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37 lines
1.3 KiB
37 lines
1.3 KiB
# |
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# Loongson Processors' Support |
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# |
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cflags-$(CONFIG_CPU_LOONGSON64) += -Wa,--trap |
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# |
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# binutils from v2.25 on and gcc starting from v4.9.0 treat -march=loongson3a |
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# as MIPS64 R2; older versions as just R1. This leaves the possibility open |
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# that GCC might generate R2 code for -march=loongson3a which then is rejected |
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# by GAS. The cc-option can't probe for this behaviour so -march=loongson3a |
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# can't easily be used safely within the kbuild framework. |
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# |
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ifeq ($(call cc-ifversion, -ge, 0409, y), y) |
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ifeq ($(call ld-ifversion, -ge, 22500, y), y) |
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cflags-$(CONFIG_CPU_LOONGSON64) += \ |
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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_LOONGSON64) += \ |
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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_LOONGSON64) += \ |
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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 += $(call cc-option,-mno-loongson-mmi) |
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# |
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# Loongson Machines' Support |
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# |
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cflags-$(CONFIG_MACH_LOONGSON64) += -I$(srctree)/arch/mips/include/asm/mach-loongson64 -mno-branch-likely |
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load-$(CONFIG_CPU_LOONGSON64) += 0xffffffff80200000
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