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
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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 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
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