# This file is included by the global makefile so that you can add your own# architecture-specific flags and dependencies.## 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# ifdef cross_compiling ifeq ($(CROSS_COMPILE),) # Auto detect cross compiler prefix. # Look for: (powerpc(64(le)?)?)(-unknown)?-linux(-gnu)?- CC_ARCHES := powerpc powerpc64 powerpc64le CC_SUFFIXES := linux linux-gnu unknown-linux-gnu CROSS_COMPILE := $(call cc-cross-prefix, $(foreach a,$(CC_ARCHES), \ $(foreach s,$(CC_SUFFIXES),$(a)-$(s)-))) endifendif HAS_BIARCH := $(call cc-option-yn, -m32) # Set default 32 bits cross compilers for vdso and boot wrapperCROSS32_COMPILE ?= # If we're on a ppc/ppc64/ppc64le machine use that defconfig, otherwise just use# ppc64le_defconfig because we have nothing better to go on.uname := $(shell uname -m)KBUILD_DEFCONFIG := $(if $(filter ppc%,$(uname)),$(uname),ppc64le)_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 := $(NM) --syntheticendif # BITS is used as extension for files which are available in a 32 bit# and a 64 bit version to simplify shared Makefiles.# e.g.: obj-y += foo_$(BITS).oexport BITS ifdef CONFIG_PPC64 BITS := 64else BITS := 32endif machine-y = ppcmachine-$(CONFIG_PPC64) += 64machine-$(CONFIG_CPU_LITTLE_ENDIAN) += leUTS_MACHINE := $(subst $(space),,$(machine-y)) ifeq ($(CONFIG_PPC64)$(CONFIG_LD_IS_BFD),yy)# Have the linker provide sfpr if possible.# There is a corresponding test in arch/powerpc/lib/MakefileKBUILD_LDFLAGS_MODULE += --save-restore-funcselseKBUILD_LDFLAGS_MODULE += $(objtree)/arch/powerpc/lib/crtsavres.oendif ifdef CONFIG_PPC64KBUILD_RUSTFLAGS += --target=powerpc64le-unknown-linux-gnuKBUILD_RUSTFLAGS += -Ctarget-feature=-mma,-vsx,-hard-float,-altivecelseKBUILD_RUSTFLAGS += --target=powerpc-unknown-linux-gnuendif ifdef CONFIG_CPU_LITTLE_ENDIANKBUILD_CPPFLAGS += -mlittle-endianKBUILD_LDFLAGS += -ELLDEMULATION := lppcGNUTARGET := powerpcleMULTIPLEWORD := -mno-multipleKBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect)elseKBUILD_CPPFLAGS += $(call cc-option,-mbig-endian)KBUILD_LDFLAGS += -EBLDEMULATION := ppcGNUTARGET := powerpcMULTIPLEWORD := -mmultipleendif ifdef CONFIG_PPC64ifndef CONFIG_CC_IS_CLANGcflags-$(CONFIG_PPC64_ELF_ABI_V1) += $(call cc-option,-mabi=elfv1)cflags-$(CONFIG_PPC64_ELF_ABI_V1) += $(call cc-option,-mcall-aixdesc)aflags-$(CONFIG_PPC64_ELF_ABI_V1) += $(call cc-option,-mabi=elfv1)aflags-$(CONFIG_PPC64_ELF_ABI_V2) += -mabi=elfv2endifendif ifndef CONFIG_CC_IS_CLANG cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-alignendif cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endianaflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian ifeq ($(HAS_BIARCH),y)KBUILD_CPPFLAGS += -m$(BITS)KBUILD_AFLAGS += -m$(BITS)KBUILD_LDFLAGS += -m elf$(BITS)$(LDEMULATION)endif LDFLAGS_vmlinux-y := -BstaticLDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie --no-dynamic-linkerLDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) += -z notextLDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y) ifdef CONFIG_PPC64ifndef CONFIG_PPC_KERNEL_PCREL # -mcmodel=medium breaks modules because it uses 32bit offsets from # the TOC pointer to create pointers where possible. Pointers into the # percpu data area are created by this method. # # The kernel module loader relocates the percpu data section from the # original location (starting with 0xd...) to somewhere in the base # kernel percpu data space (starting with 0xc...). We need a full # 64bit relocation for this to work, hence -mcmodel=large. KBUILD_CFLAGS_MODULE += -mcmodel=largeendifendif CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no)ifdef CONFIG_PPC64_ELF_ABI_V2CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc))elseifndef CONFIG_CC_IS_CLANGCFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc)endifendifCFLAGS-$(CONFIG_PPC64) += -mcmodel=mediumCFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions)CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mlong-double-128) # Clang