From 67cfbb62132e4210b4c4785b0ca1fbe4cafb7c4d Mon Sep 17 00:00:00 2001 From: Suman Anna Date: Tue, 25 Aug 2020 12:21:45 -0500 Subject: [PATCH] arm64: dts: ti: k3-j721e-som-p0: Reserve memory for IPC between RTOS cores Add a reserved memory node to reserve a portion of the DDR memory to be used for performing inter-processor communication between all the remote processors running RTOS on the TI J721E EVM boards. 28 MB of memory is reserved for this purpose, and this accounts for all the vrings and vring buffers between all the possible pairs of remote processors. Signed-off-by: Suman Anna Signed-off-by: Nishanth Menon Reviewed-by: Lokesh Vutla Link: https://lore.kernel.org/r/20200825172145.13186-9-s-anna@ti.com --- arch/arm64/boot/dts/ti/k3-j721e-som-p0.dtsi | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/arm64/boot/dts/ti/k3-j721e-som-p0.dtsi b/arch/arm64/boot/dts/ti/k3-j721e-som-p0.dtsi index 0e28be492ac28..d69d90c8b5e38 100644 --- a/arch/arm64/boot/dts/ti/k3-j721e-som-p0.dtsi +++ b/arch/arm64/boot/dts/ti/k3-j721e-som-p0.dtsi @@ -61,6 +61,12 @@ reg = <0x00 0xa8100000 0x00 0xf00000>; no-map; }; + + rtos_ipc_memory_region: ipc-memories@aa000000 { + reg = <0x00 0xaa000000 0x00 0x01c00000>; + alignment = <0x1000>; + no-map; + }; }; }; -- 2.30.2