[meta-xilinx] [PATCH v2 4/5] classes/zynqmp-pmu.bbclass: Create a extender class for the ZynqMP PMU

[Nathan Rossi]

This class is an extender class similar to native/nativesdk/multilib
that should be used with BBCLASSEXTEND.

The purpose of this class is to allow the building of recipes for the
ZynqMP PMU architecture along side building for the primary APU of the
ZynqMP. Which allows for building the PMU firmware itself as well as its
dependencies (e.g. newlib, libgloss).

This class is intended for use with binutils-cross, gcc-cross, newlib,
libgloss and pmu-firmware, but can be used globally. However there are
limitations of this class and functional behaviour beyond the intended
targets is not tested.

Signed-off-by: Nathan Rossi <nathan at nathanrossi.com>
---
 classes/zynqmp-pmu.bbclass | 118 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 118 insertions(+)
 create mode 100644 classes/zynqmp-pmu.bbclass

diff --git a/classes/zynqmp-pmu.bbclass b/classes/zynqmp-pmu.bbclass
new file mode 100644
index 0000000000..72913445a3
--- /dev/null
+++ b/classes/zynqmp-pmu.bbclass
@@ -0,0 +1,118 @@
+#
+# This class handles configuring a recipe to build for the ZynqMP PMU
+# architecture. The reason for this class is due to limitations of multilib
+# with regards to multiple architectures (which do not work correctly).
+#
+# This class is specifically intended to extend the binutils-cross, gcc-cross,
+# newlib, libgloss and pmu-firmware recipes so that binaries can be emitted
+# which target the PMU architecture alongside building for the APU architecture
+# (ARM64). But the class can be applied globally via BBCLASSEXTEND in for
+# example a <machine>.conf.
+#
+# This class is almost the same as a multilib variant with custom TUNE_* setup
+# to allow for a switched TUNE_ARCH.
+#
+
+ORIG_TARGET_ARCH := "${TARGET_ARCH}"
+
+# zynqmp-pmu target arch (hardcoded based on pre-gen data from arch-microblaze.inc)
+ABIEXTENSION = ""
+TUNE_ARCH = "microblazeel"
+#TUNE_FEATURES_tune-microblaze += "v9.2 little-endian barrel-shift pattern-compare"
+TUNE_CCARGS = "-mlittle-endian -mxl-barrel-shift -mxl-pattern-compare -mno-xl-reorder -mcpu=v9.2 -mxl-soft-mul -mxl-soft-div"
+TUNE_LDARGS = ""
+TUNE_ASARGS = ""
+TUNE_PKGARCH = "microblazeel-v9.2-bs-cmp"
+TARGET_OS = "elf"
+TARGET_FPU = "fpu-soft"
+
+# rebuild the MACHINE overrides
+MACHINEOVERRIDES = "${MACHINE}${@':${SOC_FAMILY}' if d.getVar('SOC_FAMILY') else ''}:microblaze"
+
+# override tune provided archs
+PACKAGE_EXTRA_ARCHS = "${TUNE_PKGARCH}"
+
+# baremetal equivalent config (note the tclibc is not included, this is purely
+# for recipes/etc that check for the value)
+TCLIBC = "baremetal"
+LIBCEXTENSION = ""
+LIBCOVERRIDE = ":libc-baremetal"
+USE_NLS = "no"
+IMAGE_LINGUAS = ""
+LIBC_DEPENDENCIES = ""
+
+# gcc-cross specific baremetal setup (due to the override order this is important)
+EXTRA_OECONF_pn-${MLPREFIX}gcc-cross-${TARGET_ARCH}_append = " --without-headers"
+
+EXTRA_OECONF_GCC_FLOAT = ""
+
+# Setup a multiarch like prefix.
+prefix = "/usr/${TARGET_SYS}"
+# Make sure GCC can search in the prefix dir (for libgcc)
+TOOLCHAIN_OPTIONS += "-B${RECIPE_SYSROOT}${includedir}/ -B${RECIPE_SYSROOT}${libdir}/"
+TOOLCHAIN_OPTIONS += "-I =${includedir} -L =${libdir}"
+
+python multitarget_zynqmp_pmu_virtclass_handler () {
+    variant = "zynqmp-pmu"
+    pn = d.getVar("PN")
+    if not (pn.startswith(variant + "-") or pn.endswith("-" + variant)):
+        return
+
+    if bb.data.inherits_class('native', e.data) or bb.data.inherits_class('nativesdk', e.data) or bb.data.inherits_class('crosssdk', e.data):
+        raise bb.parse.SkipPackage("Can't extend native/nativesdk/crosssdk recipes")
+
+    initialpn = e.data.getVar("PN").replace("-" + variant, "").replace(variant + "-", "")
+    e.data.setVar("MLPREFIX", variant + "-")
+    e.data.setVar("OVERRIDES", e.data.getVar("OVERRIDES", False) + ":virtclass-" + variant)
+
+    # work around for -cross recipes that embed the TARGET_ARCH value
+    if bb.data.inherits_class('cross', e.data):
+        if initialpn.endswith("-" + d.getVar("ORIG_TARGET_ARCH")):
+            initialpn = initialpn.replace("-" + d.getVar("ORIG_TARGET_ARCH"), "-" + d.getVar("TARGET_ARCH"))
+
+    e.data.setVar("PN", variant + "-" + initialpn)
+}
+
+addhandler multitarget_zynqmp_pmu_virtclass_handler
+multitarget_zynqmp_pmu_virtclass_handler[eventmask] = "bb.event.RecipePreFinalise"
+
+python () {
+    variant = "zynqmp-pmu"
+    pn = d.getVar("PN")
+    if not pn.startswith(variant + "-"):
+        return
+
+    if pn.endswith("gcc-cross-" + d.getVar("TARGET_ARCH")):
+        # work around, DEPENDS _remove being immediate in gcc-cross
+        d.setVar("DEPENDS_remove", "virtual/%slibc-for-gcc" % d.getVar("TARGET_PREFIX"))
+
+    if pn.endswith("libgcc"):
+        # work around, strip depends on libc via do_package* tasks (this class cannot set ASSUME_PROVIDED += libc)
+        for i in ["do_package", "do_package_write_ipk", "do_package_write_deb", "do_package_write_rpm"]:
+            sanitized = " ".join([dep for dep in d.getVarFlag(i, "depends").split() if not dep.startswith("virtual/%s-libc" % variant)])
+            d.setVarFlag(i, "depends", sanitized)
+
+    import oe.classextend
+
+    clsextend = oe.classextend.ClassExtender(variant, d)
+
+    clsextend.map_depends_variable("DEPENDS")
+    clsextend.map_variable("PROVIDES")
+
+    clsextend.rename_packages()
+    clsextend.rename_package_variables((d.getVar("PACKAGEVARS") or "").split())
+
+    clsextend.map_packagevars()
+    clsextend.map_regexp_variable("PACKAGES_DYNAMIC")
+    clsextend.map_variable("PACKAGE_INSTALL")
+}
+
+# microblaze elf insane definitions not currently in insane.bbclass
+PACKAGEQA_EXTRA_MACHDEFFUNCS += "package_qa_get_machine_dict_microblazeelf"
+def package_qa_get_machine_dict_microblazeelf(machdata, d):
+    machdata["elf"] =  {
+                        "microblaze":  (189,   0,    0,          False,         32),
+                        "microblazeeb":(189,   0,    0,          False,         32),
+                        "microblazeel":(189,   0,    0,          True,          32),
+                      }
+    return machdata
-- 
2.11.0