unconditionally reserves r2 on ppc32 and does not support the flag# https://llvm.org/pr39555CFLAGS-$(CONFIG_PPC32) := $(call cc-option, -ffixed-r2) # Clang doesn't support -mmultiple / -mno-multiple# https://llvm.org/pr39556CFLAGS-$(CONFIG_PPC32) += $(call cc-option, $(MULTIPLEWORD)) CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata) CC_FLAGS_FPU := $(call cc-option,-mhard-float)CC_FLAGS_NO_FPU := $(call cc-option,-msoft-float) ifdef CONFIG_FUNCTION_TRACERifdef CONFIG_ARCH_USING_PATCHABLE_FUNCTION_ENTRYKBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRYifdef CONFIG_PPC_FTRACE_OUT_OF_LINECC_FLAGS_FTRACE := -fpatchable-function-entry=1elseifdef CONFIG_DYNAMIC_FTRACE_WITH_CALL_OPS # PPC32 onlyCC_FLAGS_FTRACE := -fpatchable-function-entry=3,1elseCC_FLAGS_FTRACE := -fpatchable-function-entry=2endifendifelseCC_FLAGS_FTRACE := -pgifdef CONFIG_MPROFILE_KERNELCC_FLAGS_FTRACE += -mprofile-kernelendifendifendif CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += -mcpu=$(CONFIG_TARGET_CPU)AFLAGS-$(CONFIG_TARGET_CPU_BOOL) += -mcpu=$(CONFIG_TARGET_CPU) CFLAGS-y += $(CONFIG_TUNE_CPU) asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1) KBUILD_CPPFLAGS += -I $(srctree)/arch/powerpc $(asinstr)KBUILD_AFLAGS += $(AFLAGS-y)KBUILD_CFLAGS += $(CC_FLAGS_NO_FPU)KBUILD_CFLAGS += $(CFLAGS-y) CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__ifdef CONFIG_CPU_BIG_ENDIANCHECKFLAGS += -D__BIG_ENDIAN__elseCHECKFLAGS += -D__LITTLE_ENDIAN__endif ifdef CONFIG_476FPE_ERR46 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \ -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.ldsendif # No prefix or pcrelifdef CONFIG_PPC_KERNEL_PREFIXEDKBUILD_CFLAGS += $(call cc-option,-mprefixed)elseKBUILD_CFLAGS += $(call cc-option,-mno-prefixed)endififdef CONFIG_PPC_KERNEL_PCRELKBUILD_CFLAGS += $(call cc-option,-mpcrel)elseKBUILD_CFLAGS += $(call cc-option,-mno-pcrel)endif # No AltiVec or VSX or MMA instructions when building kernelKBUILD_CFLAGS += $(call cc-option,-mno-altivec)KBUILD_CFLAGS += $(call cc-option,-mno-vsx)KBUILD_CFLAGS += $(call cc-option,-mno-mma) # 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 itKBUILD_CFLAGS += -fno-asynchronous-unwind-tables # Never use string load/store instructions as they are# often slow when they are implemented at allKBUILD_CFLAGS += $(call cc-option,-mno-string) KBUILD_AFLAGS += $(aflags-y)KBUILD_CFLAGS += $(cflags-y) # Default to zImage, override when neededall: zImage # With make 3.82 we cannot mix normal and wildcard targetsBOOT_TARGETS1 := zImage zImage.initrd uImageBOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.% PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2) boot := arch/powerpc/boot $(BOOT_TARGETS1): vmlinux $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)$(BOOT_TARGETS2): vmlinux $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) PHONY += bootwrapper_installbootwrapper_install: $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) include $(srctree)/scripts/Makefile.defconf generated_configs += ppc64le_defconfigppc64le_defconfig: $(call merge_into_defconfig,ppc64_defconfig,le) generated_configs += ppc64le_guest_defconfigppc64le_guest_defconfig: $(call merge_into_defconfig,ppc64_defconfig,le guest kvm_guest) generated_configs += ppc64_guest_defconfigppc64_guest_defconfig: $(call merge_into_defconfig,ppc64_defconfig,be guest kvm_guest) generated_configs += pseries_le_defconfigpseries_le_defconfig: ppc64le_guest_defconfig generated_configs += pseries_defconfigpseries_defconfig: ppc64le_guest_defconfig generated_configs += powernv_be_defconfigpowernv_be_defconfig: $(call merge_into_defconfig,powernv_defconfig,be) generated_configs += mpc85xx_defconfigmpc85xx_defconfig: $(call merge_into_defconfig,mpc85xx_base.config,\ 