linux-kernel - [PATCH v5 3/5] arm64: dts: ti: k3-am64 : Add M4F remote proc node

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Date:   Mon, 7 Aug 2023 23:45:27 -0500
From:   Hari Nagalla <hnagalla@...com>
To:     <andersson@...nel.org>, <mathieu.poirier@...aro.org>,
        <p.zabel@...gutronix.de>, <martyn.welch@...labora.com>,
        <nm@...com>, <vigneshr@...com>, <kristo@...nel.org>,
        <robh+dt@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
        <conor+dt@...nel.org>
CC:     <linux-remoteproc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>
Subject: [PATCH v5 3/5] arm64: dts: ti: k3-am64 : Add M4F remote proc node

The AM64x SoCs of the TI K3 family have a Cortex M4F core in the MCU
domain. This core can be used by non safety applications as a remote
processor. When used as a remote processor with virtio/rpmessage IPC,
two carveout reserved memory nodes are needed. The first region is used
as a DMA pool for the rproc device, and the second region will furnish
the static carveout regions for the firmware memory.

The current carveout addresses and sizes are defined statically for
each rproc device. The M4F processor do not have an MMU, and as such
require the exact memory used by the firmware to be set-aside.

Signed-off-by: Hari Nagalla <hnagalla@...com>
---
Changes in v5:
 - Add M4F device node patches to the patch list

 arch/arm64/boot/dts/ti/k3-am64-mcu.dtsi | 12 ++++++++++++
 arch/arm64/boot/dts/ti/k3-am642-evm.dts | 18 ++++++++++++++++++
 arch/arm64/boot/dts/ti/k3-am642-sk.dts  | 18 ++++++++++++++++++
 3 files changed, 48 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am64-mcu.dtsi b/arch/arm64/boot/dts/ti/k3-am64-mcu.dtsi
index 686d49790721..4151d0057bc8 100644
--- a/arch/arm64/boot/dts/ti/k3-am64-mcu.dtsi
+++ b/arch/arm64/boot/dts/ti/k3-am64-mcu.dtsi
@@ -158,4 +158,16 @@ mcu_esm: esm@...0000 {
 		reg = <0x00 0x4100000 0x00 0x1000>;
 		ti,esm-pins = <0>, <1>;
 	};
+
+	mcu_m4fss: m4fss@...0000 {
+		compatible = "ti,am64-m4fss";
+		reg = <0x00 0x5000000 0x00 0x30000>,
+		<0x00 0x5040000 0x00 0x10000>;
+		reg-names = "iram", "dram";
+		ti,sci = <&dmsc>;
+		ti,sci-dev-id = <9>;
+		ti,sci-proc-ids = <0x18 0xff>;
+		resets = <&k3_reset 9 1>;
+		firmware-name = "am64-mcu-m4f0_0-fw";
+	};
 };
diff --git a/arch/arm64/boot/dts/ti/k3-am642-evm.dts b/arch/arm64/boot/dts/ti/k3-am642-evm.dts
index d84e7ee16032..4fd1dc162534 100644
--- a/arch/arm64/boot/dts/ti/k3-am642-evm.dts
+++ b/arch/arm64/boot/dts/ti/k3-am642-evm.dts
@@ -99,6 +99,18 @@ main_r5fss1_core1_memory_region: r5f-memory@...00000 {
 			no-map;
 		};
 
+		mcu_m4fss_dma_memory_region: m4f-dma-memory@...00000 {
+			compatible = "shared-dma-pool";
+			reg = <0x00 0xa4000000 0x00 0x100000>;
+			no-map;
+		};
+
+		mcu_m4fss_memory_region: m4f-memory@...00000 {
+			compatible = "shared-dma-pool";
+			reg = <0x00 0xa4100000 0x00 0xf00000>;
+			no-map;
+		};
+
 		rtos_ipc_memory_region: ipc-memories@...00000 {
 			reg = <0x00 0xa5000000 0x00 0x00800000>;
 			alignment = <0x1000>;
@@ -639,6 +651,12 @@ &main_r5fss1_core1 {
 			<&main_r5fss1_core1_memory_region>;
 };
 
+&mcu_m4fss {
+	mboxes = <&mailbox0_cluster6>, <&mbox_m4_0>;
+	memory-region = <&mcu_m4fss_dma_memory_region>,
+			<&mcu_m4fss_memory_region>;
+};
+
 &serdes_ln_ctrl {
 	idle-states = <AM64_SERDES0_LANE0_PCIE0>;
 };
diff --git a/arch/arm64/boot/dts/ti/k3-am642-sk.dts b/arch/arm64/boot/dts/ti/k3-am642-sk.dts
index 963d796a3a97..f919dd5ba9ba 100644
--- a/arch/arm64/boot/dts/ti/k3-am642-sk.dts
+++ b/arch/arm64/boot/dts/ti/k3-am642-sk.dts
@@ -98,6 +98,18 @@ main_r5fss1_core1_memory_region: r5f-memory@...00000 {
 			no-map;
 		};
 
+		mcu_m4fss_dma_memory_region: m4f-dma-memory@...00000 {
+			compatible = "shared-dma-pool";
+			reg = <0x00 0xa4000000 0x00 0x100000>;
+			no-map;
+		};
+
+		mcu_m4fss_memory_region: m4f-memory@...00000 {
+			compatible = "shared-dma-pool";
+			reg = <0x00 0xa4100000 0x00 0xf00000>;
+			no-map;
+		};
+
 		rtos_ipc_memory_region: ipc-memories@...00000 {
 			reg = <0x00 0xa5000000 0x00 0x00800000>;
 			alignment = <0x1000>;
@@ -637,6 +649,12 @@ &main_r5fss1_core1 {
 			<&main_r5fss1_core1_memory_region>;
 };
 
+&mcu_m4fss {
+	mboxes = <&mailbox0_cluster6>, <&mbox_m4_0>;
+	memory-region = <&mcu_m4fss_dma_memory_region>,
+			<&mcu_m4fss_memory_region>;
+};
+
 &ecap0 {
 	status = "okay";
 	/* PWM is available on Pin 1 of header J3 */
-- 
2.34.1