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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 := $(call cc-option-yn, -m32)
- # Set default 32 bits cross compilers for vdso and boot wrapper
- CROSS32_COMPILE ?=
- ifeq ($(HAS_BIARCH),y)
- ifeq ($(CROSS32_COMPILE),)
- ifdef CONFIG_PPC32
- # These options will be overridden by any -mcpu option that the CPU
- # or platform code sets later on the command line, but they are needed
- # to set a sane 32-bit cpu target for the 64-bit cross compiler which
- # may default to the wrong ISA.
- KBUILD_CFLAGS += -mcpu=powerpc
- KBUILD_AFLAGS += -mcpu=powerpc
- endif
- endif
- endif
- ifdef CONFIG_PPC_BOOK3S_32
- KBUILD_CFLAGS += -mcpu=powerpc
- endif
- # If we're on a ppc/ppc64/ppc64le machine use that defconfig, otherwise just use
- # ppc64_defconfig because we have nothing better to go on.
- uname := $(shell uname -m)
- KBUILD_DEFCONFIG := $(if $(filter ppc%,$(uname)),$(uname),ppc64)_defconfig
- new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
- ifeq ($(new_nm),y)
- NM := $(NM) --synthetic
- endif
- # BITS is used as extension for files which are available in a 32 bit
- # and a 64 bit version to simplify shared Makefiles.
- # e.g.: obj-y += foo_$(BITS).o
- export BITS
- ifdef CONFIG_PPC64
- BITS := 64
- else
- BITS := 32
- endif
- machine-y = ppc
- machine-$(CONFIG_PPC64) += 64
- machine-$(CONFIG_CPU_LITTLE_ENDIAN) += le
- UTS_MACHINE := $(subst $(space),,$(machine-y))
- # XXX This needs to be before we override LD below
- ifdef CONFIG_PPC32
- KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
- else
- ifeq ($(call ld-ifversion, -ge, 225000000, y),y)
- # Have the linker provide sfpr if possible.
- # There is a corresponding test in arch/powerpc/lib/Makefile
- KBUILD_LDFLAGS_MODULE += --save-restore-funcs
- else
- KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
- endif
- endif
- ifdef CONFIG_CPU_LITTLE_ENDIAN
- KBUILD_CFLAGS += -mlittle-endian
- KBUILD_LDFLAGS += -EL
- LDEMULATION := lppc
- GNUTARGET := powerpcle
- MULTIPLEWORD := -mno-multiple
- KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect)
- else
- KBUILD_CFLAGS += $(call cc-option,-mbig-endian)
- KBUILD_LDFLAGS += -EB
- LDEMULATION := ppc
- GNUTARGET := powerpc
- MULTIPLEWORD := -mmultiple
- endif
- ifdef CONFIG_PPC64
- ifndef CONFIG_CC_IS_CLANG
- cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1)
- cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mcall-aixdesc)
- aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1)
- aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mabi=elfv2
- endif
- endif
- ifndef CONFIG_CC_IS_CLANG
- cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align
- endif
- cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
- cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
- aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
- aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
- ifeq ($(HAS_BIARCH),y)
- KBUILD_CFLAGS += -m$(BITS)
- KBUILD_AFLAGS += -m$(BITS) -Wl,-a$(BITS)
- KBUILD_LDFLAGS += -m elf$(BITS)$(LDEMULATION)
- endif
- cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard=tls
- ifdef CONFIG_PPC64
- cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r13
- else
- cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r2
- endif
- LDFLAGS_vmlinux-y := -Bstatic
- LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
- LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y)
- ifdef CONFIG_PPC64
- ifeq ($(call cc-option-yn,-mcmodel=medium),y)
- # -mcmodel=medium breaks modules because it uses 32bit offsets from
- # the TOC pointer to create pointers where possible. Pointers into the
- # percpu data area are created by this method.
- #
- # The kernel module loader relocates the percpu data section from the
- # original location (starting with 0xd...) to somewhere in the base
- # kernel percpu data space (starting with 0xc...). We need a full
- # 64bit relocation for this to work, hence -mcmodel=large.
