From: Robert Jarzmik <robert.jarzmik@free.fr>
To: Sascha Hauer <s.hauer@pengutronix.de>
Cc: barebox@lists.infradead.org
Subject: Re: Access to first 0x1000 byte on imx53/imx6
Date: Thu, 29 Jan 2015 20:25:54 +0100 [thread overview]
Message-ID: <87k305o0cd.fsf@free.fr> (raw)
In-Reply-To: <20150129092151.GE12209@pengutronix.de> (Sascha Hauer's message of "Thu, 29 Jan 2015 10:21:51 +0100")
Sascha Hauer <s.hauer@pengutronix.de> writes:
> On Thu, Jan 29, 2015 at 10:12:46AM +0100, Wjatscheslaw Stoljarski wrote:
>> Hello,
>>
>> If I try to read from first 4k RAM on imx53/imx6, with md or from code,
>> barebox show stacktrace with mesage:
>> "unable to handle NULL pointer dereference at address 0x...".
>> Is it possible in some way do that?
>
> The only way I know is to disable CONFIG_MMU in the config.
I think the solution in arch/arm/boards/mioa701/board.c (remapping the 0x0
address) should work here :
docg3_iospace = map_io_sections(0x0, (void *)0xe0000000, 0x2000);
Cheers.
--
Robert
_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox
next prev parent reply other threads:[~2015-01-29 19:26 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-29 9:12 Access to first 0x1000 byte on imx53/imx6 Wjatscheslaw Stoljarski
2015-01-29 9:21 ` Sascha Hauer
2015-01-29 19:25 ` Robert Jarzmik [this message]
2015-01-30 7:40 ` Sascha Hauer
2015-01-30 9:58 ` Jan Lübbe
2015-01-30 18:51 ` Robert Jarzmik
2015-02-02 9:14 ` Sascha Hauer
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=87k305o0cd.fsf@free.fr \
--to=robert.jarzmik@free.fr \
--cc=barebox@lists.infradead.org \
--cc=s.hauer@pengutronix.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.