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 CROSS32CC               := $(CROSS32_COMPILE)gcc
  21 CROSS32AR               := $(CROSS32_COMPILE)ar
  22
  23 ifeq ($(HAS_BIARCH),y)
  24 ifeq ($(CROSS32_COMPILE),)
  25 CROSS32CC       := $(CC) -m32
  26 KBUILD_ARFLAGS  += --target=elf32-powerpc
  27 endif
  28 endif
  29
  30 export CROSS32CC CROSS32AR
  31
  32 ifeq ($(CROSS_COMPILE),)
  33 KBUILD_DEFCONFIG := $(shell uname -m)_defconfig
  34 else
  35 KBUILD_DEFCONFIG := ppc64_defconfig
  36 endif
  37
  38 ifeq ($(CONFIG_PPC64),y)
  39 new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
  40
  41 ifeq ($(new_nm),y)
  42 NM              := $(NM) --synthetic
  43 endif
  44 endif
  45
  46 # BITS is used as extension for files which are available in a 32 bit
  47 # and a 64 bit version to simplify shared Makefiles.
  48 # e.g.: obj-y += foo_$(BITS).o
  49 export BITS
  50
  51 ifdef CONFIG_PPC64
  52         BITS := 64
  53 else
  54         BITS := 32
  55 endif
  56
  57 machine-y = ppc
  58 machine-$(CONFIG_PPC64) += 64
  59 machine-$(CONFIG_CPU_LITTLE_ENDIAN) += le
  60 UTS_MACHINE := $(subst $(space),,$(machine-y))
  61
  62 # XXX This needs to be before we override LD below
  63 ifdef CONFIG_PPC32
  64 KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
  65 else
  66 ifeq ($(call ld-ifversion, -ge, 225000000, y),y)
  67 # Have the linker provide sfpr if possible.
  68 # There is a corresponding test in arch/powerpc/lib/Makefile
  69 KBUILD_LDFLAGS_MODULE += --save-restore-funcs
  70 else
  71 KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
  72 endif
  73 endif
  74
  75 ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
  76 override LD     += -EL
  77 LDEMULATION     := lppc
  78 GNUTARGET       := powerpcle
  79 MULTIPLEWORD    := -mno-multiple
  80 KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect)
  81 else
  82 override LD     += -EB
  83 LDEMULATION     := ppc
  84 GNUTARGET       := powerpc
  85 MULTIPLEWORD    := -mmultiple
  86 endif
  87
  88 ifdef CONFIG_PPC64
  89 cflags-$(CONFIG_CPU_BIG_ENDIAN)         += $(call cc-option,-mabi=elfv1)
  90 cflags-$(CONFIG_CPU_BIG_ENDIAN)         += $(call cc-option,-mcall-aixdesc)
  91 aflags-$(CONFIG_CPU_BIG_ENDIAN)         += $(call cc-option,-mabi=elfv1)
  92 aflags-$(CONFIG_CPU_LITTLE_ENDIAN)      += -mabi=elfv2
  93 endif
  94
  95 cflags-$(CONFIG_CPU_LITTLE_ENDIAN)      += -mlittle-endian
  96 cflags-$(CONFIG_CPU_BIG_ENDIAN)         += $(call cc-option,-mbig-endian)
  97 ifneq ($(cc-name),clang)
  98   cflags-$(CONFIG_CPU_LITTLE_ENDIAN)    += -mno-strict-align
  99 endif
 100
 101 aflags-$(CONFIG_CPU_BIG_ENDIAN)         += $(call cc-option,-mbig-endian)
 102 aflags-$(CONFIG_CPU_LITTLE_ENDIAN)      += -mlittle-endian
 103
 104 ifeq ($(HAS_BIARCH),y)
 105 override AS     += -a$(BITS)
 106 override LD     += -m elf$(BITS)$(LDEMULATION)
 107 override CC     += -m$(BITS)
 108 KBUILD_ARFLAGS  += --target=elf$(BITS)-$(GNUTARGET)
 109 endif
 110
 111 LDFLAGS_vmlinux-y := -Bstatic
 112 LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
 113 LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y)
 114 LDFLAGS_vmlinux += $(call ld-option,--orphan-handling=warn)
 115
 116 ifeq ($(CONFIG_PPC64),y)
 117 ifeq ($(call cc-option-yn,-mcmodel=medium),y)
 118         # -mcmodel=medium breaks modules because it uses 32bit offsets from
 119         # the TOC pointer to create pointers where possible. Pointers into the
 120         # percpu data area are created by this method.
