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 OLDARCH := ppc64
  40
  41 new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
  42
  43 ifeq ($(new_nm),y)
  44 NM              := $(NM) --synthetic
  45 endif
  46
  47 else
  48 OLDARCH := ppc
  49 endif
  50
  51 # It seems there are times we use this Makefile without
  52 # including the config file, but this replicates the old behaviour
  53 ifeq ($(CONFIG_WORD_SIZE),)
  54 CONFIG_WORD_SIZE := 32
  55 endif
  56
  57 UTS_MACHINE := $(OLDARCH)
  58
  59 ifeq ($(HAS_BIARCH),y)
  60 override AS     += -a$(CONFIG_WORD_SIZE)
  61 override LD     += -m elf$(CONFIG_WORD_SIZE)ppc
  62 override CC     += -m$(CONFIG_WORD_SIZE)
  63 override AR     := GNUTARGET=elf$(CONFIG_WORD_SIZE)-powerpc $(AR)
  64 endif
  65
  66 LDFLAGS_vmlinux-y := -Bstatic
  67 LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
  68 LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y)
  69
  70 ifeq ($(CONFIG_PPC64),y)
  71 ifeq ($(call cc-option-yn,-mcmodel=medium),y)
  72         # -mcmodel=medium breaks modules because it uses 32bit offsets from
  73         # the TOC pointer to create pointers where possible. Pointers into the
  74         # percpu data area are created by this method.
  75         #
  76         # The kernel module loader relocates the percpu data section from the
  77         # original location (starting with 0xd...) to somewhere in the base
  78         # kernel percpu data space (starting with 0xc...). We need a full
  79         # 64bit relocation for this to work, hence -mcmodel=large.
  80         KBUILD_CFLAGS_MODULE += -mcmodel=large
  81 else
  82         export NO_MINIMAL_TOC := -mno-minimal-toc
  83 endif
  84 endif
  85
  86 CFLAGS-$(CONFIG_PPC64)  := -mtraceback=no -mcall-aixdesc
  87 CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mcmodel=medium,-mminimal-toc)
  88 CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mno-pointers-to-nested-functions)
  89 CFLAGS-$(CONFIG_PPC32)  := -ffixed-r2 -mmultiple
  90
  91 CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,-mtune=power4)
  92 CFLAGS-$(CONFIG_CELL_CPU) += $(call cc-option,-mcpu=cell)
  93 CFLAGS-$(CONFIG_POWER4_CPU) += $(call cc-option,-mcpu=power4)
  94 CFLAGS-$(CONFIG_POWER5_CPU) += $(call cc-option,-mcpu=power5)
  95 CFLAGS-$(CONFIG_POWER6_CPU) += $(call cc-option,-mcpu=power6)
  96 CFLAGS-$(CONFIG_POWER7_CPU) += $(call cc-option,-mcpu=power7)
  97
  98 CFLAGS-$(CONFIG_TUNE_CELL) += $(call cc-option,-mtune=cell)
  99
 100 asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
 101
 102 KBUILD_CPPFLAGS += -Iarch/$(ARCH) $(asinstr)
 103 KBUILD_AFLAGS   += -Iarch/$(ARCH)
 104 KBUILD_CFLAGS   += -msoft-float -pipe -Iarch/$(ARCH) $(CFLAGS-y)
 105 CPP             = $(CC) -E $(KBUILD_CFLAGS)
 106
 107 CHECKFLAGS      += -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__
 108
 109 KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
 110
 111 # No AltiVec or VSX instructions when building kernel
 112 KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
 113 KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
 114
 115 # No SPE instruction when building kernel
 116 # (We use all available options to help semi-broken compilers)
 117 KBUILD_CFLAGS += $(call cc-option,-mno-spe)
 118 KBUILD_CFLAGS += $(call cc-option,-mspe=no)
 119
 120 # Enable unit-at-a-time mode when possible. It shrinks the
 121 # kernel considerably.
 122 KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
 123
 124 # FIXME: the module load should be taught about the additional relocs
 125 # generated by this.
 126 # revert to pre-gcc-4.4 behaviour of .eh_frame
 127 KBUILD_CFLAGS   += $(call cc-option,-fno-dwarf2-cfi-asm)
 128
 129 # Never use string load/store instructions as they are
 130 # often slow when they are implemented at all
 131 KBUILD_CFLAGS           += -mno-string
 132
 133 ifeq ($(CONFIG_6xx),y)
 134 KBUILD_CFLAGS           += -mcpu=powerpc
 135 endif
 136
 137 # Work around a gcc code-gen bug with -fno-omit-frame-pointer.
