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 new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
  43
  44 ifeq ($(new_nm),y)
  45 NM              := $(NM) --synthetic
  46 endif
  47
  48 # BITS is used as extension for files which are available in a 32 bit
  49 # and a 64 bit version to simplify shared Makefiles.
  50 # e.g.: obj-y += foo_$(BITS).o
  51 export BITS
  52
  53 ifdef CONFIG_PPC64
  54         BITS := 64
  55 else
  56         BITS := 32
  57 endif
  58
  59 machine-y = ppc
  60 machine-$(CONFIG_PPC64) += 64
  61 machine-$(CONFIG_CPU_LITTLE_ENDIAN) += le
  62 UTS_MACHINE := $(subst $(space),,$(machine-y))
  63
  64 # XXX This needs to be before we override LD below
  65 ifdef CONFIG_PPC32
  66 KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
  67 else
  68 KBUILD_LDS_MODULE += $(srctree)/arch/powerpc/kernel/module.lds
  69 ifeq ($(call ld-ifversion, -ge, 225000000, y),y)
  70 # Have the linker provide sfpr if possible.
  71 # There is a corresponding test in arch/powerpc/lib/Makefile
  72 KBUILD_LDFLAGS_MODULE += --save-restore-funcs
  73 else
  74 KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
  75 endif
  76 endif
  77
  78 ifdef CONFIG_CPU_LITTLE_ENDIAN
  79 KBUILD_CFLAGS   += -mlittle-endian
  80 KBUILD_LDFLAGS  += -EL
  81 LDEMULATION     := lppc
  82 GNUTARGET       := powerpcle
  83 MULTIPLEWORD    := -mno-multiple
  84 KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect)
  85 else
  86 KBUILD_CFLAGS += $(call cc-option,-mbig-endian)
  87 KBUILD_LDFLAGS  += -EB
  88 LDEMULATION     := ppc
  89 GNUTARGET       := powerpc
  90 MULTIPLEWORD    := -mmultiple
  91 endif
  92
  93 ifdef CONFIG_PPC64
  94 ifndef CONFIG_CC_IS_CLANG
  95 cflags-$(CONFIG_CPU_BIG_ENDIAN)         += $(call cc-option,-mabi=elfv1)
  96 cflags-$(CONFIG_CPU_BIG_ENDIAN)         += $(call cc-option,-mcall-aixdesc)
  97 aflags-$(CONFIG_CPU_BIG_ENDIAN)         += $(call cc-option,-mabi=elfv1)
  98 aflags-$(CONFIG_CPU_LITTLE_ENDIAN)      += -mabi=elfv2
  99 endif
 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 endif
 116
 117 cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard=tls
 118 ifdef CONFIG_PPC64
 119 cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r13
 120 else
 121 cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r2
 122 endif
 123
 124 LDFLAGS_vmlinux-y := -Bstatic
 125 LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
 126 LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y)
 127 LDFLAGS_vmlinux += $(call ld-option,--orphan-handling=warn)
 128
 129 ifdef CONFIG_PPC64
 130 ifeq ($(call cc-option-yn,-mcmodel=medium),y)
 131         # -mcmodel=medium breaks modules because it uses 32bit offsets from
 132         # the TOC pointer to create pointers where possible. Pointers into the
 133         # percpu data area are created by this method.
 134         #
 135         # The kernel module loader relocates the percpu data section from the
 136         # original location (starting with 0xd...) to somewhere in the base
 137         # kernel percpu data space (starting with 0xc...). We need a full
 138         # 64bit relocation for this to work, hence -mcmodel=large.
