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labsi: add configs + scripts for SI labs
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‎configs/labsi-rpi4/build-uboot-image.sh‎

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#!/bin/bash
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# Builds a U-Boot only RaspberryPI image (with partitions)
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set -eo pipefail
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SRC_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/../../" && pwd)"
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source "$SRC_DIR/lib/common.sh"
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# image builder options
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DIST_DIR="$SRC_DIR/dist"
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TMP_DOWNLOAD_DIR="$BUILD_DEST/tmp"
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UBOOT_IMAGE_DEST=${UBOOT_IMAGE_DEST:-"$BUILD_DEST/u-boot-image.bin"}
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MOUNT_TMP="${MOUNT_TMP:-/tmp/rpi.mount}"
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IMAGE_SIZE_MB=150
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_lo_umount() {
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if [[ "$0" != "--force" && "$DEBUG" -gt 2 ]]; then return 0; fi
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log_info "Unmounting loopback device..."
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mountpoint -q "$MOUNT_TMP$RPI_FIRMWARE_DIR" && $SUDO umount "$MOUNT_TMP$RPI_FIRMWARE_DIR" || true
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mountpoint -q "$MOUNT_TMP" && $SUDO umount "$MOUNT_TMP" || true
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if [[ -n "$LO_DEV" ]]; then
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$SUDO losetup -d "$LO_DEV"
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else $SUDO losetup -D; fi
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}
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if [[ "$1" =~ ^(-u|--un?mount)$ ]]; then _lo_umount --force; exit 0; fi
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# reseve the image file
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dd if=/dev/zero of="$UBOOT_IMAGE_DEST" bs=1M count="$IMAGE_SIZE_MB"
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_PARTED_BOOT_START=1
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_PARTED_BOOT_END=$(( "$IMAGE_BOOT_PART_MB" + "$_PARTED_BOOT_START" ))
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log_info "Creating partitions..."
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log_debug \
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'1:' "${_PARTED_BOOT_START}MiB" "${_PARTED_BOOT_END}MiB" $'\n' \
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'2:' "${_PARTED_BOOT_END}MiB" "100%"
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parted --script "$UBOOT_IMAGE_DEST" \
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mklabel msdos \
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mkpart primary "${_PARTED_BOOT_START}MiB" "${_PARTED_BOOT_END}MiB" \
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type 1 0x0B set 1 boot on
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LO_DEV=$($SUDO losetup -f)
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$SUDO losetup -P "$LO_DEV" "$UBOOT_IMAGE_DEST"
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log_info "Loopback device $LO_DEV mapped to '$UBOOT_IMAGE_DEST'"
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trap _lo_umount EXIT
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if [[ ! -b "${LO_DEV}p1" ]]; then
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log_fatal "Image partition scanning failed!"
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fi
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log_info "Formatting boot partition..."
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$SUDO mkfs.vfat -n "$IMAGE_BOOT_PART_NAME" "${LO_DEV}p1"
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# use the /boot/firmware convention to split partitions
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$SUDO mkdir -p "$MOUNT_TMP"
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log_debug "mount ${LO_DEV}p1 $MOUNT_TMP"
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$SUDO mount "${LO_DEV}p1" "$MOUNT_TMP"
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mkdir -p "$TMP_DOWNLOAD_DIR"
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for file in "${RPI_FIRMWARE_FILES[@]}"; do
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# download the latest rpi firmware files (debian repo is outdated)
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wget "https://github.com/raspberrypi/firmware/raw/master/boot/$file" \
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-O "$TMP_DOWNLOAD_DIR/$file"
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$SUDO cp -f "$TMP_DOWNLOAD_DIR/$file" "$MOUNT_TMP/$file"
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done
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$SUDO cp -f "$DIST_DIR/labsi-rpi4/u-boot.bin" "$MOUNT_TMP/u-boot.bin"
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$SUDO cp -f "$DIST_DIR/labsi-rpi4/"*".dtb" "$MOUNT_TMP/"
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$SUDO cp -f "$CUSTOM_CONFIG_DIR/files/boot/config.txt" "$MOUNT_TMP/config.txt"
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log_debug $'Firmware files list: \n' "$(ls -lh "$MOUNT_TMP")"
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$SUDO du -hs "$MOUNT_TMP"
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echo "Successfully generated U-Boot image!"
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ls -l "$UBOOT_IMAGE_DEST"
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‎configs/labsi-rpi4/config.inc.sh‎

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# Embedded Systems Debian rootfs configuration for labs
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KERNEL_VERSION=${KERNEL_VERSION:-6.1}
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KERNEL_BRANCH="rpi-$KERNEL_VERSION.y"
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KERNEL_DEFCONFIG=${KERNEL_DEFCONFIG:-"bcm2711_defconfig"}
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UBOOT_DEFCONFIG=${UBOOT_DEFCONFIG:-"rpi_4_defconfig"}
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EXTRA_PACKAGES=(raspi-firmware linux-image-generic linux-headers-generic linux-libc-dev)
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SKIP_BOOT_FILES=y
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RPI_SKIP_IMAGE_GEN=1
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function rootfs_install_hook() {
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# copy custom install scripts to exec. dir
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cp -ar "$CUSTOM_CONFIG_DIR/install-scripts/"* "$INSTALL_SRC/scripts/"
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cp -ar "$CUSTOM_CONFIG_DIR/files/"* "$INSTALL_SRC/files/"
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}
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‎configs/labsi-rpi4/files/boot/config.txt‎

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# RPI BL2 `config.txt` file to run U-Boot
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# VPU boot settings
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boot_delay=1
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disable_overscan=1
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disable_splash=1
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# Use DesignWare Core 2 (SoC's USB 2.0 controller) for Linux OTG support
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dtoverlay=dwc2
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# Next stage config (run U-Boot)
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arm_64bit=1
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kernel=u-boot.bin
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enable_uart=1
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uart_2ndstage=1
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# include extra config, if any
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include extraconfig.txt

‎configs/labsi-rpi4/install-scripts/31-extra-configs.sh‎

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#!/bin/bash
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# need to configure raspi-firmware to use a specific ROOTPART
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CUSTOM_ROOTPART="/dev/mmcblk1p2"
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sed -i -E 's|^(#\s*)?ROOTPART=.*$|ROOTPART='"$CUSTOM_ROOTPART"'|' /etc/default/raspi-firmware
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‎configs/labsi-rpi4/install-scripts/51-extra-boot.sh‎

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#!/bin/bash
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# post-bootloader install hook
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# re-generate initramfs
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update-initramfs -u -k all
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‎rootfs-install/files/initramfs/rpi-post-update-hook‎

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if [[ -n "$RPI_SKIP_IMAGE_GEN" ]]; then
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# save config.txt to /boot
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interpolate_vars "$RPI_CONFIG" "${INTERPOLATE_VARS[@]}" > "/boot/config.txt"
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mkdir -p /boot/firmware
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download_firmware_files "/boot/firmware"
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interpolate_vars "$RPI_CONFIG" "${INTERPOLATE_VARS[@]}" > "/boot/firmware/config.txt"
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exit 0
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fi
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