boards: imx93_evk: add M33 DDR code support

This commit adds the support for running
the Cortex M33 code from DDR memory.

Signed-off-by: Alexandru Lastur <[email protected]>

Author: alxlastur

boards/nxp/imx93_evk/Kconfig.imx93_evk

@@ -3,5 +3,5 @@
 
 config BOARD_IMX93_EVK
 	select SOC_MIMX9352_A55 if BOARD_IMX93_EVK_MIMX9352_A55
-	select SOC_MIMX9352_M33 if BOARD_IMX93_EVK_MIMX9352_M33
+	select SOC_MIMX9352_M33 if BOARD_IMX93_EVK_MIMX9352_M33 || BOARD_IMX93_EVK_MIMX9352_M33_DDR
 	select SOC_PART_NUMBER_MIMX9352DVVXM

boards/nxp/imx93_evk/board.yml

@@ -4,3 +4,6 @@ board:
   vendor: nxp
   socs:
   - name: mimx9352
+    variants:
+    - name: ddr
+      cpucluster: m33

boards/nxp/imx93_evk/doc/index.rst

@@ -240,10 +240,26 @@ prompt.
 
 Use U-Boot to load and kick zephyr.bin to Cortex-M33 Core:
 
+Boot with code from TCM
+=======================
+
 .. code-block:: console
 
     load mmc 1:1 0x80000000 zephyr.bin;cp.b 0x80000000 0x201e0000 0x30000;bootaux 0x1ffe0000 0
 
+Boot with code from DDR
+=======================
+
+.. code-block:: console
+
+    load mmc 1:1 0x84000000 zephyr.bin;dcache flush;bootaux 0x84000000 0
+
+Note: Cortex M33 need execute permission to run code from DDR memory. In order
+to enable this, `imx-atf`_ can to be modified in "plat/imx/imx93/trdc_config.h".
+
+.. _imx-atf:
+    https://github.com/nxp-imx/imx-atf
+
 Use this configuration to run basic Zephyr applications and kernel tests,
 for example, with the :zephyr:code-sample:`synchronization` sample:
 

boards/nxp/imx93_evk/imx93_evk_mimx9352_m33_ddr.dts

@@ -0,0 +1,23 @@
+/*
+ * Copyright 2024 NXP
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/dts-v1/;
+
+#include "imx93_evk_mimx9352_m33.dts"
+
+/ {
+	model = "NXP i.MX93 EVK board DDR variant";
+
+	chosen {
+		zephyr,sram = &ddr;
+		/delete-property/ zephyr,flash;
+	};
+
+	ddr: memory@84000000 {
+		device_type = "memory";
+		reg = <0x84000000 DT_SIZE_M(4)>;
+	};
+};

boards/nxp/imx93_evk/imx93_evk_mimx9352_m33_ddr.yaml

@@ -0,0 +1,16 @@
+# Copyright 2024 NXP
+# SPDX-License-Identifier: Apache-2.0
+
+identifier: imx93_evk/mimx9352/m33/ddr
+name: NXP i.MX93 EVK M33 DDR
+type: mcu
+arch: arm
+toolchain:
+  - zephyr
+  - cross-compile
+ram: 4096
+flash: 0
+supported:
+  - gpio
+  - uart
+vendor: nxp

boards/nxp/imx93_evk/imx93_evk_mimx9352_m33_ddr_defconfig

@@ -0,0 +1,9 @@
+# Copyright 2024 NXP
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_CLOCK_CONTROL=y
+CONFIG_SERIAL=y
+CONFIG_UART_CONSOLE=y
+CONFIG_UART_INTERRUPT_DRIVEN=y
+CONFIG_CONSOLE=y
+CONFIG_XIP=n