linux/arch/powerpc/Makefile
<<
>>
Prefs
   1# This file is included by the global makefile so that you can add your own
   2# architecture-specific flags and dependencies. Remember to do have actions
   3# for "archclean" and "archdep" for cleaning up and making dependencies for
   4# this architecture.
   5#
   6# This file is subject to the terms and conditions of the GNU General Public
   7# License.  See the file "COPYING" in the main directory of this archive
   8# for more details.
   9#
  10# Copyright (C) 1994 by Linus Torvalds
  11# Changes for PPC by Gary Thomas
  12# Rewritten by Cort Dougan and Paul Mackerras
  13#
  14
  15HAS_BIARCH      := $(call cc-option-yn, -m32)
  16
  17# Set default 32 bits cross compilers for vdso and boot wrapper
  18CROSS32_COMPILE ?=
  19
  20ifeq ($(HAS_BIARCH),y)
  21ifeq ($(CROSS32_COMPILE),)
  22ifdef CONFIG_PPC32
  23# These options will be overridden by any -mcpu option that the CPU
  24# or platform code sets later on the command line, but they are needed
  25# to set a sane 32-bit cpu target for the 64-bit cross compiler which
  26# may default to the wrong ISA.
  27KBUILD_CFLAGS           += -mcpu=powerpc
  28KBUILD_AFLAGS           += -mcpu=powerpc
  29endif
  30endif
  31endif
  32
  33ifdef CONFIG_PPC_BOOK3S_32
  34KBUILD_CFLAGS           += -mcpu=powerpc
  35endif
  36
  37# If we're on a ppc/ppc64/ppc64le machine use that defconfig, otherwise just use
  38# ppc64_defconfig because we have nothing better to go on.
  39uname := $(shell uname -m)
  40KBUILD_DEFCONFIG := $(if $(filter ppc%,$(uname)),$(uname),ppc64)_defconfig
  41
  42new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
  43
  44ifeq ($(new_nm),y)
  45NM              := $(NM) --synthetic
  46endif
  47
  48# BITS is used as extension for files which are available in a 32 bit
  49# and a 64 bit version to simplify shared Makefiles.
  50# e.g.: obj-y += foo_$(BITS).o
  51export BITS
  52
  53ifdef CONFIG_PPC64
  54        BITS := 64
  55else
  56        BITS := 32
  57endif
  58
  59machine-y = ppc
  60machine-$(CONFIG_PPC64) += 64
  61machine-$(CONFIG_CPU_LITTLE_ENDIAN) += le
  62UTS_MACHINE := $(subst $(space),,$(machine-y))
  63
  64# XXX This needs to be before we override LD below
  65ifdef CONFIG_PPC32
  66KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
  67else
  68ifeq ($(call ld-ifversion, -ge, 22500, y),y)
  69# Have the linker provide sfpr if possible.