85xx-32bit 85xx-hw fsl-emb-nonhw) generated_configs += mpc85xx_smp_defconfigmpc85xx_smp_defconfig: $(call merge_into_defconfig,mpc85xx_base.config,\ 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw) generated_configs += corenet32_smp_defconfigcorenet32_smp_defconfig: $(call merge_into_defconfig,corenet_base.config,\ 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa) generated_configs += corenet64_smp_defconfigcorenet64_smp_defconfig: $(call merge_into_defconfig,corenet_base.config,\ 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa) generated_configs += mpc86xx_defconfigmpc86xx_defconfig: $(call merge_into_defconfig,mpc86xx_base.config,\ 86xx-hw fsl-emb-nonhw) generated_configs += mpc86xx_smp_defconfigmpc86xx_smp_defconfig: $(call merge_into_defconfig,mpc86xx_base.config,\ 86xx-smp 86xx-hw fsl-emb-nonhw) generated_configs += ppc32_allmodconfigppc32_allmodconfig: $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \ -f $(srctree)/Makefile allmodconfig generated_configs += ppc44x_allmodconfigppc44x_allmodconfig: $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/44x.config \ -f $(srctree)/Makefile allmodconfig generated_configs += ppc8xx_allmodconfigppc8xx_allmodconfig: $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/8xx.config \ -f $(srctree)/Makefile allmodconfig generated_configs += ppc85xx_allmodconfigppc85xx_allmodconfig: $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-32bit.config \ -f $(srctree)/Makefile allmodconfig generated_configs += ppc_defconfigppc_defconfig: $(call merge_into_defconfig,book3s_32.config,) generated_configs += ppc64le_allmodconfigppc64le_allmodconfig: $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \ -f $(srctree)/Makefile allmodconfig generated_configs += ppc64le_allnoconfigppc64le_allnoconfig: $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/ppc64le.config \ -f $(srctree)/Makefile allnoconfig generated_configs += ppc64_book3e_allmodconfigppc64_book3e_allmodconfig: $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \ -f $(srctree)/Makefile allmodconfig generated_configs += ppc32_randconfigppc32_randconfig: $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/32-bit.config \ -f $(srctree)/Makefile randconfig generated_configs += ppc64_randconfigppc64_randconfig: $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/64-bit.config \ -f $(srctree)/Makefile randconfig PHONY += $(generated_configs) define archhelp echo '* zImage - Build default images selected by kernel config' echo ' zImage.* - Compressed kernel image (arch/powerpc/boot/zImage.*)' echo ' uImage - U-Boot native image format' echo ' cuImage.<dt> - Backwards compatible U-Boot image for older' echo ' versions which do not support device trees' echo ' dtbImage.<dt> - zImage with an embedded device tree blob' echo ' simpleImage.<dt> - Firmware independent image.' echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)' echo ' install - Install kernel using' echo ' (your) ~/bin/$(INSTALLKERNEL) or' echo ' (distribution) /sbin/$(INSTALLKERNEL) or' echo ' install to $$(INSTALL_PATH)' echo ' *_defconfig - Select default config from arch/powerpc/configs' echo '' echo ' Targets with <dt> embed a device tree blob inside the image' echo ' These targets support board with firmware that does not' echo ' support passing a device tree directly. Replace <dt> with the' echo ' name of a dts file from the arch/powerpc/boot/dts/ directory' echo ' (minus the .dts extension).' echo $(foreach cfg,$(generated_configs), printf " %-27s - Build for %s\\n" $(cfg) $(subst _defconfig,,$(cfg));)endef PHONY += installinstall: $(call cmd,install) ifeq ($(KBUILD_EXTMOD),)# We need to generate vdso-offsets.h before compiling certain files in kernel/.# In order to do that, we should use the archprepare target, but we can't since# asm-offsets.h is included in some files used to generate vdso-offsets.h, and# asm-offsets.h is built in prepare0, for which archprepare is a dependency.