1 files changed, 28 insertions, 0 deletions
diff --git a/target/linux/sifiveu/image/gen_sifiveu_sdcard_img.sh b/target/linux/sifiveu/image/gen_sifiveu_sdcard_img.sh
new file mode 100755
index 0000000000..172f62485d
--- /dev/null
+++ b/target/linux/sifiveu/image/gen_sifiveu_sdcard_img.sh
@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# Copyright (C) 2022 OpenWrt.org
+#
+
+set -ex
+[ $# -eq 7 ] || {
+    echo "SYNTAX: $0 <file> <bootfs image> <rootfs image> <bootfs size> <rootfs size> <u-boot ITB image> <u-boot SPL>"
+    exit 1
+}
+
+OUTPUT="$1"
+BOOTFS="$2"
+ROOTFS="$3"
+BOOTFSSIZE="$4"
+ROOTFSSIZE="$5"
+UBOOT="$6"
+UBOOT_SPL="$7"
+
+set $(ptgen -o $OUTPUT -v -g -T sifiveu_spl -N loader1 -p 1024 -T sifiveu_uboot -N loader2 -p 4096 -t ef -N boot -p ${BOOTFSSIZE}M -N rootfs -p ${ROOTFSSIZE}M)
+
+ROOTFSOFFSET=$(($7 / 512))
+
+dd bs=512 if="$UBOOT_SPL" of="$OUTPUT" seek=34 conv=notrunc
+dd bs=512 if="$UBOOT" of="$OUTPUT" seek=2082 conv=notrunc
+dd bs=512 if="$BOOTFS" of="$OUTPUT" seek=10274 conv=notrunc
+dd bs=512 if="$ROOTFS" of="$OUTPUT" seek=${ROOTFSOFFSET} conv=notrunc