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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Dear <st1:City w:st="on"><st1:place w:st="on">Nancy</st1:place></st1:City>
& “the list”:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I have a similar problem to solve with a
PPC8241 board which currently has 2Mbyte NOR flash and 128Mbyte of NAND flash.
Let me tell you how far I have gotten and maybe someone else can offer some
suggestions for both of us.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>In looking at u-boot, I can see in some
jffs2 support in common/cmd_jffs2.c and fs/jffs2 and it looks like u-boot can
be configured to boot a kernel in cramfs or jffs2. So based on that, I am
assuming that getting the kernel onto an mtdblock partition as jffs2 should
allow u-boot to boot the kernel from NAND flash instead of its current NOR
flash. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I am currently studying the code trying to
figure out how to configure this scenario.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Perhaps someone else can come in with a
few suggestions for both of us.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Charles<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
u-boot-users-bounces@lists.sourceforge.net
[mailto:u-boot-users-bounces@lists.sourceforge.net] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Nancy Isaac<br>
<b><span style='font-weight:bold'>Sent:</span></b> Thursday, November 02, 2006
12:13 PM<br>
<b><span style='font-weight:bold'>To:</span></b>
u-boot-users@lists.sourceforge.net<br>
<b><span style='font-weight:bold'>Subject:</span></b> [U-Boot-Users] How to use
u-boot to load kernel and file system toone partition in NAND</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I am trying to see if u-boot allows to have a single
partition for both kernel and file system in NAND Flash.</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Currently, we have one 4M partition for kernel and the rest
of the NAND flash for file system.</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>But, I am looking for possible ways of upgrading the kernel
in the field. </span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Currently, I am looking at two possible approaches:</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>1. add an extra partition in the NAND flash and keep the
second kernel in there and have some way in u-boot to decide which one to load.</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>2. if u-boot allows, have one single partition for both
kernel and file system and upload both kernel images and have a soft link to a
kernel image.</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I can't find a way to do the second option above, but that
would be ideal for field upgrade. Has anyone tried either of these
approaches or have any other idea of how to do this? I am new to using u-boot
and linux.</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Thanks</span></font><o:p></o:p></p>
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