 121         #
 122         # The kernel module loader relocates the percpu data section from the
 123         # original location (starting with 0xd...) to somewhere in the base
 124         # kernel percpu data space (starting with 0xc...). We need a full
 125         # 64bit relocation for this to work, hence -mcmodel=large.
 126         KBUILD_CFLAGS_MODULE += -mcmodel=large
 127 else
 128         export NO_MINIMAL_TOC := -mno-minimal-toc
 129 endif
 130 endif
 131
 132 CFLAGS-$(CONFIG_PPC64)  := $(call cc-option,-mtraceback=no)
 133 ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
 134 CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc))
 135 AFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mabi=elfv2)
 136 else
 137 CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mabi=elfv1)
 138 CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mcall-aixdesc)
 139 AFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mabi=elfv1)
 140 endif
 141 CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc))
 142 CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mno-pointers-to-nested-functions)
 143 CFLAGS-$(CONFIG_PPC32)  := -ffixed-r2 $(MULTIPLEWORD)
 144
 145 ifeq ($(CONFIG_PPC_BOOK3S_64),y)
 146 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,-mtune=power4)
 147 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power4
 148 else
 149 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
 150 endif
 151
 152 ifdef CONFIG_MPROFILE_KERNEL
 153     ifeq ($(shell $(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -I$(srctree)/include -D__KERNEL__),OK)
 154         CC_FLAGS_FTRACE := -pg -mprofile-kernel
 155         KBUILD_CPPFLAGS += -DCC_USING_MPROFILE_KERNEL
 156     else
 157         # If the user asked for mprofile-kernel but the toolchain doesn't
 158         # support it, emit a warning and deliberately break the build later
 159         # with mprofile-kernel-not-supported. We would prefer to make this an
 160         # error right here, but then the user would never be able to run
 161         # oldconfig to change their configuration.
 162         $(warning Compiler does not support mprofile-kernel, set CONFIG_DISABLE_MPROFILE_KERNEL)
 163         CC_FLAGS_FTRACE := -mprofile-kernel-not-supported
 164     endif
 165 endif
 166
 167 CFLAGS-$(CONFIG_CELL_CPU) += $(call cc-option,-mcpu=cell)
 168 CFLAGS-$(CONFIG_POWER4_CPU) += $(call cc-option,-mcpu=power4)
 169 CFLAGS-$(CONFIG_POWER5_CPU) += $(call cc-option,-mcpu=power5)
 170 CFLAGS-$(CONFIG_POWER6_CPU) += $(call cc-option,-mcpu=power6)
 171 CFLAGS-$(CONFIG_POWER7_CPU) += $(call cc-option,-mcpu=power7)
 172 CFLAGS-$(CONFIG_POWER8_CPU) += $(call cc-option,-mcpu=power8)
 173
 174 # Altivec option not allowed with e500mc64 in GCC.
 175 ifeq ($(CONFIG_ALTIVEC),y)
 176 E5500_CPU := -mcpu=powerpc64
 177 else
 178 E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
 179 endif
 180 CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU)
 181 CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
 182
 183 ifeq ($(CONFIG_PPC32),y)
 184 ifeq ($(CONFIG_PPC_E500MC),y)
 185 CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc)
 186 else
 187 CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc)
 188 endif
 189 endif
 190
 191 asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
 192
 193 KBUILD_CPPFLAGS += -Iarch/$(ARCH) $(asinstr)
 194 KBUILD_AFLAGS   += -Iarch/$(ARCH) $(AFLAGS-y)
 195 KBUILD_CFLAGS   += $(call cc-option,-msoft-float)
 196 KBUILD_CFLAGS   += -pipe -Iarch/$(ARCH) $(CFLAGS-y)
 197 CPP             = $(CC) -E $(KBUILD_CFLAGS)
 198
 199 CHECKFLAGS      += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__
 200 ifdef CONFIG_CPU_BIG_ENDIAN
 201 CHECKFLAGS      += -D__BIG_ENDIAN__
 202 else
 203 CHECKFLAGS      += -D__LITTLE_ENDIAN__
 204 endif
 205
 206 ifeq ($(CONFIG_476FPE_ERR46),y)
 207         KBUILD_LDFLAGS_MODULE += --ppc476-workaround \
 208                 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds
 209 endif
 210
 211 # No AltiVec or VSX instructions when building kernel
 212 KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
 213 KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
 214
 215 # No SPE instruction when building kernel
 216 # (We use all available options to help semi-broken compilers)
 217 KBUILD_CFLAGS += $(call cc-option,-mno-spe)
 218 KBUILD_CFLAGS += $(call cc-option,-mspe=no)
 219
 220 # Enable unit-at-a-time mode when possible. It shrinks the
 221 # kernel considerably.
