From: Sascha Hauer <s.hauer@pengutronix.de>
To: Robert Jarzmik <robert.jarzmik@free.fr>
Cc: barebox@lists.infradead.org
Subject: Re: Access to first 0x1000 byte on imx53/imx6
Date: Mon, 2 Feb 2015 10:14:12 +0100 [thread overview]
Message-ID: <20150202091412.GV12209@pengutronix.de> (raw)
In-Reply-To: <87lhkkm7a0.fsf@free.fr>
On Fri, Jan 30, 2015 at 07:51:19PM +0100, Robert Jarzmik wrote:
> Sascha Hauer <s.hauer@pengutronix.de> writes:
>
> > On Thu, Jan 29, 2015 at 08:25:54PM +0100, Robert Jarzmik wrote:
> >> Sascha Hauer <s.hauer@pengutronix.de> writes:
> >> 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);
> >
> > We could create a /dev/zeropage with the code above. That would make the
> > zero page generally available. I don't know if this is worth the effort
> > though.
>
> Yeah, I don't know if it's worth it either. And how "big" should this
> /dev/zeropage be (4k, 1M, ...) ?
It should be one page, so 4k. But as Jan said, special casing the first
page in /dev/mem sounds better.
Sascha
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prev parent reply other threads:[~2015-02-02 9:14 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
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 [this message]
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