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Diffstat (limited to 'arch/powerpc/Makefile')
| -rw-r--r-- | arch/powerpc/Makefile | 439 |
1 files changed, 439 insertions, 0 deletions
diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile new file mode 100644 index 000000000..912e64ab5 --- /dev/null +++ b/arch/powerpc/Makefile @@ -0,0 +1,439 @@ +# 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 ?= + +# 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$(BITS) +KBUILD_LDFLAGS += -m elf$(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-$(CONFIG_GENERIC_CPU) += -mcpu=power4 +endif +else ifdef CONFIG_PPC_BOOK3E_64 +CFLAGS-$(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)) +AFLAGS-$(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)) + +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 + @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 |