[PATCH v2 04/28] ARM: mm: cache-l2x0: Add support for re-enabling l2x0

Catalin Marinas catalin.marinas at arm.com
Tue Jan 25 13:14:02 EST 2011

On Tue, 2011-01-25 at 15:41 +0000, Russell King - ARM Linux wrote:
> I think we need to come up with some proper way to deal with cpuidle
> which doesn't involve adding lots of globally visible functions to all
> sorts of bits of code and having platforms call them individually,
> otherwise this is going to get _really_ messy in the future.
> Maybe we need a notifier list which can be told when cpuidle events
> happen, so that parts of the system such as VFP and L2 cache support
> can do the right thing without having platforms add lots of stuff like
>         gic_secondary_init();
>         gic_restore_interrupt_types();
>         vfp_enable();
>         l2x0_enable();
>         twd_enable();
>         ... etc ...
> in their SoC specific code.

But do we need a strict order between such operations? The notifier call
chain isn't too flexible.


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