cortex-m0plus.inc: Add tuning for cortex M0 plus

Add tuning files for ARM cortex m0 plus and the armv6-m architecture
that it is based on.

Signed-off-by: Jonathan Richardson <jonathan.richardson@broadcom.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

diff --git a/meta/conf/machine/include/arm/arch-armv6m.inc b/meta/conf/machine/include/arm/arch-armv6m.inc
new file mode 100755 (executable)
index 0000000..6876810
--- /dev/null
+++ b/meta/conf/machine/include/arm/arch-armv6m.inc
@@ -0,0 +1,19 @@
+# Tuning for ARMV6-m defined in ARM v6-M ArchitectureReference Manual
+# at https://static.docs.arm.com/ddi0419/d/DDI0419D_armv6m_arm.pdf
+DEFAULTTUNE ?= "armv6m"
+
+TUNEVALID[armv6m] = "Enable instructions for ARMv6-m"
+TUNECONFLICTS[armv6m] = "armv4 armv5 armv6 armv7a"
+
+# Use armv6s-m instead of armv6-m to avoid gcc bug "SVC is not permitted on this architecture".
+# SVC is a valid instruction.
+TUNE_CCARGS .= "${@bb.utils.contains('TUNE_FEATURES', 'armv6m', ' -march=armv6s-m', '', d)}"
+MACHINEOVERRIDES =. "${@bb.utils.contains('TUNE_FEATURES', 'armv6m', 'armv6m:', '' ,d)}"
+
+require conf/machine/include/arm/arch-armv5.inc
+
+# Little Endian
+AVAILTUNES += "armv6m"
+ARMPKGARCH_tune-armv6m             = "armv6m"
+TUNE_FEATURES_tune-armv6m          = "armv6m"
+PACKAGE_EXTRA_ARCHS_tune-armv6m    = "armv6m"

diff --git a/meta/conf/machine/include/tune-cortex-m0plus.inc b/meta/conf/machine/include/tune-cortex-m0plus.inc
new file mode 100755 (executable)
index 0000000..1c7512b
--- /dev/null
+++ b/meta/conf/machine/include/tune-cortex-m0plus.inc
@@ -0,0 +1,11 @@
+DEFAULTTUNE ?= "cortexm0-plus"
+require conf/machine/include/arm/arch-armv6m.inc
+
+TUNEVALID[cortexm0-plus] = "Enable Cortex-M0 Plus specific processor optimizations"
+TUNE_CCARGS .= "${@bb.utils.contains('TUNE_FEATURES', 'cortexm0-plus', ' -mcpu=cortex-m0plus', '', d)}"
+AVAILTUNES += "cortexm0-plus"
+
+ARMPKGARCH_tune-cortexm0-plus = "cortexm0-plus"
+TUNE_FEATURES_tune-cortexm0-plus = "${TUNE_FEATURES_tune-armv6m} cortexm0-plus"
+
+PACKAGE_EXTRA_ARCHS_tune-cortexm0-plus = "${PACKAGE_EXTRA_ARCHS_tune-armv6m} cortexm0-plus"