1 files changed, 105 insertions, 0 deletions

diff --git a/meta-skeleton/recipes-baremetal/baremetal-examples/baremetal-helloworld_git.bb b/meta-skeleton/recipes-baremetal/baremetal-examples/baremetal-helloworld_git.bb
new file mode 100644
index 0000000000..d8633702fc
--- /dev/null
+++ b/meta-skeleton/recipes-baremetal/baremetal-examples/baremetal-helloworld_git.bb
@@ -0,0 +1,105 @@
+SUMMARY = "Baremetal examples to work with the several QEMU architectures supported on OpenEmbedded"
+HOMEPAGE = "https://github.com/aehs29/baremetal-helloqemu"
+LICENSE = "MIT"
+LIC_FILES_CHKSUM = "file://LICENSE;md5=39346640a23c701e4f459e05f56f4449"
+
+SRCREV = "99f4fa4a3b266b42b52af302610b0f4f429ba5e3"
+PV = "0.1+git${SRCPV}"
+
+SRC_URI = "git://github.com/aehs29/baremetal-helloqemu.git;protocol=https;branch=master"
+
+S = "${WORKDIR}/git/"
+
+# These examples are not meant to be built when using either musl or glibc
+COMPATIBLE_HOST_libc-musl_class-target = "null"
+COMPATIBLE_HOST_libc-glibc_class-target = "null"
+
+# This will be translated automatically to the architecture and
+# machine that QEMU uses on OE, e.g. -machine virt -cpu cortex-a57
+# but the examples can also be run on other architectures/machines
+# such as vexpress-a15 by overriding the setting on the machine.conf
+COMPATIBLE_MACHINE = "qemuarmv5|qemuarm|qemuarm64"
+
+BAREMETAL_QEMUARCH ?= ""
+BAREMETAL_QEMUARCH_qemuarmv5 = "versatile"
+BAREMETAL_QEMUARCH_qemuarm = "arm"
+BAREMETAL_QEMUARCH_qemuarm64 = "aarch64"
+
+
+EXTRA_OEMAKE_append = " QEMUARCH=${BAREMETAL_QEMUARCH} V=1"
+
+do_install(){
+    install -d ${D}/${datadir}
+    install -m 755 ${B}build/hello_baremetal_${BAREMETAL_QEMUARCH}.bin ${D}/${datadir}/hello_baremetal_${MACHINE}.bin
+    install -m 755 ${B}build/hello_baremetal_${BAREMETAL_QEMUARCH}.elf ${D}/${datadir}/hello_baremetal_${MACHINE}.elf
+}
+
+# Borrowed from meta-freertos
+inherit rootfs-postcommands
+inherit deploy
+do_deploy[dirs] = "${DEPLOYDIR} ${DEPLOY_DIR_IMAGE}"
+do_rootfs[dirs] = "${DEPLOYDIR} ${DEPLOY_DIR_IMAGE}"
+DEPLOYDIR = "${IMGDEPLOYDIR}"
+IMAGE_LINK_NAME ?= "baremetal-helloworld-image-${MACHINE}"
+IMAGE_NAME_SUFFIX ?= ""
+
+do_deploy(){
+    install ${D}/${datadir}/hello_baremetal_${MACHINE}.bin ${DEPLOYDIR}/${IMAGE_LINK_NAME}.bin
+    install ${D}/${datadir}/hello_baremetal_${MACHINE}.elf ${DEPLOYDIR}/${IMAGE_LINK_NAME}.elf
+}
+
+do_image(){
+    :
+}
+
+FILES_${PN} += " \
+    ${datadir}/hello_baremetal_${MACHINE}.bin \
+    ${datadir}/hello_baremetal_${MACHINE}.elf \
+"
+
+python do_rootfs(){
+    from oe.utils import execute_pre_post_process
+    from pathlib import Path
+
+    # Write empty manifest testdate file
+    deploy_dir = d.getVar('DEPLOYDIR')
+    link_name = d.getVar('IMAGE_LINK_NAME')
+    manifest_name = d.getVar('IMAGE_MANIFEST')
+
+    Path(manifest_name).touch()
+    if os.path.exists(manifest_name) and link_name:
+        manifest_link = deploy_dir + "/" + link_name + ".manifest"
+        if os.path.lexists(manifest_link):
+            os.remove(manifest_link)
+        os.symlink(os.path.basename(manifest_name), manifest_link)
+    execute_pre_post_process(d, d.getVar('ROOTFS_POSTPROCESS_COMMAND'))
+}
+
+# QEMU generic FreeRTOS parameters
+QB_DEFAULT_KERNEL = "${IMAGE_LINK_NAME}.bin"
+QB_MEM = "-m 256"
+QB_OPT_APPEND = "-nographic"
+QB_DEFAULT_FSTYPE = "bin"
+QB_DTB = ""
+
+# This next part is necessary to trick the build system into thinking
+# its building an image recipe so it generates the qemuboot.conf
+addtask do_deploy after do_write_qemuboot_conf before do_build
+addtask do_rootfs before do_deploy after do_install
+addtask do_image after do_rootfs before do_build
+inherit qemuboot
+
+# Based on image.bbclass to make sure we build qemu
+python(){
+    # do_addto_recipe_sysroot doesnt exist for all recipes, but we need it to have
+    # /usr/bin on recipe-sysroot (qemu) populated
+    def extraimage_getdepends(task):
+        deps = ""
+        for dep in (d.getVar('EXTRA_IMAGEDEPENDS') or "").split():
+        # Make sure we only add it for qemu
+            if 'qemu' in dep:
+                deps += " %s:%s" % (dep, task)
+        return deps
+    d.appendVarFlag('do_image', 'depends', extraimage_getdepends('do_addto_recipe_sysroot'))
+    d.appendVarFlag('do_image', 'depends', extraimage_getdepends('do_populate_sysroot'))
+}