mpc 860 boot linux2.6.23 problem

mpc 860 boot linux2.6.23 problem

[keng_629]

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i am proting linux2.63.23 to mpc860t board with uboot1.1.4 as bootloader.
my bootargs is root=/dev/ram rw init=/linuxrc.
i use debugger to see the regedits, find pc is run in the cpu_idle().
what is wrong with my kernel, plese give me some advice.thank you .


yours keng_629






keng_629
2007-10-15

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Re: mpc 860 boot linux2.6.23 problem

[Scott Wood]

keng_629 wrote:
>  
> i am proting linux2.63.23 to mpc860t board with uboot1.1.4 as bootloader.
> my bootargs is root=/dev/ram rw init=/linuxrc.
> i use debugger to see the regedits, find pc is run in the cpu_idle().
> what is wrong with my kernel, plese give me some advice.thank you .

Posting the same thing over and over again isn't going to change the 
response.  Try head-of-Linus's-git, make sure you're using arch/powerpc, 
and post the device tree you're using.  Without more information, we 
can't help you.

-Scott

Re: mpc 860 boot linux2.6.23 problem

[Wolfgang Denk]

In message <4713A08C.3060204@freescale.com> you wrote:
> keng_629 wrote:
> >  
> > i am proting linux2.63.23 to mpc860t board with uboot1.1.4 as bootloader.
> > my bootargs is root=/dev/ram rw init=/linuxrc.
> > i use debugger to see the regedits, find pc is run in the cpu_idle().
> > what is wrong with my kernel, plese give me some advice.thank you .
> 
> Posting the same thing over and over again isn't going to change the 
> response.  Try head-of-Linus's-git, make sure you're using arch/powerpc, 
> and post the device tree you're using.  Without more information, we 
> can't help you.

Just to point out the obvious: U-Boot 1.1.4 is *way* too old to
support any device-tree based kernel, so the fist step is to update
U-Boot to a somewhat recent version (i. e. 1.3.0-rcX).

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de
"Faith: not *wanting* to know what is true."    - Friedrich Nietzsche

Re: mpc 860 boot linux2.6.23 problem

[Scott Wood]

Wolfgang Denk wrote:
> In message <4713A08C.3060204@freescale.com> you wrote:
>> keng_629 wrote:
>>>  
>>> i am proting linux2.63.23 to mpc860t board with uboot1.1.4 as bootloader.
>>> my bootargs is root=/dev/ram rw init=/linuxrc.
>>> i use debugger to see the regedits, find pc is run in the cpu_idle().
>>> what is wrong with my kernel, plese give me some advice.thank you .
>> Posting the same thing over and over again isn't going to change the 
>> response.  Try head-of-Linus's-git, make sure you're using arch/powerpc, 
>> and post the device tree you're using.  Without more information, we 
>> can't help you.
> 
> Just to point out the obvious: U-Boot 1.1.4 is *way* too old to
> support any device-tree based kernel, so the fist step is to update
> U-Boot to a somewhat recent version (i. e. 1.3.0-rcX).

Upgrading to the latest u-boot certainly shouldn't hurt, but I don't 
think there's any device tree support for 8xx yet, so for now he should 
boot with cuImage.

-Scott

Re: mpc 860 boot linux2.6.23 problem

[Dan Malek]

On Oct 16, 2007, at 12:18 PM, Scott Wood wrote:

> Upgrading to the latest u-boot certainly shouldn't hurt, but I don't
> think there's any device tree support for 8xx yet,

Have you tried it?  Works for me.  In fact, most
of the development you see today was done
by Pantelis on the 8xx.

	-- Dan

Re: mpc 860 boot linux2.6.23 problem

[Scott Wood]

Dan Malek wrote:
> 
> On Oct 16, 2007, at 12:18 PM, Scott Wood wrote:
> 
>> Upgrading to the latest u-boot certainly shouldn't hurt, but I don't
>> think there's any device tree support for 8xx yet,
> 
> Have you tried it?  Works for me.  In fact, most
> of the development you see today was done
> by Pantelis on the 8xx.

I just pulled Wolfgang's latest u-boot tree, and I don't see any fdt or 
ft_ calls in cpu/mpc8xx, nor in any 8xx board that I recognize.

I may have been unclear in that I was talking about device tree support 
in u-boot, not the kernel.  Obviously there's device tree support in the 
kernel, as evidenced by my reference to using cuImage.

-Scott

Re: mpc 860 boot linux2.6.23 problem

[Dan Malek]

On Oct 17, 2007, at 11:31 AM, Scott Wood wrote:

> I just pulled Wolfgang's latest u-boot tree, and I don't see any  
> fdt or ft_ calls in cpu/mpc8xx, nor in any 8xx board that I recognize.

