defining ARM machine type properly

defining ARM machine type properly

[f. achkar]

hi,
I'm trying to port smdk2450 arch to the a new kernel 2.6.32-9, I did the
initial work as per various googled documents, but somehow the current
initial Image is failing at arch/arm/kernel/head-common.S :
'__lookup_processor_type', and eventually goes to '__error_a' of the
same file! this seems to be related to the definition of machine_type as
defined in :
include/asm-arm/mach-types.h  and arch/arm/tools/mach-types*
I checked where the definition goes in  include/asm-arm/mach-types.h by
inserting
#error 2223XX
into various parts of that header and seems fine at the point.
nevertheless I'm not 100 sure
I wonder if the is a definitive reference to guide in this matter,
better yet a check-list like procedure??
thanks,
ferar

defining ARM machine type properly

[Ben Dooks]

On Wed, May 26, 2010 at 05:11:22PM -0400, f. achkar wrote:
> hi,
> I'm trying to port smdk2450 arch to the a new kernel 2.6.32-9, I did the

I suspect what you are doing is trying to port it to a machine that
was loosley based on the SMDK2450 and that whoever did the uboot port
failed to understand that when the hardware changes then the machine
number needs to change too.

> initial work as per various googled documents, but somehow the current
> initial Image is failing at arch/arm/kernel/head-common.S :
> '__lookup_processor_type', and eventually goes to '__error_a' of the
> same file! this seems to be related to the definition of machine_type as
> defined in :
> include/asm-arm/mach-types.h  and arch/arm/tools/mach-types*
> I checked where the definition goes in  include/asm-arm/mach-types.h by
> inserting

you probably wanted to enable the debugging in the head code.

> #error 2223XX
> into various parts of that header and seems fine at the point.
> nevertheless I'm not 100 sure
> I wonder if the is a definitive reference to guide in this matter,
> better yet a check-list like procedure??
> thanks,
> ferar

How about downloading the latest kernel, with nice fresh S3C2450 support
in it?

-- 
Ben

Q:      What's a light-year?
A:      One-third less calories than a regular year.

defining ARM machine type properly

[Wan ZongShun]

2010/5/27 f. achkar <fachkar.datawind@gmail.com>:
> hi,
> I'm trying to port smdk2450 arch to the a new kernel 2.6.32-9, I did the
> initial work as per various googled documents, but somehow the current
> initial Image is failing at arch/arm/kernel/head-common.S :
> '__lookup_processor_type', and eventually goes to '__error_a' of the

The '__lookup_processor_type' goes to '__error_a'  is not related to
your machine_type,
you should check whether there is a true definition of  select
CPU_ARMxx in the arch/arm/kconfig.

The issue maybe result from you get a wrong ARM processor type
number,which is not equal to
the R9 resigster value.

> same file! this seems to be related to the definition of machine_type as
> defined in :
> include/asm-arm/mach-types.h ?and arch/arm/tools/mach-types*
> I checked where the definition goes in ?include/asm-arm/mach-types.h by
> inserting
> #error 2223XX
> into various parts of that header and seems fine at the point.
> nevertheless I'm not 100 sure
> I wonder if the is a definitive reference to guide in this matter,
> better yet a check-list like procedure??
> thanks,
> ferar
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel at lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>



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defining ARM machine type properly

[f. achkar]

On 05/26/2010 09:07 PM, Ben Dooks wrote:
> On Wed, May 26, 2010 at 05:11:22PM -0400, f. achkar wrote:
>   
>> hi,
>> I'm trying to port smdk2450 arch to the a new kernel 2.6.32-9, I did the
>>     
> I suspect what you are doing is trying to port it to a machine that
> was loosley based on the SMDK2450 and that whoever did the uboot port
> failed to understand that when the hardware changes then the machine
> number needs to change too.
>   
u-boot came with the evaluation board so it is samsung's doing! however,
the u-boot correctly reports the machine type of 0x648 (corresponding to
1608 ), I suspect me wrong doing :( in setting the correct mach_type in
the linux-2.6.32-9.
>   
>> initial work as per various googled documents, but somehow the current
>> initial Image is failing at arch/arm/kernel/head-common.S :
>> '__lookup_processor_type', and eventually goes to '__error_a' of the
>> same file! this seems to be related to the definition of machine_type as
>> defined in :
>> include/asm-arm/mach-types.h  and arch/arm/tools/mach-types*
>> I checked where the definition goes in  include/asm-arm/mach-types.h by
>> inserting
>>     
> you probably wanted to enable the debugging in the head code.
>
>   
>> #error 2223XX
>> into various parts of that header and seems fine at the point.
>> nevertheless I'm not 100 sure
>> I wonder if the is a definitive reference to guide in this matter,
>> better yet a check-list like procedure??
>> thanks,
>> ferar
>>     
> How about downloading the latest kernel, with nice fresh S3C2450 support
> in it?
>   
excellent, I'll check that ... thaks

defining ARM machine type properly

[f. achkar]

