[RFC] powerpc: Merge 32/64 cacheflush code

[Kumar Gala]

David,

Never saw a response to my query.

- k

On Dec 20, 2005, at 8:00 AM, Kumar Gala wrote:

>
> On Dec 19, 2005, at 5:54 PM, David Gibson wrote:
>
>> On Mon, Dec 19, 2005 at 09:30:37AM -0600, Kumar Gala wrote:
>>>
>>> On Dec 18, 2005, at 11:44 PM, David Gibson wrote:
>>>
>>>> Paulus et al, I think the patch below is roughly the right way  
>>>> to go,
>>>> but it needs much more review and testing (at present it's been
>>>> cursorily tested on ppc64 pSeries only).
>>>>
>>>> This patch merges the cache flushing code for 32 and 64 bit powerpc
>>>> machines.  This means the ppc64_caches mechanism for determining
>>>> correct cache sizes at runtime is ported to 32-bit, and is thus
>>>> renamed as 'powerpc_caches'.  The merged cache flushing  
>>>> functions go
>>>> in new file arch/powerpc/kernel/cache.S.
>>>
>>> Why dont we just use the cache line information in the cputable?   
>>> Why
>>> the introduction of this new powerpc_caches structure?
>>
>> Because the device tree can override the information from the
>> cputable.  Oh, and the structure is only new for ppc32.
>
> If the device tree overrides the cputable should we not believe  
> it?  I guess I dont understand why we need the same information in  
> multiple places?
>
> - kumar
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