- KBUILD_CFLAGS_MODULE += -mcmodel=large
- else
- export NO_MINIMAL_TOC := -mno-minimal-toc
- endif
- endif
- CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no)
- ifndef CONFIG_CC_IS_CLANG
- ifdef CONFIG_CPU_LITTLE_ENDIAN
- CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc))
- AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2)
- else
- CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
- CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc)
- AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
- endif
- endif
- CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc))
- CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions)
- # Clang unconditionally reserves r2 on ppc32 and does not support the flag
- # https://bugs.llvm.org/show_bug.cgi?id=39555
- CFLAGS-$(CONFIG_PPC32) := $(call cc-option, -ffixed-r2)
- # Clang doesn't support -mmultiple / -mno-multiple
- # https://bugs.llvm.org/show_bug.cgi?id=39556
- CFLAGS-$(CONFIG_PPC32) += $(call cc-option, $(MULTIPLEWORD))
- CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata)
- ifdef CONFIG_PPC_BOOK3S_64
- ifdef CONFIG_CPU_LITTLE_ENDIAN
- CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8
- CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power9,-mtune=power8)
- else
- CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5))
- CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mcpu=power5,-mcpu=power4)
- endif
- else ifdef CONFIG_PPC_BOOK3E_64
- CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
- endif
- ifdef CONFIG_FUNCTION_TRACER
- CC_FLAGS_FTRACE := -pg
- ifdef CONFIG_MPROFILE_KERNEL
- CC_FLAGS_FTRACE += -mprofile-kernel
- endif
- # Work around gcc code-gen bugs with -pg / -fno-omit-frame-pointer in gcc <= 4.8
- # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44199
- # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52828
- ifndef CONFIG_CC_IS_CLANG
- CC_FLAGS_FTRACE += $(call cc-ifversion, -lt, 0409, -mno-sched-epilog)
- endif
- endif
- CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU))
- # Altivec option not allowed with e500mc64 in GCC.
- ifdef CONFIG_ALTIVEC
- E5500_CPU := -mcpu=powerpc64
- else
- E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
- endif
- CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU)
- CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
- ifdef CONFIG_PPC32
- ifdef CONFIG_PPC_E500MC
- CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc)
- else
- CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc)
- endif
- endif
- asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
- KBUILD_CPPFLAGS += -I $(srctree)/arch/$(ARCH) $(asinstr)
- KBUILD_AFLAGS += $(AFLAGS-y)
- KBUILD_CFLAGS += $(call cc-option,-msoft-float)
- KBUILD_CFLAGS += -pipe $(CFLAGS-y)
- CPP = $(CC) -E $(KBUILD_CFLAGS)
- CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__
- ifdef CONFIG_CPU_BIG_ENDIAN
- CHECKFLAGS += -D__BIG_ENDIAN__
- else
- CHECKFLAGS += -D__LITTLE_ENDIAN__
- endif
- ifdef CONFIG_476FPE_ERR46
- KBUILD_LDFLAGS_MODULE += --ppc476-workaround \
- -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds
- endif
- # No AltiVec or VSX instructions when building kernel
- KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
- KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
- # 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)
- # Don't emit .eh_frame since we have no use for it
- KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
- # Never use string load/store instructions as they are
- # often slow when they are implemented at all
- KBUILD_CFLAGS += $(call cc-option,-mno-string)
- cpu-as-$(CONFIG_40x) += -Wa,-m405
- cpu-as-$(CONFIG_44x) += -Wa,-m440
- cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec)
- cpu-as-$(CONFIG_E500) += -Wa,-me500
- # When using '-many -mpower4' gas will first try and find a matching power4
- # mnemonic and failing that it will allow any valid mnemonic that GAS knows
- # about. GCC will pass -many to GAS when assembling, clang does not.
- cpu-as-$(CONFIG_PPC_BOOK3S_64) += -Wa,-mpower4 -Wa,-many
- cpu-as-$(CONFIG_PPC_E500MC) += $(call as-option,-Wa$(comma)-me500mc)
- KBUILD_AFLAGS += $(cpu-as-y)
- KBUILD_CFLAGS += $(cpu-as-y)
- KBUILD_AFLAGS += $(aflags-y)
- KBUILD_CFLAGS += $(cflags-y)
- head-$(CONFIG_PPC64) := arch/powerpc/kernel/head_64.o
- head-$(CONFIG_PPC_BOOK3S_32) := arch/powerpc/kernel/head_book3s_32.o
- head-$(CONFIG_PPC_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
- head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o
- # See arch/powerpc/Kbuild for content of core part of the kernel
- core-y += arch/powerpc/
- drivers-$(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.% uImage.%
- PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
- boot := arch/$(ARCH)/boot
- $(BOOT_TARGETS1): vmlinux
- $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
- $(BOOT_TARGETS2): vmlinux
- $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
- PHONY += bootwrapper_install
- bootwrapper_install:
- $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
- # Used to create 'merged defconfigs'
- # To use it $(call) it with the first argument as the base defconfig
- # and the second argument as a space separated list of .config files to merge,
- # without the .config suffix.
