workflows: Add weekly U-Boot build for RB1

Resulting binaries are uploaded to fileserver and can be used in image
generation jobs.

Signed-off-by: Loïc Minier <[email protected]>

Author: lool

.github/workflows/u-boot.yml

@@ -0,0 +1,93 @@
+name: U-Boot Android boot image for RB1
+
+on:
+  # run on pull requests to the main branch
+  pull_request:
+    branches: [main]
+  # run on pushes to the main branch
+  push:
+    branches: [main]
+  # run weekly on Monday at 8:30am
+  schedule:
+    - cron: '30 8 * * 1'
+  # allow manual runs
+  workflow_dispatch:
+
+# only need permission to read repository; implicitely set all other
+# permissions to none
+permissions:
+  contents: read
+
+env:
+  # where results will be posted/hosted
+  FILESERVER_URL: https://quic-yocto-fileserver-1029608027416.us-central1.run.app
+  # github runs are only unique per repository and may also be re-run; create a
+  # build id for the current run
+  BUILD_ID: ${{ github.repository }}-${{ github.run_id }}-${{ github.run_attempt }}
+
+# cancel in progress builds for this workflow triggered by the same ref
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  build-u-boot-rb1:
+    # TODO test whether this builds on x86 too
+    # XXX currently missing docker
+    #runs-on: [self-hosted, x86]
+    runs-on: [self-hosted, arm64, debbuilder]
+    container:
+      image: debian:trixie
+      volumes:
+        - /srv/gh-runners/quic-yocto/builds:/fileserver-builds
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      # make sure we have latest packages first, to get latest fixes, to avoid
+      # an automated update while we're building, and to prevent version skews
+      - name: Update OS packages
+        run: |
+          set -ux
+          apt update
+          apt -y upgrade
+          apt -y full-upgrade
+
+      - name: Build U-Boot Android boot image for RB1
+        run:
+            set -ux
+            # install build-dependencies
+            apt -y install git crossbuild-essential-arm64 make bison flex bc \
+                libssl-dev gnutls-dev gzip mkbootimg
+            scripts/build-u-boot-rb1.sh
+
+      - name: Upload results to fileserver
+        run: |
+          set -ux
+          # curl will be used to talk to fileserver; should be installed by
+          # default
+          apt -y install curl
+          # create directory for results on fileserver
+          dir="/fileserver-builds/${BUILD_ID}"
+          mkdir -vp "${dir}"
+          # copy output files
+          cp -av \
+              u-boot/u-boot-nodtb.bin \
+              u-boot/u-boot-nodtb.bin.gz \
+              u-boot/dts/upstream/src/arm64/qcom/qrb2210-rb1.dtb \
+              u-boot/u-boot-nodtb.bin.gz-dtb \
+              u-boot/u-boot.bin \
+              u-boot/rb1-boot.img \
+              "${dir}"
+          # instruct fileserver to publish this directory
+          url="${FILESERVER_URL}/${BUILD_ID}/"
+          curl -X POST -H 'Accept: text/event-stream' "${url}"
+          # create file with URL of these results
+          echo "${url}" >u-boot-rb1.url
+
+      - name: Save URL of build results as an artifact
+        uses: actions/upload-artifact@v4
+        with:
+          path: u-boot-rb1.url
+

scripts/build-u-boot-rb1.sh

@@ -0,0 +1,65 @@
+#!/bin/sh
+
+set -eux
+
+GIT_REPO="https:////github.com/b49020/u-boot"
+GIT_BRANCH="qcom-mainline"
+CONFIG="qcom_defconfig"
+U_BOOT_DEVICE_TREE="qcom/qrb2210-rb1"
+ABOOT_BASE_ADDRESS="0x80000000"
+ABOOT_PAGE_SIZE="4096"
+ABOOT_OUTPUT="rb1-boot.img"
+
+log_i() {
+    echo "I: $*" >&2
+}
+
+fatal() {
+    echo "F: $*" >&2
+    exit 1
+}
+
+# needed to clone repository
+packages="git"
+# will pull gcc-aarch64-linux-gnu; should pull a native compiler on arm64 and
+# a cross-compiler on other architectures
+packages="$packages crossbuild-essential-arm64"
+# u-boot build-dependencies
+packages="$packages make bison flex bc libssl-dev gnutls-dev"
+# needed to pack resulting u-boot binary into an Android boot image
+packages="$packages gzip mkbootimg"
+
+log_i "Checking build-dependencies ($packages)"
+missing=""
+for pkg in $packages; do
+    if ! dpkg -l "${pkg}" 2>&1 | grep -q "^ii  ${pkg}"; then
+        missing="${missing} ${pkg}"
+    fi
+done
+if [ -n "${missing}" ]; then
+    fatal "Missing build-dependencies: ${missing}"
+fi
+
+log-i "Cloning U-Boot (${GIT_REPO}:${GIT_BRANCH})"
+git clone --depth=0 --branch "${GIT_BRANCH}" "${GIT_REPO}" u-boot
+
+cd u-boot
+
+log-i "Configuring U-Boot (${CONFIG})"
+make "${CONFIG}"
+
+log-i "Building U-Boot (with device tree ${U_BOOT_DEVICE_TREE})"
+make -j`nproc` DEVICE_TREE="${U_BOOT_DEVICE_TREE}"
+
+log_i "Creating Android boot image (${ABOOT_OUTPUT})"
+gzip u-boot-nodtb.bin
+cat u-boot-nodtb.bin.gz \
+    "dts/upstream/src/arm64/qcom/${U_BOOT_DEVICE_TREE}.dtb" \
+    >u-boot-nodtb.bin.gz-dtb
+mkbootimg --base "${ABOOT_BASE_ADDRESS}" \
+    --pagesize "${ABOOT_PAGE_SIZE}" \
+    --kernel u-boot-nodtb.bin.gz-dtb  \
+    --cmdline "root=/dev/notreal" \
+    --ramdisk u-boot.bin \
+    --output "${ABOOT_OUTPUT}"
+