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 ($(CROSS32_COMPILE),)
  22 ifdef CONFIG_PPC32
  23 # These options will be overridden by any -mcpu option that the CPU
  24 # or platform code sets later on the command line, but they are needed
  25 # to set a sane 32-bit cpu target for the 64-bit cross compiler which
  26 # may default to the wrong ISA.
  27 KBUILD_CFLAGS           += -mcpu=powerpc
  28 KBUILD_AFLAGS           += -mcpu=powerpc
  29 endif
  30 endif
  31 endif
  32
  33 ifeq ($(CROSS_COMPILE),)
  34 KBUILD_DEFCONFIG := $(shell uname -m)_defconfig
  35 else
  36 KBUILD_DEFCONFIG := ppc64_defconfig
  37 endif
  38
  39 ifeq ($(CONFIG_PPC64),y)
  40 new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
  41
  42 ifeq ($(new_nm),y)
  43 NM              := $(NM) --synthetic
  44 endif
  45 endif
  46
  47 # BITS is used as extension for files which are available in a 32 bit
  48 # and a 64 bit version to simplify shared Makefiles.
  49 # e.g.: obj-y += foo_$(BITS).o
  50 export BITS
  51
  52 ifdef CONFIG_PPC64
  53         BITS := 64
  54 else
  55         BITS := 32
  56 endif
  57
  58 machine-y = ppc
  59 machine-$(CONFIG_PPC64) += 64
  60 machine-$(CONFIG_CPU_LITTLE_ENDIAN) += le
  61 UTS_MACHINE := $(subst $(space),,$(machine-y))
  62
  63 # XXX This needs to be before we override LD below
  64 ifdef CONFIG_PPC32
  65 KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
  66 else
  67 KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/powerpc/kernel/module.lds
  68 ifeq ($(call ld-ifversion, -ge, 225000000, y),y)
  69 # Have the linker provide sfpr if possible.
  70 # There is a corresponding test in arch/powerpc/lib/Makefile
  71 KBUILD_LDFLAGS_MODULE += --save-restore-funcs
  72 else
  73 KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
  74 endif
  75 endif
  76
  77 ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
  78 KBUILD_CFLAGS   += -mlittle-endian
  79 LDFLAGS         += -EL
  80 LDEMULATION     := lppc
  81 GNUTARGET       := powerpcle
  82 MULTIPLEWORD    := -mno-multiple
  83 KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect)
  84 else
  85 KBUILD_CFLAGS += $(call cc-option,-mbig-endian)
  86 LDFLAGS         += -EB
  87 LDEMULATION     := ppc
  88 GNUTARGET       := powerpc
  89 MULTIPLEWORD    := -mmultiple
  90 endif
  91
  92 ifdef CONFIG_PPC64
  93 cflags-$(CONFIG_CPU_BIG_ENDIAN)         += $(call cc-option,-mabi=elfv1)
  94 cflags-$(CONFIG_CPU_BIG_ENDIAN)         += $(call cc-option,-mcall-aixdesc)
  95 aflags-$(CONFIG_CPU_BIG_ENDIAN)         += $(call cc-option,-mabi=elfv1)
  96 aflags-$(CONFIG_CPU_LITTLE_ENDIAN)      += -mabi=elfv2
  97 endif
  98
  99 ifneq ($(cc-name),clang)
 100   cflags-$(CONFIG_CPU_LITTLE_ENDIAN)    += -mno-strict-align
 101 endif
 102
 103 cflags-$(CONFIG_CPU_BIG_ENDIAN)         += $(call cc-option,-mbig-endian)
 104 cflags-$(CONFIG_CPU_LITTLE_ENDIAN)      += -mlittle-endian
 105 aflags-$(CONFIG_CPU_BIG_ENDIAN)         += $(call cc-option,-mbig-endian)
 106 aflags-$(CONFIG_CPU_LITTLE_ENDIAN)      += -mlittle-endian
 107
 108 ifeq ($(HAS_BIARCH),y)
 109 KBUILD_CFLAGS   += -m$(BITS)
 110 KBUILD_AFLAGS   += -m$(BITS) -Wl,-a$(BITS)
 111 LDFLAGS         += -m elf$(BITS)$(LDEMULATION)
 112 KBUILD_ARFLAGS  += --target=elf$(BITS)-$(GNUTARGET)
 113 endif
 114
 115 LDFLAGS_vmlinux-y := -Bstatic
 116 LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
 117 LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y)
 118 LDFLAGS_vmlinux += $(call ld-option,--orphan-handling=warn)
 119
 120 ifeq ($(CONFIG_PPC64),y)
 121 ifeq ($(call cc-option-yn,-mcmodel=medium),y)
 122         # -mcmodel=medium breaks modules because it uses 32bit offsets from
 123         # the TOC pointer to create pointers where possible. Pointers into the
 124         # percpu data area are created by this method.
