Re: Queston about Walnut

["Jacky Lam" <jackylam@astri.org>]

----- Original Message -----
From: "Jacky Lam" <jackylam@astri.org>
To: "Wolfgang Denk" <wd@denx.de>
Cc: <linuxppc-embedded@lists.linuxppc.org>
Sent: Friday, October 03, 2003 12:11 PM
Subject: Re: Queston about Walnut


>
>         I trace the code in kernel and I found some strange behaviors.
>         In the first case (using walnut_config provided in kernel source),
> kernel hangs at mapin_ram();
>         However, if I turn off all unnecssary options and leave only
serial
> console, my kernel can run until init/main.c: kmem_cache_init();

        Sorry, it should be sti() just after kmem_cache_init()  instead.
>
>         As both hangs in memory related function, I tried to run a memory
> test on my board in u-boot. But it hangs.
>
>         => mtest 0 3ffffff
>         Pattern 00000000  Writing...
>         <hangs>
>
>     I tried smaller range (ffffff), it still hangs.
>
>     I am sure my board's memory is in good condition because VxWorks can
run
> very well on it. Have any idea? Thanks.
>
> Best regards,
> Jacky
>
>
>
>
>
> ----- Original Message -----
> From: "Wolfgang Denk" <wd@denx.de>
> To: "Jacky Lam" <jackylam@astri.org>
> Cc: <linuxppc-embedded@lists.linuxppc.org>
> Sent: Thursday, October 02, 2003 8:17 PM
> Subject: Re: Queston about Walnut
>
>
> >
> > In message <000e01c388dc$eb525510$0202a8c0@homevl9biy3v7e> you wrote:
> > >
> > > > Who gave you such (obviously wrong) instructions?
> > >
> > >         I take the example of u-boot to create the "uImage" and
download
> it
> > > to the board.
> >
> > Please show me which U-Boot document uses 0x00400000 as load or entry
> > point address so I can fix this immediately. It is WRONG  and  CANNOT
> > work.
> >
> > > > For PowerPC systems, both  Load  Address  and  Entry  Point  must
be
> > > > specified as 0.
> > >
> > >         I have tried 0 before. But I get an exception in return. Could
> you
> > > kindly give me some instructions how to run a kernel on this board?
> >
> > Please start by giving a precise description of  what  you  did.  and
> > which error messages you got.
> >
> > You "get an exception" - when? When running "mkimage"?  When  booting
> > the kernel? Which sort of exception? What is the exact error message?
> > Please include a complete log of your actions and all output.
> >
> > Best regards,
> >
> > Wolfgang Denk
> >
> > --
> > Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
> > Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd@denx.de
> > Totally illogical, there was no chance.
> > -- Spock, "The Galileo Seven", stardate 2822.3
> >
>
>


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