linux-kernel - [PATCH RESEND 8/9] arm64: dts: marvell: samsung,coreprimevelte: Fill in memory node

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Message-Id: <20250913-pxa1908-dts-v1-8-8120cdc969b8@dujemihanovic.xyz>
Date: Sat, 13 Sep 2025 23:21:10 +0200
From: Duje Mihanović <dujemihanovic32@...il.com>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Kees Cook <kees@...nel.org>, 
 Tony Luck <tony.luck@...el.com>, 
 "Guilherme G. Piccoli" <gpiccoli@...lia.com>
Cc: Karel Balej <balejk@...fyz.cz>, David Wronek <david@...nlining.org>, 
 phone-devel@...r.kernel.org, ~postmarketos/upstreaming@...ts.sr.ht, 
 linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-hardening@...r.kernel.org, 
 Duje Mihanović <duje@...emihanovic.xyz>
Subject: [PATCH RESEND 8/9] arm64: dts: marvell: samsung,coreprimevelte:
 Fill in memory node

From: Duje Mihanović <duje@...emihanovic.xyz>

The board is known to have 1 GiB of DRAM with the first 16 MiB unusable.
Instead of relying on the bootloader to fill in the memory node, do it
ourselves.

Signed-off-by: Duje Mihanović <duje@...emihanovic.xyz>
---
 .../boot/dts/marvell/mmp/pxa1908-samsung-coreprimevelte.dts | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/marvell/mmp/pxa1908-samsung-coreprimevelte.dts b/arch/arm64/boot/dts/marvell/mmp/pxa1908-samsung-coreprimevelte.dts
index 13a726d86e65ad836166325e0958a6ec3e6d022e..b3741389e2ae056714ff4235b972bc72b5560455 100644
--- a/arch/arm64/boot/dts/marvell/mmp/pxa1908-samsung-coreprimevelte.dts
+++ b/arch/arm64/boot/dts/marvell/mmp/pxa1908-samsung-coreprimevelte.dts
@@ -30,13 +30,22 @@ fb0: framebuffer@...77000 {
 		};
 	};

-	/* Bootloader fills this in */
 	memory@0 {
 		device_type = "memory";
-		reg = <0 0 0 0>;
+		reg = <0 0 0 0x40000000>;
 	};

 	reserved-memory {
+		/*
+		 * Reserved by the vendor bootloader as a "secure region".
+		 *
+		 * TODO: See if the responsible stage of the bootloader can be
+		 * replaced
+		 */
+		secure-region@0 {
+			reg = <0 0 0 0x1000000>;
+		};
+
 		framebuffer@...00000 {
 			reg = <0 0x17000000 0 0x1800000>;
 			no-map;

-- 
2.51.0