On 01/23/2013 11:27:29 AM, Gala Kumar-B11780 wrote:
On Jan 17, 2013, at 4:34 PM, Timur Tabi wrote:
> From: Timur Tabi <ti...@freescale.com>
>
> The PAMU caches use the LIODNs to determine which cache lines hold
the
> entries for the corresponding LIODs. The LIODNs must therefore be
> carefully assigned to avoid cache thrashing -- two active LIODs with
> LIODNs that put them in the same cache line.
>
> Currently, LIODNs are statically assigned by U-Boot, but this has
> limitations. LIODNs are assigned even for devices that may be
disabled
> or unused by the kernel. Static assignments also do not allow for
device
> drivers which may know which LIODs can be used simultaneously. In
> other words, we really should assign LIODNs dynamically in Linux.
>
> To do that, we need to describe the PAMU device and cache
topologies in
> the device trees.
>
> Signed-off-by: Timur Tabi <ti...@freescale.com>
> ---
> .../devicetree/bindings/powerpc/fsl/guts.txt | 14 ++-
> .../devicetree/bindings/powerpc/fsl/pamu.txt | 142
++++++++++++++++++++
> arch/powerpc/boot/dts/fsl/p2041si-post.dtsi | 87
+++++++++++--
> arch/powerpc/boot/dts/fsl/p3041si-post.dtsi | 87
+++++++++++--
> arch/powerpc/boot/dts/fsl/p4080si-post.dtsi | 68 +++++++++-
> arch/powerpc/boot/dts/fsl/p5020si-post.dtsi | 92
+++++++++++--
> arch/powerpc/boot/dts/fsl/p5040si-post.dtsi | 92
+++++++++++--
> 7 files changed, 533 insertions(+), 49 deletions(-)
> create mode 100644
Documentation/devicetree/bindings/powerpc/fsl/pamu.txt
Scott, Stuart, does this have your guys Ack?
ACK
-Scott
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