linux-kernel - [PATCH v1] arm64: dts: meson-axg: reserve memory region for Amlogic TrustOS

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Date:   Thu, 4 Aug 2022 16:52:59 +0000
From:   Dmitry Rokosov <DDRokosov@...rdevices.ru>
To:     "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "krzysztof.kozlowski+dt@...aro.org" 
        <krzysztof.kozlowski+dt@...aro.org>,
        "narmstrong@...libre.com" <narmstrong@...libre.com>,
        "khilman@...libre.com" <khilman@...libre.com>,
        "jbrunet@...libre.com" <jbrunet@...libre.com>,
        "martin.blumenstingl@...glemail.com" 
        <martin.blumenstingl@...glemail.com>
CC:     "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-amlogic@...ts.infradead.org" 
        <linux-amlogic@...ts.infradead.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        kernel <kernel@...rdevices.ru>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Dmitry Rokosov <DDRokosov@...rdevices.ru>
Subject: [PATCH v1] arm64: dts: meson-axg: reserve memory region for Amlogic
 TrustOS

For the all AXG SoC based boards, which run Amlogic vendor ATF and
TrustOS this memory region 0x5300000-0x6300000 is reserved by BL32,
so tag it as no-map in the kernel iomem.

Signed-off-by: Dmitry Rokosov <ddrokosov@...rdevices.ru>
---
 arch/arm64/boot/dts/amlogic/meson-axg.dtsi | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/meson-axg.dtsi b/arch/arm64/boot/dts/amlogic/meson-axg.dtsi
index 3f5254eeb47b..1fa0d3805969 100644
--- a/arch/arm64/boot/dts/amlogic/meson-axg.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-axg.dtsi
@@ -142,6 +142,12 @@ secmon_reserved: secmon@...0000 {
 			reg = <0x0 0x05000000 0x0 0x300000>;
 			no-map;
 		};
+
+		/* 16 MiB reserved for Amlogic Trust OS (BL32) */
+		secos_reserved: secos@...0000 {
+			reg = <0x0 0x05300000 0x0 0x1000000>;
+			no-map;
+		};
 	};
 
 	scpi {
-- 
2.36.0