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Diffstat (limited to 'arch/powerpc/Makefile')
| -rw-r--r-- | arch/powerpc/Makefile | 407 |
1 files changed, 407 insertions, 0 deletions
diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile new file mode 100644 index 000000000..f19dbaa1d --- /dev/null +++ b/arch/powerpc/Makefile @@ -0,0 +1,407 @@ +# 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 +# + +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 +# 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)) + +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_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_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 ($(HAS_BIARCH),y) +KBUILD_CFLAGS += -m$(BITS) +KBUILD_AFLAGS += -m$(BITS) +KBUILD_LDFLAGS += -m elf$(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-$(CONFIG_RELOCATABLE) := -pie +LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) += -z notext +LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y) + +ifdef CONFIG_PPC64 +ifndef CONFIG_PPC_KERNEL_PCREL +ifeq ($(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 +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) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc)) +CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions) +CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mlong-double-128) + +# Clang unconditionally reserves r2 on ppc32 and does not support the flag +# https://bugs.llvm.org/show_bug.cgi?id=39555 +CFLAGS-$(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) += $(call cc-option,-mno-readonly-in-sdata) + +ifdef CONFIG_FUNCTION_TRACER +ifdef CONFIG_ARCH_USING_PATCHABLE_FUNCTION_ENTRY +KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY +CC_FLAGS_FTRACE := -fpatchable-function-entry=2 +else +CC_FLAGS_FTRACE := -pg +ifdef CONFIG_MPROFILE_KERNEL +CC_FLAGS_FTRACE += -mprofile-kernel +endif +endif +endif + +CFLAGS-$(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 $(srctree)/arch/$(ARCH) $(asinstr) +KBUILD_AFLAGS += $(AFLAGS-y) +KBUILD_CFLAGS += $(call cc-option,-msoft-float) +KBUILD_CFLAGS += $(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 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 += $(call cc-option,-mno-string) + +cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec) + +# 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. +# LLVM IAS doesn't understand either flag: https://github.com/ClangBuiltLinux/linux/issues/675 +# but LLVM IAS only supports ISA >= 2.06 for Book3S 64 anyway... +cpu-as-$(CONFIG_PPC_BOOK3S_64) += $(call as-option,-Wa$(comma)-mpower4) $(call as-option,-Wa$(comma)-many) + +KBUILD_AFLAGS += $(cpu-as-y) +KBUILD_CFLAGS += $(cpu-as-y) + +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) $(BOOT_TARGETS2) + +boot := arch/$(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)/%,$@) + +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 += 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 += $(generated_configs) + +define archhelp + echo '* zImage - Build default images selected by kernel config' + echo ' zImage.* - Compressed kernel image (arch/$(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 $$(INSTALL_PATH) and run lilo' + echo ' *_defconfig - Select default config from arch/$(ARCH)/configs' + echo '' + echo ' Targets with <dt> embed a device tree blob inside the image' + echo ' These targets support board with firmware that does not' + echo ' support passing a device tree directly. Replace <dt> with the' + echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory' + echo ' (minus the .dts extension).' + echo + $(foreach cfg,$(generated_configs), + printf " %-27s - Build for %s\\n" $(cfg) $(subst _defconfig,,$(cfg));) +endef + +PHONY += install +install: + $(call cmd,install) + +ifeq ($(KBUILD_EXTMOD),) +# We need to generate vdso-offsets.h before compiling certain files in kernel/. +# In order to do that, we should use the archprepare target, but we can't since +# asm-offsets.h is included in some files used to generate vdso-offsets.h, and +# asm-offsets.h is built in prepare0, for which archprepare is a dependency. +# Therefore we need to generate the header after prepare0 has been made, hence +# this hack. +prepare: vdso_prepare +vdso_prepare: prepare0 + $(if $(CONFIG_VDSO32),$(Q)$(MAKE) \ + $(build)=arch/powerpc/kernel/vdso include/generated/vdso32-offsets.h) + $(if $(CONFIG_PPC64),$(Q)$(MAKE) \ + $(build)=arch/powerpc/kernel/vdso include/generated/vdso64-offsets.h) +endif + +archprepare: checkbin + +archheaders: + $(Q)$(MAKE) $(build)=arch/powerpc/kernel/syscalls all + +ifdef CONFIG_STACKPROTECTOR +prepare: stack_protector_prepare + +PHONY += stack_protector_prepare +stack_protector_prepare: prepare0 +ifdef CONFIG_PPC64 + $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$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 + +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 |