diff --git a/meta/conf/machine/include/tune-arm9tdmi.inc b/meta/conf/machine/include/tune-arm9tdmi.inc
new file mode 100644
index 0000000..dee57c9
--- /dev/null
+++ b/meta/conf/machine/include/tune-arm9tdmi.inc
@@ -0,0 +1,11 @@
+DEFAULTTUNE ?= "armv4t"
+
+require conf/machine/include/arm/arch-armv4.inc
+
+TUNEVALID[arm9tdmi] = "Enable arm9tdmi specific processor optimizations"
+TUNE_CCARGS .= "${@bb.utils.contains("TUNE_FEATURES", "arm9tdmi", " -mtune=arm9tdmi", "", d)}"
+
+AVAILTUNES += "arm9tdmi"
+ARMPKGARCH_tune-arm9tdmi = "arm9tdmi"
+TUNE_FEATURES_tune-arm9tdmi = "${TUNE_FEATURES_tune-armv4t} arm9tdmi"
+PACKAGE_EXTRA_ARCHS_tune-arm9tdmi = "${PACKAGE_EXTRA_ARCHS_tune-armv4t} arm9tdmit"