1# 2# Loongson Processors' Support 3# 4 5# Only gcc >= 4.4 have Loongson specific support 6cflags-$(CONFIG_CPU_LOONGSON2) += -Wa,--trap 7cflags-$(CONFIG_CPU_LOONGSON2E) += \ 8 $(call cc-option,-march=loongson2e,-march=r4600) 9cflags-$(CONFIG_CPU_LOONGSON2F) += \ 10 $(call cc-option,-march=loongson2f,-march=r4600) 11# Enable the workarounds for Loongson2f 12ifdef CONFIG_CPU_LOONGSON2F_WORKAROUNDS 13 ifeq ($(call as-option,-Wa$(comma)-mfix-loongson2f-nop,),) 14 $(error only binutils >= 2.20.2 have needed option -mfix-loongson2f-nop) 15 else 16 cflags-$(CONFIG_CPU_NOP_WORKAROUNDS) += -Wa$(comma)-mfix-loongson2f-nop 17 endif 18 ifeq ($(call as-option,-Wa$(comma)-mfix-loongson2f-jump,),) 19 $(error only binutils >= 2.20.2 have needed option -mfix-loongson2f-jump) 20 else 21 cflags-$(CONFIG_CPU_JUMP_WORKAROUNDS) += -Wa$(comma)-mfix-loongson2f-jump 22 endif 23endif 24 25cflags-$(CONFIG_CPU_LOONGSON3) += -Wa,--trap 26# 27# binutils from v2.25 on and gcc starting from v4.9.0 treat -march=loongson3a 28# as MIPS64 R2; older versions as just R1. This leaves the possibility open 29# that GCC might generate R2 code for -march=loongson3a which then is rejected 30# by GAS. The cc-option can't probe for this behaviour so -march=loongson3a 31# can't easily be used safely within the kbuild framework. 32# 33ifeq ($(call cc-ifversion, -ge, 0409, y), y) 34 ifeq ($(call ld-ifversion, -ge, 225000000, y), y) 35 cflags-$(CONFIG_CPU_LOONGSON3) += \ 36 $(call cc-option,-march=loongson3a -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) 37 else 38 cflags-$(CONFIG_CPU_LOONGSON3) += \ 39 $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) 40 endif 41else 42 cflags-$(CONFIG_CPU_LOONGSON3) += \ 43 $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) 44endif 45 46# 47# Loongson Machines' Support 48# 49 50platform-$(CONFIG_MACH_LOONGSON64) += loongson64/ 51cflags-$(CONFIG_MACH_LOONGSON64) += -I$(srctree)/arch/mips/include/asm/mach-loongson64 -mno-branch-likely 52load-$(CONFIG_LEMOTE_FULOONG2E) += 0xffffffff80100000 53load-$(CONFIG_LEMOTE_MACH2F) += 0xffffffff80200000 54load-$(CONFIG_LOONGSON_MACH3X) += 0xffffffff80200000 55