Sorry all, it is the uart settings! Apologise for wasting your time. Thanks, Bob
Sent with AquaMail for Android http://www.aqua-mail.com On November 19, 2013 7:23:47 AM Bob Stewart <[email protected]> wrote: > Thanks Stefan. I did try Norman's suggestion of turning of the MMU after > turning it on, nothing printed on the console. > > Thanks for your help I'll keep digging though the system control settings > to see what I can find. > > Bob > > Sent with AquaMail for Android > http://www.aqua-mail.com > > > On November 19, 2013 4:40:20 AM Stefan Kalkowski > <[email protected]> wrote: > > Hi Bob, > > > > On 11/18/2013 11:20 PM, bob wrote: > > >> I haven't heard back from the TI E2E group, but if the kernel was not > in the Secure state it would not be able to read the Scr register because > it has restricted access. Thanks to Christian reading what I should have > read, the kernel is starting in user mode. Do I have to generate some kind > of excpetion in order to change the mode to a privileged one? How would I > go about getting into a correct mode? > > >> Thanks for all the time you guys have spent responding to me. > > > > I'm afraid, you misunderstood Christian's mail. He just stated, that the > > kernel starts in non-secure mode. It is most likely in supervisor mode, > > and not in user mode ;-) > > > > So I assume the whole TrustZone discussion leads to a dead end. > > Everything is correct if you just set SECURITY_EXTENSION back to zero. > > If set to one, the kernel assumes to run in secure mode on top of a > > TrustZone supported CPU, which obviously isn't the case regarding your > > board. In general, setting the SECURITY_EXTENSION to zero is the safe > > path even if your platform is starting in secure mode. This flag should > > be switched on only, if the base-hw kernel acts as a TrustZone hypervisor. > > > > I strongly advise you to follow Norman's second proposal to first check > > whether you've a working UART. First, I would print something before the > > MMU is enabled, just to ensure you've the right physical addresses used > > to initialize the UART driver. If that works, follow Norman's approach > > to enable, and immediately disable the MMU again, and then print > > something. Just to see, whether the MMU, and the kernel's page-table are > > really the problem. > > > > Regards > > Stefan > > > > -- > > Stefan Kalkowski > > Genode Labs > > > > http://www.genode-labs.com/ ยท http://genode.org/ > > > > > ------------------------------------------------------------------------------ > > Shape the Mobile Experience: Free Subscription > > Software experts and developers: Be at the forefront of tech innovation. > > Intel(R) Software Adrenaline delivers strategic insight and game-changing > conversations that shape the rapidly evolving mobile landscape. Sign up > now. > http://pubads.g.doubleclick.net/gampad/clk?id=63431311&iu=/4140/ostg.clktrk > > _______________________________________________ > > Genode-main mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/genode-main > > > > > ------------------------------------------------------------------------------ > Shape the Mobile Experience: Free Subscription > Software experts and developers: Be at the forefront of tech innovation. > Intel(R) Software Adrenaline delivers strategic insight and game-changing > conversations that shape the rapidly evolving mobile landscape. Sign up > now. > http://pubads.g.doubleclick.net/gampad/clk?id=63431311&iu=/4140/ostg.clktrk > _______________________________________________ > Genode-main mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/genode-main ------------------------------------------------------------------------------ Shape the Mobile Experience: Free Subscription Software experts and developers: Be at the forefront of tech innovation. Intel(R) Software Adrenaline delivers strategic insight and game-changing conversations that shape the rapidly evolving mobile landscape. Sign up now. http://pubads.g.doubleclick.net/gampad/clk?id=63431311&iu=/4140/ostg.clktrk _______________________________________________ Genode-main mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/genode-main