 139         KBUILD_CFLAGS_MODULE += -mcmodel=large
 140 else
 141         export NO_MINIMAL_TOC := -mno-minimal-toc
 142 endif
 143 endif
 144
 145 CFLAGS-$(CONFIG_PPC64)  := $(call cc-option,-mtraceback=no)
 146 ifndef CONFIG_CC_IS_CLANG
 147 ifdef CONFIG_CPU_LITTLE_ENDIAN
 148 CFLAGS-$(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)  += $(call cc-option,-mabi=elfv1)
 154 endif
 155 endif
 156 CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc))
 157 CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mno-pointers-to-nested-functions)
 158
 159 # Clang unconditionally reserves r2 on ppc32 and does not support the flag
 160 # https://bugs.llvm.org/show_bug.cgi?id=39555
 161 CFLAGS-$(CONFIG_PPC32)  := $(call cc-option, -ffixed-r2)
 162
 163 # Clang doesn't support -mmultiple / -mno-multiple
 164 # https://bugs.llvm.org/show_bug.cgi?id=39556
 165 CFLAGS-$(CONFIG_PPC32)  += $(call cc-option, $(MULTIPLEWORD))
 166
 167 CFLAGS-$(CONFIG_PPC32)  += $(call cc-option,-mno-readonly-in-sdata)
 168
 169 ifdef CONFIG_PPC_BOOK3S_64
 170 ifdef CONFIG_CPU_LITTLE_ENDIAN
 171 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8
 172 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power9,-mtune=power8)
 173 else
 174 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5))
 175 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mcpu=power5,-mcpu=power4)
 176 endif
 177 else
 178 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
 179 endif
 180
 181 ifdef CONFIG_FUNCTION_TRACER
 182 CC_FLAGS_FTRACE := -pg
 183 ifdef CONFIG_MPROFILE_KERNEL
 184 CC_FLAGS_FTRACE += -mprofile-kernel
 185 endif
 186 # Work around gcc code-gen bugs with -pg / -fno-omit-frame-pointer in gcc <= 4.8
 187 # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44199
 188 # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52828
 189 ifndef CONFIG_CC_IS_CLANG
 190 CC_FLAGS_FTRACE += $(call cc-ifversion, -lt, 0409, -mno-sched-epilog)
 191 endif
 192 endif
 193
 194 CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU))
 195
 196 # Altivec option not allowed with e500mc64 in GCC.
 197 ifdef CONFIG_ALTIVEC
 198 E5500_CPU := -mcpu=powerpc64
 199 else
 200 E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
 201 endif
 202 CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU)
 203 CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
 204
 205 ifdef CONFIG_PPC32
 206 ifdef CONFIG_PPC_E500MC
 207 CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc)
 208 else
 209 CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc)
 210 endif
 211 endif
 212
 213 asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
 214
 215 KBUILD_CPPFLAGS += -I $(srctree)/arch/$(ARCH) $(asinstr)
 216 KBUILD_AFLAGS   += $(AFLAGS-y)
 217 KBUILD_CFLAGS   += $(call cc-option,-msoft-float)
 218 KBUILD_CFLAGS   += -pipe $(CFLAGS-y)
 219 CPP             = $(CC) -E $(KBUILD_CFLAGS)
 220
 221 CHECKFLAGS      += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__
 222 ifdef CONFIG_CPU_BIG_ENDIAN
 223 CHECKFLAGS      += -D__BIG_ENDIAN__
 224 else
 225 CHECKFLAGS      += -D__LITTLE_ENDIAN__
 226 endif
 227
 228 ifdef CONFIG_476FPE_ERR46
 229         KBUILD_LDFLAGS_MODULE += --ppc476-workaround \
 230                 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds
 231 endif
 232
 233 # No AltiVec or VSX instructions when building kernel
 234 KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
 235 KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
 236
 237 # No SPE instruction when building kernel
 238 # (We use all available options to help semi-broken compilers)
 239 KBUILD_CFLAGS += $(call cc-option,-mno-spe)
 240 KBUILD_CFLAGS += $(call cc-option,-mspe=no)
 241
 242 # FIXME: the module load should be taught about the additional relocs
 243 # generated by this.
 244 # revert to pre-gcc-4.4 behaviour of .eh_frame
 245 KBUILD_CFLAGS   += $(call cc-option,-fno-dwarf2-cfi-asm)
 246
 247 # Never use string load/store instructions as they are
 248 # often slow when they are implemented at all
 249 KBUILD_CFLAGS           += $(call cc-option,-mno-string)
 250
 251 cpu-as-$(CONFIG_4xx)            += -Wa,-m405
 252 cpu-as-$(CONFIG_ALTIVEC)        += $(call as-option,-Wa$(comma)-maltivec)
 253 cpu-as-$(CONFIG_E200)           += -Wa,-me200
 254 cpu-as-$(CONFIG_E500)           += -Wa,-me500
 255
 256 # When using '-many -mpower4' gas will first try and find a matching power4
 257 # mnemonic and failing that it will allow any valid mnemonic that GAS knows
 258 # about. GCC will pass -many to GAS when assembling, clang does not.