# Therefore we need to generate the header after prepare0 has been made, hence# this hack.prepare: vdso_preparevdso_prepare: prepare0 $(if $(CONFIG_VDSO32),$(Q)$(MAKE) \ $(build)=arch/powerpc/kernel/vdso include/generated/vdso32-offsets.h) $(if $(CONFIG_PPC64),$(Q)$(MAKE) \ $(build)=arch/powerpc/kernel/vdso include/generated/vdso64-offsets.h)endif archprepare: checkbin archheaders: $(Q)$(MAKE) $(build)=arch/powerpc/kernel/syscalls all ifdef CONFIG_STACKPROTECTORprepare: stack_protector_prepare PHONY += stack_protector_preparestack_protector_prepare: prepare0ifdef CONFIG_PPC64 $(eval KBUILD_CFLAGS += -mstack-protector-guard=tls -mstack-protector-guard-reg=r13 \ -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' \ $(objtree)/include/generated/asm-offsets.h))else $(eval KBUILD_CFLAGS += -mstack-protector-guard=tls -mstack-protector-guard-reg=r2 \ -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' \ $(objtree)/include/generated/asm-offsets.h))endifendif PHONY += checkbincheckbin: @if test "x${CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT}" = "xy" -a \ "x${CONFIG_LD_IS_BFD}" = "xy" -a \ "${CONFIG_LD_VERSION}" = "23700" ; then \ echo -n '*** binutils 2.37 drops unused section symbols, which recordmcount ' ; \ echo 'is unable to handle.' ; \ echo '*** Please use a different binutils version.' ; \ false ; \ fi
# This file is included by the global makefile so that you can add your own
# architecture-specific flags and dependencies.
#
# 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
#
ifdef cross_compiling
ifeq ($(CROSS_COMPILE),)
# Auto detect cross compiler prefix.
# Look for: (powerpc(64(le)?)?)(-unknown)?-linux(-gnu)?-
CC_ARCHES := powerpc powerpc64 powerpc64le
CC_SUFFIXES := linux linux-gnu unknown-linux-gnu
CROSS_COMPILE := $(call cc-cross-prefix, $(foreach a,$(CC_ARCHES), \
$(foreach s,$(CC_SUFFIXES),$(a)-$(s)-)))
endif
endif
HAS_BIARCH := $(call cc-option-yn, -m32)
# Set default 32 bits cross compilers for vdso and boot wrapper
CROSS32_COMPILE ?=
# If we're on a ppc/ppc64/ppc64le machine use that defconfig, otherwise just use
# ppc64le_defconfig because we have nothing better to go on.
uname := $(shell uname -m)
KBUILD_DEFCONFIG := $(if $(filter ppc%,$(uname)),$(uname),ppc64le)_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))
ifeq ($(CONFIG_PPC64)$(CONFIG_LD_IS_BFD),yy)
# 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 += $(objtree)/arch/powerpc/lib/crtsavres.o
endif
ifdef CONFIG_PPC64
KBUILD_RUSTFLAGS += --target=powerpc64le-unknown-linux-gnu
KBUILD_RUSTFLAGS += -Ctarget-feature=-mma,-vsx,-hard-float,-altivec
else
KBUILD_RUSTFLAGS += --target=powerpc-unknown-linux-gnu
endif
ifdef CONFIG_CPU_LITTLE_ENDIAN
KBUILD_CPPFLAGS += -mlittle-endian
KBUILD_LDFLAGS += -EL
LDEMULATION := lppc
GNUTARGET := powerpcle
MULTIPLEWORD := -mno-multiple
KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect)
else
KBUILD_CPPFLAGS += $(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_PPC64_ELF_ABI_V1) += $(call cc-option,-mabi=elfv1)
cflags-$(CONFIG_PPC64_ELF_ABI_V1) += $(call cc-option,-mcall-aixdesc)
aflags-$(CONFIG_PPC64_ELF_ABI_V1) += $(call cc-option,-mabi=elfv1)
aflags-$(CONFIG_PPC64_ELF_ABI_V2) += -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_CPPFLAGS += -m$(BITS)
KBUILD_AFLAGS += -m$(BITS)
KBUILD_LDFLAGS += -m elf$(BITS)$(LDEMULATION)
endif
LDFLAGS_vmlinux-y := -Bstatic
LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie --no-dynamic-linker
LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) += -z notext
LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y)
ifdef CONFIG_PPC64
ifndef CONFIG_PPC_KERNEL_PCREL
# -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
endif
endif
CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no)
