[PATCH v1 2/2] ARM: dts: samsung: Add cache information to the Exynos542x SoC

Anand Moon
2024-07-30T09:13:56Z

As per Exynos 5422 user manual add missing cache information to
the Exynos542x SoC.

- Each Cortex-A7 core has 32 KB of instruction cache and
32 KB of L1 data cache available.
- Each Cortex-A15 core has 32 KB of L1 instruction cache and
32 KB of L1 data cache available.
- The little (A7) cluster has 512 KB of unified L2 cache available.
- The big (A15) cluster has 2 MB of unified L2 cache available.

Features:
- Exynos 5422 support cache coherency interconnect (CCI) bus with
L2 cache snooping capability. This hardware automatic L2 cache
snooping removes the efforts of synchronizing the contents of the
two L2 caches in core switching event.

Signed-off-by: Anand Moon <linux.amoon@gmail.com>
---
.../arm/boot/dts/samsung/exynos5422-cpus.dtsi | 74 +++++++++++++++++++
1 file changed, 74 insertions(+)

diff --git a/arch/arm/boot/dts/samsung/exynos5422-cpus.dtsi b/arch/arm/boot/dts/samsung/exynos5422-cpus.dtsi
index 412a0bb4b988..9b9b2bdfb522 100644
--- a/arch/arm/boot/dts/samsung/exynos5422-cpus.dtsi
+++ b/arch/arm/boot/dts/samsung/exynos5422-cpus.dtsi
@@ -59,6 +59,13 @@ cpu0: cpu@100 {
reg = <0x100>;
clocks = <&clock CLK_KFC_CLK>;
clock-frequency = <1000000000>;
+ d-cache-line-size = <32>;
+ d-cache-size = <0x8000>;
+ d-cache-sets = <32>;
+ i-cache-line-size = <32>;
+ i-cache-size = <0x8000>;
+ i-cache-sets = <32>;
+ next-level-cache = <&L2_a7>;
cci-control-port = <&cci_control0>;
operating-points-v2 = <&cluster_a7_opp_table>;
#cooling-cells = <2>; /* min followed by max */
@@ -72,6 +79,13 @@ cpu1: cpu@101 {
reg = <0x101>;
clocks = <&clock CLK_KFC_CLK>;
clock-frequency = <1000000000>;
+ d-cache-line-size = <32>;
+ d-cache-size = <0x8000>;
+ d-cache-sets = <32>;
+ i-cache-line-size = <32>;
+ i-cache-size = <0x8000>;
+ i-cache-sets = <32>;
+ next-level-cache = <&L2_a7>;
cci-control-port = <&cci_control0>;
operating-points-v2 = <&cluster_a7_opp_table>;
#cooling-cells = <2>; /* min followed by max */
@@ -85,6 +99,13 @@ cpu2: cpu@102 {
reg = <0x102>;
clocks = <&clock CLK_KFC_CLK>;
clock-frequency = <1000000000>;
+ d-cache-line-size = <32>;
+ d-cache-size = <0x8000>;
+ d-cache-sets = <32>;
+ i-cache-line-size = <32>;
+ i-cache-size = <0x8000>;
+ i-cache-sets = <32>;
+ next-level-cache = <&L2_a7>;
cci-control-port = <&cci_control0>;
operating-points-v2 = <&cluster_a7_opp_table>;
#cooling-cells = <2>; /* min followed by max */
@@ -98,6 +119,13 @@ cpu3: cpu@103 {
reg = <0x103>;
clocks = <&clock CLK_KFC_CLK>;
clock-frequency = <1000000000>;
+ d-cache-line-size = <32>;
+ d-cache-size = <0x8000>;
+ d-cache-sets = <32>;
+ i-cache-line-size = <32>;
+ i-cache-size = <0x8000>;
+ i-cache-sets = <32>;
+ next-level-cache = <&L2_a7>;
cci-control-port = <&cci_control0>;
operating-points-v2 = <&cluster_a7_opp_table>;
#cooling-cells = <2>; /* min followed by max */
@@ -111,6 +139,13 @@ cpu4: cpu@0 {
reg = <0x0>;
clocks = <&clock CLK_ARM_CLK>;
clock-frequency = <1800000000>;
+ d-cache-line-size = <32>;
+ d-cache-size = <0x8000>;
+ d-cache-sets = <32>;
+ i-cache-line-size = <32>;
+ i-cache-size = <0x8000>;
+ i-cache-sets = <32>;
+ next-level-cache = <&L2_a15>;
cci-control-port = <&cci_control1>;
operating-points-v2 = <&cluster_a15_opp_table>;
#cooling-cells = <2>; /* min followed by max */
@@ -124,6 +159,13 @@ cpu5: cpu@1 {
reg = <0x1>;
clocks = <&clock CLK_ARM_CLK>;
clock-frequency = <1800000000>;
+ d-cache-line-size = <32>;
+ d-cache-size = <0x8000>;
+ d-cache-sets = <32>;
+ i-cache-line-size = <32>;
+ i-cache-size = <0x8000>;
+ i-cache-sets = <32>;
+ next-level-cache = <&L2_a15>;
cci-control-port = <&cci_control1>;
operating-points-v2 = <&cluster_a15_opp_table>;
#cooling-cells = <2>; /* min followed by max */
@@ -137,6 +179,13 @@ cpu6: cpu@2 {
reg = <0x2>;
clocks = <&clock CLK_ARM_CLK>;
clock-frequency = <1800000000>;
+ d-cache-line-size = <32>;
+ d-cache-size = <0x8000>;
+ d-cache-sets = <32>;
+ i-cache-line-size = <32>;
+ i-cache-size = <0x8000>;
+ i-cache-sets = <32>;
+ next-level-cache = <&L2_a15>;
cci-control-port = <&cci_control1>;
operating-points-v2 = <&cluster_a15_opp_table>;
#cooling-cells = <2>; /* min followed by max */
@@ -150,12 +199,37 @@ cpu7: cpu@3 {
reg = <0x3>;
clocks = <&clock CLK_ARM_CLK>;
clock-frequency = <1800000000>;
+ d-cache-line-size = <32>;
+ d-cache-size = <0x8000>;
+ d-cache-sets = <32>;
+ i-cache-line-size = <32>;
+ i-cache-size = <0x8000>;
+ i-cache-sets = <32>;
+ next-level-cache = <&L2_a15>;
cci-control-port = <&cci_control1>;
operating-points-v2 = <&cluster_a15_opp_table>;
#cooling-cells = <2>; /* min followed by max */
capacity-dmips-mhz = <1024>;
dynamic-power-coefficient = <310>;
};
+
+ L2_a7: l2-cache-cluster0 {
+ compatible = "cache";
+ cache-level = <2>;
+ cache-unified;
+ cache-size = <0x80000>; /* L2. 512 KB */
+ cache-line-size = <64>;
+ cache-sets = <512>;
+ };
+
+ L2_a15: l2-cache-cluster1 {
+ compatible = "cache";
+ cache-level = <2>;
+ cache-unified;
+ cache-size = <0x200000>; /* L2, 2M */
+ cache-line-size = <64>;
+ cache-sets = <512>;
+ };
};
};

--
2.44.0