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 CC     += -mlittle-endian -mno-strict-align
  70 override AS     += -mlittle-endian
  71 override LD     += -EL
  72 override CROSS32CC += -mlittle-endian
  73 override CROSS32AS += -mlittle-endian
  74 LDEMULATION     := lppc
  75 GNUTARGET       := powerpcle
  76 MULTIPLEWORD    := -mno-multiple
  77 KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect)
  78 else
  79 ifeq ($(call cc-option-yn,-mbig-endian),y)
  80 override CC     += -mbig-endian
  81 override AS     += -mbig-endian
  82 endif
  83 override LD     += -EB
  84 LDEMULATION     := ppc
  85 GNUTARGET       := powerpc
  86 MULTIPLEWORD    := -mmultiple
  87 endif
  88
  89 ifeq ($(HAS_BIARCH),y)
  90 override AS     += -a$(CONFIG_WORD_SIZE)
  91 override LD     += -m elf$(CONFIG_WORD_SIZE)$(LDEMULATION)
  92 override CC     += -m$(CONFIG_WORD_SIZE)
  93 override AR     := GNUTARGET=elf$(CONFIG_WORD_SIZE)-$(GNUTARGET) $(AR)
  94 endif
  95
  96 LDFLAGS_vmlinux-y := -Bstatic
  97 LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
  98 LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y)
  99
 100 ifeq ($(CONFIG_PPC64),y)
 101 ifeq ($(call cc-option-yn,-mcmodel=medium),y)
 102         # -mcmodel=medium breaks modules because it uses 32bit offsets from
 103         # the TOC pointer to create pointers where possible. Pointers into the
 104         # percpu data area are created by this method.
 105         #
 106         # The kernel module loader relocates the percpu data section from the
 107         # original location (starting with 0xd...) to somewhere in the base
 108         # kernel percpu data space (starting with 0xc...). We need a full
 109         # 64bit relocation for this to work, hence -mcmodel=large.
 110         KBUILD_CFLAGS_MODULE += -mcmodel=large
 111 else
 112         export NO_MINIMAL_TOC := -mno-minimal-toc
 113 endif
 114 endif
 115
 116 CFLAGS-$(CONFIG_PPC64)  := -mtraceback=no
 117 ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
 118 CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mabi=elfv2,-mcall-aixdesc)
 119 AFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mabi=elfv2)
 120 else
 121 CFLAGS-$(CONFIG_PPC64)  += -mcall-aixdesc
 122 endif
 123 CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mcmodel=medium,-mminimal-toc)
 124 CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mno-pointers-to-nested-functions)
 125 CFLAGS-$(CONFIG_PPC32)  := -ffixed-r2 $(MULTIPLEWORD)
 126
 127 ifeq ($(CONFIG_PPC_BOOK3S_64),y)
 128 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,-mtune=power4)
 129 else
 130 CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
 131 endif
 132
 133 CFLAGS-$(CONFIG_CELL_CPU) += $(call cc-option,-mcpu=cell)
 134 CFLAGS-$(CONFIG_POWER4_CPU) += $(call cc-option,-mcpu=power4)
 135 CFLAGS-$(CONFIG_POWER5_CPU) += $(call cc-option,-mcpu=power5)
 136 CFLAGS-$(CONFIG_POWER6_CPU) += $(call cc-option,-mcpu=power6)
 137 CFLAGS-$(CONFIG_POWER7_CPU) += $(call cc-option,-mcpu=power7)
 138
 139 # Altivec option not allowed with e500mc64 in GCC.