 125         #
 126         # The kernel module loader relocates the percpu data section from the
 127         # original location (starting with 0xd...) to somewhere in the base
 128         # kernel percpu data space (starting with 0xc...). We need a full
 129         # 64bit relocation for this to work, hence -mcmodel=large.
 130         KBUILD_CFLAGS_MODULE += -mcmodel=large
 131 else
 132         export NO_MINIMAL_TOC := -mno-minimal-toc
 133 endif
 134 endif
 135
 136 CFLAGS-$(CONFIG_PPC64)  := $(call cc-option,-mtraceback=no)
 137 ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
 138 CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc))
 139 AFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mabi=elfv2)
 140 else
 141 CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mabi=elfv1)
 142 CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mcall-aixdesc)
 143 AFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mabi=elfv1)
 144 endif
 145 CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc))
 146 CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mno-pointers-to-nested-functions)
 147
 148 CFLAGS-$(CONFIG_PPC32)  := -ffixed-r2 $(MULTIPLEWORD)
 149 CFLAGS-$(CONFIG_PPC32)  += $(call cc-option,-mno-readonly-in-sdata)
 150
 151 ifeq ($(CONFIG_PPC_BOOK3S_64),y)
 152 ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
 153 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8
 154 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power9,-mtune=power8)
 155 else
 156 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5))
 157 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mcpu=power5,-mcpu=power4)
 158 endif
 159 else
 160 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
 161 endif
 162
 163 ifdef CONFIG_MPROFILE_KERNEL
 164         CC_FLAGS_FTRACE := -pg -mprofile-kernel
 165 endif
 166
 167 CFLAGS-$(CONFIG_CELL_CPU) += $(call cc-option,-mcpu=cell)
 168 CFLAGS-$(CONFIG_POWER5_CPU) += $(call cc-option,-mcpu=power5)
 169 CFLAGS-$(CONFIG_POWER6_CPU) += $(call cc-option,-mcpu=power6)
 170 CFLAGS-$(CONFIG_POWER7_CPU) += $(call cc-option,-mcpu=power7)
 171 CFLAGS-$(CONFIG_POWER8_CPU) += $(call cc-option,-mcpu=power8)
 172 CFLAGS-$(CONFIG_POWER9_CPU) += $(call cc-option,-mcpu=power9)
 173 CFLAGS-$(CONFIG_PPC_8xx) += $(call cc-option,-mcpu=860)
 174
 175 # Altivec option not allowed with e500mc64 in GCC.
 176 ifeq ($(CONFIG_ALTIVEC),y)
 177 E5500_CPU := -mcpu=powerpc64
 178 else
 179 E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
 180 endif
 181 CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU)
 182 CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
 183
 184 ifeq ($(CONFIG_PPC32),y)
 185 ifeq ($(CONFIG_PPC_E500MC),y)
 186 CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc)
 187 else
 188 CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc)
 189 endif
 190 endif
 191
 192 asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
 193
 194 KBUILD_CPPFLAGS += -Iarch/$(ARCH) $(asinstr)
 195 KBUILD_AFLAGS   += -Iarch/$(ARCH) $(AFLAGS-y)
 196 KBUILD_CFLAGS   += $(call cc-option,-msoft-float)
 197 KBUILD_CFLAGS   += -pipe -Iarch/$(ARCH) $(CFLAGS-y)
 198 CPP             = $(CC) -E $(KBUILD_CFLAGS)
 199
 200 CHECKFLAGS      += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__
 201 ifdef CONFIG_CPU_BIG_ENDIAN
 202 CHECKFLAGS      += -D__BIG_ENDIAN__
 203 else
 204 CHECKFLAGS      += -D__LITTLE_ENDIAN__
 205 endif
 206
 207 ifeq ($(CONFIG_476FPE_ERR46),y)
 208         KBUILD_LDFLAGS_MODULE += --ppc476-workaround \
 209                 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds
 210 endif
 211
 212 # No AltiVec or VSX instructions when building kernel
 213 KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
 214 KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
 215
 216 # No SPE instruction when building kernel
 217 # (We use all available options to help semi-broken compilers)
 218 KBUILD_CFLAGS += $(call cc-option,-mno-spe)
 219 KBUILD_CFLAGS += $(call cc-option,-mspe=no)
 220
 221 # Enable unit-at-a-time mode when possible. It shrinks the
 222 # kernel considerably.
 223 KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
 224
 225 # FIXME: the module load should be taught about the additional relocs
 226 # generated by this.
