diff options
| author | Richard Schleich <rs@noreya.tech> | 2022-02-05 20:59:11 +0100 |
|---|---|---|
| committer | Florian Fainelli <f.fainelli@gmail.com> | 2022-02-11 14:24:48 -0800 |
| commit | 4c9b25077eb12534ab63dbefbab1ae6ff41c2144 (patch) | |
| tree | 11ecb7e39b685fcf06f942bc70c02baca687212b /arch/arm/boot/dts/bcm2835.dtsi | |
| parent | 618682b350990f8f1bee718949c4b3858711eb58 (diff) | |
| download | linux-4c9b25077eb12534ab63dbefbab1ae6ff41c2144.tar.bz2 | |
ARM: dts: bcm2835/6: Add the missing L1/L2 cache information
This patch adds the cache info for the BCM2835 and BCM2836.
However, while testing I noticed that this is
not implemented for ARMv6/7.
Basically arch/arm/kernel/cacheinfo.c and other topology
related code is missing.
Since the work is already done and this has no negative effects,
I am submitting it for future/documentation purposes.
Signed-off-by: Richard Schleich <rs@noreya.tech>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Diffstat (limited to 'arch/arm/boot/dts/bcm2835.dtsi')
| -rw-r--r-- | arch/arm/boot/dts/bcm2835.dtsi | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/bcm2835.dtsi b/arch/arm/boot/dts/bcm2835.dtsi index 0549686134ea..1c90e5a44283 100644 --- a/arch/arm/boot/dts/bcm2835.dtsi +++ b/arch/arm/boot/dts/bcm2835.dtsi @@ -14,6 +14,23 @@ device_type = "cpu"; compatible = "arm,arm1176jzf-s"; reg = <0x0>; + /* Source for d/i-cache-line-size and d/i-cache-sets + * https://developer.arm.com/documentation/ddi0301 + * /h/level-one-memory-system/cache-organization?lang=en + * + * Source for d/i-cache-size + * https://forums.raspberrypi.com/viewtopic.php?t=98428 + * + * NOTE: The BCM2835 has a L2 cache but it is dedicated to the GPU + * It can be shared with the CPU through fw settings, + * but this is not recommended. + */ + d-cache-size = <0x4000>; + d-cache-line-size = <16>; + d-cache-sets = <256>; // 16KiB(size)/16(line-size)=1024ways/4-way set + i-cache-size = <0x4000>; + i-cache-line-size = <16>; + i-cache-sets = <256>; // 16KiB(size)/16(line-size)=1024ways/4-way set }; }; |