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2285 discussions

Data Abort MMU exception on mapped IO register read
by Bob Stewart 14 Apr '15

14 Apr '15

Hi, I'm running with 15.02, base-hw on a TI AM3359 processor. I've successfully created device drivers for most of the devices on the peripheral bus without issue. Accessing the the final device i need a driver for, is causing me fits. I attached the IO device register space with the usual creation of a Attached_io_mem_dataspace based object which also uses the very useful MMIO utility object. I also tried it without MMIO and just accessed the space through local_addr<void>. When I try to read an address in the mapped space I get an "unknown MMU exception". When I write to the same address no error occurs (I'm assuming for now it's failing silently). Putting PDBG's in the arm thread code shows that the error on the read is is being caused by a DATAT_ABORT. Peeking at the data fault status register (dfsr) shows 0x805 which according the the the ARM7 technical reference manual decodes to a translation table error. The virtual address created when the io device is mapped is 0x81B0_0000 (the load_addr<void>), but I see no section table entry being created for 0x8100_0000. Only one is created at 0x8000_0000. If I'm remembering correctly sections are 16 MB is size for this architecture. I'm instrumenting short_translation_table.h to see what translation table entries are being created. I also don't seen any short translation table entries being created in the 0x81bxx_xxxx region. My platform support code does include the physical address and size for the region containing the device I'm trying to access. The only physical difference with this device and the others I've successfully created drivers for, is that is runs of the L4 interconnection whereas the others were on the L3 interconnect. In this SoC the L4 is bridged to the L3 interconnect and runs at half the speed of the L3 bus. But I doubt that this would make any difference to the mapping of the device. This device is also much higher in memory that the other devices. Any hints at further debugging of this issue would be greatly appreciated. Thanks, Bob Stewart

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Fwd: IOMUX in tz_vmm
by chirag garg 14 Apr '15

14 Apr '15

Hi all, I am trying to set 0 and 1 bit in Gpr9 register in IOMUX for imx6 but when i am running my example on the board it stops as tz_vmm start at the point of iomux initialization. Iomux implementation present at https://github.com/chiragdthinker/genode/blob/hw_sabrelite_tz_support/repos… and in main at line no 54 and 128 https://github.com/chiragdthinker/genode/blob/hw_sabrelite_tz_support/repos… What could be the reason of this failure.? Without initialization of iomux this example works fine. Thanks in advance. Regards Chirag Garg IIT Madras , Rise Lab

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Re: ldso problem on zynq
by Mark Albers 10 Apr '15

10 Apr '15

Hi, I'm working with Genode on zynq hardware together with Johannes. I just tested 'make run/ldso' with try/catch statement commented out. Here's the result: Genode 14.11 int main(): --- create local services --- int main(): --- start init --- int main(): transferred 1020 MB to init int main(): --- init created, waiting for exit condition --- [init -> test-ldso] C++ runtime: Genode::Rm_session::Region_conflict [init -> test-ldso] void* abort(): abort called Regards Mark

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ldso problem on zynq
by Johannes Schlatow 10 Apr '15

10 Apr '15

Hi, as previously mentioned, I'm running Genode on Zynq-based hardware...which is progressing quite well by the way ;-) Unfortunately, I got stuck at using the dynamic linker, i.e. 'make run/ldso' fails with the following output: > Genode 14.11-93-ge5ef216 > int main(): --- create local services --- > int main(): --- start init --- > int main(): transferred 1020 MB to init > int main(): --- init created, waiting for exit condition --- > [init -> test-ldso] LD: Failed to load program > [init] virtual void Genode::Child_policy::exit(int): child "test-ldso" exited with exit value -1 As I'm quite unfamiliar with dynamic linking in general, I have no clue what's wrong here. Also, having a quick look at the corresponding lines in the ldso didn't shed much light on this matter. Thus, I'd be very glad to get a few hints from you guys. Any ideas what I need to check to narrow this down? If you are interested in the zynq-related code, you can find it at: https://github.com/ValiValpas/genode/tree/zynq Cheers Johannes

