Errors in PSIM

Binkowski, Cassio cassioiks at gmail.com
Mon May 6 01:01:27 UTC 2013 

Hi Gedare,

Can you please explain where/how in linkcmds I should be touching and how
to let the bps know about the change?
I'm very new to this.

Also, how do I calculate how much space RTEMS is taking so I know the
address to start creating the partitions?

Thanks!


On Sun, May 5, 2013 at 9:40 PM, Gedare Bloom <gedare at gwmail.gwu.edu> wrote:

> You probably need to modify the bsp linkcmds file, or just malloc a large
> chunk. The bsp may need to know about the extra memory in either case, so
> check out the linkcmds.
> -Gedare
> On May 5, 2013 2:46 PM, "Binkowski, Cassio" <cassioiks at gmail.com> wrote:
>
>> 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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