 259 cpu-as-$(CONFIG_PPC_BOOK3S_64)  += -Wa,-mpower4 -Wa,-many
 260 cpu-as-$(CONFIG_PPC_E500MC)     += $(call as-option,-Wa$(comma)-me500mc)
 261
 262 KBUILD_AFLAGS += $(cpu-as-y)
 263 KBUILD_CFLAGS += $(cpu-as-y)
 264
 265 KBUILD_AFLAGS += $(aflags-y)
 266 KBUILD_CFLAGS += $(cflags-y)
 267
 268 head-y                          := arch/powerpc/kernel/head_$(BITS).o
 269 head-$(CONFIG_PPC_8xx)          := arch/powerpc/kernel/head_8xx.o
 270 head-$(CONFIG_40x)              := arch/powerpc/kernel/head_40x.o
 271 head-$(CONFIG_44x)              := arch/powerpc/kernel/head_44x.o
 272 head-$(CONFIG_FSL_BOOKE)        := arch/powerpc/kernel/head_fsl_booke.o
 273
 274 head-$(CONFIG_PPC64)            += arch/powerpc/kernel/entry_64.o
 275 head-$(CONFIG_PPC_FPU)          += arch/powerpc/kernel/fpu.o
 276 head-$(CONFIG_ALTIVEC)          += arch/powerpc/kernel/vector.o
 277 head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE)  += arch/powerpc/kernel/prom_init.o
 278
 279 # See arch/powerpc/Kbuild for content of core part of the kernel
 280 core-y += arch/powerpc/
 281
 282 drivers-$(CONFIG_OPROFILE)      += arch/powerpc/oprofile/
 283
 284 # Default to zImage, override when needed
 285 all: zImage
 286
 287 # With make 3.82 we cannot mix normal and wildcard targets
 288 BOOT_TARGETS1 := zImage zImage.initrd uImage
 289 BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
 290
 291 PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
 292
 293 boot := arch/$(ARCH)/boot
 294
 295 $(BOOT_TARGETS1): vmlinux
 296         $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 297 $(BOOT_TARGETS2): vmlinux
 298         $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 299
 300
 301 bootwrapper_install:
 302         $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 303
 304 # Used to create 'merged defconfigs'
 305 # To use it $(call) it with the first argument as the base defconfig
 306 # and the second argument as a space separated list of .config files to merge,
 307 # without the .config suffix.
 308 define merge_into_defconfig
 309         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
 310                 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \
 311                 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config)
 312         +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
 313 endef
 314
 315 PHONY += pseries_le_defconfig
 316 pseries_le_defconfig:
 317         $(call merge_into_defconfig,pseries_defconfig,le)
 318
 319 PHONY += ppc64le_defconfig
 320 ppc64le_defconfig:
 321         $(call merge_into_defconfig,ppc64_defconfig,le)
 322
 323 PHONY += ppc64le_guest_defconfig
 324 ppc64le_guest_defconfig:
 325         $(call merge_into_defconfig,ppc64_defconfig,le guest)
 326
 327 PHONY += ppc64_guest_defconfig
 328 ppc64_guest_defconfig:
 329         $(call merge_into_defconfig,ppc64_defconfig,be guest)
 330
 331 PHONY += powernv_be_defconfig
 332 powernv_be_defconfig:
 333         $(call merge_into_defconfig,powernv_defconfig,be)
 334
 335 PHONY += mpc85xx_defconfig
 336 mpc85xx_defconfig:
 337         $(call merge_into_defconfig,mpc85xx_base.config,\
 338                 85xx-32bit 85xx-hw fsl-emb-nonhw)
 339
 340 PHONY += mpc85xx_smp_defconfig
 341 mpc85xx_smp_defconfig:
 342         $(call merge_into_defconfig,mpc85xx_base.config,\
 343                 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)
 344
 345 PHONY += corenet32_smp_defconfig
 346 corenet32_smp_defconfig:
 347         $(call merge_into_defconfig,corenet_base.config,\
 348                 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa)
 349
 350 PHONY += corenet64_smp_defconfig
 351 corenet64_smp_defconfig:
 352         $(call merge_into_defconfig,corenet_base.config,\
 353                 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa)
 354
 355 PHONY += mpc86xx_defconfig
 356 mpc86xx_defconfig:
 357         $(call merge_into_defconfig,mpc86xx_base.config,\
