arch/powerpc/Makefile

   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
  15 HAS_BIARCH      := $(call cc-option-yn, -m32)
  16
  17 # Set default 32 bits cross compilers for vdso and boot wrapper
  18 CROSS32_COMPILE ?=
  19
  20 ifeq ($(HAS_BIARCH),y)
  21 ifeq ($(CROSS32_COMPILE),)
  22 ifdef 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.
  27 KBUILD_CFLAGS           += -mcpu=powerpc
  28 KBUILD_AFLAGS           += -mcpu=powerpc
  29 endif
  30 endif
  31 endif
  32
  33 ifdef CONFIG_PPC_BOOK3S_32
  34 KBUILD_CFLAGS           += -mcpu=powerpc
  35 endif
  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.
  39 uname := $(shell uname -m)
  40 KBUILD_DEFCONFIG := $(if $(filter ppc%,$(uname)),$(uname),ppc64)_defconfig
  41
  42 ifdef CONFIG_PPC64
  43 new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
  44
  45 ifeq ($(new_nm),y)
  46 NM              := $(NM) --synthetic
  47 endif
  48 endif
  49
  50 # BITS is used as extension for files which are available in a 32 bit
  51 # and a 64 bit version to simplify shared Makefiles.
  52 # e.g.: obj-y += foo_$(BITS).o
  53 export BITS
  54
  55 ifdef CONFIG_PPC64
  56         BITS := 64
  57 else
  58         BITS := 32
  59 endif
  60
  61 machine-y = ppc
  62 machine-$(CONFIG_PPC64) += 64
  63 machine-$(CONFIG_CPU_LITTLE_ENDIAN) += le
  64 UTS_MACHINE := $(subst $(space),,$(machine-y))
  65
  66 # XXX This needs to be before we override LD below
  67 ifdef CONFIG_PPC32
  68 KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
  69 else
  70 KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/powerpc/kernel/module.lds
  71 ifeq ($(call ld-ifversion, -ge, 225000000, y),y)
  72 # Have the linker provide sfpr if possible.
  73 # There is a corresponding test in arch/powerpc/lib/Makefile
  74 KBUILD_LDFLAGS_MODULE += --save-restore-funcs
  75 else
  76 KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
  77 endif
  78 endif
  79
  80 ifdef CONFIG_CPU_LITTLE_ENDIAN
  81 KBUILD_CFLAGS   += -mlittle-endian
  82 KBUILD_LDFLAGS  += -EL
  83 LDEMULATION     := lppc
  84 GNUTARGET       := powerpcle
  85 MULTIPLEWORD    := -mno-multiple
  86 KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect)
  87 else
  88 KBUILD_CFLAGS += $(call cc-option,-mbig-endian)
  89 KBUILD_LDFLAGS  += -EB
  90 LDEMULATION     := ppc
  91 GNUTARGET       := powerpc
  92 MULTIPLEWORD    := -mmultiple
  93 endif
  94
  95 ifdef CONFIG_PPC64
  96 cflags-$(CONFIG_CPU_BIG_ENDIAN)         += $(call cc-option,-mabi=elfv1)
  97 cflags-$(CONFIG_CPU_BIG_ENDIAN)         += $(call cc-option,-mcall-aixdesc)
  98 aflags-$(CONFIG_CPU_BIG_ENDIAN)         += $(call cc-option,-mabi=elfv1)
  99 aflags-$(CONFIG_CPU_LITTLE_ENDIAN)      += -mabi=elfv2
 100 endif
 101
 102 ifndef CONFIG_CC_IS_CLANG
 103   cflags-$(CONFIG_CPU_LITTLE_ENDIAN)    += -mno-strict-align
 104 endif
 105
 106 cflags-$(CONFIG_CPU_BIG_ENDIAN)         += $(call cc-option,-mbig-endian)
 107 cflags-$(CONFIG_CPU_LITTLE_ENDIAN)      += -mlittle-endian
 108 aflags-$(CONFIG_CPU_BIG_ENDIAN)         += $(call cc-option,-mbig-endian)
 109 aflags-$(CONFIG_CPU_LITTLE_ENDIAN)      += -mlittle-endian
 110
 111 ifeq ($(HAS_BIARCH),y)
 112 KBUILD_CFLAGS   += -m$(BITS)
 113 KBUILD_AFLAGS   += -m$(BITS) -Wl,-a$(BITS)
 114 KBUILD_LDFLAGS  += -m elf$(BITS)$(LDEMULATION)
 115 KBUILD_ARFLAGS  += --target=elf$(BITS)-$(GNUTARGET)
 116 endif
 117
 118 cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard=tls
 119 ifdef CONFIG_PPC64
 120 cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r13
 121 else
 122 cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r2
 123 endif
 124
 125 LDFLAGS_vmlinux-y := -Bstatic
 126 LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
 127 LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y)
 128 LDFLAGS_vmlinux += $(call ld-option,--orphan-handling=warn)
 129
 130 ifdef CONFIG_PPC64
 131 ifeq ($(call cc-option-yn,-mcmodel=medium),y)
 132         # -mcmodel=medium breaks modules because it uses 32bit offsets from
 133         # the TOC pointer to create pointers where possible. Pointers into the
 134         # percpu data area are created by this method.
