<html xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii">
<meta name=ProgId content=Word.Document>
<meta name=Generator content="Microsoft Word 10">
<meta name=Originator content="Microsoft Word 10">
<link rel=File-List href="cid:filelist.xml@01C324F0.B81D6130">
<!--[if gte mso 9]><xml>
<o:OfficeDocumentSettings>
<o:DoNotRelyOnCSS/>
</o:OfficeDocumentSettings>
</xml><![endif]--><!--[if gte mso 9]><xml>
<w:WordDocument>
<w:SpellingState>Clean</w:SpellingState>
<w:GrammarState>Clean</w:GrammarState>
<w:DocumentKind>DocumentEmail</w:DocumentKind>
<w:EnvelopeVis/>
<w:Compatibility>
<w:BreakWrappedTables/>
<w:SnapToGridInCell/>
<w:WrapTextWithPunct/>
<w:UseAsianBreakRules/>
</w:Compatibility>
<w:BrowserLevel>MicrosoftInternetExplorer4</w:BrowserLevel>
</w:WordDocument>
</xml><![endif]-->
<style>
<!--
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{mso-style-parent:"";
margin:0in;
margin-bottom:.0001pt;
mso-pagination:widow-orphan;
font-size:12.0pt;
font-family:"Times New Roman";
mso-fareast-font-family:"Times New Roman";}
a:link, span.MsoHyperlink
{color:blue;
text-decoration:underline;
text-underline:single;}
a:visited, span.MsoHyperlinkFollowed
{color:purple;
text-decoration:underline;
text-underline:single;}
span.EmailStyle17
{mso-style-type:personal-compose;
mso-style-noshow:yes;
mso-ansi-font-size:10.0pt;
mso-bidi-font-size:10.0pt;
font-family:Arial;
mso-ascii-font-family:Arial;
mso-hansi-font-family:Arial;
mso-bidi-font-family:Arial;
color:windowtext;}
span.SpellE
{mso-style-name:"";
mso-spl-e:yes;}
span.GramE
{mso-style-name:"";
mso-gram-e:yes;}
@page Section1
{size:8.5in 11.0in;
margin:1.0in 1.25in 1.0in 1.25in;
mso-header-margin:.5in;
mso-footer-margin:.5in;
mso-paper-source:0;}
div.Section1
{page:Section1;}
-->
</style>
<!--[if gte mso 10]>
<style>
/* Style Definitions */
table.MsoNormalTable
{mso-style-name:"Table Normal";
mso-tstyle-rowband-size:0;
mso-tstyle-colband-size:0;
mso-style-noshow:yes;
mso-style-parent:"";
mso-padding-alt:0in 5.4pt 0in 5.4pt;
mso-para-margin:0in;
mso-para-margin-bottom:.0001pt;
mso-pagination:widow-orphan;
font-size:10.0pt;
font-family:"Times New Roman";}
</style>
<![endif]-->
</head>
<body lang=EN-US link=blue vlink=purple style='tab-interval:.5in'>
<div class=Section1>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I have a question for everyone on the list. I am booting
u-boot on a custom mpc824x board (utx8245) and I have run into a minor
annoyance. In <span class=SpellE>start.S</span> you have the following code in <span
class=SpellE>relocate_code</span>:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><span class=SpellE><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>relocate_code</span></font></span><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><span style='mso-tab-count:1'> </span><span
class=SpellE><span class=GramE>mr</span></span><span style='mso-tab-count:1'> </span>r1,<span
style='mso-spacerun:yes'> </span>r3<span style='mso-tab-count:2'> </span>/*
Set new stack pointer<span style='mso-tab-count:2'> </span>*/<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><span style='mso-tab-count:1'> </span><span
class=SpellE><span class=GramE>mr</span></span><span style='mso-tab-count:1'> </span>r9,<span
style='mso-spacerun:yes'> </span>r4<span style='mso-tab-count:2'> </span>/*
Save copy of Global Data pointer<span style='mso-tab-count:1'> </span>*/<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><span style='mso-tab-count:1'> </span><span
class=SpellE><span class=GramE>mr</span></span><span style='mso-tab-count:1'> </span>r10,
r5<span style='mso-tab-count:2'> </span>/*
Save copy of Destination Address<span style='mso-tab-count:1'> </span>*/<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><span style='mso-tab-count:1'> </span><span
class=SpellE><span class=GramE>mr</span></span><span style='mso-tab-count:1'> </span>r3,<span
style='mso-spacerun:yes'> </span>r5<span style='mso-tab-count:4'> </span>/*
Destination Address<span style='mso-tab-count:1'> </span>*/<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>#<span class=SpellE>ifdef</span> DEBUG<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><span style='mso-tab-count:1'> </span><span