 227 # revert to pre-gcc-4.4 behaviour of .eh_frame
 228 KBUILD_CFLAGS   += $(call cc-option,-fno-dwarf2-cfi-asm)
 229
 230 # Never use string load/store instructions as they are
 231 # often slow when they are implemented at all
 232 KBUILD_CFLAGS           += $(call cc-option,-mno-string)
 233
 234 ifeq ($(CONFIG_6xx),y)
 235 KBUILD_CFLAGS           += -mcpu=powerpc
 236 endif
 237
 238 # Work around a gcc code-gen bug with -fno-omit-frame-pointer.
 239 ifeq ($(CONFIG_FUNCTION_TRACER),y)
 240 KBUILD_CFLAGS           += -mno-sched-epilog
 241 endif
 242
 243 cpu-as-$(CONFIG_4xx)            += -Wa,-m405
 244 cpu-as-$(CONFIG_ALTIVEC)        += $(call as-option,-Wa$(comma)-maltivec)
 245 cpu-as-$(CONFIG_E200)           += -Wa,-me200
 246 cpu-as-$(CONFIG_E500)           += -Wa,-me500
 247 cpu-as-$(CONFIG_PPC_BOOK3S_64)  += -Wa,-mpower4
 248 cpu-as-$(CONFIG_PPC_E500MC)     += $(call as-option,-Wa$(comma)-me500mc)
 249
 250 KBUILD_AFLAGS += $(cpu-as-y)
 251 KBUILD_CFLAGS += $(cpu-as-y)
 252
 253 KBUILD_AFLAGS += $(aflags-y)
 254 KBUILD_CFLAGS += $(cflags-y)
 255
 256 head-y                          := arch/powerpc/kernel/head_$(BITS).o
 257 head-$(CONFIG_PPC_8xx)          := arch/powerpc/kernel/head_8xx.o
 258 head-$(CONFIG_40x)              := arch/powerpc/kernel/head_40x.o
 259 head-$(CONFIG_44x)              := arch/powerpc/kernel/head_44x.o
 260 head-$(CONFIG_FSL_BOOKE)        := arch/powerpc/kernel/head_fsl_booke.o
 261
 262 head-$(CONFIG_PPC64)            += arch/powerpc/kernel/entry_64.o
 263 head-$(CONFIG_PPC_FPU)          += arch/powerpc/kernel/fpu.o
 264 head-$(CONFIG_ALTIVEC)          += arch/powerpc/kernel/vector.o
 265 head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE)  += arch/powerpc/kernel/prom_init.o
 266
 267 core-y                          += arch/powerpc/kernel/ \
 268                                    arch/powerpc/mm/ \
 269                                    arch/powerpc/lib/ \
 270                                    arch/powerpc/sysdev/ \
 271                                    arch/powerpc/platforms/ \
 272                                    arch/powerpc/math-emu/ \
 273                                    arch/powerpc/crypto/ \
 274                                    arch/powerpc/net/
 275 core-$(CONFIG_XMON)             += arch/powerpc/xmon/
 276 core-$(CONFIG_KVM)              += arch/powerpc/kvm/
 277 core-$(CONFIG_PERF_EVENTS)      += arch/powerpc/perf/
 278 core-$(CONFIG_KEXEC_FILE)       += arch/powerpc/purgatory/
 279
 280 drivers-$(CONFIG_OPROFILE)      += arch/powerpc/oprofile/
 281
 282 # Default to zImage, override when needed
 283 all: zImage
 284
 285 # With make 3.82 we cannot mix normal and wildcard targets
 286 BOOT_TARGETS1 := zImage zImage.initrd uImage
 287 BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
 288
 289 PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
 290
 291 boot := arch/$(ARCH)/boot
 292
 293 $(BOOT_TARGETS1): vmlinux
 294         $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 295 $(BOOT_TARGETS2): vmlinux
 296         $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 297
 298
 299 bootwrapper_install:
 300         $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 301
 302 %.dtb: scripts
 303         $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 304
 305 # Used to create 'merged defconfigs'
 306 # To use it $(call) it with the first argument as the base defconfig
 307 # and the second argument as a space separated list of .config files to merge,
 308 # without the .config suffix.
