From 2d305094f8f500362079e9e7637d46129bf980e4 Mon Sep 17 00:00:00 2001 From: Adam Johnston 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 --- 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