ifeq ($(CONFIG_MMU),y)
  UTS_SYSNAME = -DUTS_SYSNAME=\"Linux\"
  else

  UTS_SYSNAME = -DUTS_SYSNAME=\"uClinux\"

  endif

  
  # What CPU vesion are we building for, and crack it open
  # as major.minor.rev

  CPU_VER   := $(shell echo $(CONFIG_XILINX_MICROBLAZE0_HW_VER))
  CPU_MAJOR := $(shell echo $(CPU_VER) | cut -d '.' -f 1)
  CPU_MINOR := $(shell echo $(CPU_VER) | cut -d '.' -f 2)
  CPU_REV   := $(shell echo $(CPU_VER) | cut -d '.' -f 3)

  
  export CPU_VER CPU_MAJOR CPU_MINOR CPU_REV
  
  # Use cpu-related CONFIG_ vars to set compile options.

  # The various CONFIG_XILINX cpu features options are integers 0/1/2...
  # rather than bools y/n

  # Work out HW multipler support. This is tricky.

  # 1. Spartan2 has no HW multipliers.

  # 2. MicroBlaze v3.x always uses them, except in Spartan 2
  # 3. All other FPGa/CPU ver combos, we can trust the CONFIG_ settings
  ifeq (,$(findstring spartan2,$(CONFIG_XILINX_MICROBLAZE0_FAMILY)))
    ifeq ($(CPU_MAJOR),3)
      CPUFLAGS-1 += -mno-xl-soft-mul
    else

      # USE_HW_MUL can be 0, 1, or 2, defining a hierarchy of HW Mul support.

      CPUFLAGS-$(subst 1,,$(CONFIG_XILINX_MICROBLAZE0_USE_HW_MUL)) += -mxl-multiply-high
      CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_HW_MUL) += -mno-xl-soft-mul
    endif
  endif
  CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_DIV) += -mno-xl-soft-div
  CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_BARREL) += -mxl-barrel-shift

  CPUFLAGS-$(CONFIG_XILINX_MICROBLAZE0_USE_PCMP_INSTR) += -mxl-pattern-compare

  
  CPUFLAGS-1 += $(call cc-option,-mcpu=v$(CPU_VER))

  # r31 holds current when in kernel mode

  KBUILD_CFLAGS += -ffixed-r31 $(CPUFLAGS-1) $(CPUFLAGS-2)

  LDFLAGS		:=
  LDFLAGS_vmlinux	:=

  head-y := arch/microblaze/kernel/head.o
  libs-y += arch/microblaze/lib/

  core-y += arch/microblaze/kernel/
  core-y += arch/microblaze/mm/
  core-y += arch/microblaze/platform/

  core-$(CONFIG_PCI) += arch/microblaze/pci/

  drivers-$(CONFIG_OPROFILE) += arch/microblaze/oprofile/

  boot := arch/microblaze/boot

  # Are we making a simpleImage.<boardname> target? If so, crack out the boardname
  DTB:=$(subst simpleImage.,,$(filter simpleImage.%, $(MAKECMDGOALS)))
  
  ifneq ($(DTB),)
  	core-y	+= $(boot)/
  endif

  # defines filename extension depending memory management type
  ifeq ($(CONFIG_MMU),)

  MMU := -nommu

  endif

  export MMU DTB

  
  all: linux.bin

  # With make 3.82 we cannot mix normal and wildcard targets
  BOOT_TARGETS1 = linux.bin linux.bin.gz
  BOOT_TARGETS2 = simpleImage.%

  archclean:
  	$(Q)$(MAKE) $(clean)=$(boot)

  $(BOOT_TARGETS1): vmlinux
  	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
  $(BOOT_TARGETS2): vmlinux

  	$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
  
  define archhelp

    echo '* linux.bin    - Create raw binary'
    echo '  linux.bin.gz - Create compressed raw binary'
    echo '  simpleImage.<dt> - ELF image with $(arch)/boot/dts/<dt>.dts linked in'

    echo '                   - stripped elf with fdt blob'

    echo '  simpleImage.<dt>.unstrip - full ELF image with fdt blob'
    echo '  *_defconfig      - Select default config from arch/microblaze/configs'
    echo ''
    echo '  Targets with <dt> embed a device tree blob inside the image'
    echo '  These targets support board with firmware that does not'
    echo '  support passing a device tree directly. Replace <dt> with the'
    echo '  name of a dts file from the arch/microblaze/boot/dts/ directory'
    echo '  (minus the .dts extension).'

  endef

  
  MRPROPER_FILES += $(boot)/simpleImage.*