[PATCH] ARM: Update SMP_ON_UP code to detect A9MPCore with 1 CPU devices

Santosh Shilimkar santosh.shilimkar at ti.com
Tue Aug 13 09:31:04 EDT 2013

On Tuesday 13 August 2013 07:19 AM, Will Deacon wrote:
> On Mon, Aug 12, 2013 at 07:34:13PM +0100, Santosh Shilimkar wrote:
>> On Friday 02 August 2013 11:48 AM, Will Deacon wrote:
>>> I think this an A9-specific register, which reads as 0 on UP A9 and reads as
>>> some form of PERIPH_BASE for SMP parts. The issue I have is when PERIPH_BASE
>>> is zero.
>> What do we do here ? Should we document this in the code and proceed ?
>> Mostly there is no platform with PERIPH_BASE = 0, so its should be fine but
>> I am open for any other alternative.
> The only other alternative I can think of is forcing people to have
> CONFIG_SMP=n, but that blows away single zImage for your platform.
Yep which surely we don't want considering after so much effort we
have it working first place. How about going ahead with assumption
that PERIPH_BASE = 0 case doesn't work.


More information about the linux-arm-kernel mailing list