<p>You can look for some tutorials on ld scripts. This is an area of rtems that lacks good documentation.</p>
<p>The only way to know what memory you can use outside of rtems is to inspect the linkcmds. In your case though you might be able to just point at the 16 MB base address, since psim bsp does not expect to use that much ram...</p>

<div class="gmail_quote">On May 5, 2013 9:01 PM, "Binkowski, Cassio" <<a href="mailto:cassioiks@gmail.com">cassioiks@gmail.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">Hi Gedare,<div><br></div><div>Can you please explain where/how in <span style="font-family:arial,sans-serif;font-size:13px">linkcmds I should be touching and how to let the </span><font face="arial, sans-serif">bps know about the change?</font></div>


<div><font face="arial, sans-serif">I'm very new to this.</font></div><div><font face="arial, sans-serif"><br></font></div><div><font face="arial, sans-serif">Also, how do I calculate how much space RTEMS is taking so I know the address to start creating the partitions?</font></div>


<div><font face="arial, sans-serif"><br></font></div><div><font face="arial, sans-serif">Thanks!</font></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Sun, May 5, 2013 at 9:40 PM, Gedare Bloom <span dir="ltr"><<a href="mailto:gedare@gwmail.gwu.edu" target="_blank">gedare@gwmail.gwu.edu</a>></span> wrote:<br>


<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><p>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.<span><font color="#888888"><br>



-Gedare</font></span></p><div><div>
<div class="gmail_quote">On May 5, 2013 2:46 PM, "Binkowski, Cassio" <<a href="mailto:cassioiks@gmail.com" target="_blank">cassioiks@gmail.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">



<div dir="ltr">Thanks Joel. <div><br></div><div>I have modified it to be with 32 MB of RAM.</div><div><br></div><div>/openprom/options/oea-memory-size 33554432<br></div><div><br></div><div>Right now my doubt is the following:</div>





<div><br></div><div>From <a href="http://psim.in" target="_blank">psim.in</a> 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?</div>





<div><br></div><div>Thanks.</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Thu, May 2, 2013 at 12:06 PM, Joel Sherrill <span dir="ltr"><<a href="mailto:joel.sherrill@oarcorp.com" target="_blank">joel.sherrill@oarcorp.com</a>></span> wrote:<br>





<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
  
    
  
  <div text="#000000" bgcolor="#FFFFFF">
    <div>I don't know where this all ended
      yesterday.<div><br>
      <br>
      On 5/1/2013 9:00 PM, Binkowski, Cassio wrote:<br>
    </div></div><div>
    <blockquote type="cite">
      <div dir="ltr">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 (<a href="http://git.rtems.org/rtems/tree/c/src/lib/libbsp/powerpc/psim/startup/linkcmds" style="font-family:Tahoma;font-size:10pt;white-space:pre-wrap" target="_blank">http://git.rtems.org/rtems/tree/c/src/lib/libbsp/powerpc/psim/startup/linkcmds</a>).
        I have never dealt with this before and will need some
        assistance.<br>
      </div>
      <div class="gmail_extra"><br>
      </div>
    </blockquote></div>
    You could modify the device tree created by psim/psim-gdb to add <br>
    more RAM or a second bank of RAM after the first 16 MB that the <br>
    linkcmds knows about.  This is in <a href="http://psim.in" target="_blank">psim.in</a>:<br>
    <br>
    /openprom/options/oea-memory-size 16777216<br>
    <br>
    The bottom line is that you are reading the mpc5200 PowerPC manual
    for<br>
    addresses and that does not have any correlation to the memory map
    of<br>
    the "psim board" as defined by the device-tree. <br>
    <br>
    0x10000 is 64k which is in use by the program or RTEMS.<br>
    0x100000 is 1MB and is also in use by the program or RTEMS.<br>
    0x1000000 is outside the memory map.<span><font color="#888888"><br>
    <br>
    --joel</font></span><div><div><br>
    <blockquote type="cite">
      <div class="gmail_extra"><br>
        <div class="gmail_quote">On Wed, May 1, 2013 at 10:35 PM,
          Binkowski, Cassio <span dir="ltr"><<a href="mailto:cassioiks@gmail.com" target="_blank">cassioiks@gmail.com</a>></span> wrote:<br>
          <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
            <div dir="ltr">That may be one solution.
              <div><br>
              </div>
              <div>@Joel: Thank you so much for the detailed
                explanation.</div>
              <div>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.</div>
              <div><br>
              </div>
              <div>For example, I am now getting another exception, I'm
                just pasting some of it, because it's huge:</div>
              <div><br>
              </div>
              <div>
                <div><i>Suspending faulting task (0x0A010003)</i></div>
                <div><i>Exception handler called for exception 7 (0x7)</i></div>
              </div>
              <div>
                <div><i>Too many stack frames (stack possibly
                    corrupted), giving up...</i></div>
                <div><i>Suspending faulting task (0x0A010004)</i></div>
                <div>
                  <i><br>
                  </i></div>
                <div>It's given at the creation of the 7th partition
                  when function <b>_API_extensions_Run_postswitch()</b> is
                  executed.</div>
                <div><br>
                </div>
                <div>How can I start searching for it? I don't know what
                  to look for inside inter.h.</div>
                <div><br>
                </div>
                <div>Best regards</div>
                <span><font color="#888888">
                    <div>Cassio</div>
                  </font></span></div>
              <div><br>
              </div>
            </div>
            <div>
              <div>
                <div class="gmail_extra"><br>
                  <br>
                  <div class="gmail_quote">
                    On Wed, May 1, 2013 at 10:18 PM, Gedare Bloom <span dir="ltr"><<a href="mailto:gedare@gwmail.gwu.edu" target="_blank">gedare@gwmail.gwu.edu</a>></span>
                    wrote:<br>
                    <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                      <p>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.<br>
                        -Gedare</p>
                      <div class="gmail_quote">
                        <div>
                          <div>On May 1, 2013 7:07 PM, "Binkowski,
                            Cassio" <<a href="mailto:cassioiks@gmail.com" target="_blank">cassioiks@gmail.com</a>>
                            wrote:<br type="attribution">
                          </div>
                        </div>
                        <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                          <div>
                            <div>
                              <div dir="ltr">Hmmm. The 'Testing Task'
                                does not have a while(1) loop and I'm
                                not deleting it. Could that be it? <b><-
                                  Yup, that's it. Just tested. Can you
                                  please explain how did you arrive at
                                  this conclusion?</b>
                                <div>
                                  <br>
                                </div>
                                <div>I'm referring to the MPC5200B
                                  board. You can see the manual in the
                                  following link: <a href="http://www.freescale.com/files/32bit/doc/ref_manual/MPC5200BUM.pdf" target="_blank">http://www.freescale.com/files/32bit/doc/ref_manual/MPC5200BUM.pdf</a></div>
                                <div><br>
                                </div>
                                <div>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.</div>
                                <div>So, if starting address is 0x10000,
                                  the next partition will start at
                                  0x10000 + previousPartitionSize.</div>
                                <div>Does this make sense?</div>
                                <div><br>
                                </div>
                                <div>Thanks.</div>
                                <div><br>
                                </div>
                              </div>
                              <div class="gmail_extra"><br>
                                <br>
                                <div class="gmail_quote">On Wed, May 1,
                                  2013 at 7:49 PM, Joel Sherrill <span dir="ltr"><<a href="mailto:Joel.Sherrill@oarcorp.com" target="_blank">Joel.Sherrill@oarcorp.com</a>></span>
                                  wrote:<br>
                                  <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                                    <div>
                                      <pre style="font-size:10.0pt;font-family:Tahoma;word-wrap:break-word">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" <<a href="mailto:cassioiks@gmail.com" target="_blank">cassioiks@gmail.com</a>> wrote:

</pre>
                                      <div>
                                        <div>
                                          <div>
                                            <div dir="ltr">Ok. 
                                              <div><br>
                                              </div>
                                              <div>1) The Init task is
                                                already deleting itself
                                                after loading the other
                                                tasks. Do I have to do
                                                something else?</div>
                                              <div><br>
                                              </div>
                                              <div>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.</div>
                                              <div><br>
                                              </div>
                                              <div>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.</div>
                                              <div class="gmail_extra"><br>
                                                <br>
                                                <div class="gmail_quote">On
                                                  Wed, May 1, 2013 at
                                                  6:18 PM, Joel Sherrill
                                                  <span dir="ltr">
                                                    <<a href="mailto:Joel.Sherrill@oarcorp.com" target="_blank">Joel.Sherrill@oarcorp.com</a>></span>
                                                  wrote:<br>
                                                  <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                                                    <div>
                                                      <pre style="font-size:10.0pt;font-family:Tahoma;word-wrap:break-word">That address is invalid for psim. Where does the partition memory come from? Here I'd the memory keep for psim

<a href="http://git.rtems.org/rtems/tree/c/src/lib/libbsp/powerpc/psim/startup/linkcmds" target="_blank">http://git.rtems.org/rtems/tree/c/src/lib/libbsp/powerpc/psim/startup/linkcmds</a>

"Binkowski, Cassio" <<a href="mailto:cassioiks@gmail.com" target="_blank">cassioiks@gmail.com</a>> wrote:

</pre>
                                                      <div>
                                                        <div>
                                                          <div dir="ltr">I'm
                                                          also getting
                                                          the following
                                                          error when I
                                                          uncomment the
                                                          function that
                                                          creates 10
                                                          partitions to
                                                          be used by my
                                                          application:
                                                          <div><br>
                                                          </div>
                                                          <div><i>core_find_mapping()
                                                          - access to
                                                          unmaped
                                                          address,
                                                          attach a
                                                          default map to
                                                          handle this -
                                                          addr=0x1000d2c
                                                          nr_bytes=0x4
                                                          processor=0xa8e5000
                                                          cia=0x1028c</i><br>
                                                          </div>
                                                          <div><i><br>
                                                          </i></div>
                                                          <div>Can you
                                                          please help?</div>
                                                          </div>
                                                        </div>
                                                        <div>
                                                          <div class="gmail_extra"><br>
                                                          <br>
                                                          <div class="gmail_quote">On
                                                          Wed, May 1,
                                                          2013 at 5:44
                                                          PM, Binkowski,
                                                          Cassio <span dir="ltr">
                                                          <<a href="mailto:cassioiks@gmail.com" target="_blank">cassioiks@gmail.com</a>></span>
                                                          wrote:<br>
                                                          <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                                                          <div dir="ltr">The
                                                          file
                                                          'events.c' is
                                                          inside
                                                          /gdb-7.5.1/sim/ppc.
                                                          <div><br>
                                                          </div>
                                                          <div>I am
                                                          using psim-gdb
                                                          testing my own
                                                          application,
                                                          it's not an
                                                          RTEMS example.</div>
                                                          <div><br>
                                                          </div>
                                                          <div>I managed
                                                          to break right
                                                          on it, and it
                                                          stops at:</div>
                                                          <div>../../../../../../rtems/c/src/../../cpukit/score/src/interr.c:58<br>
                                                          </div>
                                                          <div><br>
                                                          </div>
                                                          <div>Signature
                                                          is the
                                                          following:</div>
                                                          <div>
                                                          <div>the_source=the_source@entry=INTERNAL_ERROR_CORE,
is_internal=is_internal@entry=true, </div>
                                                          <div>   
                                                          the_error=the_error@entry=5)</div>
                                                          <div><br>
                                                          </div>
                                                          <div>I have no
                                                          clue of what
                                                          it can be. Do
                                                          you have any
                                                          idea?</div>
                                                          </div>
                                                          </div>
                                                          <div>
                                                          <div>
                                                          <div class="gmail_extra"><br>
                                                          <br>
                                                          <div class="gmail_quote">On
                                                          Wed, May 1,
                                                          2013 at 5:37
                                                          PM, Joel
                                                          Sherrill <span dir="ltr">
                                                          <<a href="mailto:Joel.Sherrill@oarcorp.com" target="_blank">Joel.Sherrill@oarcorp.com</a>></span>
                                                          wrote:<br>
                                                          <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                                                          <div>
                                                          <pre style="font-size:10.0pt;font-family:Tahoma;word-wrap:break-word">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" <<a href="mailto:cassioiks@gmail.com" target="_blank">cassioiks@gmail.com</a>> wrote:

</pre>
                                                          <div>
                                                          <div>
                                                          <div>
                                                          <div dir="ltr">Hi
                                                          everyone,
                                                          <div><br>
                                                          </div>
                                                          <div>I was
                                                          just testing
                                                          my application
                                                          using PSIM and
                                                          it is
                                                          returning the
                                                          following
                                                          lines, right
                                                          after starting
                                                          a Task:</div>
                                                          <div><br>
                                                          </div>
                                                          <div>
                                                          <div><i>rtems-4.10.99.0(PowerPC/Generic
                                                          (classic
                                                          FPU)/psim)
                                                          PANIC ERROR 5</i></div>
                                                          <div><i>events.c:404:
                                                          assertion
                                                          failed -
                                                          events->time_from_event
                                                          > 0</i></div>
                                                          </div>
                                                          <div><br>
                                                          </div>
                                                          <div>Has
                                                          anybody
                                                          experienced
                                                          this before?</div>
                                                          <div><br>
                                                          </div>
                                                          <div>Thanks.</div>
                                                          <div>Cassio</div>
                                                          </div>
                                                          </div>
                                                          </div>
                                                          </div>
                                                          </div>
                                                          </blockquote>
                                                          </div>
                                                          <br>
                                                          </div>
                                                          </div>
                                                          </div>
                                                          </blockquote>
                                                          </div>
                                                          <br>
                                                          </div>
                                                        </div>
                                                      </div>
                                                    </div>
                                                  </blockquote>
                                                </div>
                                                <br>
                                              </div>
                                            </div>
                                          </div>
                                        </div>
                                      </div>
                                    </div>
                                  </blockquote>
                                </div>
                                <br>
                              </div>
                              <br>
                            </div>
                          </div>
_______________________________________________<br>
                          rtems-users mailing list<br>
                          <a href="mailto:rtems-users@rtems.org" target="_blank">rtems-users@rtems.org</a><br>
                          <a href="http://www.rtems.org/mailman/listinfo/rtems-users" target="_blank">http://www.rtems.org/mailman/listinfo/rtems-users</a><br>
                          <br>
                        </blockquote>
                      </div>
                    </blockquote>
                  </div>
                  <br>
                </div>
              </div>
            </div>
          </blockquote>
        </div>
        <br>
      </div>
    </blockquote>
    <br>
    <br>
    </div></div><div><pre cols="72">-- 
Joel Sherrill, Ph.D.             Director of Research & Development 
<a href="mailto:joel.sherrill@OARcorp.com" target="_blank">joel.sherrill@OARcorp.com</a>        On-Line Applications Research
Ask me about RTEMS: a free RTOS  Huntsville AL 35805 
Support Available                <a href="tel:%28256%29%20722-9985" value="+12567229985" target="_blank">(256) 722-9985</a> </pre>
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