board: add Nuvoton MA35D1 NuMaker IoT board support

config/boards/numaker-iot-ma35d16f90.csc

@@ -0,0 +1,17 @@
+# Dual-core Cortex-A35 + Cortex-M4, 512MB DDR
+BOARD_NAME="NuMaker IoT MA35D16F90"
+BOARD_VENDOR="nuvoton"
+BOARDFAMILY="nuvoton-ma35d1"
+# SD card boot (sdcard1 = SD1 slot on NuMaker IoT board)
+BOOTCONFIG="ma35d1_sdcard1_defconfig"
+KERNEL_TARGET="vendor"
+FULL_DESKTOP="no"
+BOOT_LOGO="no"
+BOOT_FDT_FILE="nuvoton/ma35d1-iot-512m.dtb"
+BOOT_SCENARIO="blobless"
+IMAGE_PARTITION_TABLE="msdos"
+DEFAULT_CONSOLE="serial"
+SERIALCON="ttyS0:115200"
+
+# Hardware features
+HAS_VIDEO_OUTPUT="yes"

config/bootenv/nuvoton-ma35d1.txt

@@ -0,0 +1,2 @@
+bootlogo=false
+console=serial

config/bootscripts/boot-nuvoton-ma35d1.cmd

@@ -0,0 +1,155 @@
+# DO NOT EDIT THIS FILE
+#
+# Please edit /boot/armbianEnv.txt to set supported parameters
+#
+# Nuvoton MA35D1 boot script for Armbian
+
+setenv overlay_error "false"
+# default values
+setenv rootdev "LABEL=armbi_root"
+setenv verbosity "1"
+setenv console "serial"
+setenv bootlogo "false"
+setenv rootfstype "ext4"
+setenv docker_optimizations "on"
+setenv earlycon "off"
+
+# MA35D1 memory map - load addresses
+# Memory layout (avoiding overlaps):
+#   0x80000000 - Kernel (~15MB, ends ~0x80F00000)
+#   0x81000000 - Temp load address for env/overlays
+#   0x82000000 - Ramdisk (~20MB max, ends ~0x83400000)
+#   0x84000000 - DTB (~64KB)
+setenv load_addr "0x81000000"
+setenv kernel_addr_r "0x80000000"
+setenv ramdisk_addr_r "0x82000000"
+setenv fdt_addr_r "0x84000000"
+
+# Set default fdtfile if not set by U-Boot
+test -n "${fdtfile}" || setenv fdtfile "nuvoton/ma35d1-iot-512m.dtb"
+
+test -n "${distro_bootpart}" || setenv distro_bootpart 1
+
+echo "Boot script loaded from ${devtype} ${devnum}:${distro_bootpart}"
+
+# get PARTUUID of first partition on SD/eMMC the boot script was loaded from
+echo "Detecting PARTUUID for ${devtype} device ${devnum}:${distro_bootpart}..."
+setenv partuuid
+
+if test "${devtype}" = "mmc"; then
+	part uuid ${devtype} ${devnum}:${distro_bootpart} partuuid
+fi
+
+# Use PARTUUID if available (more reliable), otherwise fall back to rootdev label
+if test -n "${partuuid}"; then
+	setenv rootdev "PARTUUID=${partuuid}"
+fi
+
+# Load armbianEnv.txt if it exists
+echo "Attempting to load ${prefix}armbianEnv.txt from ${devtype} ${devnum}:${distro_bootpart} to ${load_addr}..."
+if load ${devtype} ${devnum}:${distro_bootpart} ${load_addr} ${prefix}armbianEnv.txt; then
+	echo "Successfully loaded armbianEnv.txt (${filesize} bytes)"
+	if env import -t ${load_addr} ${filesize}; then
+		echo "Successfully imported environment from armbianEnv.txt"
+	else
+		echo "Warning: Failed to import environment from armbianEnv.txt"
+	fi
+else
+	echo "armbianEnv.txt not found or failed to load - using default environment"
+fi
+
+echo "Final rootdev: ${rootdev}"
+
+# Set console arguments
+setenv consoleargs ""
+if test "${console}" = "display" || test "${console}" = "both"; then
+	setenv consoleargs "console=tty1 ${consoleargs}"
