[RFC PATCH 0/8] Introduce logical CPU mapping

Santosh santosh.shilimkar at ti.com
Wed Aug 10 04:50:08 EDT 2011


Will,

On Wednesday 10 August 2011 03:12 AM, Will Deacon wrote:
> Hello,
>
> This patch series is an RFC following a discussion I had with Russell
> the other day:
>
>   http://lists.infradead.org/pipermail/linux-arm-kernel/2011-August/060370.html
>
> The approach I've taken is fairly simple but is enough for booting on a
> CPU with physical ID != 0 on platforms which can handle it.
>
> Note that I haven't touched the OMAP4 or Tegra platforms since it's not
> clear from the code how they would be adapted to make use of the
> physical CPU number.
>
On OMAP, we use hardware register hand-shake for boot between a boot CPU
and non-boot CPU. On OMAP4, boot CPU has to be always CPU0 to ensure
that security and firewall initialisation is taken care. Other CPU can't
do those things.

Regards
Santosh



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