130ad29bbSHuacai Chen# 230ad29bbSHuacai Chen# Loongson Processors' Support 330ad29bbSHuacai Chen# 430ad29bbSHuacai Chen 530ad29bbSHuacai Chen# Only gcc >= 4.4 have Loongson specific support 630ad29bbSHuacai Chencflags-$(CONFIG_CPU_LOONGSON2) += -Wa,--trap 730ad29bbSHuacai Chencflags-$(CONFIG_CPU_LOONGSON2E) += \ 830ad29bbSHuacai Chen $(call cc-option,-march=loongson2e,-march=r4600) 930ad29bbSHuacai Chencflags-$(CONFIG_CPU_LOONGSON2F) += \ 1030ad29bbSHuacai Chen $(call cc-option,-march=loongson2f,-march=r4600) 1130ad29bbSHuacai Chen# Enable the workarounds for Loongson2f 1230ad29bbSHuacai Chenifdef CONFIG_CPU_LOONGSON2F_WORKAROUNDS 1330ad29bbSHuacai Chen ifeq ($(call as-option,-Wa$(comma)-mfix-loongson2f-nop,),) 1430ad29bbSHuacai Chen $(error only binutils >= 2.20.2 have needed option -mfix-loongson2f-nop) 1530ad29bbSHuacai Chen else 1630ad29bbSHuacai Chen cflags-$(CONFIG_CPU_NOP_WORKAROUNDS) += -Wa$(comma)-mfix-loongson2f-nop 1730ad29bbSHuacai Chen endif 1830ad29bbSHuacai Chen ifeq ($(call as-option,-Wa$(comma)-mfix-loongson2f-jump,),) 1930ad29bbSHuacai Chen $(error only binutils >= 2.20.2 have needed option -mfix-loongson2f-jump) 2030ad29bbSHuacai Chen else 2130ad29bbSHuacai Chen cflags-$(CONFIG_CPU_JUMP_WORKAROUNDS) += -Wa$(comma)-mfix-loongson2f-jump 2230ad29bbSHuacai Chen endif 2330ad29bbSHuacai Chenendif 2430ad29bbSHuacai Chen 25*5188129bSHuacai Chencflags-$(CONFIG_CPU_LOONGSON3) += -Wa,--trap 26*5188129bSHuacai Chen# 27*5188129bSHuacai Chen# binutils from v2.25 on and gcc starting from v4.9.0 treat -march=loongson3a 28*5188129bSHuacai Chen# as MIPS64 R2; older versions as just R1. This leaves the possibility open 29*5188129bSHuacai Chen# that GCC might generate R2 code for -march=loongson3a which then is rejected 30*5188129bSHuacai Chen# by GAS. The cc-option can't probe for this behaviour so -march=loongson3a 31*5188129bSHuacai Chen# can't easily be used safely within the kbuild framework. 32*5188129bSHuacai Chen# 33*5188129bSHuacai Chenifeq ($(call cc-ifversion, -ge, 0409, y), y) 34*5188129bSHuacai Chen ifeq ($(call ld-ifversion, -ge, 22500000, y), y) 35*5188129bSHuacai Chen cflags-$(CONFIG_CPU_LOONGSON3) += \ 36*5188129bSHuacai Chen $(call cc-option,-march=loongson3a -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) 37*5188129bSHuacai Chen else 38*5188129bSHuacai Chen cflags-$(CONFIG_CPU_LOONGSON3) += \ 39*5188129bSHuacai Chen $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) 40*5188129bSHuacai Chen endif 41*5188129bSHuacai Chenelse 42*5188129bSHuacai Chen cflags-$(CONFIG_CPU_LOONGSON3) += \ 43*5188129bSHuacai Chen $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) 44*5188129bSHuacai Chenendif 45*5188129bSHuacai Chen 4630ad29bbSHuacai Chen# 4730ad29bbSHuacai Chen# Loongson Machines' Support 4830ad29bbSHuacai Chen# 4930ad29bbSHuacai Chen 5030ad29bbSHuacai Chenplatform-$(CONFIG_MACH_LOONGSON64) += loongson64/ 5130ad29bbSHuacai Chencflags-$(CONFIG_MACH_LOONGSON64) += -I$(srctree)/arch/mips/include/asm/mach-loongson64 -mno-branch-likely 5230ad29bbSHuacai Chenload-$(CONFIG_LEMOTE_FULOONG2E) += 0xffffffff80100000 5330ad29bbSHuacai Chenload-$(CONFIG_LEMOTE_MACH2F) += 0xffffffff80200000 5430ad29bbSHuacai Chenload-$(CONFIG_LOONGSON_MACH3X) += 0xffffffff80200000 55