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 CROSS32AR       := GNUTARGET=elf32-powerpc $(AR)
  27 endif
  28 endif
  29
  30 export CROSS32CC CROSS32AR
  31
  32 ifeq ($(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              := $(NM) --synthetic
  43 endif
  44 endif
  45
  46 ifeq ($(CONFIG_PPC64),y)
  47 ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
  48 OLDARCH := ppc64le
  49 else
  50 OLDARCH := ppc64
  51 endif
  52 else
  53 ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
  54 OLDARCH := ppcle
  55 else
  56 OLDARCH := ppc
  57 endif
  58 endif
  59
  60 # It seems there are times we use this Makefile without
  61 # including the config file, but this replicates the old behaviour
  62 ifeq ($(CONFIG_WORD_SIZE),)
  63 CONFIG_WORD_SIZE := 32
  64 endif
  65
  66 UTS_MACHINE := $(OLDARCH)
  67
  68 ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
  69 override LD     += -EL
  70 override CROSS32AS += -mlittle-endian
  71 LDEMULATION     := lppc
  72 GNUTARGET       := powerpcle
  73 MULTIPLEWORD    := -mno-multiple
  74 KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect)
  75 else
  76 override LD     += -EB
  77 LDEMULATION     := ppc
  78 GNUTARGET       := powerpc
  79 MULTIPLEWORD    := -mmultiple
  80 endif
  81
  82 cflags-$(CONFIG_CPU_BIG_ENDIAN)         += $(call cc-option,-mbig-endian)
  83 cflags-$(CONFIG_CPU_LITTLE_ENDIAN)      += -mlittle-endian
  84 ifneq ($(cc-name),clang)
  85   cflags-$(CONFIG_CPU_LITTLE_ENDIAN)    += -mno-strict-align
  86 endif
  87
  88 aflags-$(CONFIG_CPU_BIG_ENDIAN)         += $(call cc-option,-mbig-endian)
  89 aflags-$(CONFIG_CPU_LITTLE_ENDIAN)      += -mlittle-endian
  90
  91 ifeq ($(HAS_BIARCH),y)
  92 override AS     += -a$(CONFIG_WORD_SIZE)
  93 override LD     += -m elf$(CONFIG_WORD_SIZE)$(LDEMULATION)
  94 override CC     += -m$(CONFIG_WORD_SIZE)
  95 override AR     := GNUTARGET=elf$(CONFIG_WORD_SIZE)-$(GNUTARGET) $(AR)
  96 endif
  97
  98 LDFLAGS_vmlinux-y := -Bstatic
  99 LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
 100 LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y)
 101
 102 ifeq ($(CONFIG_PPC64),y)
 103 ifeq ($(call cc-option-yn,-mcmodel=medium),y)
 104         # -mcmodel=medium breaks modules because it uses 32bit offsets from
 105         # the TOC pointer to create pointers where possible. Pointers into the
 106         # percpu data area are created by this method.
 107         #
 108         # The kernel module loader relocates the percpu data section from the
 109         # original location (starting with 0xd...) to somewhere in the base
 110         # kernel percpu data space (starting with 0xc...). We need a full
 111         # 64bit relocation for this to work, hence -mcmodel=large.
 112         KBUILD_CFLAGS_MODULE += -mcmodel=large
 113 else
 114         export NO_MINIMAL_TOC := -mno-minimal-toc
 115 endif
 116 endif
 117
 118 CFLAGS-$(CONFIG_PPC64)  := $(call cc-option,-mtraceback=no)
 119 ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
 120 CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc))
 121 AFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mabi=elfv2)
 122 else
 123 CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mcall-aixdesc)
 124 endif
 125 CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc))
 126 CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mno-pointers-to-nested-functions)
 127 CFLAGS-$(CONFIG_PPC32)  := -ffixed-r2 $(MULTIPLEWORD)
 128
 129 ifeq ($(CONFIG_PPC_BOOK3S_64),y)
 130 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,-mtune=power4)
 131 else
 132 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
 133 endif
 134
 135 ifdef CONFIG_MPROFILE_KERNEL
 136     ifeq ($(shell $(srctree)/arch/powerpc/scripts/gcc-check-mprofile-kernel.sh $(CC) -I$(srctree)/include -D__KERNEL__),OK)
 137         CC_FLAGS_FTRACE := -pg -mprofile-kernel
 138         KBUILD_CPPFLAGS += -DCC_USING_MPROFILE_KERNEL
 139     else
 140         # If the user asked for mprofile-kernel but the toolchain doesn't
 141         # support it, emit a warning and deliberately break the build later
 142         # with mprofile-kernel-not-supported. We would prefer to make this an
 143         # error right here, but then the user would never be able to run
 144         # oldconfig to change their configuration.
