[coreboot] flashrom: Can't mmap memory

Myles Watson mylesgw at gmail.com
Fri Feb 6 04:18:47 CET 2009

> -----Original Message-----
> From: Carl-Daniel Hailfinger [mailto:c-d.hailfinger.devel.2006 at gmx.net]
> Sent: Thursday, February 05, 2009 4:19 PM
> To: Myles Watson
> Cc: Coreboot
> Subject: Re: [coreboot] flashrom: Can't mmap memory
> On 05.02.2009 21:26, Myles Watson wrote:
> > When I boot using the factory BIOS on my s2895 flashrom works.  When I
> > boot with Coreboot, I get the Error:
> >
> > Can't mmap memory using /dev/mem: Operation not permitted
> >
> > It shouldn't be kernel parameters since I'm using the same grub2 entry
> > to boot either way.
> >
> > This sounds a little too familiar, but I can't find a thread where
> > this isn't linked to a newer, more restrictive kernel.
> >
> Could be the memory map passed by cbtable or e820. A diff between dmesg
> for each configuration would probably reveal quite a bit of info.

Good idea.  Tomorrow I'll look at that.  The memory maps are quite
different, but in both cases the ROM is marked uncacheable.


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