1 files changed, 59 insertions, 0 deletions
diff --git a/import-layers/yocto-poky/meta/classes/qemu.bbclass b/import-layers/yocto-poky/meta/classes/qemu.bbclass
new file mode 100644
index 000000000..75739dbbf
--- /dev/null
+++ b/import-layers/yocto-poky/meta/classes/qemu.bbclass
@@ -0,0 +1,59 @@
+#
+# This class contains functions for recipes that need QEMU or test for its
+# existence.
+#
+
+def qemu_target_binary(data):
+    target_arch = data.getVar("TARGET_ARCH", True)
+    if target_arch in ("i486", "i586", "i686"):
+        target_arch = "i386"
+    elif target_arch == "powerpc":
+        target_arch = "ppc"
+    elif target_arch == "powerpc64":
+        target_arch = "ppc64"
+
+    return "qemu-" + target_arch
+
+def qemu_wrapper_cmdline(data, rootfs_path, library_paths):
+    import string
+
+    qemu_binary = qemu_target_binary(data)
+    if qemu_binary == "qemu-allarch":
+        qemu_binary = "qemuwrapper"
+
+    qemu_options = data.getVar("QEMU_OPTIONS", True)    
+
+    return "PSEUDO_UNLOAD=1 " + qemu_binary + " " + qemu_options + " -L " + rootfs_path\
+            + " -E LD_LIBRARY_PATH=" + ":".join(library_paths) + " "
+
+# Next function will return a string containing the command that is needed to
+# to run a certain binary through qemu. For example, in order to make a certain
+# postinstall scriptlet run at do_rootfs time and running the postinstall is
+# architecture dependent, we can run it through qemu. For example, in the
+# postinstall scriptlet, we could use the following:
+#
+# ${@qemu_run_binary(d, '$D', '/usr/bin/test_app')} [test_app arguments]
+#
+def qemu_run_binary(data, rootfs_path, binary):
+    libdir = rootfs_path + data.getVar("libdir", False)
+    base_libdir = rootfs_path + data.getVar("base_libdir", False)
+
+    return qemu_wrapper_cmdline(data, rootfs_path, [libdir, base_libdir]) + rootfs_path + binary
+
+# QEMU_EXTRAOPTIONS is not meant to be directly used, the extensions are
+# PACKAGE_ARCH, *NOT* overrides.
+# In some cases (e.g. ppc) simply being arch specific (apparently) isn't good
+# enough and a PACKAGE_ARCH specific -cpu option is needed (hence we have to do
+# this dance). For others (e.g. arm) a -cpu option is not necessary, since the
+# qemu-arm default CPU supports all required architecture levels.
+
+QEMU_OPTIONS = "-r ${OLDEST_KERNEL} ${@d.getVar("QEMU_EXTRAOPTIONS_%s" % d.getVar('PACKAGE_ARCH', True), True) or ""}"
+QEMU_OPTIONS[vardeps] += "QEMU_EXTRAOPTIONS_${PACKAGE_ARCH}"
+
+QEMU_EXTRAOPTIONS_ppce500v2 = " -cpu e500v2"
+QEMU_EXTRAOPTIONS_ppce500mc = " -cpu e500mc"
+QEMU_EXTRAOPTIONS_ppce5500 = " -cpu e500mc"
+QEMU_EXTRAOPTIONS_ppc64e5500 = " -cpu e500mc"
+QEMU_EXTRAOPTIONS_ppce6500 = " -cpu e500mc"
+QEMU_EXTRAOPTIONS_ppc64e6500 = " -cpu e500mc"
+QEMU_EXTRAOPTIONS_ppc7400 = " -cpu 7400"