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 $(AR)
  64 endif
  65
  66 LDFLAGS_vmlinux-yy := -Bstatic
  67 LDFLAGS_vmlinux-$(CONFIG_PPC64)$(CONFIG_RELOCATABLE) := -pie
  68 LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-yy)
  69
  70 CFLAGS-$(CONFIG_PPC64)  := -mminimal-toc -mtraceback=none  -mcall-aixdesc
  71 CFLAGS-$(CONFIG_PPC32)  := -ffixed-r2 -mmultiple
  72 KBUILD_CPPFLAGS += -Iarch/$(ARCH)
  73 KBUILD_AFLAGS   += -Iarch/$(ARCH)
  74 KBUILD_CFLAGS   += -msoft-float -pipe -Iarch/$(ARCH) $(CFLAGS-y)
  75 CPP             = $(CC) -E $(KBUILD_CFLAGS)
  76
  77 CHECKFLAGS      += -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__
  78
  79 ifeq ($(CONFIG_PPC64),y)
  80 GCC_BROKEN_VEC  := $(shell if [ $(call cc-version) -lt 0400 ] ; then echo "y"; fi)
  81
  82 ifeq ($(CONFIG_POWER4_ONLY),y)
  83 ifeq ($(CONFIG_ALTIVEC),y)
  84 ifeq ($(GCC_BROKEN_VEC),y)
  85         KBUILD_CFLAGS += $(call cc-option,-mcpu=970)
  86 else
  87         KBUILD_CFLAGS += $(call cc-option,-mcpu=power4)
  88 endif
  89 else
  90         KBUILD_CFLAGS += $(call cc-option,-mcpu=power4)
  91 endif
  92 else
  93         KBUILD_CFLAGS += $(call cc-option,-mtune=power4)
  94 endif
  95 else
  96 LDFLAGS_MODULE  += arch/powerpc/lib/crtsavres.o
  97 endif
  98
  99 ifeq ($(CONFIG_TUNE_CELL),y)
 100         KBUILD_CFLAGS += $(call cc-option,-mtune=cell)
 101 endif
 102
 103 # No AltiVec instruction when building kernel
 104 KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
 105
 106 # No SPE instruction when building kernel
 107 # (We use all available options to help semi-broken compilers)
 108 KBUILD_CFLAGS += $(call cc-option,-mno-spe)
 109 KBUILD_CFLAGS += $(call cc-option,-mspe=no)
 110
 111 # Enable unit-at-a-time mode when possible. It shrinks the
 112 # kernel considerably.
 113 KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
 114
 115 # Never use string load/store instructions as they are
 116 # often slow when they are implemented at all
 117 KBUILD_CFLAGS           += -mno-string
 118
 119 ifeq ($(CONFIG_6xx),y)
 120 KBUILD_CFLAGS           += -mcpu=powerpc
 121 endif
 122
 123 # Work around a gcc code-gen bug with -fno-omit-frame-pointer.
 124 ifeq ($(CONFIG_FUNCTION_TRACER),y)
 125 KBUILD_CFLAGS           += -mno-sched-epilog
 126 endif
 127
 128 cpu-as-$(CONFIG_4xx)            += -Wa,-m405
 129 cpu-as-$(CONFIG_6xx)            += -Wa,-maltivec
 130 cpu-as-$(CONFIG_POWER4)         += -Wa,-maltivec
 131 cpu-as-$(CONFIG_E500)           += -Wa,-me500
 132 cpu-as-$(CONFIG_E200)           += -Wa,-me200
 133
 134 KBUILD_AFLAGS += $(cpu-as-y)
 135 KBUILD_CFLAGS += $(cpu-as-y)
 136
 137 head-y                          := arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o
 138 head-$(CONFIG_8xx)              := arch/powerpc/kernel/head_8xx.o
 139 head-$(CONFIG_40x)              := arch/powerpc/kernel/head_40x.o
 140 head-$(CONFIG_44x)              := arch/powerpc/kernel/head_44x.o
 141 head-$(CONFIG_FSL_BOOKE)        := arch/powerpc/kernel/head_fsl_booke.o
 142
 143 head-$(CONFIG_PPC64)            += arch/powerpc/kernel/entry_64.o
 144 head-$(CONFIG_PPC_FPU)          += arch/powerpc/kernel/fpu.o
 145
 146 core-y                          += arch/powerpc/kernel/ \
 147                                    arch/powerpc/mm/ \
 148                                    arch/powerpc/lib/ \
 149                                    arch/powerpc/sysdev/ \
 150                                    arch/powerpc/platforms/
 151 core-$(CONFIG_MATH_EMULATION)   += arch/powerpc/math-emu/
 152 core-$(CONFIG_XMON)             += arch/powerpc/xmon/
 153 core-$(CONFIG_KVM)              += arch/powerpc/kvm/
 154
 155 drivers-$(CONFIG_OPROFILE)      += arch/powerpc/oprofile/
 156
 157 # Default to zImage, override when needed
 158 all: zImage
 159
 160 CPPFLAGS_vmlinux.lds    := -Upowerpc
