arm: add cramfs class and recipes

Add cramfs-xip to image types and cramfs tools.

Change-Id: I801788c8c73fe354aa526032ae20927a48672cac
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>

arm/classes/cramfs-xip.bbclass

@@ -0,0 +1,15 @@
+# SPDX-License-Identifier: MIT
+#
+# Copyright (c) 2019 Arm Limited
+#
+SUMMARY = "Cramfs XIP image type"
+DESCRIPTION = "Cramfs XIP type image to add to IMAGE_TYPES"
+LICENSE = "MIT"
+
+inherit image_types
+
+do_image_cramfs_xip[depends] += "cramfs-tools-native:do_populate_sysroot"
+
+IMAGE_TYPES += " cramfs-xip"
+
+IMAGE_CMD_cramfs-xip = "mkcramfs -n ${IMAGE_NAME} -X ${IMAGE_ROOTFS} ${IMGDEPLOYDIR}/${IMAGE_NAME}${IMAGE_NAME_SUFFIX}.cramfs-xip ${EXTRA_IMAGECMD}"

arm/recipes-core/cramfs-tools/cramfs-tools.bb

@@ -0,0 +1,23 @@
+SUMMARY = "Cramfs tools"
+DESCRIPTION = "Cramfs tools to create cramfs images with support to XIP"
+HOMEPAGE = "https://github.com/npitre/cramfs-tools"
+LICENSE = "GPLv2"
+LIC_FILES_CHKSUM = "file://COPYING;md5=393a5ca445f6965873eca0259a17f833"
+
+SRC_URI = "git://github.com/npitre/cramfs-tools;protocol=https;nobranch=1"
+
+SRCREV = "23d032e6e0a973810c6aedf165441592641b60f4"
+
+BBCLASSEXTEND = "native"
+
+S = "${WORKDIR}/git"
+
+do_compile () {
+      oe_runmake
+}
+
+do_install() {
+    install -d ${D}${bindir}
+    install ${S}/mkcramfs ${D}${bindir}
+    install ${S}/cramfsck ${D}${bindir}
+}