diff --git a/meta/conf/machine/include/tune-sh3.inc b/meta/conf/machine/include/tune-sh3.inc
new file mode 100644
index 0000000..c5ed7ba
--- /dev/null
+++ b/meta/conf/machine/include/tune-sh3.inc
@@ -0,0 +1,17 @@
+DEFAULTTUNE ?= "sh3"
+
+require conf/machine/include/sh/arch-sh.inc
+
+TUNEVALID[sh3] = "Enable SH3 optimizations"
+TUNE_CCARGS .= "${@bb.utils.contains("TUNE_FEATURES", "sh3", " -m3", "", d)}"
+
+AVAILTUNES += "sh3 sh3eb"
+TUNE_FEATURES_tune-sh3 = "sh3"
+TUNE_ARCH_tune-sh3 = "sh3"
+TUNE_PKGARCH_tune-sh3 = "sh3"
+PACKAGE_EXTRA_ARCHS_tune-sh3 = "sh sh3"
+
+TUNE_FEATURES_tune-sh3eb = "sh3 bigendian"
+TUNE_ARCH_tune-sh3eb = "sh3eb"
+TUNE_PKGARCH_tune-sh3eb = "sh3eb"
+PACKAGE_EXTRA_ARCHS_tune-sh3eb = "sheb sh3eb"