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-rw-r--r--arch/mips/loongson64/Platform21
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/mips/loongson64/Platform b/arch/mips/loongson64/Platform
index 2e48e83d5524..85d808924c94 100644
--- a/arch/mips/loongson64/Platform
+++ b/arch/mips/loongson64/Platform
@@ -22,6 +22,27 @@ ifdef CONFIG_CPU_LOONGSON2F_WORKAROUNDS
endif
endif
+cflags-$(CONFIG_CPU_LOONGSON3) += -Wa,--trap
+#
+# binutils from v2.25 on and gcc starting from v4.9.0 treat -march=loongson3a
+# as MIPS64 R2; older versions as just R1. This leaves the possibility open
+# that GCC might generate R2 code for -march=loongson3a which then is rejected
+# by GAS. The cc-option can't probe for this behaviour so -march=loongson3a
+# can't easily be used safely within the kbuild framework.
+#
+ifeq ($(call cc-ifversion, -ge, 0409, y), y)
+ ifeq ($(call ld-ifversion, -ge, 22500000, y), y)
+ cflags-$(CONFIG_CPU_LOONGSON3) += \
+ $(call cc-option,-march=loongson3a -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64)
+ else
+ cflags-$(CONFIG_CPU_LOONGSON3) += \
+ $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64)
+ endif
+else
+ cflags-$(CONFIG_CPU_LOONGSON3) += \
+ $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64)
+endif
+
#
# Loongson Machines' Support
#