From 23e4a49943624dd83199989c852565a3ff760fa7 Mon Sep 17 00:00:00 2001
From: Sam Protsenko <semen.protsenko@linaro.org>
Date: Sat, 7 Oct 2023 22:36:33 -0500
Subject: [PATCH] arm64: dts: exynos: Add reserved memory for pstore on E850-96
Reserve a 2 MiB memory region to record kmsg dumps, console, ftrace and
userspace messages. The implemented memory split allows capturing and
reading corresponding ring buffers:
* dmesg: 6 dumps, 128 KiB each
* console: 128 KiB
* ftrace: 128 KiB for each of 8 CPUs (1 MiB total)
* userspace messages: 128 KiB
Signed-off-by: Sam Protsenko <semen.protsenko@linaro.org>
Link: https://lore.kernel.org/r/20231008033633.21304-1-semen.protsenko@linaro.org
[krzysztof: move the node to alphabetically sorted position]
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
---
arch/arm64/boot/dts/exynos/exynos850-e850-96.dts | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/arch/arm64/boot/dts/exynos/exynos850-e850-96.dts b/arch/arm64/boot/dts/exynos/exynos850-e850-96.dts
index 8d733361ef821..f074df8982b3e 100644
--- a/arch/arm64/boot/dts/exynos/exynos850-e850-96.dts
+++ b/arch/arm64/boot/dts/exynos/exynos850-e850-96.dts
@@ -141,6 +141,21 @@
gpio = <&gpa3 5 GPIO_ACTIVE_LOW>;
};
+ reserved-memory {
+ #address-cells = <2>;
+ #size-cells = <1>;
+ ranges;
+
+ ramoops@f0000000 {
+ compatible = "ramoops";
+ reg = <0x0 0xf0000000 0x200000>;
+ record-size = <0x20000>;
+ console-size = <0x20000>;
+ ftrace-size = <0x100000>;
+ pmsg-size = <0x20000>;
+ };
+ };
+
/*
* RTC clock (XrtcXTI); external, must be 32.768 kHz.
*