class=SpellE><span class=GramE>lis</span></span><span style='mso-tab-count:
1'> </span>r4, <span
class=SpellE>CFG_SDRAM_BASE@h</span><span style='mso-tab-count:2'> </span>/*
Source<span style='mso-spacerun:yes'>
</span>Address<span style='mso-tab-count:1'> </span>*/<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><span style='mso-tab-count:1'> </span><span
class=SpellE><span class=GramE>ori</span></span><span style='mso-tab-count:
1'> </span>r4, r4, <span
class=SpellE>CFG_SDRAM_BASE@l</span><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>#else<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><span style='mso-tab-count:1'> </span><span
class=SpellE><span class=GramE>lis</span></span><span style='mso-tab-count:
1'> </span>r4, <span
class=SpellE>CFG_MONITOR_BASE@h</span><span style='mso-tab-count:2'> </span>/*
Source<span style='mso-spacerun:yes'>
</span>Address<span style='mso-tab-count:1'> </span>*/<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><span style='mso-tab-count:1'> </span><span
class=SpellE><span class=GramE>ori</span></span><span style='mso-tab-count:
1'> </span>r4, r4, <span
class=SpellE>CFG_MONITOR_BASE@l</span><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>#<span class=SpellE>endif</span><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><span style='mso-tab-count:1'> </span><span
class=SpellE><span class=GramE>lis</span></span><span style='mso-tab-count:
1'> </span>r5, <span
class=SpellE>CFG_MONITOR_LEN@h</span><span style='mso-tab-count:2'> </span>/*
Length in Bytes<span style='mso-tab-count:1'> </span>*/<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><span style='mso-tab-count:1'> </span><span
class=SpellE><span class=GramE>ori</span></span><span style='mso-tab-count:
1'> </span>r5, r5, <span
class=SpellE>CFG_MONITOR_LEN@l</span><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><span style='mso-tab-count:1'> </span><span
class=SpellE><span class=GramE>li</span></span><span style='mso-tab-count:1'> </span>r6,
CFG_CACHELINE_SIZE<span style='mso-tab-count:2'> </span>/*
Cache Line Size<span style='mso-tab-count:1'> </span>*/<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><span style='mso-tab-count:1'> </span>/*<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><span style='mso-tab-count:1'> </span><span
style='mso-spacerun:yes'> </span>* Fix GOT pointer:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><span style='mso-tab-count:1'> </span><span
style='mso-spacerun:yes'> </span>*<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><span style='mso-tab-count:1'> </span><span
style='mso-spacerun:yes'> </span>* New GOT-PTR = (old GOT-PTR -
CFG_MONITOR_BASE) + Destination Address<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><span style='mso-tab-count:1'> </span><span
style='mso-spacerun:yes'> </span>*<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><span style='mso-tab-count:1'> </span><span
style='mso-spacerun:yes'> </span>* Offset:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Now I am curious why when you are running in debug mode you
choose to copy everything from CFG_SDRAM_BASE, while working normally you copy
it from CFG_MONITOR_BASE. For us there is nothing to be copied at
CFG_SDRAM_BASE and u-boot crashes right after it relocates the code and jumps
to the copied point. We get around this obviously by doing the following:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><span class=SpellE><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>relocate_code</span></font></span><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><span style='mso-tab-count:1'> </span><span
class=SpellE><span class=GramE>mr</span></span><span style='mso-tab-count:1'> </span>r1,<span
style='mso-spacerun:yes'> </span>r3<span style='mso-tab-count:2'> </span>/*
Set new stack pointer<span style='mso-tab-count:2'> </span>*/<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><span style='mso-tab-count:1'> </span><span
class=SpellE><span class=GramE>mr</span></span><span style='mso-tab-count:1'> </span>r9,<span
style='mso-spacerun:yes'> </span>r4<span style='mso-tab-count:2'> </span>/*
Save copy of Global Data pointer<span style='mso-tab-count:1'> </span>*/<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><span style='mso-tab-count:1'> </span><span
