com \
--cc=u-boot@lists.denx.de \
/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.