ARM: mvebu: use DT properties to fine-tune the L2 configuration

In order to optimize the L2 cache performance, this commit adjusts the
configuration of the L2 on the Cortex-A9 based Marvell EBU processors
(Armada 375, 38x and 39x), using the appropriate DT properties.

We enable double linefill, incr double linefill, data prefetch and
disable double linefill on wrap. This matches the configuration that
was fine tuned in the Marvell BSP.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>

diff --git a/arch/arm/boot/dts/armada-375.dtsi b/arch/arm/boot/dts/armada-375.dtsi
index 67a0ab0..e9a3817 100644 (file)
--- a/arch/arm/boot/dts/armada-375.dtsi
+++ b/arch/arm/boot/dts/armada-375.dtsi
@@ -176,6 +176,10 @@
                                reg = <0x8000 0x1000>;
                                cache-unified;
                                cache-level = <2>;
+                               arm,double-linefill-incr = <1>;
+                               arm,double-linefill-wrap = <0>;
+                               arm,double-linefill = <1>;
+                               prefetch-data = <1>;
                        };
 
                        scu@c000 {

diff --git a/arch/arm/boot/dts/armada-38x.dtsi b/arch/arm/boot/dts/armada-38x.dtsi
index 1230bfd..f9f2347 100644 (file)
--- a/arch/arm/boot/dts/armada-38x.dtsi
+++ b/arch/arm/boot/dts/armada-38x.dtsi
@@ -143,6 +143,10 @@
                                reg = <0x8000 0x1000>;
                                cache-unified;
                                cache-level = <2>;
+                               arm,double-linefill-incr = <1>;
+                               arm,double-linefill-wrap = <0>;
+                               arm,double-linefill = <1>;
+                               prefetch-data = <1>;
                        };
 
                        scu@c000 {

diff --git a/arch/arm/boot/dts/armada-39x.dtsi b/arch/arm/boot/dts/armada-39x.dtsi
index 619b790..dc6efd3 100644 (file)
--- a/arch/arm/boot/dts/armada-39x.dtsi
+++ b/arch/arm/boot/dts/armada-39x.dtsi
@@ -104,6 +104,10 @@
                                reg = <0x8000 0x1000>;
                                cache-unified;
                                cache-level = <2>;
+                               arm,double-linefill-incr = <1>;
+                               arm,double-linefill-wrap = <0>;
+                               arm,double-linefill = <1>;
+                               prefetch-data = <1>;
                        };
 
                        scu@c000 {