arch/mips/loongson64/Platform

   1 #
   2 # Loongson Processors' Support
   3 #
   4
   5 # Only gcc >= 4.4 have Loongson specific support
   6 cflags-$(CONFIG_CPU_LOONGSON2)  += -Wa,--trap
   7 cflags-$(CONFIG_CPU_LOONGSON2E) += \
   8         $(call cc-option,-march=loongson2e,-march=r4600)
   9 cflags-$(CONFIG_CPU_LOONGSON2F) += \
  10         $(call cc-option,-march=loongson2f,-march=r4600)
  11 # Enable the workarounds for Loongson2f
  12 ifdef CONFIG_CPU_LOONGSON2F_WORKAROUNDS
  13   ifeq ($(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$(comma)-mfix-loongson2f-jump
  22   endif
  23 endif
  24
  25 cflags-$(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 #
  33 ifeq ($(call cc-ifversion, -ge, 0409, y), y)
  34   ifeq ($(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       $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64)
  40   endif
  41 else
  42     cflags-$(CONFIG_CPU_LOONGSON3)  += \
  43       $(call cc-option,-march=mips64r2,-mips64r2 -U_MIPS_ISA -D_MIPS_ISA=_MIPS_ISA_MIPS64)
  44 endif
  45
  46 #
  47 # Loongson Machines' Support
  48 #
  49
  50 platform-$(CONFIG_MACH_LOONGSON64) += loongson64/
  51 cflags-$(CONFIG_MACH_LOONGSON64) += -I$(srctree)/arch/mips/include/asm/mach-loongson64 -mno-branch-likely
  52 load-$(CONFIG_LEMOTE_FULOONG2E) += 0xffffffff80100000
  53 load-$(CONFIG_LEMOTE_MACH2F) += 0xffffffff80200000
  54 load-$(CONFIG_LOONGSON_MACH3X) += 0xffffffff80200000