<br><font size=2 face="sans-serif">Thanks for your answer Joel.</font>
<br>
<br><font size=2 face="sans-serif">We are using the 4.6 version of RTEMS
so I guess the memory must be cleared.</font>
<br>
<br><font size=2 face="sans-serif">I already use a customized linkcmds
file in this application, to specify various sections and other stuff.</font>
<br>
<br><font size=2 face="sans-serif">Thats what I modified for my RAM size
:</font>
<br>
<br><font size=2 face="Courier New">RAM_SIZE = 2M ;</font>
<br>
<br><font size=2 face="Courier New">EEPROM_SIZe = 512K ;</font>
<br>
<br><font size=2 face="Courier New">PROM_SIZE =
64K ;</font>
<br>
<br><font size=2 face="Courier New">RAM_END = RAM_START + RAM_SIZE;</font>
<br>
<br><font size=2 face="Courier New">MEMORY</font>
<br><font size=2 face="Courier New">{</font>
<br><font size=2 face="Courier New"> rom : ORIGIN =
0x00000000, LENGTH = 64K</font>
<br><font size=2 face="Courier New"> ram : ORIGIN =
0x40000000, LENGTH = 2M</font>
<br><font size=2 face="Courier New"> eeprom : ORIGIN = 0x60000000,
LENGTH = 512K</font>
<br><font size=2 face="Courier New">}</font>
<br>
<br><font size=2 face="sans-serif">></font><tt><font size=2>If you do
not reserve the memory area out of the linkcmds, then<br>
>it is likely to be used for some other purpose and overwritten.</font></tt>
<br>
<br><tt><font size=2>How can I reserve memory ? I tried creating a section
like this :</font></tt>
<br>
<br><font size=2 face="Courier New"> sCCA_Main 0x401E7000: {</font>
<br><font size=2 face="Courier New"> *(sCCA_Main)</font>
<br><font size=2 face="Courier New"> } > ram </font>
<br>
<br><tt><font size=2>then my var in the code looks like this :</font></tt>
<br>
<br><font size=2 face="Courier New">uint32 PkgHW_CCA_main __attribute__
(( section ( </font><font size=2 color=#4200ff face="Courier New">"sCCA_Main"</font><font size=2 face="Courier New">
) ) ) ;</font>
<br>
<br><tt><font size=2>But this does not work, the data I place in 0x401E7000
before starting execution of my RTEMS apps is overwritten by 0.</font></tt>
<br><tt><font size=2>Hope you can help.</font></tt>
<br>
<br><tt><font size=2>Léonard.</font></tt>
<br>
<br>
<br>
<br>
<br>
<table width=100%>
<tr valign=top>
<td width=40%><font size=1 face="sans-serif"><b>Joel Sherrill <joel.sherrill@oarcorp.com></b>
</font>
<p><font size=1 face="sans-serif">09.12.2009 14:16</font>
<td width=59%>
<table width=100%>
<tr valign=top>
<td>
<div align=right><font size=1 face="sans-serif">A</font></div>
<td><font size=1 face="sans-serif">Leonard Bise <leonard.bise@syderal.ch></font>
<tr valign=top>
<td>
<div align=right><font size=1 face="sans-serif">cc</font></div>
<td><font size=1 face="sans-serif">Sebastian Huber <sebastian.huber@embedded-brains.de>,
"rtems-users@rtems.org" <rtems-users@rtems.org></font>
<tr valign=top>
<td>
<div align=right><font size=1 face="sans-serif">Objet</font></div>
<td><font size=1 face="sans-serif">Re: Réf : Re: Init of the memory by
RTEMS</font></table>
<br>
<table>
<tr valign=top>
<td>
<td></table>
<br></table>
<br>
<br>
<br><tt><font size=2>On 12/09/2009 06:41 AM, Leonard Bise wrote:<br>
><br>
> I forgot to mention it.<br>
><br>
> I'm using RTEMS for the LEON2 platform.<br>
><br>
Version?<br>
> Also I'm not too sure how to know the address of the workspace or
heap?<br>
><br>
They are next to each other and the linkcmds and symbol<br>
table from your application should give the information.<br>
<br>
Where did you override the RAM size? The linkcmds<br>
has this:<br>
<br>
MEMORY<br>
{<br>
rom : ORIGIN = 0x00000000, LENGTH = 256M<br>
ram : ORIGIN = 0x40000000, LENGTH = 1024M<br>
}<br>
<br>
And the start.S zeroes out the BSS from "_edata"<br>
to "_end".<br>
<br>
The addresses you mentioned will be part of the<br>
unused memory from after the bss until the end of ram<br>
and since you didn't tell the linkcmds or RTEMS about them,<br>
they will be put in either the Workspace or C Program Heap<br>
and used by something.<br>
<br>
<br>
<br>
--joel<br>
<br>
> Léonard.<br>
><br>
><br>
><br>
> *Sebastian Huber <sebastian.huber@embedded-brains.de>*<br>
><br>
> 09.12.2009 11:31<br>
><br>
> <br>
> A<br>
> Leonard
Bise <leonard.bise@syderal.ch><br>
> cc<br>
> rtems-users@rtems.org<br>
> Objet<br>
> Re:
Init of the memory by RTEMS<br>
><br>
><br>
><br>
> <br>
><br>
><br>
><br>
><br>
><br>
> Hi,<br>
><br>
> which BSP do you use? Is the memory address 0x401E7000 part of the
<br>
> workspace or<br>
> heap?<br>
><br>
> CU<br>
><br>
> -- <br>
> Sebastian Huber, embedded brains GmbH<br>
><br>
> Address : Obere Lagerstr. 30, D-82178 Puchheim, Germany<br>
> Phone : +49 89 18 90 80 79-6<br>
> Fax : +49 89 18 90 80 79-9<br>
> E-Mail : sebastian.huber@embedded-brains.de<br>
> PGP : Public key available on request.<br>
><br>
> Diese Nachricht ist keine geschäftliche Mitteilung im Sinne des EHUG.<br>
><br>
<br>
</font></tt>
<br>