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Things never work out the way they should. These pages are a collection
of acquired knowledge about things that go wrong, and how to fix them. It
is broken up into several sections.
Very little here yet[1], if you have
something to add then please let me know!
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Q: |
I've build the kernel, build the mbvanilla target, and
configured my FPGA board, but I'm unable to connect with XMD.
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A: |
If you are using the Insight Virtex2 system board, make sure
that DIP switch 1 is in the on (up) position. Otherwise, you are
holding the MicroBlaze in reset and XMD will never be able to connect. |
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Q: |
I upload image.elf file, but then when I boot the board
it says "Unable to mount root filesystem".
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A: |
This is a problem with the ELF loader built into XMD.
The solution is to use the image.bin file instead, and upload it in XMD with
the command
dow -data image.bin 0x80000000
or whatever kernel link address you have.
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Q: |
I try to build the kernel but I get the error "In
function `__xchg': /home/uClinux-dist/linux-2.4.x/include/asm/system.h:108:
unknown register name `r12' in `asm'
make[1]: Leaving directory `/home/uClinux-dist/user'
make: *** [subdirs] Error 1 |
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A: |
This problem arises when trying to build uClinux under
RedHat7.x. Upgrade to RH 8.0 or greater. If that is impossible,
install gcc 3.2 on your existing system. |
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Q: |
When the kernel boots, I get the error "Warning: Unable
to open initial console" |
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A: |
Greg Ungerer writes: The most common cause of this problem
is using an old version of genromfs (or even just having an old version
first in your PATH). Older version did not support the inline creation of
device nodes from file names starting with "@".
So, use the command "which genromfs" to make sure that you are executing
the genromfs that is distributed with the MicroBlaze gcc tools. |
[1] I
boycott the expression "Under Construction", and so should you! You
will not find any animated bulldozers on this web site!
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Last updated
08-May-2006
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© 2003-2006 John Williams unless otherwise stated
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