+fi
+if test "${console}" = "serial" || test "${console}" = "both"; then
+	setenv consoleargs "console=ttyS0,115200n8 ${consoleargs}"
+fi
+if test "${earlycon}" = "on"; then
+	setenv consoleargs "earlycon ${consoleargs}"
+fi
+
+if test "${bootlogo}" = "true"; then
+	setenv consoleargs "splash plymouth.ignore-serial-consoles ${consoleargs}"
+else
+	setenv consoleargs "splash=verbose ${consoleargs}"
+fi
+
+# MA35D1 specific: limit kernel memory if needed (for OP-TEE reserved memory)
+# OP-TEE reserves 0x8f800000-0x90000000 (8MB)
+setenv bootargs "root=${rootdev} rootwait rootfstype=${rootfstype} ${consoleargs} consoleblank=0 loglevel=${verbosity} ubootpart=${partuuid} ${extraargs} ${extraboardargs}"
+
+if test "${docker_optimizations}" = "on"; then
+	setenv bootargs "${bootargs} cgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory"
+fi
+
+echo "Final bootargs: ${bootargs}"
+
+# Load kernel
+echo "Loading kernel image to ${kernel_addr_r}..."
+if load ${devtype} ${devnum}:${distro_bootpart} ${kernel_addr_r} ${prefix}Image; then
+	echo "Kernel loaded successfully"
+else
+	echo "ERROR: Failed to load kernel!"
+	exit
+fi
+
+# Load initramfs
+echo "Loading initramfs to ${ramdisk_addr_r}..."
+if load ${devtype} ${devnum}:${distro_bootpart} ${ramdisk_addr_r} ${prefix}uInitrd; then
+	setenv ramdisk_arg "${ramdisk_addr_r}:${filesize}"
+	echo "Initramfs loaded successfully (${filesize} bytes)"
+else
+	echo "Warning: Failed to load initramfs, booting without it"
+	setenv ramdisk_arg "-"
+fi
+
+# Load device tree
+echo "Loading device tree ${fdtfile} to ${fdt_addr_r}..."
+if load ${devtype} ${devnum}:${distro_bootpart} ${fdt_addr_r} ${prefix}dtb/${fdtfile}; then
+	echo "DTB loaded successfully"
+else
+	echo "ERROR: Failed to load device tree!"
+	exit
+fi
+
+# Setup FDT for overlays
+fdt addr ${fdt_addr_r}
+fdt resize 65536
+
+# Apply overlays if specified
+for overlay_file in ${overlays}; do
+	if load ${devtype} ${devnum}:${distro_bootpart} ${load_addr} ${prefix}dtb/nuvoton/overlay/${overlay_file}.dtbo; then
+		echo "Applying kernel provided DT overlay ${overlay_file}.dtbo"
+		fdt apply ${load_addr} || setenv overlay_error "true"
+	fi
+done
+
+for overlay_file in ${user_overlays}; do
+	if load ${devtype} ${devnum}:${distro_bootpart} ${load_addr} ${prefix}overlay-user/${overlay_file}.dtbo; then
+		echo "Applying user provided DT overlay ${overlay_file}.dtbo"
+		fdt apply ${load_addr} || setenv overlay_error "true"
+	fi
+done
+
+if test "${overlay_error}" = "true"; then
+	echo "Error applying DT overlays, restoring original DT"
+	load ${devtype} ${devnum}:${distro_bootpart} ${fdt_addr_r} ${prefix}dtb/${fdtfile}
+	fdt addr ${fdt_addr_r}
+	fdt resize 65536
+fi
+
+# Resize FDT to actual size
+fdt resize
+
+echo "Booting kernel..."
+echo "  kernel:   ${kernel_addr_r}"
+echo "  initrd:   ${ramdisk_arg}"
+echo "  dtb:      ${fdt_addr_r}"
+booti ${kernel_addr_r} ${ramdisk_arg} ${fdt_addr_r}
+
+# Recompile with:
+# mkimage -C none -A arm -T script -d /boot/boot.cmd /boot/boot.scr