<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>
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<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>
</div></div>
</blockquote></div><br></div>
</blockquote></div>
</div></div></blockquote></div><br></div>
</blockquote></div>