Errors in PSIM

Binkowski, Cassio cassioiks at gmail.com
Sun May 5 18:45:57 UTC 2013 

Thanks Joel.

I have modified it to be with 32 MB of RAM.

/openprom/options/oea-memory-size 33554432

Right now my doubt is the following:

>From psim.in or other resources, how can I know at which address I can
start creating the partitions and make sure it won't give me an 'unmapped
address' error again?

Thanks.


On Thu, May 2, 2013 at 12:06 PM, Joel Sherrill <joel.sherrill at oarcorp.com>wrote:

>  I don't know where this all ended yesterday.
>
>
> On 5/1/2013 9:00 PM, Binkowski, Cassio wrote:
>
> I know I'm missing out on something. It's probably because of the memory
> addresses and maybe a custom config is required on that file mentioned by
> Joel (
> http://git.rtems.org/rtems/tree/c/src/lib/libbsp/powerpc/psim/startup/linkcmds).
> I have never dealt with this before and will need some assistance.
>
>  You could modify the device tree created by psim/psim-gdb to add
> more RAM or a second bank of RAM after the first 16 MB that the
> linkcmds knows about.  This is in psim.in:
>
> /openprom/options/oea-memory-size 16777216
>
> The bottom line is that you are reading the mpc5200 PowerPC manual for
> addresses and that does not have any correlation to the memory map of
> the "psim board" as defined by the device-tree.
>
> 0x10000 is 64k which is in use by the program or RTEMS.
> 0x100000 is 1MB and is also in use by the program or RTEMS.
> 0x1000000 is outside the memory map.
>
> --joel
>
>
> On Wed, May 1, 2013 at 10:35 PM, Binkowski, Cassio <cassioiks at gmail.com>wrote:
>
>> That may be one solution.
>>
>>  @Joel: Thank you so much for the detailed explanation.
>> One thing that would be great is that if we could somehow condense all
>> this information exchanged in the mailing list into the
>> Wiki/Manuals/Doxygen.
>>
>>  For example, I am now getting another exception, I'm just pasting some
>> of it, because it's huge:
>>
>>  *Suspending faulting task (0x0A010003)*
>> *Exception handler called for exception 7 (0x7)*
>>  *Too many stack frames (stack possibly corrupted), giving up...*
>> *Suspending faulting task (0x0A010004)*
>>  *
>> *
>> It's given at the creation of the 7th partition when function *
>> _API_extensions_Run_postswitch()* is executed.
>>
>>  How can I start searching for it? I don't know what to look for inside
>> inter.h.
>>
>>  Best regards
>>  Cassio
>>
>>
>>
>>  On Wed, May 1, 2013 at 10:18 PM, Gedare Bloom <gedare at gwmail.gwu.edu>wrote:
>>
>>> You tell the partitions where to start, so just give the second
>>> partition the right address. You have to be sure the memory you use is
>>> available both in the hw as real memory and also not used for other
>>> purposes. Probably you can malloc all the memory you need at startup time
>>> and pass pointers into the allocated buffer to partition create.
>>> -Gedare
>>>  On May 1, 2013 7:07 PM, "Binkowski, Cassio" <cassioiks at gmail.com>
>>> wrote:
>>>
>>>>  Hmmm. The 'Testing Task' does not have a while(1) loop and I'm not
>>>> deleting it. Could that be it? *<- Yup, that's it. Just tested. Can
>>>> you please explain how did you arrive at this conclusion?*
>>>>
>>>>  I'm referring to the MPC5200B board. You can see the manual in the
>>>> following link:
>>>> http://www.freescale.com/files/32bit/doc/ref_manual/MPC5200BUM.pdf
>>>>
>>>>  Now, mentioning the partitions and memory addresses. I'm not quite
>>>> sure if I'm incrementing addresses correctly. I do want to create a
>>>> partition right next where the other one finishes.
>>>> So, if starting address is 0x10000, the next partition will start at
>>>> 0x10000 + previousPartitionSize.
>>>> Does this make sense?
>>>>
>>>>  Thanks.
>>>>
>>>>
>>>>
>>>> On Wed, May 1, 2013 at 7:49 PM, Joel Sherrill <
>>>> Joel.Sherrill at oarcorp.com> wrote:
>>>>
>>>>>  It could be another task exiting. You mentioned loading code.
>>>>>
>>>>> Psim is a specific simulated hardware environment and does not as configured match any board. If you got addresses from a piece of real hardware, the addresses will not match. What target board's manual are you reading?
>>>>>
>>>>> "Binkowski, Cassio" <cassioiks at gmail.com> wrote:
>>>>>
>>>>>
>>>>>   Ok.
>>>>>
>>>>>  1) The Init task is already deleting itself after loading the other
>>>>> tasks. Do I have to do something else?
>>>>>
>>>>>  2) The memory for partitions came from the board data sheet. I based
>>>>> myself on the addresses mentioned there and followed upon. I was creating
>>>>> the first one starting at 0x10000 and incrementing from that according to
>>>>> each partition's size.
>>>>>
>>>>>  Can you help me set these 2 things up? I'm not really sure how to
>>>>> deal with that memory issue and the internal error as well.
>>>>>
>>>>>
>>>>> On Wed, May 1, 2013 at 6:18 PM, Joel Sherrill <
>>>>> Joel.Sherrill at oarcorp.com> wrote:
>>>>>
>>>>>>  That address is invalid for psim. Where does the partition memory come from? Here I'd the memory keep for psim
>>>>>> http://git.rtems.org/rtems/tree/c/src/lib/libbsp/powerpc/psim/startup/linkcmds
>>>>>>
>>>>>> "Binkowski, Cassio" <cassioiks at gmail.com> wrote:
>>>>>>
>>>>>>
>>>>>>  I'm also getting the following error when I uncomment the function
>>>>>> that creates 10 partitions to be used by my application:
>>>>>>
>>>>>>  *core_find_mapping() - access to unmaped address, attach a default
>>>>>> map to handle this - addr=0x1000d2c nr_bytes=0x4 processor=0xa8e5000
>>>>>> cia=0x1028c*
>>>>>>  *
>>>>>> *
>>>>>> Can you please help?
>>>>>>
>>>>>>
>>>>>> On Wed, May 1, 2013 at 5:44 PM, Binkowski, Cassio <
>>>>>> cassioiks at gmail.com> wrote:
>>>>>>
>>>>>>> The file 'events.c' is inside /gdb-7.5.1/sim/ppc.
>>>>>>>
>>>>>>>  I am using psim-gdb testing my own application, it's not an RTEMS
>>>>>>> example.
>>>>>>>
>>>>>>>  I managed to break right on it, and it stops at:
>>>>>>> ../../../../../../rtems/c/src/../../cpukit/score/src/interr.c:58
>>>>>>>
>>>>>>>  Signature is the following:
>>>>>>>  the_source=the_source at entry=INTERNAL_ERROR_CORE,
>>>>>>> is_internal=is_internal at entry=true,
>>>>>>>     the_error=the_error at entry=5)
>>>>>>>
>>>>>>>  I have no clue of what it can be. Do you have any idea?
>>>>>>>
>>>>>>>
>>>>>>> On Wed, May 1, 2013 at 5:37 PM, Joel Sherrill <
>>>>>>> Joel.Sherrill at oarcorp.com> wrote:
>>>>>>>
>>>>>>>>  Where is the file events.c?
>>>>>>>>
>>>>>>>> Break at the fault handler printing that.
>>>>>>>>
>>>>>>>> Does this happen with any rtems provided examples?
>>>>>>>>
>>>>>>>> Are you using the psim or psim-gdb script to run it?
>>>>>>>>
>>>>>>>> "Binkowski, Cassio" <cassioiks at gmail.com> wrote:
>>>>>>>>
>>>>>>>>
>>>>>>>>   Hi everyone,
>>>>>>>>
>>>>>>>>  I was just testing my application using PSIM and it is returning
>>>>>>>> the following lines, right after starting a Task:
>>>>>>>>
>>>>>>>>  *rtems-4.10.99.0(PowerPC/Generic (classic FPU)/psim) PANIC ERROR 5
>>>>>>>> *
>>>>>>>> *events.c:404: assertion failed - events->time_from_event > 0*
>>>>>>>>
>>>>>>>>  Has anybody experienced this before?
>>>>>>>>
>>>>>>>>  Thanks.
>>>>>>>> Cassio
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>>
>>>>
>>>>  _______________________________________________
>>>> rtems-users mailing list
>>>> rtems-users at rtems.org
>>>> http://www.rtems.org/mailman/listinfo/rtems-users
>>>>
>>>>
>>
>
>
> --
> Joel Sherrill, Ph.D.             Director of Research & Development joel.sherrill at OARcorp.com        On-Line Applications Research
> Ask me about RTEMS: a free RTOS  Huntsville AL 35805
> Support Available                (256) 722-9985
>
>
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