 145         $(warning Compiler does not support mprofile-kernel, set CONFIG_DISABLE_MPROFILE_KERNEL)
 146         CC_FLAGS_FTRACE := -mprofile-kernel-not-supported
 147     endif
 148 endif
 149
 150 CFLAGS-$(CONFIG_CELL_CPU) += $(call cc-option,-mcpu=cell)
 151 CFLAGS-$(CONFIG_POWER4_CPU) += $(call cc-option,-mcpu=power4)
 152 CFLAGS-$(CONFIG_POWER5_CPU) += $(call cc-option,-mcpu=power5)
 153 CFLAGS-$(CONFIG_POWER6_CPU) += $(call cc-option,-mcpu=power6)
 154 CFLAGS-$(CONFIG_POWER7_CPU) += $(call cc-option,-mcpu=power7)
 155 CFLAGS-$(CONFIG_POWER8_CPU) += $(call cc-option,-mcpu=power8)
 156
 157 # Altivec option not allowed with e500mc64 in GCC.
 158 ifeq ($(CONFIG_ALTIVEC),y)
 159 E5500_CPU := -mcpu=powerpc64
 160 else
 161 E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
 162 endif
 163 CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU)
 164 CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
 165
 166 ifeq ($(CONFIG_PPC32),y)
 167 ifeq ($(CONFIG_PPC_E500MC),y)
 168 CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc)
 169 else
 170 CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc)
 171 endif
 172 endif
 173
 174 asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
 175
 176 KBUILD_CPPFLAGS += -Iarch/$(ARCH) $(asinstr)
 177 KBUILD_AFLAGS   += -Iarch/$(ARCH) $(AFLAGS-y)
 178 KBUILD_CFLAGS   += $(call cc-option,-msoft-float)
 179 KBUILD_CFLAGS   += -pipe -Iarch/$(ARCH) $(CFLAGS-y)
 180 CPP             = $(CC) -E $(KBUILD_CFLAGS)
 181
 182 CHECKFLAGS      += -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__
 183 ifdef CONFIG_CPU_BIG_ENDIAN
 184 CHECKFLAGS      += -D__BIG_ENDIAN__
 185 else
 186 CHECKFLAGS      += -D__LITTLE_ENDIAN__
 187 endif
 188
 189 KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
 190
 191 ifeq ($(CONFIG_476FPE_ERR46),y)
 192         KBUILD_LDFLAGS_MODULE += --ppc476-workaround \
 193                 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds
 194 endif
 195
 196 # No AltiVec or VSX instructions when building kernel
 197 KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
 198 KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
 199
 200 # No SPE instruction when building kernel
 201 # (We use all available options to help semi-broken compilers)
 202 KBUILD_CFLAGS += $(call cc-option,-mno-spe)
 203 KBUILD_CFLAGS += $(call cc-option,-mspe=no)
 204
 205 # Enable unit-at-a-time mode when possible. It shrinks the
 206 # kernel considerably.
 207 KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
 208
 209 # FIXME: the module load should be taught about the additional relocs
 210 # generated by this.
 211 # revert to pre-gcc-4.4 behaviour of .eh_frame
 212 KBUILD_CFLAGS   += $(call cc-option,-fno-dwarf2-cfi-asm)
 213
 214 # Never use string load/store instructions as they are
 215 # often slow when they are implemented at all
 216 KBUILD_CFLAGS           += $(call cc-option,-mno-string)
 217
 218 ifeq ($(CONFIG_6xx),y)
 219 KBUILD_CFLAGS           += -mcpu=powerpc
 220 endif
 221
 222 # Work around a gcc code-gen bug with -fno-omit-frame-pointer.