  70# There is a corresponding test in arch/powerpc/lib/Makefile
  71KBUILD_LDFLAGS_MODULE += --save-restore-funcs
  72else
  73KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
  74endif
  75endif
  76
  77ifdef CONFIG_CPU_LITTLE_ENDIAN
  78KBUILD_CFLAGS   += -mlittle-endian
  79KBUILD_LDFLAGS  += -EL
  80LDEMULATION     := lppc
  81GNUTARGET       := powerpcle
  82MULTIPLEWORD    := -mno-multiple
  83KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect)
  84else
  85KBUILD_CFLAGS += $(call cc-option,-mbig-endian)
  86KBUILD_LDFLAGS  += -EB
  87LDEMULATION     := ppc
  88GNUTARGET       := powerpc
  89MULTIPLEWORD    := -mmultiple
  90endif
  91
  92ifdef CONFIG_PPC64
  93ifndef CONFIG_CC_IS_CLANG
  94cflags-$(CONFIG_CPU_BIG_ENDIAN)         += $(call cc-option,-mabi=elfv1)
  95cflags-$(CONFIG_CPU_BIG_ENDIAN)         += $(call cc-option,-mcall-aixdesc)
  96aflags-$(CONFIG_CPU_BIG_ENDIAN)         += $(call cc-option,-mabi=elfv1)
  97aflags-$(CONFIG_CPU_LITTLE_ENDIAN)      += -mabi=elfv2
  98endif
  99endif
 100
 101ifndef CONFIG_CC_IS_CLANG
 102  cflags-$(CONFIG_CPU_LITTLE_ENDIAN)    += -mno-strict-align
 103endif
 104
 105cflags-$(CONFIG_CPU_BIG_ENDIAN)         += $(call cc-option,-mbig-endian)
 106cflags-$(CONFIG_CPU_LITTLE_ENDIAN)      += -mlittle-endian
 107aflags-$(CONFIG_CPU_BIG_ENDIAN)         += $(call cc-option,-mbig-endian)
 108aflags-$(CONFIG_CPU_LITTLE_ENDIAN)      += -mlittle-endian
 109
 110ifeq ($(HAS_BIARCH),y)
 111KBUILD_CFLAGS   += -m$(BITS)
 112KBUILD_AFLAGS   += -m$(BITS) -Wl,-a$(BITS)
 113KBUILD_LDFLAGS  += -m elf$(BITS)$(LDEMULATION)
 114endif
 115
 116cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard=tls
 117ifdef CONFIG_PPC64
 118cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r13
 119else
 120cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r2
 121endif
 122
 123LDFLAGS_vmlinux-y := -Bstatic
 124LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
 125LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y)
 126
 127ifdef CONFIG_PPC64
 128ifeq ($(call cc-option-yn,-mcmodel=medium),y)
 129        # -mcmodel=medium breaks modules because it uses 32bit offsets from
 130        # the TOC pointer to create pointers where possible. Pointers into the
 131        # percpu data area are created by this method.
 132        #
 133        # The kernel module loader relocates the percpu data section from the
 134        # original location (starting with 0xd...) to somewhere in the base
 135        # kernel percpu data space (starting with 0xc...). We need a full
 136        # 64bit relocation for this to work, hence -mcmodel=large.
 137        KBUILD_CFLAGS_MODULE += -mcmodel=large
 138else
 139        export NO_MINIMAL_TOC := -mno-minimal-toc
 140endif
 141endif
 142
 143CFLAGS-$(CONFIG_PPC64)  := $(call cc-option,-mtraceback=no)
 144ifndef CONFIG_CC_IS_CLANG
 145ifdef CONFIG_CPU_LITTLE_ENDIAN
 146CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc))
 147AFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mabi=elfv2)
 148else
 149CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mabi=elfv1)
 150CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mcall-aixdesc)
 151AFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mabi=elfv1)
 152endif
 153endif
 154CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc))
 155CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mno-pointers-to-nested-functions)
 156
 157# Clang unconditionally reserves r2 on ppc32 and does not support the flag
 158# https://bugs.llvm.org/show_bug.cgi?id=39555
 159CFLAGS-$(CONFIG_PPC32)  := $(call cc-option, -ffixed-r2)
 160
 161# Clang doesn't support -mmultiple / -mno-multiple
 162# https://bugs.llvm.org/show_bug.cgi?id=39556
 163CFLAGS-$(CONFIG_PPC32)  += $(call cc-option, $(MULTIPLEWORD))
 164
 165CFLAGS-$(CONFIG_PPC32)  += $(call cc-option,-mno-readonly-in-sdata)
 166
 167ifdef CONFIG_PPC_BOOK3S_64
 168ifdef CONFIG_CPU_LITTLE_ENDIAN
 169CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8
 170CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power9,-mtune=power8)
 171else
 172CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5))
 173CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mcpu=power5,-mcpu=power4)
 174endif
 175else
 176CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
 177endif
 178
 179ifdef CONFIG_FUNCTION_TRACER
 180CC_FLAGS_FTRACE := -pg
 181ifdef CONFIG_MPROFILE_KERNEL
 182CC_FLAGS_FTRACE += -mprofile-kernel
 183endif
 184endif
 185
 186CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU))
 187
 188# Altivec option not allowed with e500mc64 in GCC.
