| # |
| # Loongson Processors' Support |
| # |
| |
| |
| cflags-$(CONFIG_CPU_LOONGSON64) += -Wa,--trap |
| |
| # |
| # binutils from v2.25 on and gcc starting from v4.9.0 treat -march=loongson3a |
| # as MIPS64 R2; older versions as just R1. This leaves the possibility open |
| # that GCC might generate R2 code for -march=loongson3a which then is rejected |
| # by GAS. The cc-option can't probe for this behaviour so -march=loongson3a |
| # can't easily be used safely within the kbuild framework. |
| # |
| ifeq ($(call cc-ifversion, -ge, 0409, y), y) |
| ifeq ($(call ld-ifversion, -ge, 225000000, y), y) |
| cflags-$(CONFIG_CPU_LOONGSON64) += \ |
| $(call cc-option,-march=loongson3a -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) |
| else |
| cflags-$(CONFIG_CPU_LOONGSON64) += \ |
| $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) |
| endif |
| else |
| cflags-$(CONFIG_CPU_LOONGSON64) += \ |
| $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64) |
| endif |
| |
| # Some -march= flags enable MMI instructions, and GCC complains about that |
| # support being enabled alongside -msoft-float. Thus explicitly disable MMI. |
| cflags-y += $(call cc-option,-mno-loongson-mmi) |
| |
| # |
| # Loongson Machines' Support |
| # |
| |
| cflags-$(CONFIG_MACH_LOONGSON64) += -I$(srctree)/arch/mips/include/asm/mach-loongson64 -mno-branch-likely |
| load-$(CONFIG_CPU_LOONGSON64) += 0xffffffff80200000 |