 222 KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
 223
 224 # FIXME: the module load should be taught about the additional relocs
 225 # generated by this.
 226 # revert to pre-gcc-4.4 behaviour of .eh_frame
 227 KBUILD_CFLAGS   += $(call cc-option,-fno-dwarf2-cfi-asm)
 228
 229 # Never use string load/store instructions as they are
 230 # often slow when they are implemented at all
 231 KBUILD_CFLAGS           += $(call cc-option,-mno-string)
 232
 233 ifeq ($(CONFIG_6xx),y)
 234 KBUILD_CFLAGS           += -mcpu=powerpc
 235 endif
 236
 237 # Work around a gcc code-gen bug with -fno-omit-frame-pointer.
 238 ifeq ($(CONFIG_FUNCTION_TRACER),y)
 239 # Work around gcc code-gen bugs with -pg / -fno-omit-frame-pointer in gcc <= 4.8
 240 # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44199
 241 # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52828
 242 ifneq ($(cc-name),clang)
 243 KBUILD_CFLAGS           += $(call cc-ifversion, -lt, 0409, -mno-sched-epilog)
 244 endif
 245 endif
 246
 247 cpu-as-$(CONFIG_4xx)            += -Wa,-m405
 248 cpu-as-$(CONFIG_ALTIVEC)        += $(call as-option,-Wa$(comma)-maltivec)
 249 cpu-as-$(CONFIG_E200)           += -Wa,-me200
 250
 251 KBUILD_AFLAGS += $(cpu-as-y)
 252 KBUILD_CFLAGS += $(cpu-as-y)
 253
 254 KBUILD_AFLAGS += $(aflags-y)
 255 KBUILD_CFLAGS += $(cflags-y)
 256
 257 head-y                          := arch/powerpc/kernel/head_$(BITS).o
 258 head-$(CONFIG_PPC_8xx)          := arch/powerpc/kernel/head_8xx.o
 259 head-$(CONFIG_40x)              := arch/powerpc/kernel/head_40x.o
 260 head-$(CONFIG_44x)              := arch/powerpc/kernel/head_44x.o
 261 head-$(CONFIG_FSL_BOOKE)        := arch/powerpc/kernel/head_fsl_booke.o
 262
 263 head-$(CONFIG_PPC64)            += arch/powerpc/kernel/entry_64.o
 264 head-$(CONFIG_PPC_FPU)          += arch/powerpc/kernel/fpu.o
 265 head-$(CONFIG_ALTIVEC)          += arch/powerpc/kernel/vector.o
 266 head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE)  += arch/powerpc/kernel/prom_init.o
 267
 268 core-y                          += arch/powerpc/kernel/ \
 269                                    arch/powerpc/mm/ \
 270                                    arch/powerpc/lib/ \
 271                                    arch/powerpc/sysdev/ \
 272                                    arch/powerpc/platforms/ \
 273                                    arch/powerpc/math-emu/ \
 274                                    arch/powerpc/crypto/ \
 275                                    arch/powerpc/net/
 276 core-$(CONFIG_XMON)             += arch/powerpc/xmon/
 277 core-$(CONFIG_KVM)              += arch/powerpc/kvm/
 278 core-$(CONFIG_PERF_EVENTS)      += arch/powerpc/perf/
 279 core-$(CONFIG_KEXEC_FILE)       += arch/powerpc/purgatory/
 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 %.dtb: scripts
 304         $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 305
 306 # Used to create 'merged defconfigs'
 307 # To use it $(call) it with the first argument as the base defconfig
 308 # and the second argument as a space separated list of .config files to merge,
 309 # without the .config suffix.
