dtb: Add Xilinx baremetal demo compatible DTB for v6.5 kernel

The Xilinx baremetal apps as built by Xilinx v2023.2 use a different
mailbox configuration than the Zephyr examples do.

We wish to align these in the future but for now we need a different DTB.
We can not use the Xilinx v2023.2 built DTB as it is not compatible with
the upstream remoteproc driver (it is still using the pre-upstream driver.)

This change adds an overlay for this configuration and then also applies
it to make complete dtbs.  Boot configs can either apply the overlays at
boot time or use the complete dtbs.

Signed-off-by: Bill Mills <bill.mills@linaro.org>

examples/linux/dts/xilinx/Makefile

@@ -1,11 +1,12 @@
 # Build Devicetree Binaries and Devicetree Binary Overlays
 
 DTBS := zcu102-openamp-lockstep.dtb zcu102-openamp-split.dtb
-DTBS += kria-openamp-lockstep.dtb kria-openamp-split.dtb
+DTBS += kv260-openamp-lockstep.dtb kv260-openamp-split.dtb
 DTBS += zynqmp-smk-k26-revA.dtb zynqmp-zcu102-rev1.0.dtb
+DTBS += zcu102-xilinx-bm-lockstep.dtb kv260-xilinx-bm-lockstep.dtb
 
 DTBOS := zynqmp-split.dtbo zcu102-openamp.dtbo zynqmp-openamp.dtbo
-DTBOS += zynqmp-sck-kv-g-revB.dtbo
+DTBOS += zynqmp-sck-kv-g-revB.dtbo xilinx-openamp-for-v6.5.dtbo
 
 # any file to test we have a valid kernel source dir
 XILINX_DTS_DIR := $(LINUX_SRC_DIR)/arch/arm64/boot/dts/xilinx
@@ -86,5 +87,16 @@ kv260-openamp-split.dtb: \
 	zynqmp-split.dtbo
 	fdtoverlay -o $@ -i $(filter-out .linux-src-check,$^)
 
+zcu102-xilinx-bm-lockstep.dtb: \
+	zynqmp-zcu102-rev1.0.dtb \
+	xilinx-openamp-for-v6.5.dtbo \
+	zcu102-openamp.dtbo
+	fdtoverlay -o $@ -i $(filter-out .linux-src-check,$^)
+
+kv260-xilinx-bm-lockstep.dtb: \
+	zynqmp-smk-k26-revA.dtb zynqmp-sck-kv-g-revB.dtbo \
+	xilinx-openamp-for-v6.5.dtbo
+	fdtoverlay -o $@ -i $(filter-out .linux-src-check,$^)
+
 clean:
 	rm -f $(DTBS) $(DTBOS) $(DTBCS) *.pp .linux-src-check $(DTB_KERNEL_SRC)

examples/linux/dts/xilinx/xilinx-openamp-for-v6.5.dtso

@@ -0,0 +1,112 @@
+/* Applies to all zynqmp boards to configure the IPC & memory for OpenAMP */
+
+/dts-v1/;
+/plugin/;
+
+&{/} {
+	#address-cells = <2>;
+	#size-cells = <2>;
+
+	reserved-memory {
+		#address-cells = <0x02>;
+		#size-cells = <0x02>;
+		ranges;
+
+		rproc_0_fw_image: memory@3ed00000 {
+			no-map;
+			reg = <0x0 0x3ed00000 0x0 0x40000>;
+		};
+
+		rpu0vdev0vring0: vdev0vring0@3ed40000 {
+			no-map;
+			reg = <0x00 0x3ed40000 0x00 0x4000>;
+		};
+
+		rpu0vdev0vring1: vdev0vring1@3ed44000 {
+			no-map;
+			reg = <0x00 0x3ed44000 0x00 0x4000>;
+		};
+
+		rpu0vdev0buffer: vdev0buffer@3ed48000 {
+			no-map;
+			compatible = "shared-dma-pool";
+			reg = <0x00 0x3ed48000 0x00 0x100000>;
+		};
+
+	};
+
+	zynqmp_ipi1 {
+		compatible = "xlnx,zynqmp-ipi-mailbox";
+		interrupt-parent = <&gic>;
+		interrupts = <0x00 0x1d 0x04>;
+		xlnx,ipi-id = <0x07>;        /* bare-metal apps send on channel 7 */
+		#address-cells = <0x01>;
+		#size-cells = <0x01>;
+		ranges;
+
+		ipi_mailbox_rpu0: mailbox@ff990600 {
+			reg = <0xff990600 0x20>,
+			      <0xff990620 0x20>,
+			      <0xff9900c0 0x20>,
+			      <0xff9900e0 0x20>;
+			reg-names = "local_request_region",
+			            "local_response_region",
+				    "remote_request_region",
+				    "remote_response_region";
+			#mbox-cells = <0x01>;
+			xlnx,ipi-id = <0x01>;    /* host still sends to RPU0 on ch 1 */
+		};
+	};
+
+#if 0
+	zynqmp_ipi {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		ipi_mailbox_rpu0: mailbox@ff990040 {
+			reg = <0x00 0xff990040 0x00 0x20>,
+			      <0x00 0xff990060 0x00 0x20>,
+			      <0x00 0xff990200 0x00 0x20>,
+			      < 0x00 0xff990220 0x00 0x20>;
+			reg-names = "local_request_region",
+				    "local_response_region",
+				    "remote_request_region",
+				    "remote_response_region";
+			#mbox-cells = <0x01>;
+			xlnx,ipi-id = <0x01>;
+		};
+
+		ipi_mailbox_rpu1: mailbox@ff990080 {
+			reg = <0x00 0xff990420 0x00 0x20>,
+			      <0x00 0xff990440 0x00 0x20>,
+			      <0x00 0xff990260 0x00 0x20>,
+			      <0x00 0xff990280 0x00 0x20>;
+			reg-names = "local_request_region",
+				    "local_response_region",
+				    "remote_request_region",
+				    "remote_response_region";
+			#mbox-cells = <0x01>;
+			xlnx,ipi-id = <0x02>;
+		};
+	};
+#endif
+
+	remoteproc: remoteproc {
+		r5f-0 {
+			memory-region = <&rproc_0_fw_image>, <&rpu0vdev0vring0>,
+					<&rpu0vdev0vring1>, <&rpu0vdev0buffer>;
+			mboxes = <&ipi_mailbox_rpu0 0>, <&ipi_mailbox_rpu0 1>;
+			mbox-names = "tx", "rx";
+		};
+
+#if 0
+		r5f-1 {
+			memory-region = <&rproc_1_fw_image>, <&rpu1vdev1vring0>,
+					<&rpu1vdev1vring1>, <&rpu1vdev1buffer>;
+			mboxes = <&ipi_mailbox_rpu1 0>, <&ipi_mailbox_rpu1 1>;
+			mbox-names = "tx", "rx";
+		};
+#endif
+	};
+};