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# 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 += arch/powerpc/lib/crtsavres.o 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 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 vmlinux.strip 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