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Running TrustZone

Andreas Lauber
Note: This was originally posted on 4th January 2013 at http://forums.arm.com

Hallo,

I'm trying to run the TrustZone example from DS-5. And it's working with the RTSM-VE-A9x4. But this is just a simulation, isn't it. Because I do not have to power up DSTREAM and my board.
So I tried some more to run the example on the Xilinx Zynq board which has a ARM Cortex A9 DualCore.

BUT: If I'm using "Debug Cortex_A9_0 via DSTREAM/RVI" from Xilinx-Zynq-7000 EEP ZC702 its not working anymore. I used the connection with a hello world program before so it's defiantly the right connection. I also added

add-symbol-file "${workspace_loc:/TrustZone/normal.axf}" N:0

in execute debugger commands like it is in the RTSM version.
Nevertheless I get the following error if I want to debug the software on the ARM.

ERROR(CMD16-TAD11-NAL22):
! Failed to load "TrustZone-versatile.axf"
! Failed to write 4.872 bytes to address S:0x80000000
! General error on memory or register access.

I know the example was written for versatile express, but its also just a Cortex A9. So where is the difference? What did I forgot to change? I would be happy about some ideas.
Parents
  • Note: This was originally posted on 7th January 2013 at http://forums.arm.com

    Hey ttfn,

    thanks for your help. I know moved the software to the OCM and it looked like it's going to work.
    I could also run the code in the secure mode.
    But unfortunately as soon as I'm swithing in the non-secure mode the software crashs. As far as I see its because the regin of the non-secure software is still marked as secure. So for example I copied the code with the scatter file to 0x18000 and its there but if I have a look at the memory it says S:0x18000. This means I cannot access it from normal world.

    So here comes the question: How can I make the memory from 0x18000 to 0x30000 as non-secure. I don't see any point in the scatter files and startup files.
    But I guess there has to be a way...

    Thx
Reply
  • Note: This was originally posted on 7th January 2013 at http://forums.arm.com

    Hey ttfn,

    thanks for your help. I know moved the software to the OCM and it looked like it's going to work.
    I could also run the code in the secure mode.
    But unfortunately as soon as I'm swithing in the non-secure mode the software crashs. As far as I see its because the regin of the non-secure software is still marked as secure. So for example I copied the code with the scatter file to 0x18000 and its there but if I have a look at the memory it says S:0x18000. This means I cannot access it from normal world.

    So here comes the question: How can I make the memory from 0x18000 to 0x30000 as non-secure. I don't see any point in the scatter files and startup files.
    But I guess there has to be a way...

    Thx
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