[PATCH V5 5/5] arm: mvebu: Added SMP support for Armada XP

Gregory CLEMENT gregory.clement at free-electrons.com
Wed Nov 21 07:31:36 EST 2012


On 11/21/2012 01:26 PM, Russell King - ARM Linux wrote:
> On Wed, Nov 21, 2012 at 12:22:51PM +0000, Will Deacon wrote:
>> Sorry, my mistake (I was thinking on my feet) since secondary_startup is
>> declared in a C file, right? How about:
>>
>> 	ldr	lr, =secondary_startup
>> 	b	ll_set_cpu_coherent
> 
> Why?  Do we really want LR to be the _virtual_ address?  No we don't,
> because secondary_startup expects to be called with the MMU off.
> 
> So I go back to my original comment.  What's wrong with:
> 
> 	bl	ll_set_cpu_coherent
> 	b	secondary_startup
> 
> ?

Nothing wrong, it works perfectly.
Whereas indeed the code proposed by Will didn't work very well.
I will take Russell's suggestion.

Thanks,


> 


-- 
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com



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