linux-kernel - [PATCH] arm64: dts: marvell: armada

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Date:   Tue, 13 Nov 2018 14:48:07 +0100
From:   Emmanuel Vadot <manu@...ebsd.org>
To:     jason@...edaemon.net, andrew@...n.ch, gregory.clement@...tlin.com,
        sebastian.hesselbarth@...il.com, robh+dt@...nel.org,
        mark.rutland@....com
Cc:     linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Emmanuel Vadot <manu@...ebsd.org>
Subject: [PATCH] arm64: dts: marvell: armada_8k: reserve memory for ATF

Like 4436a371 for 37xx, reserve the PSCI area memory region so kernels
can call the code there.
Region address is taken from the ATF code [1] and is 2MiB aligned.

[1] plat/marvell/a8k/common/include/platform_def.h

Signed-off-by: Emmanuel Vadot <manu@...ebsd.org>
---
 arch/arm64/boot/dts/marvell/armada-ap806.dtsi | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/arch/arm64/boot/dts/marvell/armada-ap806.dtsi b/arch/arm64/boot/dts/marvell/armada-ap806.dtsi
index 073610ac0a53..d8a79bb69de1 100644
--- a/arch/arm64/boot/dts/marvell/armada-ap806.dtsi
+++ b/arch/arm64/boot/dts/marvell/armada-ap806.dtsi
@@ -23,6 +23,21 @@
 		spi0 = &spi0;
 	};
 
+	reserved-memory {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		/*
+		 * The PSCI firmware region depicted below is the default one
+		 * and should be updated by the bootloader.
+		 */
+		psci-area@...0000 {
+			reg = <0 0x4000000 0 0x200000>;
+			no-map;
+		};
+	};
+
 	psci {
 		compatible = "arm,psci-0.2";
 		method = "smc";
-- 
2.19.0