 140 ifeq ($(CONFIG_ALTIVEC),y)
 141 E5500_CPU := -mcpu=powerpc64
 142 else
 143 E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
 144 endif
 145 CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU)
 146 CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
 147
 148 ifeq ($(CONFIG_PPC32),y)
 149 ifeq ($(CONFIG_PPC_E500MC),y)
 150 CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc)
 151 else
 152 CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc)
 153 endif
 154 endif
 155
 156 CFLAGS-$(CONFIG_TUNE_CELL) += $(call cc-option,-mtune=cell)
 157
 158 asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
 159
 160 KBUILD_CPPFLAGS += -Iarch/$(ARCH) $(asinstr)
 161 KBUILD_AFLAGS   += -Iarch/$(ARCH) $(AFLAGS-y)
 162 KBUILD_CFLAGS   += -msoft-float -pipe -Iarch/$(ARCH) $(CFLAGS-y)
 163 CPP             = $(CC) -E $(KBUILD_CFLAGS)
 164
 165 CHECKFLAGS      += -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__
 166
 167 KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
 168
 169 ifeq ($(CONFIG_476FPE_ERR46),y)
 170         KBUILD_LDFLAGS_MODULE += --ppc476-workaround \
 171                 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds
 172 endif
 173
 174 # No AltiVec or VSX instructions when building kernel
 175 KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
 176 KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
 177
 178 # No SPE instruction when building kernel
 179 # (We use all available options to help semi-broken compilers)
 180 KBUILD_CFLAGS += $(call cc-option,-mno-spe)
 181 KBUILD_CFLAGS += $(call cc-option,-mspe=no)
 182
 183 # Enable unit-at-a-time mode when possible. It shrinks the
 184 # kernel considerably.
 185 KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
 186
 187 # FIXME: the module load should be taught about the additional relocs
 188 # generated by this.
 189 # revert to pre-gcc-4.4 behaviour of .eh_frame
 190 KBUILD_CFLAGS   += $(call cc-option,-fno-dwarf2-cfi-asm)
 191
 192 # Never use string load/store instructions as they are
 193 # often slow when they are implemented at all
 194 KBUILD_CFLAGS           += -mno-string
 195
 196 ifeq ($(CONFIG_6xx),y)
 197 KBUILD_CFLAGS           += -mcpu=powerpc
 198 endif
 199
 200 # Work around a gcc code-gen bug with -fno-omit-frame-pointer.
 201 ifeq ($(CONFIG_FUNCTION_TRACER),y)
 202 KBUILD_CFLAGS           += -mno-sched-epilog
 203 endif
 204
 205 cpu-as-$(CONFIG_4xx)            += -Wa,-m405
 206 cpu-as-$(CONFIG_ALTIVEC)        += -Wa,-maltivec
 207 cpu-as-$(CONFIG_E200)           += -Wa,-me200
 208
 209 KBUILD_AFLAGS += $(cpu-as-y)
 210 KBUILD_CFLAGS += $(cpu-as-y)
 211
 212 head-y                          := arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o
 213 head-$(CONFIG_8xx)              := arch/powerpc/kernel/head_8xx.o
 214 head-$(CONFIG_40x)              := arch/powerpc/kernel/head_40x.o
 215 head-$(CONFIG_44x)              := arch/powerpc/kernel/head_44x.o
 216 head-$(CONFIG_FSL_BOOKE)        := arch/powerpc/kernel/head_fsl_booke.o
 217
 218 head-$(CONFIG_PPC64)            += arch/powerpc/kernel/entry_64.o
 219 head-$(CONFIG_PPC_FPU)          += arch/powerpc/kernel/fpu.o
 220 head-$(CONFIG_ALTIVEC)          += arch/powerpc/kernel/vector.o
 221 head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE)  += arch/powerpc/kernel/prom_init.o
 222
 223 core-y                          += arch/powerpc/kernel/ \
 224                                    arch/powerpc/mm/ \
 225                                    arch/powerpc/lib/ \
 226                                    arch/powerpc/sysdev/ \
 227                                    arch/powerpc/platforms/ \
 228                                    arch/powerpc/math-emu/ \
 229                                    arch/powerpc/crypto/ \
 230                                    arch/powerpc/net/
 231 core-$(CONFIG_XMON)             += arch/powerpc/xmon/
 232 core-$(CONFIG_KVM)              += arch/powerpc/kvm/
 233 core-$(CONFIG_PERF_EVENTS)      += arch/powerpc/perf/
 234
 235 drivers-$(CONFIG_OPROFILE)      += arch/powerpc/oprofile/
 236
 237 # Default to zImage, override when needed
 238 all: zImage
 239
 240 # With make 3.82 we cannot mix normal and wildcard targets
 241 BOOT_TARGETS1 := zImage zImage.initrd uImage
