On Mon, 27 Jan 2020 at 10:00, Alejandro Enedino Hernandez Samaniego <[email protected]> wrote: > > Create HelloWorld examples that run on several of the QEMU architectures > supported by the build system. > > This recipe can be used by anyone to understand how baremetal applications > can be built using OpenEmbedded and how the wiring to set them up could be. > > This should also facilitate creating/extending the OE testing infrastructure > to allow baremetal applications or RTOSs to be tested in the same way that > Linux currently is. > > This can easily be extended to work on other MACHINES in the future. > > To run this example: > > # Source the oe environment as usual > $ source oe-init-buildenv > > # Set TCLIBC to either newlib or baremetal > $ echo "TCLIBC = \"newlib\"" >> ./conf/local.conf > > # Use one of the supported architectures (qemuarm64, qemuarm or qemuarmv5) > $ echo "MACHINE = \"qemuarm64\"" >> ./conf/local.conf > > # Build > $ bitbake baremetal-helloworld > > # Launch QEMU > $ runqemu > > runqemu - INFO - Running bitbake -e ... > runqemu - INFO - Continuing with the following parameters: > KERNEL: [tmp/deploy/images/qemuarm64/baremetal-helloworld-qemuarm64.bin] > MACHINE: [qemuarm64] > FSTYPE: [bin] > ROOTFS: [tmp/deploy/images/qemuarm64/baremetal-helloworld-qemuarm64.bin] > CONFFILE: > [tmp/deploy/images/qemuarm64/baremetal-helloworld-qemuarm64.qemuboot.conf] > > Hello OpenEmbedded! > > Signed-off-by: Alejandro Enedino Hernandez Samaniego <[email protected]> > --- > .../baremetal-examples/baremetal-helloworld_git.bb | 114 > +++++++++++++++++++++ > 1 file changed, 114 insertions(+) > create mode 100644 > meta/recipes-extended/baremetal-examples/baremetal-helloworld_git.bb > > diff --git > a/meta/recipes-extended/baremetal-examples/baremetal-helloworld_git.bb > b/meta/recipes-extended/baremetal-examples/baremetal-helloworld_git.bb > new file mode 100644 > index 0000000..aab48b1 > --- /dev/null > +++ b/meta/recipes-extended/baremetal-examples/baremetal-helloworld_git.bb > @@ -0,0 +1,114 @@ > +SUMMARY = "Baremetal examples to work with the several QEMU architectures > supported on OpenEmbedded" > +HOMEPAGE = "https://github.com/aehs29/baremetal-helloqemu"; > +LICENSE = "CC-BY-SA-4.0"
I've raised https://github.com/aehs29/baremetal-helloqemu/issues/1 as CC licenses aren't recommended for software. > +LIC_FILES_CHKSUM = "file://LICENSE;md5=4084714af41157e38872e798eb3fe1b1" > + > +SRCREV = "fe81742f1159725408dd7305e40e7bd4dfd1e264" > + > +SRC_URI = "git://github.com/aehs29/baremetal-helloqemu.git;protocol=https " > + > +S = "${WORKDIR}/git" > +B = "${WORKDIR}/build" > + > +# 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}" > + > +do_configure(){ > + # Avoid building on the source directory > + cp ${S}/* ${B} > +} > + > +do_install(){ > + install -d ${D}/${datadir} > + install -m 755 ${B}/hello_baremetal_${BAREMETAL_QEMUARCH}.bin > ${D}/${datadir}/hello_baremetal_${MACHINE}.bin > + install -m 755 ${B}/hello_baremetal_${BAREMETAL_QEMUARCH}.elf > ${D}/${datadir}/hello_baremetal_${MACHINE}.elf > +} > + > +# Make sure there are no race conditions when > +# assembling compiling and linking steps > +PARALLEL_MAKE = "" > + > +# Borrowed from meta-freertos Can these borrowed sections go into a bbclass to make the example simpler? meta-freertos might then be able to use the bbclass from openembedded-core. > +inherit rootfs-postcommands > +inherit deploy > +do_deploy[dirs] = "${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')) > +} > -- > 2.7.4 Thanks, Paul -- _______________________________________________ Openembedded-core mailing list [email protected] http://lists.openembedded.org/mailman/listinfo/openembedded-core