 189ifdef CONFIG_ALTIVEC
 190E5500_CPU := -mcpu=powerpc64
 191else
 192E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
 193endif
 194CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU)
 195CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
 196
 197ifdef CONFIG_PPC32
 198ifdef CONFIG_PPC_E500MC
 199CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc)
 200else
 201CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc)
 202endif
 203endif
 204
 205asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
 206
 207KBUILD_CPPFLAGS += -I $(srctree)/arch/$(ARCH) $(asinstr)
 208KBUILD_AFLAGS   += $(AFLAGS-y)
 209KBUILD_CFLAGS   += $(call cc-option,-msoft-float)
 210KBUILD_CFLAGS   += -pipe $(CFLAGS-y)
 211CPP             = $(CC) -E $(KBUILD_CFLAGS)
 212
 213CHECKFLAGS      += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__
 214ifdef CONFIG_CPU_BIG_ENDIAN
 215CHECKFLAGS      += -D__BIG_ENDIAN__
 216else
 217CHECKFLAGS      += -D__LITTLE_ENDIAN__
 218endif
 219
 220ifdef CONFIG_476FPE_ERR46
 221        KBUILD_LDFLAGS_MODULE += --ppc476-workaround \
 222                -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds
 223endif
 224
 225# No AltiVec or VSX instructions when building kernel
 226KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
 227KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
 228
 229# No SPE instruction when building kernel
 230# (We use all available options to help semi-broken compilers)
 231KBUILD_CFLAGS += $(call cc-option,-mno-spe)
 232KBUILD_CFLAGS += $(call cc-option,-mspe=no)
 233
 234# Don't emit .eh_frame since we have no use for it
 235KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
 236
 237# Never use string load/store instructions as they are
 238# often slow when they are implemented at all
 239KBUILD_CFLAGS           += $(call cc-option,-mno-string)
 240
 241cpu-as-$(CONFIG_40x)            += -Wa,-m405
 242cpu-as-$(CONFIG_44x)            += -Wa,-m440
 243cpu-as-$(CONFIG_ALTIVEC)        += $(call as-option,-Wa$(comma)-maltivec)
 244cpu-as-$(CONFIG_E500)           += -Wa,-me500
 245
 246# When using '-many -mpower4' gas will first try and find a matching power4
 247# mnemonic and failing that it will allow any valid mnemonic that GAS knows
 248# about. GCC will pass -many to GAS when assembling, clang does not.
 249cpu-as-$(CONFIG_PPC_BOOK3S_64)  += -Wa,-mpower4 -Wa,-many
 250cpu-as-$(CONFIG_PPC_E500MC)     += $(call as-option,-Wa$(comma)-me500mc)
 251
 252KBUILD_AFLAGS += $(cpu-as-y)
 253KBUILD_CFLAGS += $(cpu-as-y)
 254
 255KBUILD_AFLAGS += $(aflags-y)
 256KBUILD_CFLAGS += $(cflags-y)
 257
 258head-$(CONFIG_PPC64)            := arch/powerpc/kernel/head_64.o
 259head-$(CONFIG_PPC_BOOK3S_32)    := arch/powerpc/kernel/head_book3s_32.o
 260head-$(CONFIG_PPC_8xx)          := arch/powerpc/kernel/head_8xx.o
 261head-$(CONFIG_40x)              := arch/powerpc/kernel/head_40x.o
 262head-$(CONFIG_44x)              := arch/powerpc/kernel/head_44x.o
 263head-$(CONFIG_FSL_BOOKE)        := arch/powerpc/kernel/head_fsl_booke.o
 264
 265head-$(CONFIG_PPC64)            += arch/powerpc/kernel/entry_64.o
 266head-$(CONFIG_PPC_FPU)          += arch/powerpc/kernel/fpu.o
 267head-$(CONFIG_ALTIVEC)          += arch/powerpc/kernel/vector.o
 268head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE)  += arch/powerpc/kernel/prom_init.o
 269
 270# Default to zImage, override when needed
 271all: zImage
 272
 273# With make 3.82 we cannot mix normal and wildcard targets
 274BOOT_TARGETS1 := zImage zImage.initrd uImage
 275BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
 276
 277PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
 278
 279boot := arch/$(ARCH)/boot
 280
 281$(BOOT_TARGETS1): vmlinux
 282        $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 283$(BOOT_TARGETS2): vmlinux
 284        $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 285
 286
 287PHONY += bootwrapper_install
 288bootwrapper_install:
 289        $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 290
 291# Used to create 'merged defconfigs'
 292# To use it $(call) it with the first argument as the base defconfig
 293# and the second argument as a space separated list of .config files to merge,
 294# without the .config suffix.
