On Wed, Nov 24, 2010 at 7:23 PM, Greg Ungerer <g...@snapgear.com> wrote: > > Hi Philip, > > On 23/11/10 08:27, Philip Nye wrote: >> >> I'm trying to port some applications from an old kernel 2.4.x project to >> an up-to-date kernel 2.6.x build - all running on Coldfire with no MMU. >> >> One of these applications accesses some coldfire IO registers directly >> from userspace and it doesn't seem to be working after the port. >> >> Is it still the case that on a m68knommu system it is possible to simply >> read or write anywhere from userspace? or has some rudimentary >> protection been implemented? > > Which ColdFire part are you using? > > Although the kernel doesn't specifically limit userspace accesses > some ColdFire parts have "System Access Control Units" or similar > mechanisms for limiting/protecting acceses. (I know the 523x parts > have one for example). > > It could just be that this is/was set in the 2.4.x code and is not > set the way you want in the 2.6.x code. > > Regards > Greg > > > ------------------------------------------------------------------------ > Greg Ungerer -- Principal Engineer EMAIL: g...@snapgear.com > SnapGear Group, McAfee PHONE: +61 7 3435 2888 > 8 Gardner Close FAX: +61 7 3217 5323 > Milton, QLD, 4064, Australia WEB: http://www.SnapGear.com > _______________________________________________ > uClinux-dev mailing list > uClinux-dev@uclinux.org > http://mailman.uclinux.org/mailman/listinfo/uclinux-dev > This message was resent by uclinux-dev@uclinux.org > To unsubscribe see: > http://mailman.uclinux.org/mailman/options/uclinux-dev >
It's also possible some new code moved the I/O registers. _______________________________________________ uClinux-dev mailing list uClinux-dev@uclinux.org http://mailman.uclinux.org/mailman/listinfo/uclinux-dev This message was resent by uclinux-dev@uclinux.org To unsubscribe see: http://mailman.uclinux.org/mailman/options/uclinux-dev
