134 lines
4.7 KiB
Plaintext
134 lines
4.7 KiB
Plaintext
# Baremetal image class
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#
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# This class is meant to be inherited by recipes for baremetal/RTOS applications
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# It contains code that would be used by all of them, every recipe just needs to
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# override certain variables.
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#
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# For scalability purposes, code within this class focuses on the "image" wiring
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# to satisfy the OpenEmbedded image creation and testing infrastructure.
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#
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# See meta-skeleton for a working example.
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# Toolchain should be baremetal or newlib based.
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# TCLIBC="baremetal" or TCLIBC="newlib"
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COMPATIBLE_HOST:libc-musl:class-target = "null"
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COMPATIBLE_HOST:libc-glibc:class-target = "null"
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inherit rootfs-postcommands
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# Set some defaults, but these should be overriden by each recipe if required
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IMGDEPLOYDIR ?= "${WORKDIR}/deploy-${PN}-image-complete"
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BAREMETAL_BINNAME ?= "hello_baremetal_${MACHINE}"
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IMAGE_LINK_NAME ?= "baremetal-helloworld-image-${MACHINE}"
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IMAGE_NAME_SUFFIX ?= ""
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do_rootfs[dirs] = "${IMGDEPLOYDIR} ${DEPLOY_DIR_IMAGE}"
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do_image(){
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install ${D}/${base_libdir}/firmware/${BAREMETAL_BINNAME}.bin ${IMGDEPLOYDIR}/${IMAGE_LINK_NAME}.bin
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install ${D}/${base_libdir}/firmware/${BAREMETAL_BINNAME}.elf ${IMGDEPLOYDIR}/${IMAGE_LINK_NAME}.elf
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}
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do_image_complete(){
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:
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}
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python do_rootfs(){
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from oe.utils import execute_pre_post_process
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from pathlib import Path
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# Write empty manifest file to satisfy test infrastructure
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deploy_dir = d.getVar('IMGDEPLOYDIR')
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link_name = d.getVar('IMAGE_LINK_NAME')
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manifest_name = d.getVar('IMAGE_MANIFEST')
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Path(manifest_name).touch()
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if os.path.exists(manifest_name) and link_name:
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manifest_link = deploy_dir + "/" + link_name + ".manifest"
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if manifest_link != manifest_name:
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if os.path.lexists(manifest_link):
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os.remove(manifest_link)
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os.symlink(os.path.basename(manifest_name), manifest_link)
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# A lot of postprocess commands assume the existence of rootfs/etc
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sysconfdir = d.getVar("IMAGE_ROOTFS") + d.getVar('sysconfdir')
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bb.utils.mkdirhier(sysconfdir)
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execute_pre_post_process(d, d.getVar('ROOTFS_POSTPROCESS_COMMAND'))
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}
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# Assure binaries, manifest and qemubootconf are populated on DEPLOY_DIR_IMAGE
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do_image_complete[dirs] = "${TOPDIR}"
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SSTATETASKS += "do_image_complete"
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SSTATE_SKIP_CREATION:task-image-complete = '1'
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do_image_complete[sstate-inputdirs] = "${IMGDEPLOYDIR}"
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do_image_complete[sstate-outputdirs] = "${DEPLOY_DIR_IMAGE}"
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do_image_complete[stamp-extra-info] = "${MACHINE_ARCH}"
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addtask do_image_complete after do_image before do_build
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python do_image_complete_setscene () {
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sstate_setscene(d)
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}
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addtask do_image_complete_setscene
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# QEMU generic Baremetal/RTOS parameters
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QB_DEFAULT_KERNEL ?= "${IMAGE_LINK_NAME}.bin"
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QB_MEM ?= "-m 256"
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QB_DEFAULT_FSTYPE ?= "bin"
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QB_DTB ?= ""
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QB_OPT_APPEND:append = " -nographic"
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# RISC-V tunes set the BIOS, unset, and instruct QEMU to
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# ignore the BIOS and boot from -kernel
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QB_DEFAULT_BIOS:qemuriscv64 = ""
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QB_DEFAULT_BIOS:qemuriscv32 = ""
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QB_OPT_APPEND:append:qemuriscv64 = " -bios none"
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QB_OPT_APPEND:append:qemuriscv32 = " -bios none"
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# Use the medium-any code model for the RISC-V 64 bit implementation,
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# since medlow can only access addresses below 0x80000000 and RAM
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# starts at 0x80000000 on RISC-V 64
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# Keep RISC-V 32 using -mcmodel=medlow (symbols lie between -2GB:2GB)
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CFLAGS:append:qemuriscv64 = " -mcmodel=medany"
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## Emulate image.bbclass
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# Handle inherits of any of the image classes we need
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IMAGE_CLASSES ??= ""
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IMGCLASSES = " ${IMAGE_CLASSES}"
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inherit ${IMGCLASSES}
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# Set defaults to satisfy IMAGE_FEATURES check
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IMAGE_FEATURES ?= ""
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IMAGE_FEATURES[type] = "list"
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IMAGE_FEATURES[validitems] += ""
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# This next part is necessary to trick the build system into thinking
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# its building an image recipe so it generates the qemuboot.conf
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addtask do_rootfs before do_image after do_install
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addtask do_image after do_rootfs before do_image_complete
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addtask do_image_complete after do_image before do_build
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inherit qemuboot
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# Based on image.bbclass to make sure we build qemu
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python(){
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# do_addto_recipe_sysroot doesnt exist for all recipes, but we need it to have
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# /usr/bin on recipe-sysroot (qemu) populated
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# The do_addto_recipe_sysroot dependency is coming from EXTRA_IMAGDEPENDS now,
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# we just need to add the logic to add its dependency to do_image.
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def extraimage_getdepends(task):
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deps = ""
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for dep in (d.getVar('EXTRA_IMAGEDEPENDS') or "").split():
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# Make sure we only add it for qemu
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if 'qemu' in dep:
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if ":" in dep:
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deps += " %s " % (dep)
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else:
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deps += " %s:%s" % (dep, task)
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return deps
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d.appendVarFlag('do_image', 'depends', extraimage_getdepends('do_populate_sysroot'))
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}
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