 242 BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
 243
 244 PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
 245
 246 boot := arch/$(ARCH)/boot
 247
 248 ifeq ($(CONFIG_RELOCATABLE),y)
 249 quiet_cmd_relocs_check = CALL    $<
 250       cmd_relocs_check = perl $< "$(OBJDUMP)" "$(obj)/vmlinux"
 251
 252 PHONY += relocs_check
 253 relocs_check: arch/powerpc/relocs_check.pl vmlinux
 254         $(call cmd,relocs_check)
 255
 256 zImage: relocs_check
 257 endif
 258
 259 $(BOOT_TARGETS1): vmlinux
 260         $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 261 $(BOOT_TARGETS2): vmlinux
 262         $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 263
 264
 265 bootwrapper_install:
 266         $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 267
 268 %.dtb: scripts
 269         $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 270
 271 define archhelp
 272   @echo '* zImage          - Build default images selected by kernel config'
 273   @echo '  zImage.*        - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
 274   @echo '  uImage          - U-Boot native image format'
 275   @echo '  cuImage.<dt>    - Backwards compatible U-Boot image for older'
 276   @echo '                    versions which do not support device trees'
 277   @echo '  dtbImage.<dt>   - zImage with an embedded device tree blob'
 278   @echo '  simpleImage.<dt> - Firmware independent image.'
 279   @echo '  treeImage.<dt>  - Support for older IBM 4xx firmware (not U-Boot)'
 280   @echo '  install         - Install kernel using'
 281   @echo '                    (your) ~/bin/$(INSTALLKERNEL) or'
 282   @echo '                    (distribution) /sbin/$(INSTALLKERNEL) or'
 283   @echo '                    install to $$(INSTALL_PATH) and run lilo'
 284   @echo '  *_defconfig     - Select default config from arch/$(ARCH)/configs'
 285   @echo ''
 286   @echo '  Targets with <dt> embed a device tree blob inside the image'
 287   @echo '  These targets support board with firmware that does not'
 288   @echo '  support passing a device tree directly.  Replace <dt> with the'
 289   @echo '  name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
 290   @echo '  (minus the .dts extension).'
 291 endef
 292
 293 install:
 294         $(Q)$(MAKE) $(build)=$(boot) install
 295
 296 vdso_install:
 297 ifeq ($(CONFIG_PPC64),y)
 298         $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
 299 endif
 300         $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
 301
 302 archclean:
 303         $(Q)$(MAKE) $(clean)=$(boot)
 304
 305 archprepare: checkbin
 306
 307 # Use the file '.tmp_gas_check' for binutils tests, as gas won't output
 308 # to stdout and these checks are run even on install targets.
 309 TOUT    := .tmp_gas_check
 310
 311 # Check gcc and binutils versions:
 312 # - gcc-3.4 and binutils-2.14 are a fatal combination
 313 # - Require gcc 4.0 or above on 64-bit
 314 # - gcc-4.2.0 has issues compiling modules on 64-bit
 315 checkbin:
 316         @if test "$(call cc-version)" = "0304" ; then \
 317                 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
 318                         echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
 319                         echo 'correctly with gcc-3.4 and your version of binutils.'; \
 320                         echo '*** Please upgrade your binutils or downgrade your gcc'; \
 321                         false; \
 322                 fi ; \
 323         fi
 324         @if test "$(call cc-version)" -lt "0400" \
 325             && test "x${CONFIG_PPC64}" = "xy" ; then \
 326                 echo -n "Sorry, GCC v4.0 or above is required to build " ; \
 327                 echo "the 64-bit powerpc kernel." ; \
 328                 false ; \
 329         fi
 330         @if test "$(call cc-fullversion)" = "040200" \
 331             && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
 332                 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
 333                 echo 'kernel with modules enabled.' ; \
 334                 echo -n '*** Please use a different GCC version or ' ; \
 335                 echo 'disable kernel modules' ; \
 336                 false ; \
 337         fi
 338
 339 CLEAN_FILES += $(TOUT)
 340