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) += $(call cc-option,-mtune=cell)
  99
 100 KBUILD_CPPFLAGS += -Iarch/$(ARCH)
 101 KBUILD_AFLAGS   += -Iarch/$(ARCH)
 102 KBUILD_CFLAGS   += -msoft-float -pipe -Iarch/$(ARCH) $(CFLAGS-y)
 103 CPP             = $(CC) -E $(KBUILD_CFLAGS)
 104
 105 CHECKFLAGS      += -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__
 106
 107 KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
 108
 109 # No AltiVec or VSX instructions when building kernel
 110 KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
 111 KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
 112
 113 # No SPE instruction when building kernel
 114 # (We use all available options to help semi-broken compilers)
 115 KBUILD_CFLAGS += $(call cc-option,-mno-spe)
 116 KBUILD_CFLAGS += $(call cc-option,-mspe=no)
 117
 118 # Enable unit-at-a-time mode when possible. It shrinks the
 119 # kernel considerably.
 120 KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
 121
 122 # FIXME: the module load should be taught about the additional relocs
 123 # generated by this.
 124 # revert to pre-gcc-4.4 behaviour of .eh_frame
 125 KBUILD_CFLAGS   += $(call cc-option,-fno-dwarf2-cfi-asm)
 126
 127 # Never use string load/store instructions as they are
 128 # often slow when they are implemented at all
 129 KBUILD_CFLAGS           += -mno-string
 130
 131 ifeq ($(CONFIG_6xx),y)
 132 KBUILD_CFLAGS           += -mcpu=powerpc
 133 endif
 134
 135 # Work around a gcc code-gen bug with -fno-omit-frame-pointer.
 136 ifeq ($(CONFIG_FUNCTION_TRACER),y)
 137 KBUILD_CFLAGS           += -mno-sched-epilog
 138 endif
 139
 140 cpu-as-$(CONFIG_4xx)            += -Wa,-m405
 141 cpu-as-$(CONFIG_ALTIVEC)        += -Wa,-maltivec
 142 cpu-as-$(CONFIG_E500)           += -Wa,-me500
 143 cpu-as-$(CONFIG_E200)           += -Wa,-me200
 144
 145 KBUILD_AFLAGS += $(cpu-as-y)
 146 KBUILD_CFLAGS += $(cpu-as-y)
 147
 148 head-y                          := arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o
 149 head-$(CONFIG_8xx)              := arch/powerpc/kernel/head_8xx.o
 150 head-$(CONFIG_40x)              := arch/powerpc/kernel/head_40x.o
 151 head-$(CONFIG_44x)              := arch/powerpc/kernel/head_44x.o
 152 head-$(CONFIG_FSL_BOOKE)        := arch/powerpc/kernel/head_fsl_booke.o
 153
 154 head-$(CONFIG_PPC64)            += arch/powerpc/kernel/entry_64.o
 155 head-$(CONFIG_PPC_FPU)          += arch/powerpc/kernel/fpu.o
 156 head-$(CONFIG_ALTIVEC)          += arch/powerpc/kernel/vector.o
 157 head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE)  += arch/powerpc/kernel/prom_init.o
 158
 159 core-y                          += arch/powerpc/kernel/ \
 160                                    arch/powerpc/mm/ \
 161                                    arch/powerpc/lib/ \
 162                                    arch/powerpc/sysdev/ \
 163                                    arch/powerpc/platforms/ \
 164                                    arch/powerpc/math-emu/ \
 165                                    arch/powerpc/crypto/ \
 166                                    arch/powerpc/net/
 167 core-$(CONFIG_XMON)             += arch/powerpc/xmon/
 168 core-$(CONFIG_KVM)              += arch/powerpc/kvm/
 169 core-$(CONFIG_PERF_EVENTS)      += arch/powerpc/perf/
 170
 171 drivers-$(CONFIG_OPROFILE)      += arch/powerpc/oprofile/
 172
 173 # Default to zImage, override when needed
 174 all: zImage
 175
 176 # With make 3.82 we cannot mix normal and wildcard targets
 177 BOOT_TARGETS1 := zImage zImage.initrd uImage
 178 BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
 179
 180 PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
 181
 182 boot := arch/$(ARCH)/boot
 183
 184 ifeq ($(CONFIG_RELOCATABLE),y)
 185 quiet_cmd_relocs_check = CALL    $<
 186       cmd_relocs_check = perl $< "$(OBJDUMP)" "$(obj)/vmlinux"
 187
 188 PHONY += relocs_check
