Re: [RFC 00/23] Introducing the TI Keystone platform

[Will Deacon]

Hi Cyril,

Thanks for this, certainly looks like an interesting platform!

Of course, in order to perform any sort of sensible review, I'll need some
silicon to test it on :)

On Tue, Jul 24, 2012 at 02:09:02AM +0100, Cyril Chemparathy wrote:
> TI's scalable KeyStone II architecture includes support for both TMS320C66x
> floating point DSPs and ARM Cortex-A15 clusters, for a mixture of up to 32
> cores per SoC.  The solution is optimized around a high performance chip
> interconnect and a rich set of on chip peripherals.  Please refer [1] for
> initial technical documentation on these devices.

How many A15s can you have on such a SoC? It wasn't clear whether it was 1x4
or 4x4 from the documentation.

> This patch series provides a basic Linux port for these devices, including
> support for SMP, and LPAE boot.  A majority of the patches in this series are
> related to LPAE functionality, imposed by the device architecture which has
> system memory mapped at an address above the 4G 32-bit addressable limit.

I assume you have *some* memory in the bottom 32-bits though, right? Even if
it's just a partial alias of a higher bank.

> This patch series is based on the v3.5 kernel with the smp_ops patch set
> applied on top.  This series is being posted to elicit early feedback, and so
> that some of these fixes may get incorporated early on into the kernel code.
> 
>   [1] - http://www.ti.com/product/tms320tci6636

This is marked as `TI confidential' but I guess that's an oversight [or will
you have to kill me?].

Will
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