1*4882a593Smuzhiyun# 2*4882a593Smuzhiyun# Loongson Processors' Support 3*4882a593Smuzhiyun# 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun 6*4882a593Smuzhiyuncflags-$(CONFIG_CPU_LOONGSON64) += -Wa,--trap 7*4882a593Smuzhiyun 8*4882a593Smuzhiyun# 9*4882a593Smuzhiyun# binutils from v2.25 on and gcc starting from v4.9.0 treat -march=loongson3a 10*4882a593Smuzhiyun# as MIPS64 R2; older versions as just R1. This leaves the possibility open 11*4882a593Smuzhiyun# that GCC might generate R2 code for -march=loongson3a which then is rejected 12*4882a593Smuzhiyun# by GAS. The cc-option can't probe for this behaviour so -march=loongson3a 13*4882a593Smuzhiyun# can't easily be used safely within the kbuild framework. 14*4882a593Smuzhiyun# 15*4882a593Smuzhiyunifeq ($(call cc-ifversion, -ge, 0409, y), y) 16*4882a593Smuzhiyun ifeq ($(call ld-ifversion, -ge, 225000000, y), y) 17*4882a593Smuzhiyun cflags-$(CONFIG_CPU_LOONGSON64) += \ 18*4882a593Smuzhiyun $(call cc-option,-march=loongson3a -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) 19*4882a593Smuzhiyun else 20*4882a593Smuzhiyun cflags-$(CONFIG_CPU_LOONGSON64) += \ 21*4882a593Smuzhiyun $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) 22*4882a593Smuzhiyun endif 23*4882a593Smuzhiyunelse 24*4882a593Smuzhiyun cflags-$(CONFIG_CPU_LOONGSON64) += \ 25*4882a593Smuzhiyun $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) 26*4882a593Smuzhiyunendif 27*4882a593Smuzhiyun 28*4882a593Smuzhiyun# Some -march= flags enable MMI instructions, and GCC complains about that 29*4882a593Smuzhiyun# support being enabled alongside -msoft-float. Thus explicitly disable MMI. 30*4882a593Smuzhiyuncflags-y += $(call cc-option,-mno-loongson-mmi) 31*4882a593Smuzhiyun 32*4882a593Smuzhiyun# 33*4882a593Smuzhiyun# Loongson Machines' Support 34*4882a593Smuzhiyun# 35*4882a593Smuzhiyun 36*4882a593Smuzhiyuncflags-$(CONFIG_MACH_LOONGSON64) += -I$(srctree)/arch/mips/include/asm/mach-loongson64 -mno-branch-likely 37*4882a593Smuzhiyunload-$(CONFIG_CPU_LOONGSON64) += 0xffffffff80200000 38