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RE:Re: how to get the value of REV？
by Lee gary 08 Apr '15

08 Apr '15

Hi Stefan, I follow your guideline to get the REV.but when i prepare_port the port file. It report errors that fatal: reference is not a tree: 6241b87eb37b9cfe7b063f0054732bf2c7686202 how can i to solve it? thanks 2015-03-29 20:46 GMT+08:00 Lee gary <11430erwin@...9...>: > Hi all. > I know the REV(git) in the port file is hash of the current > version.but i don't know how to get the value of REV？ > > Thanks >

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TrustZone: Access in Normal world
by chirag garg 07 Apr '15

07 Apr '15

Hi all I am running Genode 15.02 over the I.MX6 board. I tried to run tz_vmm script to run another Genode kernel image in normal world which running successfully. Also, I am able to switch from Normal world to the secure world and vice-versa. Now I want to access some secure resources from the Normal world to see TrustZone enable features. So i write a small application "switch" with the help of IO_mem_connection and mmio class which access the secure RAM region used by the secure world but nothing happens there it is executing normally in Normal world. What kind of behavior is expected from the Normal world on this access? I am using UART-2 in both the world to print the messages. On the other hand, when i make UART-2 secure in csu.h then normal world doesn't execute at all and DATA ABORT exception occurred. I guess, I have to do some thing with CSU(csu.h) and TZASC (tsc_380.h) to see the TrustZone enable expected behavior. Please, Let me know where i could be wrong or what i can do to proceed further in this direction ? Thanks in advance. Regards Chirag Garg IIT Madras , Rise Lab

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Write to specific memory address
by Vincent Raes 07 Apr '15

07 Apr '15

Hello, I am working with TrustZone using Genode and I am trying to pass data from the secure world to the normal world and vice versa. The problem lies with the fact that the normal world can only access a certain part of the RAM memory the board has to offer so all the data I want to give to the normal world has to be placed somewhere it can access. And I can't seem to figure out how to place data at a specific address using Genode. When I try to use pointers to the wanted memory location, the error "No RM attachment" keeps popping up. This may very well be caused by the fact I am using a pointer to a place that does not yet has a valid data object in it. I believe the correct answer has something to do with the use of dataspaces but am not sure how or what kind of dataspace I need to use for random data I generate myself. Thanks in advance for any advice. Best regards, Vincent

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Genode on QEMU TrustZone
by Mauro Suardi 07 Apr '15

07 Apr '15

Hi! I've read your paper about TrustZone and I'd like to test Genode on the secure side of an architecture with TrustZone on Qemu (I've found on the web a TrustZone QEMU). How can I do it? Thank you! Mauro

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Microkernel Meetup
by Björn Döbel 04 Apr '15

04 Apr '15

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi all, it is time for another Microkernel Meetup! As many regulars seem to be travelling mid/late April, I suggest we go to B'liebig, LiebigstraÃe 24 http://b-liebig.de/ either on April 7 or on April 9. Please participate in the Dudle so I can reserve a table: https://dudle.inf.tu-dresden.de/uks0415/ Also, please distribute this email to anyone you think might be interested in coming. Cheers, Bjoern -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAlUSfX0ACgkQP5ijxgQLUNmsjQCeP07bdeWG7cANxiaT2U1DqT+N 9+EAmQH4tcieJL4S1VAiOkOCJaGQqsJG =XTl6 -----END PGP SIGNATURE-----

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imx53 trustzone boot (Freescale iMX53-QSB)
by Ofer Hasson 30 Mar '15

30 Mar '15

Hello, I'm currently exploring arm trustzone with genode, I managed to run the example and run my own normal world linux kernel. Is there a way to chain load normal world operating system, load another u-boot file in the normal world ? is there a technical problem doing so ? Any input no the subject will be very helpful. Thanks

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