ifdef CONFIG_PPC64_ELF_ABI_V2
CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc))
else
ifndef CONFIG_CC_IS_CLANG
CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc)
endif
endif
CFLAGS-$(CONFIG_PPC64) += -mcmodel=medium
CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions)
CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mlong-double-128)
# Clang unconditionally reserves r2 on ppc32 and does not support the flag
# https://llvm.org/pr39555
CFLAGS-$(CONFIG_PPC32) := $(call cc-option, -ffixed-r2)
# Clang doesn't support -mmultiple / -mno-multiple
# https://llvm.org/pr39556
CFLAGS-$(CONFIG_PPC32) += $(call cc-option, $(MULTIPLEWORD))
CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata)
CC_FLAGS_FPU := $(call cc-option,-mhard-float)
CC_FLAGS_NO_FPU := $(call cc-option,-msoft-float)
ifdef CONFIG_FUNCTION_TRACER
ifdef CONFIG_ARCH_USING_PATCHABLE_FUNCTION_ENTRY
KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY
ifdef CONFIG_PPC_FTRACE_OUT_OF_LINE
CC_FLAGS_FTRACE := -fpatchable-function-entry=1
else
ifdef CONFIG_DYNAMIC_FTRACE_WITH_CALL_OPS # PPC32 only
CC_FLAGS_FTRACE := -fpatchable-function-entry=3,1
else
CC_FLAGS_FTRACE := -fpatchable-function-entry=2
endif
endif
else
CC_FLAGS_FTRACE := -pg
ifdef CONFIG_MPROFILE_KERNEL
CC_FLAGS_FTRACE += -mprofile-kernel
endif
endif
endif
CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += -mcpu=$(CONFIG_TARGET_CPU)
AFLAGS-$(CONFIG_TARGET_CPU_BOOL) += -mcpu=$(CONFIG_TARGET_CPU)
CFLAGS-y += $(CONFIG_TUNE_CPU)
asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
KBUILD_CPPFLAGS += -I $(srctree)/arch/powerpc $(asinstr)
KBUILD_AFLAGS += $(AFLAGS-y)
KBUILD_CFLAGS += $(CC_FLAGS_NO_FPU)
KBUILD_CFLAGS += $(CFLAGS-y)
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 prefix or pcrel
ifdef CONFIG_PPC_KERNEL_PREFIXED
KBUILD_CFLAGS += $(call cc-option,-mprefixed)
else
KBUILD_CFLAGS += $(call cc-option,-mno-prefixed)
endif
ifdef CONFIG_PPC_KERNEL_PCREL
KBUILD_CFLAGS += $(call cc-option,-mpcrel)
else
KBUILD_CFLAGS += $(call cc-option,-mno-pcrel)
endif
# No AltiVec or VSX or MMA instructions when building kernel
KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
KBUILD_CFLAGS += $(call cc-option,-mno-mma)
# 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)
KBUILD_AFLAGS += $(aflags-y)
KBUILD_CFLAGS += $(cflags-y)
# 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/powerpc/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)/%,$@)
include $(srctree)/scripts/Makefile.defconf
generated_configs += ppc64le_defconfig
ppc64le_defconfig:
$(call merge_into_defconfig,ppc64_defconfig,le)
generated_configs += ppc64le_guest_defconfig
ppc64le_guest_defconfig:
$(call merge_into_defconfig,ppc64_defconfig,le guest kvm_guest)
generated_configs += ppc64_guest_defconfig
ppc64_guest_defconfig:
$(call merge_into_defconfig,ppc64_defconfig,be guest kvm_guest)
generated_configs += pseries_le_defconfig
pseries_le_defconfig: ppc64le_guest_defconfig
generated_configs += pseries_defconfig
pseries_defconfig: ppc64le_guest_defconfig
generated_configs += powernv_be_defconfig
powernv_be_defconfig:
$(call merge_into_defconfig,powernv_defconfig,be)
generated_configs += mpc85xx_defconfig
mpc85xx_defconfig:
$(call merge_into_defconfig,mpc85xx_base.config,\
85xx-32bit 85xx-hw fsl-emb-nonhw)
generated_configs += mpc85xx_smp_defconfig
mpc85xx_smp_defconfig:
$(call merge_into_defconfig,mpc85xx_base.config,\
85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)
generated_configs += corenet32_smp_defconfig
corenet32_smp_defconfig:
$(call merge_into_defconfig,corenet_base.config,\
85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa)
generated_configs += corenet64_smp_defconfig
corenet64_smp_defconfig:
$(call merge_into_defconfig,corenet_base.config,\
85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa)
generated_configs += mpc86xx_defconfig
mpc86xx_defconfig:
