[PATCH 5/5] arm64: dts: ti: k3-j7200-som-p0: Reserve memory for IPC between RTOS cores

[Suman Anna]

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 J7200 EVM boards. 8 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.

NOTE:
The J7200 SoCs have no DSPs and one less R5F cluster compared to J721E
SoCs. So, while the carveout memories reserved for the R5F clusters
present on the SoC match to those on J721E, the overall memory map
reserved for firmwares is quite different.

Signed-off-by: Suman Anna <s-anna at ti.com>
---
 arch/arm64/boot/dts/ti/k3-j7200-som-p0.dtsi | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-j7200-som-p0.dtsi b/arch/arm64/boot/dts/ti/k3-j7200-som-p0.dtsi
index 69db8e77f659..a988e2ab2ba1 100644
--- a/arch/arm64/boot/dts/ti/k3-j7200-som-p0.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-j7200-som-p0.dtsi
@@ -73,6 +73,12 @@ main_r5fss0_core1_memory_region: r5f-memory at a3100000 {
 			reg = <0x00 0xa3100000 0x00 0xf00000>;
 			no-map;
 		};
+
+		rtos_ipc_memory_region: ipc-memories at a4000000 {
+			reg = <0x00 0xa4000000 0x00 0x00800000>;
+			alignment = <0x1000>;
+			no-map;
+		};
 	};
 };
 
-- 
2.29.2