 223 ifeq ($(CONFIG_FUNCTION_TRACER),y)
 224 KBUILD_CFLAGS           += -mno-sched-epilog
 225 endif
 226
 227 cpu-as-$(CONFIG_4xx)            += -Wa,-m405
 228 cpu-as-$(CONFIG_ALTIVEC)        += $(call as-option,-Wa$(comma)-maltivec)
 229 cpu-as-$(CONFIG_E200)           += -Wa,-me200
 230
 231 KBUILD_AFLAGS += $(cpu-as-y)
 232 KBUILD_CFLAGS += $(cpu-as-y)
 233
 234 KBUILD_AFLAGS += $(aflags-y)
 235 KBUILD_CFLAGS += $(cflags-y)
 236
 237 head-y                          := arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o
 238 head-$(CONFIG_8xx)              := arch/powerpc/kernel/head_8xx.o
 239 head-$(CONFIG_40x)              := arch/powerpc/kernel/head_40x.o
 240 head-$(CONFIG_44x)              := arch/powerpc/kernel/head_44x.o
 241 head-$(CONFIG_FSL_BOOKE)        := arch/powerpc/kernel/head_fsl_booke.o
 242
 243 head-$(CONFIG_PPC64)            += arch/powerpc/kernel/entry_64.o
 244 head-$(CONFIG_PPC_FPU)          += arch/powerpc/kernel/fpu.o
 245 head-$(CONFIG_ALTIVEC)          += arch/powerpc/kernel/vector.o
 246 head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE)  += arch/powerpc/kernel/prom_init.o
 247
 248 core-y                          += arch/powerpc/kernel/ \
 249                                    arch/powerpc/mm/ \
 250                                    arch/powerpc/lib/ \
 251                                    arch/powerpc/sysdev/ \
 252                                    arch/powerpc/platforms/ \
 253                                    arch/powerpc/math-emu/ \
 254                                    arch/powerpc/crypto/ \
 255                                    arch/powerpc/net/
 256 core-$(CONFIG_XMON)             += arch/powerpc/xmon/
 257 core-$(CONFIG_KVM)              += arch/powerpc/kvm/
 258 core-$(CONFIG_PERF_EVENTS)      += arch/powerpc/perf/
 259
 260 drivers-$(CONFIG_OPROFILE)      += arch/powerpc/oprofile/
 261
 262 # Default to zImage, override when needed
 263 all: zImage
 264
 265 # With make 3.82 we cannot mix normal and wildcard targets
 266 BOOT_TARGETS1 := zImage zImage.initrd uImage
 267 BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
 268
 269 PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
 270
 271 boot := arch/$(ARCH)/boot
 272
 273 ifeq ($(CONFIG_RELOCATABLE),y)
 274 quiet_cmd_relocs_check = CALL    $<
 275       cmd_relocs_check = $(CONFIG_SHELL) $< "$(OBJDUMP)" "$(obj)/vmlinux"
 276
 277 PHONY += relocs_check
 278 relocs_check: arch/powerpc/relocs_check.sh vmlinux
 279         $(call cmd,relocs_check)
 280
 281 zImage: relocs_check
 282 endif
 283
 284 $(BOOT_TARGETS1): vmlinux
 285         $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 286 $(BOOT_TARGETS2): vmlinux
 287         $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 288
 289
 290 bootwrapper_install:
 291         $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 292
 293 %.dtb: scripts
 294         $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 295
 296 # Used to create 'merged defconfigs'
 297 # To use it $(call) it with the first argument as the base defconfig
 298 # and the second argument as a space separated list of .config files to merge,
 299 # without the .config suffix.
