> -----Original Message----- > From: Gala Kumar-B11780 > Sent: Wednesday, January 23, 2013 11:27 AM > To: Wood Scott-B07421; Yoder Stuart-B08248 > Cc: linuxppc-...@ozlabs.org list; Timur Tabi > Subject: Re: [PATCH 2/2] powerpc/85xx: describe the PAMU topology in the > device tree > > > 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?
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