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| author | Álvaro Fernández Rojas <noltari@gmail.com> | 2021-02-18 18:04:33 +0100 |
|---|---|---|
| committer | Álvaro Fernández Rojas <noltari@gmail.com> | 2021-02-18 23:42:32 +0100 |
| commit | f07e572f6447465d8938679533d604e402b0f066 (patch) | |
| tree | cb333bd2a67e59e7c07659514850a0fd55fc825e /target/linux/bcm27xx/patches-5.4/950-0953-ARM-dts-bcm2835-Use-the-L2-non-allocating-alias.patch | |
| parent | 5d3a6fd970619dfc55f8259035c3027d7613a2a6 (diff) | |
| download | upstream-f07e572f6447465d8938679533d604e402b0f066.tar.gz upstream-f07e572f6447465d8938679533d604e402b0f066.tar.bz2 upstream-f07e572f6447465d8938679533d604e402b0f066.zip | |
bcm27xx: import latest patches from the RPi foundation
bcm2708: boot tested on RPi B+ v1.2
bcm2709: boot tested on RPi 3B v1.2 and RPi 4B v1.1 4G
bcm2710: boot tested on RPi 3B v1.2
bcm2711: boot tested on RPi 4B v1.1 4G
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0953-ARM-dts-bcm2835-Use-the-L2-non-allocating-alias.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0953-ARM-dts-bcm2835-Use-the-L2-non-allocating-alias.patch | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0953-ARM-dts-bcm2835-Use-the-L2-non-allocating-alias.patch b/target/linux/bcm27xx/patches-5.4/950-0953-ARM-dts-bcm2835-Use-the-L2-non-allocating-alias.patch new file mode 100644 index 0000000000..d87ffc8c22 --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0953-ARM-dts-bcm2835-Use-the-L2-non-allocating-alias.patch @@ -0,0 +1,30 @@ +From 121fdf16a2ff4cf651c376a37eeca255544c47fd Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.com> +Date: Thu, 27 Aug 2020 17:57:18 +0100 +Subject: [PATCH] ARM: dts: bcm2835: Use the L2 non-allocating alias + +The /soc/dma-ranges property on BCM2835 currently results in DMA +addresses in the range 0x40000000-0x5fffffff. This will allocate in the +system L2 cache, which may adversely affect performance. + +Change the dma-ranges property to give addresses in the range +0x80000000-0x9fffffff, which are coherent with L2 but non-allocating. + +See: https://github.com/raspberrypi/linux/issues/3602 + +Signed-off-by: Phil Elwell <phil@raspberrypi.com> +--- + arch/arm/boot/dts/bcm2835.dtsi | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +--- a/arch/arm/boot/dts/bcm2835.dtsi ++++ b/arch/arm/boot/dts/bcm2835.dtsi +@@ -18,7 +18,7 @@ + + soc { + ranges = <0x7e000000 0x20000000 0x02000000>; +- dma-ranges = <0x40000000 0x00000000 0x20000000>; ++ dma-ranges = <0x80000000 0x00000000 0x20000000>; + }; + + arm-pmu { |