linux/arch/powerpc/Makefile
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   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
  15HAS_BIARCH      := $(call cc-option-yn, -m32)
  16
  17# Set default 32 bits cross compilers for vdso and boot wrapper
  18CROSS32_COMPILE ?=
  19
  20CROSS32CC               := $(CROSS32_COMPILE)gcc
  21CROSS32AR               := $(CROSS32_COMPILE)ar
  22
  23ifeq ($(HAS_BIARCH),y)
  24ifeq ($(CROSS32_COMPILE),)
  25CROSS32CC       := $(CC) -m32
  26CROSS32AR       := GNUTARGET=elf32-powerpc $(AR)
  27endif
  28endif
  29
  30export CROSS32CC CROSS32AR
  31
  32ifeq ($(CROSS_COMPILE),)
  33KBUILD_DEFCONFIG := $(shell uname -m)_defconfig
  34else
  35KBUILD_DEFCONFIG := ppc64_defconfig
  36endif
  37
  38ifeq ($(CONFIG_PPC64),y)
  39OLDARCH := ppc64
  40
  41new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
  42
  43ifeq ($(new_nm),y)
  44NM              := $(NM) --synthetic
  45endif
  46
  47else
  48OLDARCH := ppc
  49endif
  50
  51# It seems there are times we use this Makefile without
  52# including the config file, but this replicates the old behaviour
  53ifeq ($(CONFIG_WORD_SIZE),)
  54CONFIG_WORD_SIZE := 32
  55endif
  56
  57UTS_MACHINE := $(OLDARCH)
  58
  59ifeq ($(HAS_BIARCH),y)
  60override AS     += -a$(CONFIG_WORD_SIZE)
  61override LD     += -m elf$(CONFIG_WORD_SIZE)ppc
  62override CC     += -m$(CONFIG_WORD_SIZE)
  63override AR     := GNUTARGET=elf$(CONFIG_WORD_SIZE)-powerpc $(AR)
  64endif
  65
  66LDFLAGS_vmlinux := -Bstatic
  67
  68CFLAGS-$(CONFIG_PPC64)  := -mminimal-toc -mtraceback=none  -mcall-aixdesc
  69CFLAGS-$(CONFIG_PPC32)  := -ffixed-r2 -mmultiple
  70KBUILD_CPPFLAGS += -Iarch/$(ARCH)
  71KBUILD_AFLAGS   += -Iarch/$(ARCH)
  72KBUILD_CFLAGS   += -msoft-float -pipe -Iarch/$(ARCH) $(CFLAGS-y)
  73CPP             = $(CC) -E $(KBUILD_CFLAGS)
  74
  75CHECKFLAGS      += -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__
  76
  77ifeq ($(CONFIG_PPC64),y)
  78GCC_BROKEN_VEC  := $(shell if [ $(call cc-version) -lt 0400 ] ; then echo "y"; fi)
  79
  80ifeq ($(CONFIG_POWER4_ONLY),y)
  81ifeq ($(CONFIG_ALTIVEC),y)
  82ifeq ($(GCC_BROKEN_VEC),y)
  83        KBUILD_CFLAGS += $(call cc-option,-mcpu=970)
  84else
  85        KBUILD_CFLAGS += $(call cc-option,-mcpu=power4)
  86endif
  87else
  88        KBUILD_CFLAGS += $(call cc-option,-mcpu=power4)
  89endif
  90else
  91        KBUILD_CFLAGS += $(call cc-option,-mtune=power4)
  92endif
  93else
  94LDFLAGS_MODULE  += arch/powerpc/lib/crtsavres.o
  95endif
  96
  97ifeq ($(CONFIG_TUNE_CELL),y)
  98        KBUILD_CFLAGS += $(call cc-option,-mtune=cell)
  99endif
 100
 101# No AltiVec instruction when building kernel
 102KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
 103
 104# No SPE instruction when building kernel
 105KBUILD_CFLAGS += $(call cc-option,-mno-spe)
 106
 107# Enable unit-at-a-time mode when possible. It shrinks the
 108# kernel considerably.