 135         #
 136         # The kernel module loader relocates the percpu data section from the
 137         # original location (starting with 0xd...) to somewhere in the base
 138         # kernel percpu data space (starting with 0xc...). We need a full
 139         # 64bit relocation for this to work, hence -mcmodel=large.
 140         KBUILD_CFLAGS_MODULE += -mcmodel=large
 141 else
 142         export NO_MINIMAL_TOC := -mno-minimal-toc
 143 endif
 144 endif
 145
 146 CFLAGS-$(CONFIG_PPC64)  := $(call cc-option,-mtraceback=no)
 147 ifdef CONFIG_CPU_LITTLE_ENDIAN
 148 CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc))
 149 AFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mabi=elfv2)
 150 else
 151 CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mabi=elfv1)
 152 CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mcall-aixdesc)
 153 AFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mabi=elfv1)
 154 endif
 155 CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc))
 156 CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mno-pointers-to-nested-functions)
 157
 158 # Clang unconditionally reserves r2 on ppc32 and does not support the flag
 159 # https://bugs.llvm.org/show_bug.cgi?id=39555
 160 CFLAGS-$(CONFIG_PPC32)  := $(call cc-option, -ffixed-r2)
 161
 162 # Clang doesn't support -mmultiple / -mno-multiple
 163 # https://bugs.llvm.org/show_bug.cgi?id=39556
 164 CFLAGS-$(CONFIG_PPC32)  += $(call cc-option, $(MULTIPLEWORD))
 165
 166 CFLAGS-$(CONFIG_PPC32)  += $(call cc-option,-mno-readonly-in-sdata)
 167
 168 ifdef CONFIG_PPC_BOOK3S_64
 169 ifdef CONFIG_CPU_LITTLE_ENDIAN
 170 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8
 171 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power9,-mtune=power8)
 172 else
 173 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5))
 174 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mcpu=power5,-mcpu=power4)
 175 endif
 176 else
 177 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
 178 endif
 179
 180 ifdef CONFIG_FUNCTION_TRACER
 181 CC_FLAGS_FTRACE := -pg
 182 ifdef CONFIG_MPROFILE_KERNEL
 183 CC_FLAGS_FTRACE += -mprofile-kernel
 184 endif
 185 # Work around gcc code-gen bugs with -pg / -fno-omit-frame-pointer in gcc <= 4.8
 186 # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44199
 187 # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52828
 188 ifndef CONFIG_CC_IS_CLANG
 189 CC_FLAGS_FTRACE += $(call cc-ifversion, -lt, 0409, -mno-sched-epilog)
 190 endif
 191 endif
 192
 193 CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU))
 194
 195 # Altivec option not allowed with e500mc64 in GCC.
 196 ifdef CONFIG_ALTIVEC
 197 E5500_CPU := -mcpu=powerpc64
 198 else
 199 E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
 200 endif
 201 CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU)
 202 CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
 203
 204 ifdef CONFIG_PPC32
 205 ifdef CONFIG_PPC_E500MC
 206 CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc)
 207 else
 208 CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc)
 209 endif
 210 endif
 211
 212 asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
 213
 214 KBUILD_CPPFLAGS += -Iarch/$(ARCH) $(asinstr)
 215 KBUILD_AFLAGS   += $(AFLAGS-y)
 216 KBUILD_CFLAGS   += $(call cc-option,-msoft-float)
 217 KBUILD_CFLAGS   += -pipe $(CFLAGS-y)
 218 CPP             = $(CC) -E $(KBUILD_CFLAGS)
 219
 220 CHECKFLAGS      += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__
 221 ifdef CONFIG_CPU_BIG_ENDIAN
 222 CHECKFLAGS      += -D__BIG_ENDIAN__
 223 else
 224 CHECKFLAGS      += -D__LITTLE_ENDIAN__
 225 endif
 226
 227 ifdef CONFIG_476FPE_ERR46
 228         KBUILD_LDFLAGS_MODULE += --ppc476-workaround \
 229                 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds
 230 endif
 231
 232 # No AltiVec or VSX instructions when building kernel
 233 KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
 234 KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
 235
 236 # No SPE instruction when building kernel
 237 # (We use all available options to help semi-broken compilers)
 238 KBUILD_CFLAGS += $(call cc-option,-mno-spe)
 239 KBUILD_CFLAGS += $(call cc-option,-mspe=no)
 240
 241 # FIXME: the module load should be taught about the additional relocs
 242 # generated by this.
