[U-Boot-Users] CodeWarrior U-Boot debug

[Wilson Lo]

Hi,

    Yes, most of debuggers will have a problem
(randomly) if you turn on the cache. And also, you may
check the MMU table if it is correct or not. Although
you can read/ write the memory, it doesn't mean that
the memory can burst.

    If you want to see the code in CW, you need to
re-compile the program with CW compiler to generate a
symbol table. I tried to do it but it failed. Some of
the inline command are not supported by CW and there
are a lot of syntax warning.

Wilson

 --- Jerry Van Baren
<gerald.vanbaren at smiths-aerospace.com> 的郵件內容：>
Sorry, no direct help on CodeWarrior but... stuck in
> the FP exception would 
> tend to indicate a memory, probably a SDRAM,
> problem.  This is a classic 
> problem: SDRAM appears to work, but is misconfigured
> and cache burst 
> reading doesn't work properly.  This causes a lot of
> 0xFFs in the 
> instruction stream and these map into FP
> instructions, causing the FP 
> exception.
> 
> Reading and writing RAM using your CodeWarrior is
> NOT a good test of 
> SDRAM.  Most often you need to do a burst read for
> it to fail.  Burst reads 
> occur (at this point in the game) only when doing an
> instruction fetch with 
> the instruction cache enabled.
> 
> Try running with instruction cache turned off.  If
> it runs slowly but 
> steady :-), you are in the 99% probability it is a
> SDRAM initialization issue.
> 
> gvb
> 
> 
> At 02:25 PM 5/1/2003 -0400, RL at prodrive.nl wrote:
> >Hello,
> >
> >Has anyone of you ever used MetroWerks CodeWarrior
> to debug U-Boot?
> >
> >After I've succesfuly compiled the u-boot ELF and
> binairy I've programmed my
> >flash with the binairy.
> >
> >Next, I've made a CodeWarrior project using the ELF
> file output of the GNU
> >Compiler.
> >
> >I can connect to the PPC and I can view memory, but
> when I break the running
> >process, the cpu is always stuck at address 0x800
> (floating point
> >exception).
> >
> >Also I cannot view the code in CodeWarrior??
> >
> >Can someone help me?
> >
> >Thx Roel
> >
> >
> >
> >
>
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> 
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