$(call merge_into_defconfig,mpc86xx_base.config,\
86xx-hw fsl-emb-nonhw)
generated_configs += mpc86xx_smp_defconfig
mpc86xx_smp_defconfig:
$(call merge_into_defconfig,mpc86xx_base.config,\
86xx-smp 86xx-hw fsl-emb-nonhw)
generated_configs += ppc32_allmodconfig
ppc32_allmodconfig:
$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \
-f $(srctree)/Makefile allmodconfig
generated_configs += ppc44x_allmodconfig
ppc44x_allmodconfig:
$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/44x.config \
-f $(srctree)/Makefile allmodconfig
generated_configs += ppc8xx_allmodconfig
ppc8xx_allmodconfig:
$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/8xx.config \
-f $(srctree)/Makefile allmodconfig
generated_configs += ppc85xx_allmodconfig
ppc85xx_allmodconfig:
$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-32bit.config \
-f $(srctree)/Makefile allmodconfig
generated_configs += ppc_defconfig
ppc_defconfig:
$(call merge_into_defconfig,book3s_32.config,)
generated_configs += ppc64le_allmodconfig
ppc64le_allmodconfig:
$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \
-f $(srctree)/Makefile allmodconfig
generated_configs += ppc64le_allnoconfig
ppc64le_allnoconfig:
$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/ppc64le.config \
-f $(srctree)/Makefile allnoconfig
generated_configs += ppc64_book3e_allmodconfig
ppc64_book3e_allmodconfig:
$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \
-f $(srctree)/Makefile allmodconfig
generated_configs += ppc32_randconfig
ppc32_randconfig:
$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/32-bit.config \
-f $(srctree)/Makefile randconfig
generated_configs += ppc64_randconfig
ppc64_randconfig:
$(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/64-bit.config \
-f $(srctree)/Makefile randconfig
PHONY += $(generated_configs)
define archhelp
echo '* zImage - Build default images selected by kernel config'
echo ' zImage.* - Compressed kernel image (arch/powerpc/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)'
echo ' *_defconfig - Select default config from arch/powerpc/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/powerpc/boot/dts/ directory'
echo ' (minus the .dts extension).'
echo
$(foreach cfg,$(generated_configs),
printf " %-27s - Build for %s\\n" $(cfg) $(subst _defconfig,,$(cfg));)
endef
PHONY += install
install:
$(call cmd,install)
ifeq ($(KBUILD_EXTMOD),)
# We need to generate vdso-offsets.h before compiling certain files in kernel/.
# In order to do that, we should use the archprepare target, but we can't since
# asm-offsets.h is included in some files used to generate vdso-offsets.h, and
# asm-offsets.h is built in prepare0, for which archprepare is a dependency.
# Therefore we need to generate the header after prepare0 has been made, hence
# this hack.
prepare: vdso_prepare
vdso_prepare: prepare0
$(if $(CONFIG_VDSO32),$(Q)$(MAKE) \
$(build)=arch/powerpc/kernel/vdso include/generated/vdso32-offsets.h)
$(if $(CONFIG_PPC64),$(Q)$(MAKE) \
$(build)=arch/powerpc/kernel/vdso include/generated/vdso64-offsets.h)
endif
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
$(eval KBUILD_CFLAGS += -mstack-protector-guard=tls -mstack-protector-guard-reg=r13 \
-mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' \
$(objtree)/include/generated/asm-offsets.h))
else
$(eval KBUILD_CFLAGS += -mstack-protector-guard=tls -mstack-protector-guard-reg=r2 \
-mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' \
$(objtree)/include/generated/asm-offsets.h))
endif
endif
PHONY += checkbin
checkbin:
@if test "x${CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT}" = "xy" -a \
"x${CONFIG_LD_IS_BFD}" = "xy" -a \
"${CONFIG_LD_VERSION}" = "23700" ; then \
echo -n '*** binutils 2.37 drops unused section symbols, which recordmcount ' ; \
echo 'is unable to handle.' ; \
echo '*** Please use a different binutils version.' ; \
false ; \
fi