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From 2d305094f8f500362079e9e7637d46129bf980e4 Mon Sep 17 00:00:00 2001
From: Adam Johnston <adam.johnston@arm.com>
Date: Tue, 25 Jul 2023 16:05:51 +0000
Subject: [PATCH] n1sdp: Reserve OP-TEE memory from NWd
The physical memory which is used to run OP-TEE on the N1SDP is known
to the secure world via TOS_FW_CONFIG, but it may not be known to the
normal world.
As a precaution, explicitly reserve this memory via NT_FW_CONFIG to
prevent the normal world from using it. This is not required on most
platforms as the Trusted OS is run from secure RAM.
Upstream-Status: Pending (not yet submited to upstream)
Signed-off-by: Adam Johnston <adam.johnston@arm.com>
---
plat/arm/board/n1sdp/fdts/n1sdp_nt_fw_config.dts | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/plat/arm/board/n1sdp/fdts/n1sdp_nt_fw_config.dts b/plat/arm/board/n1sdp/fdts/n1sdp_nt_fw_config.dts
index da5e04ddb6..b7e2d4e86f 100644
--- a/plat/arm/board/n1sdp/fdts/n1sdp_nt_fw_config.dts
+++ b/plat/arm/board/n1sdp/fdts/n1sdp_nt_fw_config.dts
@@ -20,4 +20,16 @@
local-ddr-size = <0x0>;
remote-ddr-size = <0x0>;
};
+
+ reserved-memory {
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
+
+ optee@0x08000000 {
+ compatible = "removed-dma-pool";
+ reg = <0x0 0x08000000 0x0 0x02000000>;
+ no-map;
+ };
+ };
};
\ No newline at end of file
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