1# 2# Loongson Processors' Support 3# 4 5 6cflags-$(CONFIG_CPU_LOONGSON64) += -Wa,--trap 7 8# 9# binutils from v2.25 on and gcc starting from v4.9.0 treat -march=loongson3a 10# as MIPS64 R2; older versions as just R1. This leaves the possibility open 11# that GCC might generate R2 code for -march=loongson3a which then is rejected 12# by GAS. The cc-option can't probe for this behaviour so -march=loongson3a 13# can't easily be used safely within the kbuild framework. 14# 15ifeq ($(call cc-ifversion, -ge, 0409, y), y) 16 ifeq ($(call ld-ifversion, -ge, 22500, y), y) 17 cflags-$(CONFIG_CPU_LOONGSON64) += \ 18 $(call cc-option,-march=loongson3a -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) 19 else 20 cflags-$(CONFIG_CPU_LOONGSON64) += \ 21 $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) 22 endif 23else 24 cflags-$(CONFIG_CPU_LOONGSON64) += \ 25 $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) 26endif 27 28# Some -march= flags enable MMI instructions, and GCC complains about that 29# support being enabled alongside -msoft-float. Thus explicitly disable MMI. 30cflags-y += $(call cc-option,-mno-loongson-mmi) 31 32# 33# Loongson Machines' Support 34# 35 36cflags-$(CONFIG_MACH_LOONGSON64) += -I$(srctree)/arch/mips/include/asm/mach-loongson64 -mno-branch-likely 37load-$(CONFIG_CPU_LOONGSON64) += 0xffffffff80200000 38