Access to first 0x1000 byte on imx53/imx6

[Sascha Hauer]

On Fri, Jan 30, 2015 at 07:51:19PM +0100, Robert Jarzmik wrote:
> Sascha Hauer <s.hauer at pengutronix.de> writes:
> 
> > On Thu, Jan 29, 2015 at 08:25:54PM +0100, Robert Jarzmik wrote:
> >> Sascha Hauer <s.hauer at 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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