linux-kernel - [PATCH v2] arm64: dts: ti: k3-am64-main: Add SYSFW reserved ranges in OCRAM

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Message-ID: <20210611191718.20065-1-vigneshr@ti.com>
Date:   Sat, 12 Jun 2021 00:47:18 +0530
From:   Vignesh Raghavendra <vigneshr@...com>
To:     Nishanth Menon <nm@...com>
CC:     Tero Kristo <kristo@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Vignesh Raghavendra <vigneshr@...com>
Subject: [PATCH v2] arm64: dts: ti: k3-am64-main: Add SYSFW reserved ranges in OCRAM

Last 256K of OCRAM (256K@...01c0000) is reserved for SYSFW usage. Hence
add an entry in DT so that its not used for generic pool memory
allocation.

Without this certain drivers using SRAM as generic shared memory pool
may end up being allocated memory from this range and will lead to boot
time crash when the reserved range is accessed (due to firewall
violation).

Signed-off-by: Vignesh Raghavendra <vigneshr@...com>
Reviewed-by: Lokesh Vutla <lokeshvutla@...com>
---

v2:
Rebase onto latest ti-k3-next
Collect R-by

 arch/arm64/boot/dts/ti/k3-am64-main.dtsi | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am64-main.dtsi b/arch/arm64/boot/dts/ti/k3-am64-main.dtsi
index 309826bf46b3..b731119f58ca 100644
--- a/arch/arm64/boot/dts/ti/k3-am64-main.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am64-main.dtsi
@@ -27,6 +27,10 @@ oc_sram: sram@...00000 {
 		atf-sram@...000 {
 			reg = <0x1a0000 0x1c000>;
 		};
+
+		dmsc-sram@...000 {
+			reg = <0x1c0000 0x40000>;
+		};
 	};
 
 	main_conf: syscon@...00000 {
-- 
2.32.0