class=SpellE><span class=GramE>mr</span></span><span style='mso-tab-count:1'> </span>r10,
r5<span style='mso-tab-count:2'> </span>/*
Save copy of Destination Address<span style='mso-tab-count:1'> </span>*/<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><span style='mso-tab-count:1'> </span><span
class=SpellE><span class=GramE>mr</span></span><span style='mso-tab-count:1'> </span>r3,<span
style='mso-spacerun:yes'> </span>r5<span style='mso-tab-count:4'> </span>/*
Destination Address<span style='mso-tab-count:1'> </span>*/<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>#<span class=SpellE>ifdef</span> DEBUG<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><span style='mso-tab-count:1'> </span><span
class=SpellE><span class=GramE>lis</span></span><span style='mso-tab-count:
1'> </span>r4, <span
class=SpellE>CFG_MONITOR_BASE@h</span><span style='mso-tab-count:2'> </span>/*
Source<span style='mso-spacerun:yes'>
</span>Address<span style='mso-tab-count:1'> </span>*/<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><span style='mso-tab-count:1'> </span><span
class=SpellE><span class=GramE>ori</span></span><span style='mso-tab-count:
1'> </span>r4, r4, <span
class=SpellE>CFG_MONITOR_BASE@l</span><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>#else<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><span style='mso-tab-count:1'> </span><span
class=SpellE><span class=GramE>lis</span></span><span style='mso-tab-count:
1'> </span>r4, <span
class=SpellE>CFG_MONITOR_BASE@h</span><span style='mso-tab-count:2'> </span>/*
Source<span style='mso-spacerun:yes'>
</span>Address<span style='mso-tab-count:1'> </span>*/<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><span style='mso-tab-count:1'> </span><span
class=SpellE><span class=GramE>ori</span></span><span style='mso-tab-count:
1'> </span>r4, r4, <span
class=SpellE>CFG_MONITOR_BASE@l</span><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>#<span class=SpellE>endif</span><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><span style='mso-tab-count:1'> </span><span
class=SpellE><span class=GramE>lis</span></span><span style='mso-tab-count:
1'> </span>r5, <span
class=SpellE>CFG_MONITOR_LEN@h</span><span style='mso-tab-count:2'> </span>/*
Length in Bytes<span style='mso-tab-count:1'> </span>*/<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><span style='mso-tab-count:1'> </span><span
class=SpellE><span class=GramE>ori</span></span><span style='mso-tab-count:
1'> </span>r5, r5, <span
class=SpellE>CFG_MONITOR_LEN@l</span><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><span style='mso-tab-count:1'> </span><span
class=SpellE><span class=GramE>li</span></span><span style='mso-tab-count:1'> </span>r6,
CFG_CACHELINE_SIZE<span style='mso-tab-count:2'> </span>/*
Cache Line Size<span style='mso-tab-count:1'> </span>*/<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><span style='mso-tab-count:1'> </span>/*<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><span style='mso-tab-count:1'> </span><span
style='mso-spacerun:yes'> </span>* Fix GOT pointer:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><span style='mso-tab-count:1'> </span><span
style='mso-spacerun:yes'> </span>*<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><span style='mso-tab-count:1'> </span><span
style='mso-spacerun:yes'> </span>* New GOT-PTR = (old GOT-PTR -
CFG_MONITOR_BASE) + Destination Address<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><span style='mso-tab-count:1'> </span><span
style='mso-spacerun:yes'> </span>*<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><span style='mso-tab-count:1'> </span><span
style='mso-spacerun:yes'> </span>* Offset:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>This is a hack, and it cannot be merged back into u-boot so
I was wondering if there was a more eloquent way to do this, something else I
am missing that will make my program work while in debug mode with an
unmodified start.S.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Thanks for your time,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Matthew<o:p></o:p></span></font></p>
</div>
</body>
</html>