 295define merge_into_defconfig
 296        $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
 297                -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \
 298                $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config)
 299        +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
 300endef
 301
 302PHONY += pseries_le_defconfig
 303pseries_le_defconfig:
 304        $(call merge_into_defconfig,pseries_defconfig,le)
 305
 306PHONY += ppc64le_defconfig
 307ppc64le_defconfig:
 308        $(call merge_into_defconfig,ppc64_defconfig,le)
 309
 310PHONY += ppc64le_guest_defconfig
 311ppc64le_guest_defconfig:
 312        $(call merge_into_defconfig,ppc64_defconfig,le guest)
 313
 314PHONY += ppc64_guest_defconfig
 315ppc64_guest_defconfig:
 316        $(call merge_into_defconfig,ppc64_defconfig,be guest)
 317
 318PHONY += powernv_be_defconfig
 319powernv_be_defconfig:
 320        $(call merge_into_defconfig,powernv_defconfig,be)
 321
 322PHONY += mpc85xx_defconfig
 323mpc85xx_defconfig:
 324        $(call merge_into_defconfig,mpc85xx_base.config,\
 325                85xx-32bit 85xx-hw fsl-emb-nonhw)
 326
 327PHONY += mpc85xx_smp_defconfig
 328mpc85xx_smp_defconfig:
 329        $(call merge_into_defconfig,mpc85xx_base.config,\
 330                85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)
 331
 332PHONY += corenet32_smp_defconfig
 333corenet32_smp_defconfig:
 334        $(call merge_into_defconfig,corenet_base.config,\
 335                85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa)
 336
 337PHONY += corenet64_smp_defconfig
 338corenet64_smp_defconfig:
 339        $(call merge_into_defconfig,corenet_base.config,\
 340                85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa)
 341
 342PHONY += mpc86xx_defconfig
 343mpc86xx_defconfig:
 344        $(call merge_into_defconfig,mpc86xx_base.config,\
 345                86xx-hw fsl-emb-nonhw)
 346
 347PHONY += mpc86xx_smp_defconfig
 348mpc86xx_smp_defconfig:
 349        $(call merge_into_defconfig,mpc86xx_base.config,\
 350                86xx-smp 86xx-hw fsl-emb-nonhw)
 351
 352PHONY += ppc32_allmodconfig
 353ppc32_allmodconfig:
 354        $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \
 355                -f $(srctree)/Makefile allmodconfig
 356
 357PHONY += ppc_defconfig
 358ppc_defconfig:
 359        $(call merge_into_defconfig,book3s_32.config,)
 360
 361PHONY += ppc64le_allmodconfig
 362ppc64le_allmodconfig:
 363        $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \
 364                -f $(srctree)/Makefile allmodconfig
 365
 366PHONY += ppc64le_allnoconfig
 367ppc64le_allnoconfig:
 368        $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/ppc64le.config \
 369                -f $(srctree)/Makefile allnoconfig
 370
 371PHONY += ppc64_book3e_allmodconfig
 372ppc64_book3e_allmodconfig:
 373        $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \
 374                -f $(srctree)/Makefile allmodconfig
 375
 376PHONY += ppc32_randconfig
 377ppc32_randconfig:
 378        $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/32-bit.config \
 379                -f $(srctree)/Makefile randconfig
 380
 381PHONY += ppc64_randconfig
 382ppc64_randconfig:
 383        $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/64-bit.config \
 384                -f $(srctree)/Makefile randconfig
 385
 386define archhelp
 387  @echo '* zImage          - Build default images selected by kernel config'
 388  @echo '  zImage.*        - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
 389  @echo '  uImage          - U-Boot native image format'
 390  @echo '  cuImage.<dt>    - Backwards compatible U-Boot image for older'
 391  @echo '                    versions which do not support device trees'
 392  @echo '  dtbImage.<dt>   - zImage with an embedded device tree blob'
 393  @echo '  simpleImage.<dt> - Firmware independent image.'