 310 define merge_into_defconfig
 311         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
 312                 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \
 313                 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config)
 314         +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
 315 endef
 316
 317 PHONY += pseries_le_defconfig
 318 pseries_le_defconfig:
 319         $(call merge_into_defconfig,pseries_defconfig,le)
 320
 321 PHONY += ppc64le_defconfig
 322 ppc64le_defconfig:
 323         $(call merge_into_defconfig,ppc64_defconfig,le)
 324
 325 PHONY += powernv_be_defconfig
 326 powernv_be_defconfig:
 327         $(call merge_into_defconfig,powernv_defconfig,be)
 328
 329 PHONY += mpc85xx_defconfig
 330 mpc85xx_defconfig:
 331         $(call merge_into_defconfig,mpc85xx_basic_defconfig,\
 332                 85xx-32bit 85xx-hw fsl-emb-nonhw)
 333
 334 PHONY += mpc85xx_smp_defconfig
 335 mpc85xx_smp_defconfig:
 336         $(call merge_into_defconfig,mpc85xx_basic_defconfig,\
 337                 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)
 338
 339 PHONY += corenet32_smp_defconfig
 340 corenet32_smp_defconfig:
 341         $(call merge_into_defconfig,corenet_basic_defconfig,\
 342                 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa)
 343
 344 PHONY += corenet64_smp_defconfig
 345 corenet64_smp_defconfig:
 346         $(call merge_into_defconfig,corenet_basic_defconfig,\
 347                 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa)
 348
 349 PHONY += mpc86xx_defconfig
 350 mpc86xx_defconfig:
 351         $(call merge_into_defconfig,mpc86xx_basic_defconfig,\
 352                 86xx-hw fsl-emb-nonhw)
 353
 354 PHONY += mpc86xx_smp_defconfig
 355 mpc86xx_smp_defconfig:
 356         $(call merge_into_defconfig,mpc86xx_basic_defconfig,\
 357                 86xx-smp 86xx-hw fsl-emb-nonhw)
 358
 359 define archhelp
 360   @echo '* zImage          - Build default images selected by kernel config'
 361   @echo '  zImage.*        - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
 362   @echo '  uImage          - U-Boot native image format'
 363   @echo '  cuImage.<dt>    - Backwards compatible U-Boot image for older'
 364   @echo '                    versions which do not support device trees'
 365   @echo '  dtbImage.<dt>   - zImage with an embedded device tree blob'
 366   @echo '  simpleImage.<dt> - Firmware independent image.'
 367   @echo '  treeImage.<dt>  - Support for older IBM 4xx firmware (not U-Boot)'
 368   @echo '  install         - Install kernel using'
 369   @echo '                    (your) ~/bin/$(INSTALLKERNEL) or'
 370   @echo '                    (distribution) /sbin/$(INSTALLKERNEL) or'
 371   @echo '                    install to $$(INSTALL_PATH) and run lilo'
 372   @echo '  *_defconfig     - Select default config from arch/$(ARCH)/configs'
 373   @echo ''
 374   @echo '  Targets with <dt> embed a device tree blob inside the image'
 375   @echo '  These targets support board with firmware that does not'
 376   @echo '  support passing a device tree directly.  Replace <dt> with the'
 377   @echo '  name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
 378   @echo '  (minus the .dts extension).'
 379 endef
 380
 381 install:
 382         $(Q)$(MAKE) $(build)=$(boot) install
 383
 384 vdso_install:
 385 ifeq ($(CONFIG_PPC64),y)
 386         $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
 387 endif
 388         $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
 389
 390 archclean:
 391         $(Q)$(MAKE) $(clean)=$(boot)
 392
 393 archprepare: checkbin
 394
 395 # Use the file '.tmp_gas_check' for binutils tests, as gas won't output
 396 # to stdout and these checks are run even on install targets.
 397 TOUT    := .tmp_gas_check
 398
 399 # Check gcc and binutils versions:
 400 # - gcc-3.4 and binutils-2.14 are a fatal combination
 401 # - Require gcc 4.0 or above on 64-bit
 402 # - gcc-4.2.0 has issues compiling modules on 64-bit
 403 checkbin:
 404         @if test "$(cc-name)" != "clang" \
 405             && test "$(cc-version)" = "0304" ; then \
 406                 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
 407                         echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
 408                         echo 'correctly with gcc-3.4 and your version of binutils.'; \
 409                         echo '*** Please upgrade your binutils or downgrade your gcc'; \
 410                         false; \
 411                 fi ; \
 412         fi
 413         @if test "$(cc-name)" != "clang" \
 414             && test "$(cc-version)" -lt "0400" \
 415             && test "x${CONFIG_PPC64}" = "xy" ; then \
 416                 echo -n "Sorry, GCC v4.0 or above is required to build " ; \
 417                 echo "the 64-bit powerpc kernel." ; \
 418                 false ; \
 419         fi
 420         @if test "$(cc-name)" != "clang" \
 421             && test "$(cc-fullversion)" = "040200" \
 422             && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
 423                 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
 424                 echo 'kernel with modules enabled.' ; \
 425                 echo -n '*** Please use a different GCC version or ' ; \
 426                 echo 'disable kernel modules' ; \
 427                 false ; \
 428         fi
 429         @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \
 430             && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \
 431                 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \
 432                 echo 'in some circumstances.' ; \
 433                 echo -n '*** Please use a different binutils version.' ; \
 434                 false ; \
 435         fi
 436
 437
 438 CLEAN_FILES += $(TOUT)
 439