diff mbox series

arm64: dts: fvp: Add information about L1 and L2 caches

Message ID 20221118151017.704716-1-sudeep.holla@arm.com
State Accepted
Commit b2d5025e129289d9b914c696646e64495a7453c0
Headers show
Series arm64: dts: fvp: Add information about L1 and L2 caches | expand

Commit Message

Sudeep Holla Nov. 18, 2022, 3:10 p.m. UTC 
Add the information about L1 and L2 caches on FVP RevC platform.
Though the cache size is configurable through the model parameters,
having default values in the device tree helps to exercise and debug
any code utilising the cache information without the need of real
hardware.

Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
---
 arch/arm64/boot/dts/arm/fvp-base-revc.dts | 73 +++++++++++++++++++++++
 1 file changed, 73 insertions(+)

Hi,

When a bug was reported recently on cacheinfo, I was trying to reproduce
it but couldn't get access to any hardware. So I ended up using this model
and it was useful. So thought of adding the same upstream.

Regards,
Sudeep

Comments

Sudeep Holla Nov. 25, 2022, 5:06 p.m. UTC | #1 
On Fri, 18 Nov 2022 15:10:17 +0000, Sudeep Holla wrote:
> Add the information about L1 and L2 caches on FVP RevC platform.
> Though the cache size is configurable through the model parameters,
> having default values in the device tree helps to exercise and debug
> any code utilising the cache information without the need of real
> hardware.
> 
> 
> [...]

Applied to sudeep.holla/linux (for-next/juno), thanks!

[1/1] arm64: dts: fvp: Add information about L1 and L2 caches
      https://git.kernel.org/sudeep.holla/c/b2d5025e1292
--
Regards,
Sudeep
diff mbox series

Patch

diff --git a/arch/arm64/boot/dts/arm/fvp-base-revc.dts b/arch/arm64/boot/dts/arm/fvp-base-revc.dts
index 5f6f30c801a7..60472d65a355 100644
--- a/arch/arm64/boot/dts/arm/fvp-base-revc.dts
+++ b/arch/arm64/boot/dts/arm/fvp-base-revc.dts
@@ -47,48 +47,121 @@  cpu0: cpu@0 {
 			compatible = "arm,armv8";
 			reg = <0x0 0x000>;
 			enable-method = "psci";
+			i-cache-size = <0x8000>;
+			i-cache-line-size = <64>;
+			i-cache-sets = <256>;
+			d-cache-size = <0x8000>;
+			d-cache-line-size = <64>;
+			d-cache-sets = <256>;
+			next-level-cache = <&C0_L2>;
 		};
 		cpu1: cpu@100 {
 			device_type = "cpu";
 			compatible = "arm,armv8";
 			reg = <0x0 0x100>;
 			enable-method = "psci";
+			i-cache-size = <0x8000>;
+			i-cache-line-size = <64>;
+			i-cache-sets = <256>;
+			d-cache-size = <0x8000>;
+			d-cache-line-size = <64>;
+			d-cache-sets = <256>;
+			next-level-cache = <&C0_L2>;
 		};
 		cpu2: cpu@200 {
 			device_type = "cpu";
 			compatible = "arm,armv8";
 			reg = <0x0 0x200>;
 			enable-method = "psci";
+			i-cache-size = <0x8000>;
+			i-cache-line-size = <64>;
+			i-cache-sets = <256>;
+			d-cache-size = <0x8000>;
+			d-cache-line-size = <64>;
+			d-cache-sets = <256>;
+			next-level-cache = <&C0_L2>;
 		};
 		cpu3: cpu@300 {
 			device_type = "cpu";
 			compatible = "arm,armv8";
 			reg = <0x0 0x300>;
 			enable-method = "psci";
+			i-cache-size = <0x8000>;
+			i-cache-line-size = <64>;
+			i-cache-sets = <256>;
+			d-cache-size = <0x8000>;
+			d-cache-line-size = <64>;
+			d-cache-sets = <256>;
+			next-level-cache = <&C0_L2>;
 		};
 		cpu4: cpu@10000 {
 			device_type = "cpu";
 			compatible = "arm,armv8";
 			reg = <0x0 0x10000>;
 			enable-method = "psci";
+			i-cache-size = <0x8000>;
+			i-cache-line-size = <64>;
+			i-cache-sets = <256>;
+			d-cache-size = <0x8000>;
+			d-cache-line-size = <64>;
+			d-cache-sets = <256>;
+			next-level-cache = <&C1_L2>;
 		};
 		cpu5: cpu@10100 {
 			device_type = "cpu";
 			compatible = "arm,armv8";
 			reg = <0x0 0x10100>;
 			enable-method = "psci";
+			i-cache-size = <0x8000>;
+			i-cache-line-size = <64>;
+			i-cache-sets = <256>;
+			d-cache-size = <0x8000>;
+			d-cache-line-size = <64>;
+			d-cache-sets = <256>;
+			next-level-cache = <&C1_L2>;
 		};
 		cpu6: cpu@10200 {
 			device_type = "cpu";
 			compatible = "arm,armv8";
 			reg = <0x0 0x10200>;
 			enable-method = "psci";
+			i-cache-size = <0x8000>;
+			i-cache-line-size = <64>;
+			i-cache-sets = <256>;
+			d-cache-size = <0x8000>;
+			d-cache-line-size = <64>;
+			d-cache-sets = <256>;
+			next-level-cache = <&C1_L2>;
 		};
 		cpu7: cpu@10300 {
 			device_type = "cpu";
 			compatible = "arm,armv8";
 			reg = <0x0 0x10300>;
 			enable-method = "psci";
+			i-cache-size = <0x8000>;
+			i-cache-line-size = <64>;
+			i-cache-sets = <256>;
+			d-cache-size = <0x8000>;
+			d-cache-line-size = <64>;
+			d-cache-sets = <256>;
+			next-level-cache = <&C1_L2>;
+		};
+		C0_L2: l2-cache0 {
+			compatible = "cache";
+			cache-size = <0x80000>;
+			cache-line-size = <64>;
+			cache-sets = <512>;
+			cache-level = <2>;
+			cache-unified;
+		};
+
+		C1_L2: l2-cache1 {
+			compatible = "cache";
+			cache-size = <0x80000>;
+			cache-line-size = <64>;
+			cache-sets = <512>;
+			cache-level = <2>;
+			cache-unified;
 		};
 	};