 394  @echo '  treeImage.<dt>  - Support for older IBM 4xx firmware (not U-Boot)'
 395  @echo '  install         - Install kernel using'
 396  @echo '                    (your) ~/bin/$(INSTALLKERNEL) or'
 397  @echo '                    (distribution) /sbin/$(INSTALLKERNEL) or'
 398  @echo '                    install to $$(INSTALL_PATH) and run lilo'
 399  @echo '  *_defconfig     - Select default config from arch/$(ARCH)/configs'
 400  @echo ''
 401  @echo '  Targets with <dt> embed a device tree blob inside the image'
 402  @echo '  These targets support board with firmware that does not'
 403  @echo '  support passing a device tree directly.  Replace <dt> with the'
 404  @echo '  name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
 405  @echo '  (minus the .dts extension).'
 406endef
 407
 408PHONY += install
 409install:
 410        $(Q)$(MAKE) $(build)=$(boot) install
 411
 412archclean:
 413        $(Q)$(MAKE) $(clean)=$(boot)
 414
 415ifeq ($(KBUILD_EXTMOD),)
 416# We need to generate vdso-offsets.h before compiling certain files in kernel/.
 417# In order to do that, we should use the archprepare target, but we can't since
 418# asm-offsets.h is included in some files used to generate vdso-offsets.h, and
 419# asm-offsets.h is built in prepare0, for which archprepare is a dependency.
 420# Therefore we need to generate the header after prepare0 has been made, hence
 421# this hack.
 422prepare: vdso_prepare
 423vdso_prepare: prepare0
 424        $(if $(CONFIG_VDSO32),$(Q)$(MAKE) \
 425                $(build)=arch/powerpc/kernel/vdso32 include/generated/vdso32-offsets.h)
 426        $(if $(CONFIG_PPC64),$(Q)$(MAKE) \
 427                $(build)=arch/powerpc/kernel/vdso64 include/generated/vdso64-offsets.h)
 428endif
 429
 430archprepare: checkbin
 431
 432archheaders:
 433        $(Q)$(MAKE) $(build)=arch/powerpc/kernel/syscalls all
 434
 435ifdef CONFIG_STACKPROTECTOR
 436prepare: stack_protector_prepare
 437
 438PHONY += stack_protector_prepare
 439stack_protector_prepare: prepare0
 440ifdef CONFIG_PPC64
 441        $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' include/generated/asm-offsets.h))
 442else
 443        $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' include/generated/asm-offsets.h))
 444endif
 445endif
 446
 447ifdef CONFIG_SMP
 448ifdef CONFIG_PPC32
 449prepare: task_cpu_prepare
 450
 451PHONY += task_cpu_prepare
 452task_cpu_prepare: prepare0
 453        $(eval KBUILD_CFLAGS += -D_TASK_CPU=$(shell awk '{if ($$2 == "TASK_CPU") print $$3;}' include/generated/asm-offsets.h))
 454
 455endif # CONFIG_PPC32
 456endif # CONFIG_SMP
 457
 458PHONY += checkbin
 459# Check toolchain versions:
 460# - gcc-4.6 is the minimum kernel-wide version so nothing required.
 461checkbin:
 462        @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \
 463            && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \
 464                echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \
 465                echo 'in some circumstances.' ; \
 466                echo -n '*** Please use a different binutils version.' ; \
 467                false ; \
 468        fi
 469