From 87337b9da8842846d48fdda3033f10939f6ddf41 Mon Sep 17 00:00:00 2001
From: Tomaz Zaman <tomaz@mono.si>
Date: Mon, 10 Aug 2026 13:51:12 +0200
Subject: [PATCH 06/72] layerscape: add Mono Gateway DK device and eMMC image

GPT with the entry array relocated to 5 MiB (stock ptgen -e) so the
header ends at 1 KiB and the raw boot-firmware region (PBL@4K, FIP@1M,
env@3M, FMan ucode@4M) stays untouched; partitions start at 32 MiB:
boot ext4 (/boot/extlinux for the U-Boot sysboot flow, Image.gz + dtb)
then squashfs rootfs. KERNEL_NAME=Image because booti cannot boot the
target default vmlinux ELF.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
---
 target/linux/layerscape/image/armv8_64b.mk    | 32 +++++++++++++++++++
 .../layerscape/image/gen_mono_emmc_img.sh     | 32 +++++++++++++++++++
 2 files changed, 64 insertions(+)
 create mode 100755 target/linux/layerscape/image/gen_mono_emmc_img.sh

diff --git a/target/linux/layerscape/image/armv8_64b.mk b/target/linux/layerscape/image/armv8_64b.mk
index 6c486e73fa..ff58009063 100644
--- a/target/linux/layerscape/image/armv8_64b.mk
+++ b/target/linux/layerscape/image/armv8_64b.mk
@@ -406,3 +406,35 @@ define Device/traverse_ten64_mtd
 endef
 TARGET_DEVICES += traverse_ten64_mtd
 
+# Boot partition for the Mono Gateway: ext4 with /boot/extlinux for the
+# QSPI/eMMC U-Boot's `sysboot mmc 0:1 any ... /boot/extlinux/extlinux.conf`
+define Build/mono-bootfs
+	rm -rf $@.bootdir $@.bootfs
+	mkdir -p $@.bootdir/boot/extlinux
+	$(CP) $(IMAGE_KERNEL) $@.bootdir/boot/Image.gz
+	$(CP) $(DEVICE_DTS_DIR)/$(DEVICE_DTS).dtb $@.bootdir/boot/
+	printf 'label OpenWrt\n\tkernel /boot/Image.gz\n\tfdt /boot/%s.dtb\n\tappend root=/dev/mmcblk0p2 rootwait console=ttyS0,115200 earlycon=uart8250,mmio,0x21c0500\n' \
+		"$(DEVICE_DTS)" > $@.bootdir/boot/extlinux/extlinux.conf
+	truncate -s $(MONO_BOOTFS_SIZE)M $@.bootfs
+	$(STAGING_DIR_HOST)/bin/mkfs.ext4 -F -L boot -d $@.bootdir $@.bootfs
+endef
+
+define Build/mono-emmc-img
+	rm -f $@
+	./gen_mono_emmc_img.sh $@ $@.bootfs $(IMAGE_ROOTFS) \
+		$(MONO_BOOTFS_SIZE) $(CONFIG_TARGET_ROOTFS_PARTSIZE)
+endef
+
+define Device/mono_gateway-dk
+  DEVICE_VENDOR := Mono
+  DEVICE_MODEL := Gateway DK
+  DEVICE_PACKAGES := kmod-ask-cdx kmod-ask-fci kmod-ask-auto-bridge \
+	cmm dpa-app fmc
+  KERNEL_NAME := Image
+  KERNEL := kernel-bin | gzip
+  MONO_BOOTFS_SIZE := 64
+  IMAGES := emmc.img.gz
+  IMAGE/emmc.img.gz := mono-bootfs | mono-emmc-img | gzip | append-metadata
+endef
+TARGET_DEVICES += mono_gateway-dk
+
diff --git a/target/linux/layerscape/image/gen_mono_emmc_img.sh b/target/linux/layerscape/image/gen_mono_emmc_img.sh
new file mode 100755
index 0000000000..92d37d004d
--- /dev/null
+++ b/target/linux/layerscape/image/gen_mono_emmc_img.sh
@@ -0,0 +1,32 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Mono Gateway eMMC image:
+#   - 8-entry-equivalent GPT: header at LBA0/1, entry array relocated to
+#     5 MiB (-e 5120) so the LS1046A boot firmware region stays clear:
+#     PBL@4K, FIP@1M, U-Boot env@3M, FMan ucode@4M (raw, dd'd by the
+#     factory flow / write_uboot_platform - NOT part of this image)
+#   - partition 1 (boot, ext4: /boot/extlinux + Image.gz + dtb) at 32 MiB
+#   - partition 2 (rootfs) right after
+#
+set -ex
+[ $# -eq 5 ] || {
+    echo "SYNTAX: $0 <file> <bootfs image> <rootfs image> <bootfs size MB> <rootfs size MB>"
+    exit 1
+}
+
+OUTPUT="$1"
+BOOTFS="$2"
+ROOTFS="$3"
+BOOTFSSIZE="$4"
+ROOTFSSIZE="$5"
+
+set $(ptgen -o $OUTPUT -v -g -e 5120 \
+    -N boot -p ${BOOTFSSIZE}M@32M \
+    -N rootfs -p ${ROOTFSSIZE}M)
+
+BOOTOFFSET=$(($1 / 512))
+ROOTFSOFFSET=$(($3 / 512))
+
+dd bs=512 if="$BOOTFS" of="$OUTPUT" seek=${BOOTOFFSET} conv=notrunc
+dd bs=512 if="$ROOTFS" of="$OUTPUT" seek=${ROOTFSOFFSET} conv=notrunc
-- 
2.47.3