 358                 86xx-hw fsl-emb-nonhw)
 359
 360 PHONY += mpc86xx_smp_defconfig
 361 mpc86xx_smp_defconfig:
 362         $(call merge_into_defconfig,mpc86xx_base.config,\
 363                 86xx-smp 86xx-hw fsl-emb-nonhw)
 364
 365 PHONY += ppc32_allmodconfig
 366 ppc32_allmodconfig:
 367         $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \
 368                 -f $(srctree)/Makefile allmodconfig
 369
 370 PHONY += ppc_defconfig
 371 ppc_defconfig:
 372         $(call merge_into_defconfig,book3s_32.config,)
 373
 374 PHONY += ppc64le_allmodconfig
 375 ppc64le_allmodconfig:
 376         $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \
 377                 -f $(srctree)/Makefile allmodconfig
 378
 379 PHONY += ppc64_book3e_allmodconfig
 380 ppc64_book3e_allmodconfig:
 381         $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \
 382                 -f $(srctree)/Makefile allmodconfig
 383
 384 define archhelp
 385   @echo '* zImage          - Build default images selected by kernel config'
 386   @echo '  zImage.*        - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
 387   @echo '  uImage          - U-Boot native image format'
 388   @echo '  cuImage.<dt>    - Backwards compatible U-Boot image for older'
 389   @echo '                    versions which do not support device trees'
 390   @echo '  dtbImage.<dt>   - zImage with an embedded device tree blob'
 391   @echo '  simpleImage.<dt> - Firmware independent image.'
 392   @echo '  treeImage.<dt>  - Support for older IBM 4xx firmware (not U-Boot)'
 393   @echo '  install         - Install kernel using'
 394   @echo '                    (your) ~/bin/$(INSTALLKERNEL) or'
 395   @echo '                    (distribution) /sbin/$(INSTALLKERNEL) or'
 396   @echo '                    install to $$(INSTALL_PATH) and run lilo'
 397   @echo '  *_defconfig     - Select default config from arch/$(ARCH)/configs'
 398   @echo ''
 399   @echo '  Targets with <dt> embed a device tree blob inside the image'
 400   @echo '  These targets support board with firmware that does not'
 401   @echo '  support passing a device tree directly.  Replace <dt> with the'
 402   @echo '  name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
 403   @echo '  (minus the .dts extension).'
 404 endef
 405
 406 install:
 407         $(Q)$(MAKE) $(build)=$(boot) install
 408
 409 vdso_install:
 410 ifdef CONFIG_PPC64
 411         $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
 412 endif
 413 ifdef CONFIG_VDSO32
 414         $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
 415 endif
 416
 417 archclean:
 418         $(Q)$(MAKE) $(clean)=$(boot)
 419
 420 archprepare: checkbin
 421
 422 archheaders:
 423         $(Q)$(MAKE) $(build)=arch/powerpc/kernel/syscalls all
 424
 425 ifdef CONFIG_STACKPROTECTOR
 426 prepare: stack_protector_prepare
 427
 428 stack_protector_prepare: prepare0
 429 ifdef CONFIG_PPC64
 430         $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' include/generated/asm-offsets.h))
 431 else
 432         $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' include/generated/asm-offsets.h))
 433 endif
 434 endif
 435
 436 ifdef CONFIG_SMP
 437 prepare: task_cpu_prepare
 438
 439 task_cpu_prepare: prepare0
 440         $(eval KBUILD_CFLAGS += -D_TASK_CPU=$(shell awk '{if ($$2 == "TASK_CPU") print $$3;}' include/generated/asm-offsets.h))
 441 endif
 442
 443 # Check toolchain versions:
 444 # - gcc-4.6 is the minimum kernel-wide version so nothing required.
 445 checkbin:
 446         @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \
 447             && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \
 448                 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \
 449                 echo 'in some circumstances.' ; \
 450                 echo -n '*** Please use a different binutils version.' ; \
 451                 false ; \
 452         fi