 243 # revert to pre-gcc-4.4 behaviour of .eh_frame
 244 KBUILD_CFLAGS   += $(call cc-option,-fno-dwarf2-cfi-asm)
 245
 246 # Never use string load/store instructions as they are
 247 # often slow when they are implemented at all
 248 KBUILD_CFLAGS           += $(call cc-option,-mno-string)
 249
 250 cpu-as-$(CONFIG_4xx)            += -Wa,-m405
 251 cpu-as-$(CONFIG_ALTIVEC)        += $(call as-option,-Wa$(comma)-maltivec)
 252 cpu-as-$(CONFIG_E200)           += -Wa,-me200
 253 cpu-as-$(CONFIG_E500)           += -Wa,-me500
 254
 255 # When using '-many -mpower4' gas will first try and find a matching power4
 256 # mnemonic and failing that it will allow any valid mnemonic that GAS knows
 257 # about. GCC will pass -many to GAS when assembling, clang does not.
 258 cpu-as-$(CONFIG_PPC_BOOK3S_64)  += -Wa,-mpower4 -Wa,-many
 259 cpu-as-$(CONFIG_PPC_E500MC)     += $(call as-option,-Wa$(comma)-me500mc)
 260
 261 KBUILD_AFLAGS += $(cpu-as-y)
 262 KBUILD_CFLAGS += $(cpu-as-y)
 263
 264 KBUILD_AFLAGS += $(aflags-y)
 265 KBUILD_CFLAGS += $(cflags-y)
 266
 267 head-y                          := arch/powerpc/kernel/head_$(BITS).o
 268 head-$(CONFIG_PPC_8xx)          := arch/powerpc/kernel/head_8xx.o
 269 head-$(CONFIG_40x)              := arch/powerpc/kernel/head_40x.o
 270 head-$(CONFIG_44x)              := arch/powerpc/kernel/head_44x.o
 271 head-$(CONFIG_FSL_BOOKE)        := arch/powerpc/kernel/head_fsl_booke.o
 272
 273 head-$(CONFIG_PPC64)            += arch/powerpc/kernel/entry_64.o
 274 head-$(CONFIG_PPC_FPU)          += arch/powerpc/kernel/fpu.o
 275 head-$(CONFIG_ALTIVEC)          += arch/powerpc/kernel/vector.o
 276 head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE)  += arch/powerpc/kernel/prom_init.o
 277
 278 # See arch/powerpc/Kbuild for content of core part of the kernel
 279 core-y += arch/powerpc/
 280
 281 drivers-$(CONFIG_OPROFILE)      += arch/powerpc/oprofile/
 282
 283 # Default to zImage, override when needed
 284 all: zImage
 285
 286 # With make 3.82 we cannot mix normal and wildcard targets
 287 BOOT_TARGETS1 := zImage zImage.initrd uImage
 288 BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
 289
 290 PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
 291
 292 boot := arch/$(ARCH)/boot
 293
 294 $(BOOT_TARGETS1): vmlinux
 295         $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 296 $(BOOT_TARGETS2): vmlinux
 297         $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 298
 299
 300 bootwrapper_install:
 301         $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 302
 303 # Used to create 'merged defconfigs'
 304 # To use it $(call) it with the first argument as the base defconfig
 305 # and the second argument as a space separated list of .config files to merge,
 306 # without the .config suffix.
