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ARM: dts: bcm2837: Add the missing L1/L2 cache information

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[ Upstream commit bdf8762da268d2a34abf517c36528413906e9cd5 ]

This patch fixes the kernel warning
"cacheinfo: Unable to detect cache hierarchy for CPU 0"
for the bcm2837 on newer kernel versions.

Signed-off-by: Richard Schleich <rs@noreya.tech>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
[florian: Align and remove comments matching property values]
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Richard Schleich 2021-12-18 21:00:09 +01:00 committed by Greg Kroah-Hartman
parent f040c08102
commit 0020667edc
1 changed files with 49 additions and 0 deletions
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49
arch/arm/boot/dts/bcm2837.dtsi
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@ -40,12 +40,26 @@ cpus: cpus {
#size-cells = <0>;
enable-method = "brcm,bcm2836-smp"; // for ARM 32-bit
/* Source for d/i-cache-line-size and d/i-cache-sets
* https://developer.arm.com/documentation/ddi0500/e/level-1-memory-system
* /about-the-l1-memory-system?lang=en
*
* Source for d/i-cache-size
* https://magpi.raspberrypi.com/articles/raspberry-pi-3-specs-benchmarks
*/
cpu0: cpu@0 {
device_type = "cpu";
compatible = "arm,cortex-a53";
reg = <0>;
enable-method = "spin-table";
cpu-release-addr = <0x0 0x000000d8>;
d-cache-size = <0x8000>;
d-cache-line-size = <64>;
d-cache-sets = <128>; // 32KiB(size)/64(line-size)=512ways/4-way set
i-cache-size = <0x8000>;
i-cache-line-size = <64>;
i-cache-sets = <256>; // 32KiB(size)/64(line-size)=512ways/2-way set
next-level-cache = <&l2>;
};
cpu1: cpu@1 {
@ -54,6 +68,13 @@ cpu1: cpu@1 {
reg = <1>;
enable-method = "spin-table";
cpu-release-addr = <0x0 0x000000e0>;
d-cache-size = <0x8000>;
d-cache-line-size = <64>;
d-cache-sets = <128>; // 32KiB(size)/64(line-size)=512ways/4-way set
i-cache-size = <0x8000>;
i-cache-line-size = <64>;
i-cache-sets = <256>; // 32KiB(size)/64(line-size)=512ways/2-way set
next-level-cache = <&l2>;
};
cpu2: cpu@2 {
@ -62,6 +83,13 @@ cpu2: cpu@2 {
reg = <2>;
enable-method = "spin-table";
cpu-release-addr = <0x0 0x000000e8>;
d-cache-size = <0x8000>;
d-cache-line-size = <64>;
d-cache-sets = <128>; // 32KiB(size)/64(line-size)=512ways/4-way set
i-cache-size = <0x8000>;
i-cache-line-size = <64>;
i-cache-sets = <256>; // 32KiB(size)/64(line-size)=512ways/2-way set
next-level-cache = <&l2>;
};
cpu3: cpu@3 {
@ -70,6 +98,27 @@ cpu3: cpu@3 {
reg = <3>;
enable-method = "spin-table";
cpu-release-addr = <0x0 0x000000f0>;
d-cache-size = <0x8000>;
d-cache-line-size = <64>;
d-cache-sets = <128>; // 32KiB(size)/64(line-size)=512ways/4-way set
i-cache-size = <0x8000>;
i-cache-line-size = <64>;
i-cache-sets = <256>; // 32KiB(size)/64(line-size)=512ways/2-way set
next-level-cache = <&l2>;
};
/* Source for cache-line-size + cache-sets
* https://developer.arm.com/documentation/ddi0500
* /e/level-2-memory-system/about-the-l2-memory-system?lang=en
* Source for cache-size
* https://datasheets.raspberrypi.com/cm/cm1-and-cm3-datasheet.pdf
*/
l2: l2-cache0 {
compatible = "cache";
cache-size = <0x80000>;
cache-line-size = <64>;
cache-sets = <512>; // 512KiB(size)/64(line-size)=8192ways/16-way set
cache-level = <2>;
};
};
};