Re: Starting TZ_VMM on imx6

[Swaminathan R. <swa...@gm...>]

Hello Stefan,

Thank you very much for your response. I will work on the CSU
implementation for imx6 from the Security Reference manual and let you know
how it progresses


--
Best regards,
Swaminathan Ramesh

On Wed, Dec 10, 2014 at 2:30 PM, Stefan Kalkowski <
ste...@ge...> wrote:

> Hi,
>
> On 12/10/2014 07:07 AM, Swaminathan Ramesh wrote:
> > Hello all,
> >
> > I am currently working on TZ_VMM on the imx6 platform. Though the
> > majority of the code is extremely similar to the imx53 port that is
> > already present, there is a problem that arises due to the TrustZone
> > Protection Controller for imx6.
> >
> > The address for the TZPC for imx6 is different from the TZPC of imx53
> > and the Versatile Express ports that already exist in Genode, so these
> > addresses do not work when I used them.
>
> Well, the i.MX53 has no ARM TrustZone protection controller (TZPC) in
> contrast to the Versatile Express board at all. It has a central
> security unit (CSU) instead, which is a component developed by
> Freescale. It works completely different from the TZPC, although it
> fulfills similar functions.
>
> >
> > The TZPC base address for imx6 is not provided in the Freescale
> > documentation or on the ARM infocenter. I was wondering if you guys can
> > give me any ideas on how to go about solving this issue.
>
> The base address is not given due to the absent of that device in i.MX6
> processors. A look at the reference manual reveals that it uses the CSU
> too (base address: 0x021C0000). The ARM infocenter will never help you
> with regard to the memory map of a Freescale SoC.
>
> By the way, don't expect the CSU code present in Genode for the i.MX53
> to work on the i.MX6 without modifications!! It will not work. The CSU
> logic will be the same, but what device is controlled by which CSU
> register is completely dependent on the SoC integration. You have to
> consider the Security Reference Manual for i.MX6:
>
>
>
> https://www.freescale.com/webapp/Download?colCode=IMX6DQ6SDLSRM&appType=moderatedWithoutFAE&fasp=1&WT_TYPE=Reference%20Manuals&WT_VENDOR=FREESCALE&WT_FILE_FORMAT=pdf&WT_ASSET=Documentation&fileExt=.pdf&Parent_nodeId=1337694700967726419044&Parent_pageType=product
>
> Regards
> Stefan
>
> >
> > Thanks,
> >
> > --
> > Best regards,
> > Swaminathan Ramesh
> >
> >
> >
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> --
> Stefan Kalkowski
> Genode Labs
>
> http://www.genode-labs.com/ · http://genode.org/
>
>
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