 307 define merge_into_defconfig
 308         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
 309                 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \
 310                 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config)
 311         +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
 312 endef
 313
 314 PHONY += pseries_le_defconfig
 315 pseries_le_defconfig:
 316         $(call merge_into_defconfig,pseries_defconfig,le)
 317
 318 PHONY += ppc64le_defconfig
 319 ppc64le_defconfig:
 320         $(call merge_into_defconfig,ppc64_defconfig,le)
 321
 322 PHONY += ppc64le_guest_defconfig
 323 ppc64le_guest_defconfig:
 324         $(call merge_into_defconfig,ppc64_defconfig,le guest)
 325
 326 PHONY += ppc64_guest_defconfig
 327 ppc64_guest_defconfig:
 328         $(call merge_into_defconfig,ppc64_defconfig,be guest)
 329
 330 PHONY += powernv_be_defconfig
 331 powernv_be_defconfig:
 332         $(call merge_into_defconfig,powernv_defconfig,be)
 333
 334 PHONY += mpc85xx_defconfig
 335 mpc85xx_defconfig:
 336         $(call merge_into_defconfig,mpc85xx_basic_defconfig,\
 337                 85xx-32bit 85xx-hw fsl-emb-nonhw)
 338
 339 PHONY += mpc85xx_smp_defconfig
 340 mpc85xx_smp_defconfig:
 341         $(call merge_into_defconfig,mpc85xx_basic_defconfig,\
 342                 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)
 343
 344 PHONY += corenet32_smp_defconfig
 345 corenet32_smp_defconfig:
 346         $(call merge_into_defconfig,corenet_basic_defconfig,\
 347                 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa)
 348
 349 PHONY += corenet64_smp_defconfig
 350 corenet64_smp_defconfig:
 351         $(call merge_into_defconfig,corenet_basic_defconfig,\
 352                 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa)
 353
 354 PHONY += mpc86xx_defconfig
 355 mpc86xx_defconfig:
 356         $(call merge_into_defconfig,mpc86xx_basic_defconfig,\
 357                 86xx-hw fsl-emb-nonhw)
 358
 359 PHONY += mpc86xx_smp_defconfig
 360 mpc86xx_smp_defconfig:
 361         $(call merge_into_defconfig,mpc86xx_basic_defconfig,\
 362                 86xx-smp 86xx-hw fsl-emb-nonhw)
 363
 364 PHONY += ppc32_allmodconfig
 365 ppc32_allmodconfig:
 366         $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \
 367                 -f $(srctree)/Makefile allmodconfig
 368
 369 PHONY += ppc_defconfig
 370 ppc_defconfig:
 371         $(call merge_into_defconfig,book3s_32.config,)
 372
 373 PHONY += ppc64le_allmodconfig
 374 ppc64le_allmodconfig:
 375         $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \
 376                 -f $(srctree)/Makefile allmodconfig
 377
 378 PHONY += ppc64_book3e_allmodconfig
 379 ppc64_book3e_allmodconfig:
 380         $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \
 381                 -f $(srctree)/Makefile allmodconfig
 382
 383 define archhelp
 384   @echo '* zImage          - Build default images selected by kernel config'
 385   @echo '  zImage.*        - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
 386   @echo '  uImage          - U-Boot native image format'
 387   @echo '  cuImage.<dt>    - Backwards compatible U-Boot image for older'
 388   @echo '                    versions which do not support device trees'
 389   @echo '  dtbImage.<dt>   - zImage with an embedded device tree blob'
 390   @echo '  simpleImage.<dt> - Firmware independent image.'
 391   @echo '  treeImage.<dt>  - Support for older IBM 4xx firmware (not U-Boot)'
 392   @echo '  install         - Install kernel using'
 393   @echo '                    (your) ~/bin/$(INSTALLKERNEL) or'
 394   @echo '                    (distribution) /sbin/$(INSTALLKERNEL) or'
 395   @echo '                    install to $$(INSTALL_PATH) and run lilo'
 396   @echo '  *_defconfig     - Select default config from arch/$(ARCH)/configs'
 397   @echo ''
 398   @echo '  Targets with <dt> embed a device tree blob inside the image'
 399   @echo '  These targets support board with firmware that does not'
 400   @echo '  support passing a device tree directly.  Replace <dt> with the'
 401   @echo '  name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
 402   @echo '  (minus the .dts extension).'
 403 endef
 404
 405 install:
 406         $(Q)$(MAKE) $(build)=$(boot) install
 407
 408 vdso_install:
 409 ifdef CONFIG_PPC64
 410         $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
 411 endif
 412 ifdef CONFIG_VDSO32
 413         $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
 414 endif
 415
 416 archclean:
 417         $(Q)$(MAKE) $(clean)=$(boot)
 418
 419 archprepare: checkbin
 420
 421 archheaders:
 422         $(Q)$(MAKE) $(build)=arch/powerpc/kernel/syscalls all
 423
 424 ifdef CONFIG_STACKPROTECTOR
 425 prepare: stack_protector_prepare
 426
 427 stack_protector_prepare: prepare0
 428 ifdef CONFIG_PPC64
 429         $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' include/generated/asm-offsets.h))
 430 else
 431         $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' include/generated/asm-offsets.h))
 432 endif
 433 endif
 434
 435 ifdef CONFIG_SMP
 436 prepare: task_cpu_prepare
 437
 438 task_cpu_prepare: prepare0
 439         $(eval KBUILD_CFLAGS += -D_TASK_CPU=$(shell awk '{if ($$2 == "TASK_CPU") print $$3;}' include/generated/asm-offsets.h))
 440 endif
 441
 442 # Check toolchain versions:
 443 # - gcc-4.6 is the minimum kernel-wide version so nothing required.
 444 checkbin:
 445         @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \
 446             && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \
 447                 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \
 448                 echo 'in some circumstances.' ; \
 449                 echo -n '*** Please use a different binutils version.' ; \
 450                 false ; \
 451         fi