On 05/26/2010 11:14 PM, Wan ZongShun wrote:
> 2010/5/27 f. achkar <fachkar.datawind@gmail.com>:
>   
>> hi,
>> I'm trying to port smdk2450 arch to the a new kernel 2.6.32-9, I did the
>> initial work as per various googled documents, but somehow the current
>> initial Image is failing at arch/arm/kernel/head-common.S :
>> '__lookup_processor_type', and eventually goes to '__error_a' of the
>>     
> The '__lookup_processor_type' goes to '__error_a'  is not related to
> your machine_type,
> you should check whether there is a true definition of  select
> CPU_ARMxx in the arch/arm/kconfig.
>   
 Symbol: MACH_SMDK2450
[=y]                                                                                                    
? 
  ? Prompt:
SMDK2450                                                                                                              
? 
  ?   Defined at
arch/arm/mach-s3c2450/Kconfig:30                                                                                 
? 
  ?   Depends on:
ARCH_S3C2410                                                                                                    
? 
  ?  
Location:                                                                                                                   
? 
  ?     -> System
Type                                                                                                            
? 
  ?       -> S3C2450
Machines                                                                                                     
? 
  ?   Selects: CPU_S3C2450 && MACH_SMDK
> The issue maybe result from you get a wrong ARM processor type
> number,which is not equal to
> the R9 resigster value.
>   
most likely the case, what should be my check-list to verify correct doing?
thanks,
>   
>> same file! this seems to be related to the definition of machine_type as
>> defined in :
>> include/asm-arm/mach-types.h  and arch/arm/tools/mach-types*
>> I checked where the definition goes in  include/asm-arm/mach-types.h by
>> inserting
>> #error 2223XX
>> into various parts of that header and seems fine at the point.
>> nevertheless I'm not 100 sure
>> I wonder if the is a definitive reference to guide in this matter,
>> better yet a check-list like procedure??
>> thanks,
>> ferar
>>
>> _______________________________________________
>> linux-arm-kernel mailing list
>> linux-arm-kernel at lists.infradead.org
>> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>>
>>     
>
>
>   

defining ARM machine type properly

[f. achkar]

On 05/26/2010 09:07 PM, Ben Dooks wrote:
> On Wed, May 26, 2010 at 05:11:22PM -0400, f. achkar wrote:
>   
>> hi,
>> I'm trying to port smdk2450 arch to the a new kernel 2.6.32-9, I did the
>>     
> I suspect what you are doing is trying to port it to a machine that
> was loosley based on the SMDK2450 and that whoever did the uboot port
> failed to understand that when the hardware changes then the machine
> number needs to change too.
>
>   
>> initial work as per various googled documents, but somehow the current
>> initial Image is failing at arch/arm/kernel/head-common.S :
>> '__lookup_processor_type', and eventually goes to '__error_a' of the
>> same file! this seems to be related to the definition of machine_type as
>> defined in :
>> include/asm-arm/mach-types.h  and arch/arm/tools/mach-types*
>> I checked where the definition goes in  include/asm-arm/mach-types.h by
>> inserting
>>     
> you probably wanted to enable the debugging in the head code.
>
>   
>> #error 2223XX
>> into various parts of that header and seems fine at the point.
>> nevertheless I'm not 100 sure
>> I wonder if the is a definitive reference to guide in this matter,
>> better yet a check-list like procedure??
>> thanks,
>> ferar
>>     
> How about downloading the latest kernel, with nice fresh S3C2450 support
> in it?
>   
which version is that? 2.6.34 does not contain such support!
thanks

defining ARM machine type properly

[Ben Dooks]

On Thu, May 27, 2010 at 11:08:35AM -0400, f. achkar wrote:
> On 05/26/2010 09:07 PM, Ben Dooks wrote:
> > On Wed, May 26, 2010 at 05:11:22PM -0400, f. achkar wrote:
> >   
> >> hi,
> >> I'm trying to port smdk2450 arch to the a new kernel 2.6.32-9, I did the
> >>     
> > I suspect what you are doing is trying to port it to a machine that
> > was loosley based on the SMDK2450 and that whoever did the uboot port
> > failed to understand that when the hardware changes then the machine
> > number needs to change too.
> >
> >   
> >> initial work as per various googled documents, but somehow the current
> >> initial Image is failing at arch/arm/kernel/head-common.S :
> >> '__lookup_processor_type', and eventually goes to '__error_a' of the
> >> same file! this seems to be related to the definition of machine_type as
> >> defined in :
> >> include/asm-arm/mach-types.h  and arch/arm/tools/mach-types*
> >> I checked where the definition goes in  include/asm-arm/mach-types.h by
> >> inserting
> >>     
> > you probably wanted to enable the debugging in the head code.
> >
> >   
> >> #error 2223XX
> >> into various parts of that header and seems fine at the point.
> >> nevertheless I'm not 100 sure
> >> I wonder if the is a definitive reference to guide in this matter,
> >> better yet a check-list like procedure??
> >> thanks,
> >> ferar
> >>     
> > How about downloading the latest kernel, with nice fresh S3C2450 support
> > in it?
> >   
> which version is that? 2.6.34 does not contain such support!
> thanks

2.6.34-git

core support is in, hopefully core peripheral support can be sorted out
and released as soon as possible.

-- 
Ben

Q:      What's a light-year?
A:      One-third less calories than a regular year.