 300 define merge_into_defconfig
 301         $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \
 302                 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \
 303                 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config)
 304         +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig
 305 endef
 306
 307 PHONY += pseries_le_defconfig
 308 pseries_le_defconfig:
 309         $(call merge_into_defconfig,pseries_defconfig,le)
 310
 311 PHONY += ppc64le_defconfig
 312 ppc64le_defconfig:
 313         $(call merge_into_defconfig,ppc64_defconfig,le)
 314
 315 PHONY += mpc85xx_defconfig
 316 mpc85xx_defconfig:
 317         $(call merge_into_defconfig,mpc85xx_basic_defconfig,\
 318                 85xx-32bit 85xx-hw fsl-emb-nonhw)
 319
 320 PHONY += mpc85xx_smp_defconfig
 321 mpc85xx_smp_defconfig:
 322         $(call merge_into_defconfig,mpc85xx_basic_defconfig,\
 323                 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)
 324
 325 PHONY += corenet32_smp_defconfig
 326 corenet32_smp_defconfig:
 327         $(call merge_into_defconfig,corenet_basic_defconfig,\
 328                 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)
 329
 330 PHONY += corenet64_smp_defconfig
 331 corenet64_smp_defconfig:
 332         $(call merge_into_defconfig,corenet_basic_defconfig,\
 333                 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw)
 334
 335 PHONY += mpc86xx_defconfig
 336 mpc86xx_defconfig:
 337         $(call merge_into_defconfig,mpc86xx_basic_defconfig,\
 338                 86xx-hw fsl-emb-nonhw)
 339
 340 PHONY += mpc86xx_smp_defconfig
 341 mpc86xx_smp_defconfig:
 342         $(call merge_into_defconfig,mpc86xx_basic_defconfig,\
 343                 86xx-smp 86xx-hw fsl-emb-nonhw)
 344
 345 define archhelp
 346   @echo '* zImage          - Build default images selected by kernel config'
 347   @echo '  zImage.*        - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
 348   @echo '  uImage          - U-Boot native image format'
 349   @echo '  cuImage.<dt>    - Backwards compatible U-Boot image for older'
 350   @echo '                    versions which do not support device trees'
 351   @echo '  dtbImage.<dt>   - zImage with an embedded device tree blob'
 352   @echo '  simpleImage.<dt> - Firmware independent image.'
 353   @echo '  treeImage.<dt>  - Support for older IBM 4xx firmware (not U-Boot)'
 354   @echo '  install         - Install kernel using'
 355   @echo '                    (your) ~/bin/$(INSTALLKERNEL) or'
 356   @echo '                    (distribution) /sbin/$(INSTALLKERNEL) or'
 357   @echo '                    install to $$(INSTALL_PATH) and run lilo'
 358   @echo '  *_defconfig     - Select default config from arch/$(ARCH)/configs'
 359   @echo ''
 360   @echo '  Targets with <dt> embed a device tree blob inside the image'
 361   @echo '  These targets support board with firmware that does not'
 362   @echo '  support passing a device tree directly.  Replace <dt> with the'
 363   @echo '  name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
 364   @echo '  (minus the .dts extension).'
 365 endef
 366
 367 install:
 368         $(Q)$(MAKE) $(build)=$(boot) install
 369
 370 vdso_install:
 371 ifeq ($(CONFIG_PPC64),y)
 372         $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
 373 endif
 374         $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
 375
 376 archclean:
 377         $(Q)$(MAKE) $(clean)=$(boot)
 378
 379 archprepare: checkbin
 380
 381 # Use the file '.tmp_gas_check' for binutils tests, as gas won't output
 382 # to stdout and these checks are run even on install targets.
 383 TOUT    := .tmp_gas_check
 384
 385 # Check gcc and binutils versions:
 386 # - gcc-3.4 and binutils-2.14 are a fatal combination
 387 # - Require gcc 4.0 or above on 64-bit
 388 # - gcc-4.2.0 has issues compiling modules on 64-bit
 389 checkbin:
 390         @if test "$(cc-name)" != "clang" \
 391             && test "$(cc-version)" = "0304" ; then \
 392                 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
 393                         echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
 394                         echo 'correctly with gcc-3.4 and your version of binutils.'; \
 395                         echo '*** Please upgrade your binutils or downgrade your gcc'; \
 396                         false; \
 397                 fi ; \
 398         fi
 399         @if test "$(cc-name)" != "clang" \
 400             && test "$(cc-version)" -lt "0400" \
 401             && test "x${CONFIG_PPC64}" = "xy" ; then \
 402                 echo -n "Sorry, GCC v4.0 or above is required to build " ; \
 403                 echo "the 64-bit powerpc kernel." ; \
 404                 false ; \
 405         fi
 406         @if test "$(cc-name)" != "clang" \
 407             && test "$(cc-fullversion)" = "040200" \
 408             && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
 409                 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
 410                 echo 'kernel with modules enabled.' ; \
 411                 echo -n '*** Please use a different GCC version or ' ; \
 412                 echo 'disable kernel modules' ; \
 413                 false ; \
 414         fi
 415         @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \
 416             && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \
 417                 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \
 418                 echo 'in some circumstances.' ; \
 419                 echo -n '*** Please use a different binutils version.' ; \
 420                 false ; \
 421         fi
 422
 423
 424 CLEAN_FILES += $(TOUT)
 425