The STx XTc 885 is supported and was used for
a majority of the FT development in u-boot.  I
just built it a few months ago, it worked fine, so
if it isn't working today the changes should be
minimal to bring it up to date.

Thanks.

	-- Dan

Re: mpc 860 boot linux2.6.23 problem

[Scott Wood]

Dan Malek wrote:
> 
> On Oct 17, 2007, at 11:31 AM, Scott Wood wrote:
> 
>> I just pulled Wolfgang's latest u-boot tree, and I don't see any fdt 
>> or ft_ calls in cpu/mpc8xx, nor in any 8xx board that I recognize.
> 
> The STx XTc 885 is supported and was used for
> a majority of the FT development in u-boot.  I
> just built it a few months ago, it worked fine, so
> if it isn't working today the changes should be
> minimal to bring it up to date.

OK, that wasn't a board I recognized. :-P

Still, most 8xx boards are not yet converted AFAICT.  Not that it'd be 
hard to do so, but it might be a bit misleading to say "upgrade u-boot 
and get device tree support". :-)

-Scott

Re: mpc 860 boot linux2.6.23 problem

[Jochen Friedrich]

Hi Scott,

> I just pulled Wolfgang's latest u-boot tree, and I don't see any fdt or 
> ft_ calls in cpu/mpc8xx, nor in any 8xx board that I recognize.
>
> I may have been unclear in that I was talking about device tree support 
> in u-boot, not the kernel.  Obviously there's device tree support in the 
> kernel, as evidenced by my reference to using cuImage.
>   

Can u-boot work on dtb trees embedded in an cuImage, at all?
How would command line arguments work without a chosen
node?

I tried to boot a mpc823 using the 3 argument mboot command.
u-boot processed the dtb and added the chosen node correctly,
however the kernel immediately oopsed with unable to access
virtual memory when accessing the dtb memory as this memory
was not contained in the kernel MMU space.

Thanks,
Jochen

Re: mpc 860 boot linux2.6.23 problem

[Scott Wood]

Jochen Friedrich wrote:
> Hi Scott,
> 
>> I just pulled Wolfgang's latest u-boot tree, and I don't see any fdt 
>> or ft_ calls in cpu/mpc8xx, nor in any 8xx board that I recognize.
>>
>> I may have been unclear in that I was talking about device tree 
>> support in u-boot, not the kernel.  Obviously there's device tree 
>> support in the kernel, as evidenced by my reference to using cuImage.
>>   
> 
> Can u-boot work on dtb trees embedded in an cuImage, at all?

No.  If you want that, you need to use a normal uImage.

> How would command line arguments work without a chosen
> node?

The bad old way: argument registers and the bd_t.  The bootwrapper fills 
in /chosen/bootargs and other things based on that.

It's just for compatibility; use uImage if you can.

> I tried to boot a mpc823 using the 3 argument mboot command.
> u-boot processed the dtb and added the chosen node correctly,
> however the kernel immediately oopsed with unable to access
> virtual memory when accessing the dtb memory as this memory
> was not contained in the kernel MMU space.

Make sure your version of u-boot understands the new bindings for things 
like brg frequency, or (less preferred) set it manually in your dts.

-Scott

mpc 860 boot linux2.6.23 problem

[keng_629]

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the problem has solved ,it is the serial cpm dug,but i don't know where it is.
i used the denx linux tree,it works fine,thank you for you help.
thank you




keng_629
2007-10-19



发件人： Scott Wood
发送时间： 2007-10-18 01:32:05
收件人： Dan Malek
抄送： linuxppc-embedded@ozlabs.org
主题： Re: mpc 860 boot linux2.6.23 problem

Dan  Malek  wrote:
>  
>  On  Oct  17,  2007,  at  11:31  AM,  Scott  Wood  wrote:
>  
> >  I  just  pulled  Wolfgang's  latest  u-boot  tree,  and  I  don't  see  any  fdt  
> >  or  ft_  calls  in  cpu/mpc8xx,  nor  in  any  8xx  board  that  I  recognize.
>  
>  The  STx  XTc  885  is  supported  and  was  used  for
>  a  majority  of  the  FT  development  in  u-boot.    I
>  just  built  it  a  few  months  ago,  it  worked  fine,  so
>  if  it  isn't  working  today  the  changes  should  be
>  minimal  to  bring  it  up  to  date.

OK,  that  wasn't  a  board  I  recognized.  :-P

Still,  most  8xx  boards  are  not  yet  converted  AFAICT.    Not  that  it'd  be  
hard  to  do  so,  but  it  might  be  a  bit  misleading  to  say  "upgrade  u-boot  
and  get  device  tree  support".  :-)

-Scott
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