 138 ifeq ($(CONFIG_FUNCTION_TRACER),y)
 139 KBUILD_CFLAGS           += -mno-sched-epilog
 140 endif
 141
 142 cpu-as-$(CONFIG_4xx)            += -Wa,-m405
 143 cpu-as-$(CONFIG_ALTIVEC)        += -Wa,-maltivec
 144 cpu-as-$(CONFIG_E500)           += -Wa,-me500
 145 cpu-as-$(CONFIG_E200)           += -Wa,-me200
 146
 147 KBUILD_AFLAGS += $(cpu-as-y)
 148 KBUILD_CFLAGS += $(cpu-as-y)
 149
 150 head-y                          := arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o
 151 head-$(CONFIG_8xx)              := arch/powerpc/kernel/head_8xx.o
 152 head-$(CONFIG_40x)              := arch/powerpc/kernel/head_40x.o
 153 head-$(CONFIG_44x)              := arch/powerpc/kernel/head_44x.o
 154 head-$(CONFIG_FSL_BOOKE)        := arch/powerpc/kernel/head_fsl_booke.o
 155
 156 head-$(CONFIG_PPC64)            += arch/powerpc/kernel/entry_64.o
 157 head-$(CONFIG_PPC_FPU)          += arch/powerpc/kernel/fpu.o
 158 head-$(CONFIG_ALTIVEC)          += arch/powerpc/kernel/vector.o
 159 head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE)  += arch/powerpc/kernel/prom_init.o
 160
 161 core-y                          += arch/powerpc/kernel/ \
 162                                    arch/powerpc/mm/ \
 163                                    arch/powerpc/lib/ \
 164                                    arch/powerpc/sysdev/ \
 165                                    arch/powerpc/platforms/ \
 166                                    arch/powerpc/math-emu/ \
 167                                    arch/powerpc/crypto/ \
 168                                    arch/powerpc/net/
 169 core-$(CONFIG_XMON)             += arch/powerpc/xmon/
 170 core-$(CONFIG_KVM)              += arch/powerpc/kvm/
 171 core-$(CONFIG_PERF_EVENTS)      += arch/powerpc/perf/
 172
 173 drivers-$(CONFIG_OPROFILE)      += arch/powerpc/oprofile/
 174
 175 # Default to zImage, override when needed
 176 all: zImage
 177
 178 # With make 3.82 we cannot mix normal and wildcard targets
 179 BOOT_TARGETS1 := zImage zImage.initrd uImage
 180 BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
 181
 182 PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
 183
 184 boot := arch/$(ARCH)/boot
 185
 186 ifeq ($(CONFIG_RELOCATABLE),y)
 187 quiet_cmd_relocs_check = CALL    $<
 188       cmd_relocs_check = perl $< "$(OBJDUMP)" "$(obj)/vmlinux"
 189
 190 PHONY += relocs_check
 191 relocs_check: arch/powerpc/relocs_check.pl vmlinux
 192         $(call cmd,relocs_check)
 193
 194 zImage: relocs_check
 195 endif
 196
 197 $(BOOT_TARGETS1): vmlinux
 198         $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 199 $(BOOT_TARGETS2): vmlinux
 200         $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 201
 202
 203 bootwrapper_install:
 204         $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 205
 206 %.dtb: scripts
 207         $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 208
 209 define archhelp
 210   @echo '* zImage          - Build default images selected by kernel config'
 211   @echo '  zImage.*        - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
 212   @echo '  uImage          - U-Boot native image format'
 213   @echo '  cuImage.<dt>    - Backwards compatible U-Boot image for older'
 214   @echo '                    versions which do not support device trees'
 215   @echo '  dtbImage.<dt>   - zImage with an embedded device tree blob'
 216   @echo '  simpleImage.<dt> - Firmware independent image.'
 217   @echo '  treeImage.<dt>  - Support for older IBM 4xx firmware (not U-Boot)'
 218   @echo '  install         - Install kernel using'
 219   @echo '                    (your) ~/bin/$(INSTALLKERNEL) or'
 220   @echo '                    (distribution) /sbin/$(INSTALLKERNEL) or'
 221   @echo '                    install to $$(INSTALL_PATH) and run lilo'
 222   @echo '  *_defconfig     - Select default config from arch/$(ARCH)/configs'
 223   @echo ''
 224   @echo '  Targets with <dt> embed a device tree blob inside the image'
 225   @echo '  These targets support board with firmware that does not'
 226   @echo '  support passing a device tree directly.  Replace <dt> with the'
 227   @echo '  name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
 228   @echo '  (minus the .dts extension).'
 229 endef
 230
 231 install:
 232         $(Q)$(MAKE) $(build)=$(boot) install
 233
 234 vdso_install:
 235 ifeq ($(CONFIG_PPC64),y)
 236         $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
 237 endif
 238         $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
 239
 240 archclean:
 241         $(Q)$(MAKE) $(clean)=$(boot)
 242
 243 archprepare: checkbin
 244
 245 # Use the file '.tmp_gas_check' for binutils tests, as gas won't output
 246 # to stdout and these checks are run even on install targets.
 247 TOUT    := .tmp_gas_check
 248
 249 # Check gcc and binutils versions:
 250 # - gcc-3.4 and binutils-2.14 are a fatal combination
 251 # - Require gcc 4.0 or above on 64-bit
 252 # - gcc-4.2.0 has issues compiling modules on 64-bit
 253 checkbin:
 254         @if test "$(call cc-version)" = "0304" ; then \
 255                 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
 256                         echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
 257                         echo 'correctly with gcc-3.4 and your version of binutils.'; \
 258                         echo '*** Please upgrade your binutils or downgrade your gcc'; \
 259                         false; \
 260                 fi ; \
 261         fi
 262         @if test "$(call cc-version)" -lt "0400" \
 263             && test "x${CONFIG_PPC64}" = "xy" ; then \
 264                 echo -n "Sorry, GCC v4.0 or above is required to build " ; \
 265                 echo "the 64-bit powerpc kernel." ; \
 266                 false ; \
 267         fi
 268         @if test "$(call cc-fullversion)" = "040200" \
 269             && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
 270                 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
 271                 echo 'kernel with modules enabled.' ; \
 272                 echo -n '*** Please use a different GCC version or ' ; \
 273                 echo 'disable kernel modules' ; \
 274                 false ; \
 275         fi
 276         @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \
 277             && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \
 278                 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \
 279                 echo 'in some circumstances.' ; \
 280                 echo -n '*** Please use a different binutils version.' ; \
 281                 false ; \
 282         fi
 283
 284
 285 CLEAN_FILES += $(TOUT)
 286