<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type">
</head>
<body bgcolor="#ffffff" text="#000000">
lokowich wrote:
<blockquote cite="mid46A0D76E.4030101@acdstar.com" type="cite">
<meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type">
<font face="Verdana">We're working on bringing up a MPC5200B version
of
our original MPC5200 board using U-Boot 1.1.4 configured for
Icecube/Lite5200B. Other than the CPU, the board is identical. The
bootloader crashes just after relocation to RAM, often with a Program
Check Exception, typically a memory corruption issue. I noticed
failures at different stages after relocation based on content,
suggesting problems with upper SDRAM. If I force the initram to 1/2
the determined size (64MB instead of 128MB), then everything works well
through kernel load and initialization. We've added termination
resistors to improve AD signals, to no avail. Memory tests work fine
too. Any help is appreciated.<br>
</font></blockquote>
Review MPC5200B errata data sheets. I found a BDI2000 + RS232 console
port most useful for turning on a new design. Even<br>
the exercise of BDI commands to tftp load/verify, memory write/verify,
debugging u-boot to run out of ram, with & w/o cache <br>
turned on can be enlightening.<br>
<pre><em><b><i><font color="black" face="Times New Roman" size="3"><span
style="font-weight: bold; font-size: 12pt;">Frank Bennett
President</span></font></i></b></em></pre>
<pre><font color="black" face="Courier New" size="2"><span
style="font-size: 10pt;">Mathegraphics,LLC</span></font><font
color="black" face="Courier New" size="2"><span
style="font-size: 10pt;">
613 Bentley Pl</span></font><font color="black" face="Courier New"
size="2"><span style="font-size: 10pt;">
Fort Collins</span></font>,CO 80526<font color="black"
face="Courier New" size="2"><span style="font-size: 10pt;">
<a onclick="return top.js.OpenExtLink(window,event,this)"
href="http://www.mathegraphics.com/" target="_blank">www.mathegraphics.com</a></span></font><u><font
color="black" face="Courier New" size="2"><span
style="font-size: 10pt;">
</span></font></u></pre>
<blockquote cite="mid46A0D76E.4030101@acdstar.com" type="cite"><font
face="Verdana"><br>
Thanks,<br>
Mark Lokowich<br>
Systems Engineer<br>
Advanced Communication Design<br>
7901 12th Ave. So.<br>
Bloomington, MN 55425<br>
952-854-4000<br>
<a class="moz-txt-link-abbreviated" href="mailto:lokowich@acdstar.com">lokowich@acdstar.com</a><br>
</font>
<pre>This email was Anti Virus checked by Astaro Security Gateway. <a class="moz-txt-link-freetext" href="http://www.astaro.com">http://www.astaro.com</a></pre>
<pre wrap="">
<hr size="4" width="90%">
_______________________________________________
Linuxppc-embedded mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Linuxppc-embedded@ozlabs.org">Linuxppc-embedded@ozlabs.org</a>
<a class="moz-txt-link-freetext" href="https://ozlabs.org/mailman/listinfo/linuxppc-embedded">https://ozlabs.org/mailman/listinfo/linuxppc-embedded</a></pre>
</blockquote>
<br>
</body>
</html>