59 lines
2.3 KiB
Plaintext
59 lines
2.3 KiB
Plaintext
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#
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# Loongson Processors' Support
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#
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# Only gcc >= 4.4 have Loongson specific support
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cflags-$(CONFIG_CPU_LOONGSON2) += -Wa,--trap
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cflags-$(CONFIG_CPU_LOONGSON2E) += \
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$(call cc-option,-march=loongson2e,-march=r4600)
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cflags-$(CONFIG_CPU_LOONGSON2F) += \
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$(call cc-option,-march=loongson2f,-march=r4600)
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# Enable the workarounds for Loongson2f
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ifdef CONFIG_CPU_LOONGSON2F_WORKAROUNDS
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ifeq ($(call as-option,-Wa$(comma)-mfix-loongson2f-nop,),)
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$(error only binutils >= 2.20.2 have needed option -mfix-loongson2f-nop)
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else
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cflags-$(CONFIG_CPU_NOP_WORKAROUNDS) += -Wa$(comma)-mfix-loongson2f-nop
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endif
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ifeq ($(call as-option,-Wa$(comma)-mfix-loongson2f-jump,),)
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$(error only binutils >= 2.20.2 have needed option -mfix-loongson2f-jump)
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else
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cflags-$(CONFIG_CPU_JUMP_WORKAROUNDS) += -Wa$(comma)-mfix-loongson2f-jump
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endif
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endif
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cflags-$(CONFIG_CPU_LOONGSON3) += -Wa,--trap
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#
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# binutils from v2.25 on and gcc starting from v4.9.0 treat -march=loongson3a
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# as MIPS64 R2; older versions as just R1. This leaves the possibility open
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# that GCC might generate R2 code for -march=loongson3a which then is rejected
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# by GAS. The cc-option can't probe for this behaviour so -march=loongson3a
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# can't easily be used safely within the kbuild framework.
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#
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ifeq ($(call cc-ifversion, -ge, 0409, y), y)
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ifeq ($(call ld-ifversion, -ge, 225000000, y), y)
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cflags-$(CONFIG_CPU_LOONGSON3) += \
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$(call cc-option,-march=loongson3a -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64)
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else
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cflags-$(CONFIG_CPU_LOONGSON3) += \
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$(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64)
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endif
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else
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cflags-$(CONFIG_CPU_LOONGSON3) += \
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$(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64)
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endif
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# Some -march= flags enable MMI instructions, and GCC complains about that
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# support being enabled alongside -msoft-float. Thus explicitly disable MMI.
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cflags-y += $(call cc-option,-mno-loongson-mmi)
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#
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# Loongson Machines' Support
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#
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platform-$(CONFIG_MACH_LOONGSON64) += loongson64/
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cflags-$(CONFIG_MACH_LOONGSON64) += -I$(srctree)/arch/mips/include/asm/mach-loongson64 -mno-branch-likely
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load-$(CONFIG_LEMOTE_FULOONG2E) += 0xffffffff80100000
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load-$(CONFIG_LEMOTE_MACH2F) += 0xffffffff80200000
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load-$(CONFIG_LOONGSON_MACH3X) += 0xffffffff80200000
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