# This file is included by the global makefile so that you can add your own
  # architecture-specific flags and dependencies. Remember to do have actions
  # for "archclean" and "archdep" for cleaning up and making dependencies for
  # this architecture.
  #
  # This file is subject to the terms and conditions of the GNU General Public
  # License.  See the file "COPYING" in the main directory of this archive
  # for more details.
  #
  # Copyright (C) 1994 by Linus Torvalds
  # Changes for PPC by Gary Thomas
  # Rewritten by Cort Dougan and Paul Mackerras
  #

  HAS_BIARCH	:= $(call cc-option-yn, -m32)

  # Set default 32 bits cross compilers for vdso and boot wrapper
  CROSS32_COMPILE ?=
  
  CROSS32CC		:= $(CROSS32_COMPILE)gcc

  CROSS32AR		:= $(CROSS32_COMPILE)ar

  
  ifeq ($(HAS_BIARCH),y)
  ifeq ($(CROSS32_COMPILE),)
  CROSS32CC	:= $(CC) -m32

  CROSS32AR	:= GNUTARGET=elf32-powerpc $(AR)

  endif
  endif

  export CROSS32CC CROSS32AR

  ifeq ($(CROSS_COMPILE),)

  KBUILD_DEFCONFIG := $(shell uname -m)_defconfig

  else
  KBUILD_DEFCONFIG := ppc64_defconfig
  endif

  ifeq ($(CONFIG_PPC64),y)
  OLDARCH	:= ppc64

  new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
  
  ifeq ($(new_nm),y)
  NM		:= $(NM) --synthetic
  endif
  
  else

  OLDARCH	:= ppc

  endif
  
  # It seems there are times we use this Makefile without
  # including the config file, but this replicates the old behaviour
  ifeq ($(CONFIG_WORD_SIZE),)
  CONFIG_WORD_SIZE := 32

  endif

  UTS_MACHINE := $(OLDARCH)

  ifeq ($(HAS_BIARCH),y)

  override AS	+= -a$(CONFIG_WORD_SIZE)
  override LD	+= -m elf$(CONFIG_WORD_SIZE)ppc
  override CC	+= -m$(CONFIG_WORD_SIZE)
  override AR	:= GNUTARGET=elf$(CONFIG_WORD_SIZE)-powerpc $(AR)

  endif

  LDFLAGS_vmlinux-yy := -Bstatic
  LDFLAGS_vmlinux-$(CONFIG_PPC64)$(CONFIG_RELOCATABLE) := -pie
  LDFLAGS_vmlinux	:= $(LDFLAGS_vmlinux-yy)

  CFLAGS-$(CONFIG_PPC64)	:= -mminimal-toc -mtraceback=no -mcall-aixdesc

  CFLAGS-$(CONFIG_PPC32)	:= -ffixed-r2 -mmultiple
  KBUILD_CPPFLAGS	+= -Iarch/$(ARCH)
  KBUILD_AFLAGS	+= -Iarch/$(ARCH)
  KBUILD_CFLAGS	+= -msoft-float -pipe -Iarch/$(ARCH) $(CFLAGS-y)

  CPP		= $(CC) -E $(KBUILD_CFLAGS)

  CHECKFLAGS	+= -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__

  
  ifeq ($(CONFIG_PPC64),y)

  GCC_BROKEN_VEC	:= $(call cc-ifversion, -lt, 0400, y)

  
  ifeq ($(CONFIG_POWER4_ONLY),y)
  ifeq ($(CONFIG_ALTIVEC),y)
  ifeq ($(GCC_BROKEN_VEC),y)

  	KBUILD_CFLAGS += $(call cc-option,-mcpu=970)

  else

  	KBUILD_CFLAGS += $(call cc-option,-mcpu=power4)

  endif
  else

  	KBUILD_CFLAGS += $(call cc-option,-mcpu=power4)

  endif
  else

  	KBUILD_CFLAGS += $(call cc-option,-mtune=power4)

  endif
  endif

  KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o

  ifeq ($(CONFIG_TUNE_CELL),y)

  	KBUILD_CFLAGS += $(call cc-option,-mtune=cell)

  endif

  # No AltiVec instruction when building kernel

  KBUILD_CFLAGS += $(call cc-option,-mno-altivec)

  # No SPE instruction when building kernel

  # (We use all available options to help semi-broken compilers)

  KBUILD_CFLAGS += $(call cc-option,-mno-spe)

  KBUILD_CFLAGS += $(call cc-option,-mspe=no)

  # Enable unit-at-a-time mode when possible. It shrinks the
  # kernel considerably.

  KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)

  # FIXME: the module load should be taught about the additional relocs
  # generated by this.
  # revert to pre-gcc-4.4 behaviour of .eh_frame
  KBUILD_CFLAGS	+= $(call cc-option,-fno-dwarf2-cfi-asm)

  # Never use string load/store instructions as they are
  # often slow when they are implemented at all

  KBUILD_CFLAGS		+= -mno-string

  ifeq ($(CONFIG_6xx),y)