 161
 162 BOOT_TARGETS = zImage zImage.initrd uImage zImage% dtbImage% treeImage.% cuImage.% simpleImage.%
 163
 164 PHONY += $(BOOT_TARGETS)
 165
 166 boot := arch/$(ARCH)/boot
 167
 168 $(BOOT_TARGETS): vmlinux
 169         $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 170
 171 bootwrapper_install %.dtb:
 172         $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 173
 174 define archhelp
 175   @echo '* zImage          - Build default images selected by kernel config'
 176   @echo '  zImage.*        - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
 177   @echo '  uImage          - U-Boot native image format'
 178   @echo '  cuImage.<dt>    - Backwards compatible U-Boot image for older'
 179   @echo '                    versions which do not support device trees'
 180   @echo '  dtbImage.<dt>   - zImage with an embedded device tree blob'
 181   @echo '  simpleImage.<dt> - Firmware independent image.'
 182   @echo '  treeImage.<dt>  - Support for older IBM 4xx firmware (not U-Boot)'
 183   @echo '  install         - Install kernel using'
 184   @echo '                    (your) ~/bin/installkernel or'
 185   @echo '                    (distribution) /sbin/installkernel or'
 186   @echo '                    install to $$(INSTALL_PATH) and run lilo'
 187   @echo '  *_defconfig     - Select default config from arch/$(ARCH)/configs'
 188   @echo ''
 189   @echo '  Targets with <dt> embed a device tree blob inside the image'
 190   @echo '  These targets support board with firmware that does not'
 191   @echo '  support passing a device tree directly.  Replace <dt> with the'
 192   @echo '  name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
 193   @echo '  (minus the .dts extension).'
 194 endef
 195
 196 install:
 197         $(Q)$(MAKE) $(build)=$(boot) install
 198
 199 vdso_install:
 200 ifeq ($(CONFIG_PPC64),y)
 201         $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
 202 endif
 203         $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
 204
 205 archclean:
 206         $(Q)$(MAKE) $(clean)=$(boot)
 207
 208 archprepare: checkbin
 209
 210 # Use the file '.tmp_gas_check' for binutils tests, as gas won't output
 211 # to stdout and these checks are run even on install targets.
 212 TOUT    := .tmp_gas_check
 213 # Ensure this is binutils 2.12.1 (or 2.12.90.0.7) or later for altivec
 214 # instructions.
 215 # gcc-3.4 and binutils-2.14 are a fatal combination.
 216
 217 checkbin:
 218         @if test "$(call cc-version)" = "0304" ; then \
 219                 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
 220                         echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
 221                         echo 'correctly with gcc-3.4 and your version of binutils.'; \
 222                         echo '*** Please upgrade your binutils or downgrade your gcc'; \
 223                         false; \
 224                 fi ; \
 225         fi
 226         @if test "$(call cc-fullversion)" = "040200" \
 227             && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
 228                 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
 229                 echo 'kernel with modules enabled.' ; \
 230                 echo -n '*** Please use a different GCC version or ' ; \
 231                 echo 'disable kernel modules' ; \
 232                 false ; \
 233         fi
 234         @if ! /bin/echo dssall | $(AS) -many -o $(TOUT) >/dev/null 2>&1 ; then \
 235                 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build ' ; \
 236                 echo 'correctly with old versions of binutils.' ; \
 237                 echo '*** Please upgrade your binutils to 2.12.1 or newer' ; \
 238                 false ; \
 239         fi
 240
 241 CLEAN_FILES += $(TOUT)
 242