1#
 2# Loongson Processors' Support
 3#
 4
 5
 6cflags-$(CONFIG_CPU_LOONGSON64)	+= -Wa,--trap
 7
 8#
 9# binutils from v2.25 on and gcc starting from v4.9.0 treat -march=loongson3a
10# as MIPS64 R2; older versions as just R1.  This leaves the possibility open
11# that GCC might generate R2 code for -march=loongson3a which then is rejected
12# by GAS.  The cc-option can't probe for this behaviour so -march=loongson3a
13# can't easily be used safely within the kbuild framework.
14#
15ifeq ($(call cc-ifversion, -ge, 0409, y), y)
16  ifeq ($(call ld-ifversion, -ge, 22500, y), y)
17    cflags-$(CONFIG_CPU_LOONGSON64)  += \
18      $(call cc-option,-march=loongson3a -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64)
19  else
20    cflags-$(CONFIG_CPU_LOONGSON64)  += \
21      $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64)
22  endif
23else
24    cflags-$(CONFIG_CPU_LOONGSON64)  += \
25      $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64)
26endif
27
28# Some -march= flags enable MMI instructions, and GCC complains about that
29# support being enabled alongside -msoft-float. Thus explicitly disable MMI.
30cflags-y += $(call cc-option,-mno-loongson-mmi)
31
32#
33# Loongson Machines' Support
34#
35
36cflags-$(CONFIG_MACH_LOONGSON64) += -I$(srctree)/arch/mips/include/asm/mach-loongson64 -mno-branch-likely
37load-$(CONFIG_CPU_LOONGSON64) += 0xffffffff80200000