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