- define merge_into_defconfig
- $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
- -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \
- $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config)
- +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
- endef
- PHONY += pseries_le_defconfig
- pseries_le_defconfig:
- $(call merge_into_defconfig,pseries_defconfig,le)
- PHONY += ppc64le_defconfig
- ppc64le_defconfig:
- $(call merge_into_defconfig,ppc64_defconfig,le)
- PHONY += ppc64le_guest_defconfig
- ppc64le_guest_defconfig:
- $(call merge_into_defconfig,ppc64_defconfig,le guest)
- PHONY += ppc64_guest_defconfig
- ppc64_guest_defconfig:
- $(call merge_into_defconfig,ppc64_defconfig,be guest)
- PHONY += powernv_be_defconfig
- powernv_be_defconfig:
- $(call merge_into_defconfig,powernv_defconfig,be)
- PHONY += mpc85xx_defconfig
- mpc85xx_defconfig:
- $(call merge_into_defconfig,mpc85xx_base.config,\
- 85xx-32bit 85xx-hw fsl-emb-nonhw)
- PHONY += mpc85xx_smp_defconfig
- mpc85xx_smp_defconfig:
- $(call merge_into_defconfig,mpc85xx_base.config,\
- 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)
- PHONY += corenet32_smp_defconfig
- corenet32_smp_defconfig:
- $(call merge_into_defconfig,corenet_base.config,\
- 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa)
- PHONY += corenet64_smp_defconfig
- corenet64_smp_defconfig:
- $(call merge_into_defconfig,corenet_base.config,\
- 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa)
- PHONY += mpc86xx_defconfig
- mpc86xx_defconfig:
- $(call merge_into_defconfig,mpc86xx_base.config,\
- 86xx-hw fsl-emb-nonhw)
- PHONY += mpc86xx_smp_defconfig
- mpc86xx_smp_defconfig:
- $(call merge_into_defconfig,mpc86xx_base.config,\
- 86xx-smp 86xx-hw fsl-emb-nonhw)
- PHONY += ppc32_allmodconfig
- ppc32_allmodconfig:
- $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \
- -f $(srctree)/Makefile allmodconfig
- PHONY += ppc_defconfig
- ppc_defconfig:
- $(call merge_into_defconfig,book3s_32.config,)
- PHONY += ppc64le_allmodconfig
- ppc64le_allmodconfig:
- $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \
- -f $(srctree)/Makefile allmodconfig
- PHONY += ppc64_book3e_allmodconfig
- ppc64_book3e_allmodconfig:
- $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \
- -f $(srctree)/Makefile allmodconfig
- define archhelp
- @echo '* zImage - Build default images selected by kernel config'
- @echo ' zImage.* - Compressed kernel image (arch/$(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 $$(INSTALL_PATH) and run lilo'
- @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs'
- @echo ''
- @echo ' Targets with <dt> embed a device tree blob inside the image'
- @echo ' These targets support board with firmware that does not'
- @echo ' support passing a device tree directly. Replace <dt> with the'
- @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
- @echo ' (minus the .dts extension).'
- endef
- PHONY += install
- install:
- $(Q)$(MAKE) $(build)=$(boot) install
- PHONY += vdso_install
- vdso_install:
- ifdef CONFIG_PPC64
- $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
- endif
- ifdef CONFIG_VDSO32
- $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
- endif
- archclean:
- $(Q)$(MAKE) $(clean)=$(boot)
- archprepare: checkbin
- archheaders:
- $(Q)$(MAKE) $(build)=arch/powerpc/kernel/syscalls all
- ifdef CONFIG_STACKPROTECTOR
- prepare: stack_protector_prepare
- PHONY += stack_protector_prepare
- stack_protector_prepare: prepare0
- ifdef CONFIG_PPC64
- $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' include/generated/asm-offsets.h))
- else
- $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' include/generated/asm-offsets.h))
- endif
- endif
- ifdef CONFIG_SMP
- prepare: task_cpu_prepare
- PHONY += task_cpu_prepare
- task_cpu_prepare: prepare0
- $(eval KBUILD_CFLAGS += -D_TASK_CPU=$(shell awk '{if ($$2 == "TASK_CPU") print $$3;}' include/generated/asm-offsets.h))
- endif
- PHONY += checkbin
- # Check toolchain versions:
- # - gcc-4.6 is the minimum kernel-wide version so nothing required.
- checkbin:
- @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \
- && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \
- echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \
- echo 'in some circumstances.' ; \
- echo -n '*** Please use a different binutils version.' ; \
- false ; \
- fi
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