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# 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
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CROSS32AR		:= $(CROSS32_COMPILE)ar
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ifeq ($(HAS_BIARCH),y)
ifeq ($(CROSS32_COMPILE),)
CROSS32CC	:= $(CC) -m32
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CROSS32AR	:= GNUTARGET=elf32-powerpc $(AR)
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endif
endif

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export CROSS32CC CROSS32AR
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ifeq ($(CROSS_COMPILE),)
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KBUILD_DEFCONFIG := $(shell uname -m)_defconfig
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else
KBUILD_DEFCONFIG := ppc64_defconfig
endif
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ifeq ($(CONFIG_PPC64),y)
OLDARCH	:= ppc64

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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
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OLDARCH	:= ppc
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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
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endif

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UTS_MACHINE := $(OLDARCH)

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ifeq ($(HAS_BIARCH),y)
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override AS	+= -a$(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)
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endif

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LDFLAGS_vmlinux-yy := -Bstatic
LDFLAGS_vmlinux-$(CONFIG_PPC64)$(CONFIG_RELOCATABLE) := -pie
LDFLAGS_vmlinux	:= $(LDFLAGS_vmlinux-yy)
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CFLAGS-$(CONFIG_PPC64)	:= -mminimal-toc -mtraceback=none  -mcall-aixdesc
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CFLAGS-$(CONFIG_PPC32)	:= -ffixed-r2 -mmultiple
KBUILD_CPPFLAGS	+= -Iarch/$(ARCH)
KBUILD_AFLAGS	+= -Iarch/$(ARCH)
KBUILD_CFLAGS	+= -msoft-float -pipe -Iarch/$(ARCH) $(CFLAGS-y)
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CPP		= $(CC) -E $(KBUILD_CFLAGS)
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CHECKFLAGS	+= -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__
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ifeq ($(CONFIG_PPC64),y)
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GCC_BROKEN_VEC	:= $(call cc-ifversion, -lt, 0400, y)
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ifeq ($(CONFIG_POWER4_ONLY),y)
ifeq ($(CONFIG_ALTIVEC),y)
ifeq ($(GCC_BROKEN_VEC),y)
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	KBUILD_CFLAGS += $(call cc-option,-mcpu=970)
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else
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	KBUILD_CFLAGS += $(call cc-option,-mcpu=power4)
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endif
else
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	KBUILD_CFLAGS += $(call cc-option,-mcpu=power4)
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endif
else
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	KBUILD_CFLAGS += $(call cc-option,-mtune=power4)
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endif
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else
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KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
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endif

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ifeq ($(CONFIG_TUNE_CELL),y)
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	KBUILD_CFLAGS += $(call cc-option,-mtune=cell)
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endif

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# No AltiVec instruction when building kernel
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KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
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# No SPE instruction when building kernel
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# (We use all available options to help semi-broken compilers)
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KBUILD_CFLAGS += $(call cc-option,-mno-spe)
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KBUILD_CFLAGS += $(call cc-option,-mspe=no)
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# Enable unit-at-a-time mode when possible. It shrinks the
# kernel considerably.
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KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
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# 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)

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# Never use string load/store instructions as they are
# often slow when they are implemented at all
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KBUILD_CFLAGS		+= -mno-string
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ifeq ($(CONFIG_6xx),y)
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KBUILD_CFLAGS		+= -mcpu=powerpc
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endif

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# Work around a gcc code-gen bug with -fno-omit-frame-pointer.
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ifeq ($(CONFIG_FUNCTION_TRACER),y)
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KBUILD_CFLAGS		+= -mno-sched-epilog
endif

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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

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KBUILD_AFLAGS += $(cpu-as-y)
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KBUILD_CFLAGS += $(cpu-as-y)
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head-y				:= arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o
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head-$(CONFIG_8xx)		:= arch/powerpc/kernel/head_8xx.o
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head-$(CONFIG_40x)		:= arch/powerpc/kernel/head_40x.o
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head-$(CONFIG_44x)		:= arch/powerpc/kernel/head_44x.o
head-$(CONFIG_FSL_BOOKE)	:= arch/powerpc/kernel/head_fsl_booke.o

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head-$(CONFIG_PPC64)		+= arch/powerpc/kernel/entry_64.o
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head-$(CONFIG_PPC_FPU)		+= arch/powerpc/kernel/fpu.o
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head-$(CONFIG_ALTIVEC)		+= arch/powerpc/kernel/vector.o
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core-y				+= arch/powerpc/kernel/ \
				   arch/powerpc/mm/ \
				   arch/powerpc/lib/ \
				   arch/powerpc/sysdev/ \
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				   arch/powerpc/platforms/ \
				   arch/powerpc/math-emu/
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core-$(CONFIG_XMON)		+= arch/powerpc/xmon/
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core-$(CONFIG_KVM) 		+= arch/powerpc/kvm/
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drivers-$(CONFIG_OPROFILE)	+= arch/powerpc/oprofile/

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# Default to zImage, override when needed
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all: zImage
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BOOT_TARGETS = zImage zImage.initrd uImage zImage% dtbImage% treeImage.% cuImage.% simpleImage.%
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PHONY += $(BOOT_TARGETS)
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boot := arch/$(ARCH)/boot
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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

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$(BOOT_TARGETS): vmlinux
	$(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
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bootwrapper_install %.dtb:
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	$(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
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define archhelp
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  @echo '* zImage          - Build default images selected by kernel config'
  @echo '  zImage.*        - Compressed kernel image (arch/$(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)'
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  @echo '  install         - Install kernel using'
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  @echo '                    (your) ~/bin/$(INSTALLKERNEL) or'
  @echo '                    (distribution) /sbin/$(INSTALLKERNEL) or'
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  @echo '                    install to $$(INSTALL_PATH) and run lilo'
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  @echo '  *_defconfig     - Select default config from arch/$(ARCH)/configs'
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  @echo ''
  @echo '  Targets with <dt> embed a device tree blob inside the image'
  @echo '  These targets support board with firmware that does not'
  @echo '  support passing a device tree directly.  Replace <dt> with the'
  @echo '  name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
  @echo '  (minus the .dts extension).'
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endef

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

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archclean:
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	$(Q)$(MAKE) $(clean)=$(boot)
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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:
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	@if test "$(call cc-version)" = "0304" ; then \
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		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
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	@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
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	@if ! /bin/echo dssall | $(AS) -many -o $(TOUT) >/dev/null 2>&1 ; then \
		echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build ' ; \
		echo 'correctly with old versions of binutils.' ; \
		echo '*** Please upgrade your binutils to 2.12.1 or newer' ; \
		false ; \
	fi

CLEAN_FILES += $(TOUT)