riscv: Add support to build Microchip Icicle Kit image

Signed-off-by: Alexandre Ghiti <alexandre.ghiti@canonical.com>

live-build/auto/config

@@ -352,7 +352,7 @@ fi
 # one also must request disk1-img-xz image format
 if [ "$IMAGEFORMAT" = "ext4" ] && [ "$PROJECT" = "ubuntu-cpc" ]; then
 	case $ARCH:$SUBARCH in
-		armhf:raspi2|riscv64:sifive_*|riscv64:nezha|riscv64:visionfive|riscv64:licheerv|*:generic)
+		armhf:raspi2|riscv64:sifive_*|riscv64:nezha|riscv64:visionfive|riscv64:licheerv|riscv64:icicle|*:generic)
 			IMAGE_HAS_HARDCODED_PASSWORD=1
 			if [ -z "${IMAGE_TARGETS:-}" ]; then
 				export IMAGE_TARGETS="disk1-img-xz"

live-build/ubuntu-cpc/hooks.d/base/disk-image-uefi.binary

@@ -97,6 +97,20 @@ create_partitions() {
                        --change-name=12:CIDATA \
                        --new=1:: \
                        --attributes=1:set:2
+            elif [ "${SUBARCH:-}" = "icicle" ]; then
+                # Microchip Icicle Kit
+                sgdisk "${disk_image}" \
+                       --set-alignment=2 \
+                       --new=13:256:25575 \
+                       --change-name=13:loader \
+                       --typecode=13:ef02 \
+                       --new=15::+106M \
+                       --typecode=15:ef00 \
+                       --change-name=15:ESP \
+                       --new=12::+4M \
+                       --change-name=12:CIDATA \
+                       --new=1:: \
+                       --attributes=1:set:2
             elif [ "${SUBARCH:-}" = "visionfive" ]; then
                 # VisionFive
                 sgdisk "${disk_image}" \
@@ -227,6 +241,35 @@ install_grub() {
             if [ -n "${SUBARCH:-}" ]; then
                 # Per-device images
                 case "${SUBARCH}" in
+                    "icicle")
+                        echo "Installing GRUB for ${SUBARCH} board" &1>2
+                        # flash-kernel is needed to install the dtb for update-grub: it uses the
+                        # /proc/device-tree/model value to pick the correct dtb and as we are in a chroot,
+                        # the model value is wrong and we need to use /etc/flash-kernel/machine instead.
+                        # This explains why we install flash-kernel here.
+                        chroot mountpoint mkdir -p /etc/flash-kernel/
+                        chroot mountpoint bash -c "echo 'Microchip PolarFire-SoC Icicle Kit' > /etc/flash-kernel/machine"
+                        chroot mountpoint bash -c 'FK_FORCE_CONTAINER=yes apt-get install -qqy grub-efi-riscv64 flash-kernel'
+                        efi_target=riscv64-efi
+                        # The real U-Boot
+                        chroot mountpoint apt-get install -qqy u-boot-microchip
+                        loader="/dev/mapper${loop_device///dev/}p13"
+                        dd if=mountpoint/usr/lib/u-boot/microchip_icicle/u-boot.payload of=$loader
+                        # Provide end-user modifyable CIDATA
+                        cidata_dev="/dev/mapper${loop_device///dev/}p12"
+                        setup_cidata "${cidata_dev}"
+                        # Provide stock nocloud datasource
+                        # Allow interactive login on baremetal board,
+                        # without a cloud datasource.
+                        setup_cinocloud mountpoint
+
+                        # u-boot-microchip will boot using UEFI if it does not find
+                        # any extlinux.conf or boot.scr: but flash-kernel will
+                        # install a boot.scr if it believes it did not boot in
+                        # EFI mode, so make sure we don't leave a boot.scr
+                        # behind.
+                        chroot mountpoint rm -f /boot/boot.scr
+                        ;;
                     "nezha"|"licheerv")
                         echo "Installing U-Boot for ${SUBARCH} board" &1>2
                         # flash-kernel is needed to install the dtb for update-grub: it uses the
@@ -350,7 +393,7 @@ EOF
                 chroot mountpoint u-boot-update
             fi
 
-            if [ "${SUBARCH:-}" != "visionfive" ] && [ "${SUBARCH:-}" != "nezha" ] && [ "${SUBARCH:-}" != "licheerv" ]; then
+            if [ "${SUBARCH:-}" != "visionfive" ] && [ "${SUBARCH:-}" != "nezha" ] && [ "${SUBARCH:-}" != "licheerv" ] && [ "${SUBARCH:-}" != "icicle" ]; then
                 ## TODO remove below once we have grub-efi-riscv64 for the platforms
                 rm mountpoint/tmp/device.map
                 umount mountpoint/boot/efi