  KBUILD_CFLAGS		+= -mcpu=powerpc

  endif

  # Work around a gcc code-gen bug with -fno-omit-frame-pointer.

  ifeq ($(CONFIG_FUNCTION_TRACER),y)

  KBUILD_CFLAGS		+= -mno-sched-epilog
  endif

  cpu-as-$(CONFIG_4xx)		+= -Wa,-m405
  cpu-as-$(CONFIG_6xx)		+= -Wa,-maltivec
  cpu-as-$(CONFIG_POWER4)		+= -Wa,-maltivec
  cpu-as-$(CONFIG_E500)		+= -Wa,-me500
  cpu-as-$(CONFIG_E200)		+= -Wa,-me200

  KBUILD_AFLAGS += $(cpu-as-y)

  KBUILD_CFLAGS += $(cpu-as-y)

  head-y				:= arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o

  head-$(CONFIG_8xx)		:= arch/powerpc/kernel/head_8xx.o

  head-$(CONFIG_40x)		:= arch/powerpc/kernel/head_40x.o

  head-$(CONFIG_44x)		:= arch/powerpc/kernel/head_44x.o
  head-$(CONFIG_FSL_BOOKE)	:= arch/powerpc/kernel/head_fsl_booke.o

  head-$(CONFIG_PPC64)		+= arch/powerpc/kernel/entry_64.o

  head-$(CONFIG_PPC_FPU)		+= arch/powerpc/kernel/fpu.o

  head-$(CONFIG_ALTIVEC)		+= arch/powerpc/kernel/vector.o

  core-y				+= arch/powerpc/kernel/ \

  				   arch/powerpc/mm/ \
  				   arch/powerpc/lib/ \
  				   arch/powerpc/sysdev/ \

  				   arch/powerpc/platforms/ \

  				   arch/powerpc/math-emu/ \
  				   arch/powerpc/net/

  core-$(CONFIG_XMON)		+= arch/powerpc/xmon/

  core-$(CONFIG_KVM) 		+= arch/powerpc/kvm/

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

  # Default to zImage, override when needed

  all: zImage

  # With make 3.82 we cannot mix normal and wildcard targets

  BOOT_TARGETS1 := zImage zImage.initrd uImage

  BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.%

  PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)

  boot := arch/$(ARCH)/boot

  ifeq ($(CONFIG_RELOCATABLE),y)
  quiet_cmd_relocs_check = CALL    $<
        cmd_relocs_check = perl $< "$(OBJDUMP)" "$(obj)/vmlinux"
  
  PHONY += relocs_check
  relocs_check: arch/powerpc/relocs_check.pl vmlinux
  	$(call cmd,relocs_check)
  
  zImage: relocs_check
  endif

  $(BOOT_TARGETS1): vmlinux
  	$(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
  $(BOOT_TARGETS2): vmlinux
  	$(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
  
  
  bootwrapper_install:

  	$(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)

  %.dtb:

  	$(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)

  
  define archhelp

    @echo '* zImage          - Build default images selected by kernel config'
    @echo '  zImage.*        - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
    @echo '  uImage          - U-Boot native image format'
    @echo '  cuImage.<dt>    - Backwards compatible U-Boot image for older'
    @echo '                    versions which do not support device trees'
    @echo '  dtbImage.<dt>   - zImage with an embedded device tree blob'
    @echo '  simpleImage.<dt> - Firmware independent image.'
    @echo '  treeImage.<dt>  - Support for older IBM 4xx firmware (not U-Boot)'

    @echo '  install         - Install kernel using'

    @echo '                    (your) ~/bin/$(INSTALLKERNEL) or'
    @echo '                    (distribution) /sbin/$(INSTALLKERNEL) or'

    @echo '                    install to $$(INSTALL_PATH) and run lilo'

    @echo '  *_defconfig     - Select default config from arch/$(ARCH)/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/$(ARCH)/boot/dts/ directory'
    @echo '  (minus the .dts extension).'

  endef

  install:

  	$(Q)$(MAKE) $(build)=$(boot) install

  vdso_install:
  ifeq ($(CONFIG_PPC64),y)
  	$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
  endif
  	$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@

  archclean:

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

  archprepare: checkbin

  # Use the file '.tmp_gas_check' for binutils tests, as gas won't output
  # to stdout and these checks are run even on install targets.
  TOUT	:= .tmp_gas_check
  # Ensure this is binutils 2.12.1 (or 2.12.90.0.7) or later for altivec
  # instructions.
  # gcc-3.4 and binutils-2.14 are a fatal combination.

  
  checkbin:

  	@if test "$(call cc-version)" = "0304" ; then \

  		if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
  			echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
  			echo 'correctly with gcc-3.4 and your version of binutils.'; \
  			echo '*** Please upgrade your binutils or downgrade your gcc'; \
  			false; \
  		fi ; \
  	fi

  	@if test "$(call cc-fullversion)" = "040200" \
  	    && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
  		echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
  		echo 'kernel with modules enabled.' ; \
  		echo -n '*** Please use a different GCC version or ' ; \
  		echo 'disable kernel modules' ; \
  		false ; \
  	fi

  
  CLEAN_FILES += $(TOUT)