Merge tag 'v4.20' into for-linus

[mirror_ubuntu-hirsute-kernel.git] / arch / powerpc / Makefile

# 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

ifeq ($(CROSS_COMPILE),)
KBUILD_DEFCONFIG := $(shell uname -m)_defconfig
else
KBUILD_DEFCONFIG := ppc64_defconfig
endif

ifdef CONFIG_PPC64
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
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
KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/powerpc/kernel/module.lds
ifeq ($(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
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

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)
KBUILD_ARFLAGS  += --target=elf$(BITS)-$(GNUTARGET)
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)
LDFLAGS_vmlinux += $(call ld-option,--orphan-handling=warn)

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)  := $(call cc-option,-mtraceback=no)
ifdef CONFIG_CPU_LITTLE_ENDIAN
CFLAGS-$(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)  += $(call cc-option,-mabi=elfv1)
endif
CFLAGS-$(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_PPC32)  := -ffixed-r2 $(MULTIPLEWORD)
CFLAGS-$(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) += $(call cc-option,-mcpu=power5,-mcpu=power4)
endif
else
CFLAGS-$(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 += -Iarch/$(ARCH) $(asinstr)
KBUILD_AFLAGS   += -Iarch/$(ARCH) $(AFLAGS-y)
KBUILD_CFLAGS   += $(call cc-option,-msoft-float)
KBUILD_CFLAGS   += -pipe -Iarch/$(ARCH) $(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)

# Enable unit-at-a-time mode when possible. It shrinks the
# kernel considerably.
KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)

# FIXME: the module load should be taught about the additional relocs
# generated by this.
# revert to pre-gcc-4.4 behaviour of .eh_frame
KBUILD_CFLAGS   += $(call cc-option,-fno-dwarf2-cfi-asm)

# Never use string load/store instructions as they are
# often slow when they are implemented at all
KBUILD_CFLAGS           += $(call cc-option,-mno-string)

ifdef CONFIG_6xx
KBUILD_CFLAGS           += -mcpu=powerpc
endif

cpu-as-$(CONFIG_4xx)            += -Wa,-m405
cpu-as-$(CONFIG_ALTIVEC)        += $(call as-option,-Wa$(comma)-maltivec)
cpu-as-$(CONFIG_E200)           += -Wa,-me200
cpu-as-$(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-y                          := arch/powerpc/kernel/head_$(BITS).o
head-$(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)/%,$@)


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 += powernv_be_defconfig
powernv_be_defconfig:
        $(call merge_into_defconfig,powernv_defconfig,be)

PHONY += mpc85xx_defconfig
mpc85xx_defconfig:
        $(call merge_into_defconfig,mpc85xx_basic_defconfig,\
                85xx-32bit 85xx-hw fsl-emb-nonhw)

PHONY += mpc85xx_smp_defconfig
mpc85xx_smp_defconfig:
        $(call merge_into_defconfig,mpc85xx_basic_defconfig,\
                85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)

PHONY += corenet32_smp_defconfig
corenet32_smp_defconfig:
        $(call merge_into_defconfig,corenet_basic_defconfig,\
                85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa)

PHONY += corenet64_smp_defconfig
corenet64_smp_defconfig:
        $(call merge_into_defconfig,corenet_basic_defconfig,\
                85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa)

PHONY += mpc86xx_defconfig
mpc86xx_defconfig:
        $(call merge_into_defconfig,mpc86xx_basic_defconfig,\
                86xx-hw fsl-emb-nonhw)

PHONY += mpc86xx_smp_defconfig
mpc86xx_smp_defconfig:
        $(call merge_into_defconfig,mpc86xx_basic_defconfig,\
                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 += 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

install:
        $(Q)$(MAKE) $(build)=$(boot) install

vdso_install:
ifdef CONFIG_PPC64
        $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
endif
        $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@

archclean:
        $(Q)$(MAKE) $(clean)=$(boot)

archprepare: checkbin

ifdef CONFIG_STACKPROTECTOR
prepare: 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

# 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