 309 define merge_into_defconfig
 310         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
 311                 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \
 312                 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config)
 313         +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
 314 endef
 315
 316 PHONY += pseries_le_defconfig
 317 pseries_le_defconfig:
 318         $(call merge_into_defconfig,pseries_defconfig,le)
 319
 320 PHONY += ppc64le_defconfig
 321 ppc64le_defconfig:
 322         $(call merge_into_defconfig,ppc64_defconfig,le)
 323
 324 PHONY += powernv_be_defconfig
 325 powernv_be_defconfig:
 326         $(call merge_into_defconfig,powernv_defconfig,be)
 327
 328 PHONY += mpc85xx_defconfig
 329 mpc85xx_defconfig:
 330         $(call merge_into_defconfig,mpc85xx_basic_defconfig,\
 331                 85xx-32bit 85xx-hw fsl-emb-nonhw)
 332
 333 PHONY += mpc85xx_smp_defconfig
 334 mpc85xx_smp_defconfig:
 335         $(call merge_into_defconfig,mpc85xx_basic_defconfig,\
 336                 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)
 337
 338 PHONY += corenet32_smp_defconfig
 339 corenet32_smp_defconfig:
 340         $(call merge_into_defconfig,corenet_basic_defconfig,\
 341                 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa)
 342
 343 PHONY += corenet64_smp_defconfig
 344 corenet64_smp_defconfig:
 345         $(call merge_into_defconfig,corenet_basic_defconfig,\
 346                 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa)
 347
 348 PHONY += mpc86xx_defconfig
 349 mpc86xx_defconfig:
 350         $(call merge_into_defconfig,mpc86xx_basic_defconfig,\
 351                 86xx-hw fsl-emb-nonhw)
 352
 353 PHONY += mpc86xx_smp_defconfig
 354 mpc86xx_smp_defconfig:
 355         $(call merge_into_defconfig,mpc86xx_basic_defconfig,\
 356                 86xx-smp 86xx-hw fsl-emb-nonhw)
 357
 358 define archhelp
 359   @echo '* zImage          - Build default images selected by kernel config'
 360   @echo '  zImage.*        - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
 361   @echo '  uImage          - U-Boot native image format'
 362   @echo '  cuImage.<dt>    - Backwards compatible U-Boot image for older'
 363   @echo '                    versions which do not support device trees'
 364   @echo '  dtbImage.<dt>   - zImage with an embedded device tree blob'
 365   @echo '  simpleImage.<dt> - Firmware independent image.'
 366   @echo '  treeImage.<dt>  - Support for older IBM 4xx firmware (not U-Boot)'
 367   @echo '  install         - Install kernel using'
 368   @echo '                    (your) ~/bin/$(INSTALLKERNEL) or'
 369   @echo '                    (distribution) /sbin/$(INSTALLKERNEL) or'
 370   @echo '                    install to $$(INSTALL_PATH) and run lilo'
 371   @echo '  *_defconfig     - Select default config from arch/$(ARCH)/configs'
 372   @echo ''
 373   @echo '  Targets with <dt> embed a device tree blob inside the image'
 374   @echo '  These targets support board with firmware that does not'
 375   @echo '  support passing a device tree directly.  Replace <dt> with the'
 376   @echo '  name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
 377   @echo '  (minus the .dts extension).'
 378 endef
 379
 380 install:
 381         $(Q)$(MAKE) $(build)=$(boot) install
 382
 383 vdso_install:
 384 ifeq ($(CONFIG_PPC64),y)
 385         $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
 386 endif
 387         $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
 388
 389 archclean:
 390         $(Q)$(MAKE) $(clean)=$(boot)
 391
 392 archprepare: checkbin
 393
 394 # Use the file '.tmp_gas_check' for binutils tests, as gas won't output
 395 # to stdout and these checks are run even on install targets.
 396 TOUT    := .tmp_gas_check
 397
 398 # Check gcc and binutils versions:
 399 # - gcc-3.4 and binutils-2.14 are a fatal combination
 400 # - Require gcc 4.0 or above on 64-bit
 401 # - gcc-4.2.0 has issues compiling modules on 64-bit
 402 checkbin:
 403         @if test "$(cc-name)" != "clang" \
 404             && test "$(cc-version)" = "0304" ; then \
 405                 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
 406                         echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
 407                         echo 'correctly with gcc-3.4 and your version of binutils.'; \
 408                         echo '*** Please upgrade your binutils or downgrade your gcc'; \
 409                         false; \
 410                 fi ; \
 411         fi
 412         @if test "$(cc-name)" != "clang" \
 413             && test "$(cc-version)" -lt "0400" \
 414             && test "x${CONFIG_PPC64}" = "xy" ; then \
 415                 echo -n "Sorry, GCC v4.0 or above is required to build " ; \
 416                 echo "the 64-bit powerpc kernel." ; \
 417                 false ; \
 418         fi
 419         @if test "$(cc-name)" != "clang" \
 420             && test "$(cc-fullversion)" = "040200" \
 421             && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
 422                 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
 423                 echo 'kernel with modules enabled.' ; \
 424                 echo -n '*** Please use a different GCC version or ' ; \
 425                 echo 'disable kernel modules' ; \
 426                 false ; \
 427         fi
 428         @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \
 429             && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \
 430                 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \
 431                 echo 'in some circumstances.' ; \
 432                 echo -n '*** Please use a different binutils version.' ; \
 433                 false ; \
 434         fi
 435
 436
 437 CLEAN_FILES += $(TOUT)
 438