 189 relocs_check: arch/powerpc/relocs_check.pl vmlinux
 190         $(call cmd,relocs_check)
 191
 192 zImage: relocs_check
 193 endif
 194
 195 $(BOOT_TARGETS1): vmlinux
 196         $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 197 $(BOOT_TARGETS2): vmlinux
 198         $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 199
 200
 201 bootwrapper_install:
 202         $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 203
 204 %.dtb: scripts
 205         $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 206
 207 define archhelp
 208   @echo '* zImage          - Build default images selected by kernel config'
 209   @echo '  zImage.*        - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
 210   @echo '  uImage          - U-Boot native image format'
 211   @echo '  cuImage.<dt>    - Backwards compatible U-Boot image for older'
 212   @echo '                    versions which do not support device trees'
 213   @echo '  dtbImage.<dt>   - zImage with an embedded device tree blob'
 214   @echo '  simpleImage.<dt> - Firmware independent image.'
 215   @echo '  treeImage.<dt>  - Support for older IBM 4xx firmware (not U-Boot)'
 216   @echo '  install         - Install kernel using'
 217   @echo '                    (your) ~/bin/$(INSTALLKERNEL) or'
 218   @echo '                    (distribution) /sbin/$(INSTALLKERNEL) or'
 219   @echo '                    install to $$(INSTALL_PATH) and run lilo'
 220   @echo '  *_defconfig     - Select default config from arch/$(ARCH)/configs'
 221   @echo ''
 222   @echo '  Targets with <dt> embed a device tree blob inside the image'
 223   @echo '  These targets support board with firmware that does not'
 224   @echo '  support passing a device tree directly.  Replace <dt> with the'
 225   @echo '  name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
 226   @echo '  (minus the .dts extension).'
 227 endef
 228
 229 install:
 230         $(Q)$(MAKE) $(build)=$(boot) install
 231
 232 vdso_install:
 233 ifeq ($(CONFIG_PPC64),y)
 234         $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
 235 endif
 236         $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
 237
 238 archclean:
 239         $(Q)$(MAKE) $(clean)=$(boot)
 240
 241 archprepare: checkbin
 242
 243 # Use the file '.tmp_gas_check' for binutils tests, as gas won't output
 244 # to stdout and these checks are run even on install targets.
 245 TOUT    := .tmp_gas_check
 246
 247 # Check gcc and binutils versions:
 248 # - gcc-3.4 and binutils-2.14 are a fatal combination
 249 # - Require gcc 4.0 or above on 64-bit
 250 # - gcc-4.2.0 has issues compiling modules on 64-bit
 251 checkbin:
 252         @if test "$(call cc-version)" = "0304" ; then \
 253                 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
 254                         echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
 255                         echo 'correctly with gcc-3.4 and your version of binutils.'; \
 256                         echo '*** Please upgrade your binutils or downgrade your gcc'; \
 257                         false; \
 258                 fi ; \
 259         fi
 260         @if test "$(call cc-version)" -lt "0400" \
 261             && test "x${CONFIG_PPC64}" = "xy" ; then \
 262                 echo -n "Sorry, GCC v4.0 or above is required to build " ; \
 263                 echo "the 64-bit powerpc kernel." ; \
 264                 false ; \
 265         fi
 266         @if test "$(call cc-fullversion)" = "040200" \
 267             && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
 268                 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
 269                 echo 'kernel with modules enabled.' ; \
 270                 echo -n '*** Please use a different GCC version or ' ; \
 271                 echo 'disable kernel modules' ; \
 272                 false ; \
 273         fi
 274
 275 CLEAN_FILES += $(TOUT)
 276