base-hw ,,, What is CACHE_LINE_SIZE_LOG2?

[Bob Stewart]

Sorry all, it is the uart settings! Apologise for wasting your time.

Thanks,
Bob

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On November 19, 2013 7:23:47 AM Bob Stewart <robjsstewart at ...196...> 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
>
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> http://www.aqua-mail.com
>
>
> On November 19, 2013 4:40:20 AM Stefan Kalkowski 
> <stefan.kalkowski at ...1...> 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/ · http://genode.org/
> >
> > 
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