arm: Add hafnium support

Initial recipe for hafnium[1]. This enables build for reference Secure
Partition Manager (SPM) for systems that implement the Armv8.4-A
Secure-EL2 extension.

Link: [1] https://www.trustedfirmware.org/projects/hafnium/

Signed-off-by: Arunachalam Ganapathy <arunachalam.ganapathy@arm.com>
Change-Id: Ib256d8ca03c94131e308d962d786d5d6a656c256
Signed-off-by: Jon Mason <jon.mason@arm.com>

meta-arm/recipes-bsp/hafnium/hafnium_2.4.bb

@@ -0,0 +1,74 @@
+SUMMARY = "Hafnium"
+DESCRIPTION = "A reference Secure Partition Manager (SPM) for systems that implement the Armv8.4-A Secure-EL2 extension"
+LICENSE = "BSD-3-Clause & GPLv2"
+LIC_FILES_CHKSUM = "file://LICENSE;md5=782b40c14bad5294672c500501edc103"
+
+PACKAGE_ARCH = "${MACHINE_ARCH}"
+
+inherit deploy python3native
+
+SRC_URI = "gitsm://git.trustedfirmware.org/hafnium/hafnium.git;protocol=https"
+SRCREV = "410a3acaf669c12d41fb4c57fcaf3ecee6fdba61"
+S = "${WORKDIR}/git"
+
+COMPATIBLE_MACHINE ?= "invalid"
+
+# Default build 'reference'
+HAFNIUM_PROJECT ?= "reference"
+
+# Platform must be set for each machine
+HAFNIUM_PLATFORM ?= "invalid"
+
+# hafnium build directory
+# Append _clang as the build rule in hafnium adds this to the platform name.
+HAFNIUM_BUILD_DIR_PLAT = "out/${HAFNIUM_PROJECT}/${HAFNIUM_PLATFORM}_clang"
+
+# do_deploy will install everything listed in this variable. It is set by
+# default to hafnium
+HAFNIUM_INSTALL_TARGET ?= "hafnium"
+
+DEPENDS = "bison-native bc-native"
+
+# set project to build
+EXTRA_OEMAKE += "PROJECT=${HAFNIUM_PROJECT}"
+
+do_compile_prepend() {
+    # Hafnium expects 'python'. Create symlink python to python3
+    real=$(which ${PYTHON})
+    ln -snf $real $(dirname $real)/python
+}
+
+do_install() {
+    install -d -m 755 ${D}/firmware
+    for bldfile in ${HAFNIUM_INSTALL_TARGET}; do
+        processed="0"
+        if [ -f ${S}/${HAFNIUM_BUILD_DIR_PLAT}/$bldfile.bin ]; then
+            echo "Install $bldfile.bin"
+            install -m 0755 ${S}/${HAFNIUM_BUILD_DIR_PLAT}/$bldfile.bin \
+                ${D}/firmware/$bldfile-${HAFNIUM_PLATFORM}.bin
+            ln -sf $bldfile-${HAFNIUM_PLATFORM}.bin ${D}/firmware/$bldfile.bin
+            processed="1"
+        fi
+        if [ -f ${S}/${HAFNIUM_BUILD_DIR_PLAT}/$bldfile.elf ]; then
+            echo "Install $bldfile.elf"
+            install -m 0755 ${S}/${HAFNIUM_BUILD_DIR_PLAT}/$bldfile.elf \
+                ${D}/firmware/$bldfile-${HAFNIUM_PLATFORM}.elf
+            ln -sf $bldfile-${HAFNIUM_PLATFORM}.elf ${D}/firmware/$bldfile.elf
+            processed="1"
+        fi
+        if [ "$processed" = "0" ]; then
+            bberror "Unsupported HAFNIUM_INSTALL_TARGET target $bldfile"
+            exit 1
+        fi
+    done
+}
+
+FILES_${PN} = "/firmware"
+SYSROOT_DIRS += "/firmware"
+# skip QA tests: {'ldflags'}
+INSANE_SKIP_${PN} = "ldflags"
+
+do_deploy() {
+    cp -rf ${D}/firmware/* ${DEPLOYDIR}/
+}
+addtask deploy after do_install