 109KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
 110
 111# Never use string load/store instructions as they are
 112# often slow when they are implemented at all
 113KBUILD_CFLAGS           += -mno-string
 114
 115ifeq ($(CONFIG_6xx),y)
 116KBUILD_CFLAGS           += -mcpu=powerpc
 117endif
 118
 119# Work around a gcc code-gen bug with -fno-omit-frame-pointer.
 120ifeq ($(CONFIG_FTRACE),y)
 121KBUILD_CFLAGS           += -mno-sched-epilog
 122endif
 123
 124cpu-as-$(CONFIG_4xx)            += -Wa,-m405
 125cpu-as-$(CONFIG_6xx)            += -Wa,-maltivec
 126cpu-as-$(CONFIG_POWER4)         += -Wa,-maltivec
 127cpu-as-$(CONFIG_E500)           += -Wa,-me500
 128cpu-as-$(CONFIG_E200)           += -Wa,-me200
 129
 130KBUILD_AFLAGS += $(cpu-as-y)
 131KBUILD_CFLAGS += $(cpu-as-y)
 132
 133head-y                          := arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o
 134head-$(CONFIG_8xx)              := arch/powerpc/kernel/head_8xx.o
 135head-$(CONFIG_40x)              := arch/powerpc/kernel/head_40x.o
 136head-$(CONFIG_44x)              := arch/powerpc/kernel/head_44x.o
 137head-$(CONFIG_FSL_BOOKE)        := arch/powerpc/kernel/head_fsl_booke.o
 138
 139head-$(CONFIG_PPC64)            += arch/powerpc/kernel/entry_64.o
 140head-$(CONFIG_PPC_FPU)          += arch/powerpc/kernel/fpu.o
 141
 142core-y                          += arch/powerpc/kernel/ \
 143                                   arch/powerpc/mm/ \
 144                                   arch/powerpc/lib/ \
 145                                   arch/powerpc/sysdev/ \
 146                                   arch/powerpc/platforms/
 147core-$(CONFIG_MATH_EMULATION)   += arch/powerpc/math-emu/
 148core-$(CONFIG_XMON)             += arch/powerpc/xmon/
 149core-$(CONFIG_KVM)              += arch/powerpc/kvm/
 150
 151drivers-$(CONFIG_OPROFILE)      += arch/powerpc/oprofile/
 152
 153# Default to zImage, override when needed
 154all: zImage
 155
 156CPPFLAGS_vmlinux.lds    := -Upowerpc
 157
 158BOOT_TARGETS = zImage zImage.initrd uImage zImage% dtbImage% treeImage.% cuImage.% simpleImage.%
 159
 160PHONY += $(BOOT_TARGETS)
 161
 162boot := arch/$(ARCH)/boot
 163
 164$(BOOT_TARGETS): vmlinux
 165        $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 166
 167bootwrapper_install %.dtb:
 168        $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 169
 170define archhelp
 171  @echo '* zImage          - Build default images selected by kernel config'
 172  @echo '  zImage.*        - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
 173  @echo '  uImage          - U-Boot native image format'
 174  @echo '  cuImage.<dt>    - Backwards compatible U-Boot image for older'
 175  @echo '                    versions which do not support device trees'
 176  @echo '  dtbImage.<dt>   - zImage with an embedded device tree blob'
 177  @echo '  simpleImage.<dt> - Firmware independent image.'
 178  @echo '  treeImage.<dt>  - Support for older IBM 4xx firmware (not U-Boot)'
 179  @echo '  install         - Install kernel using'
 180  @echo '                    (your) ~/bin/installkernel or'
 181  @echo '                    (distribution) /sbin/installkernel or'
 182  @echo '                    install to $$(INSTALL_PATH) and run lilo'
 183  @echo '  *_defconfig     - Select default config from arch/$(ARCH)/configs'
 184  @echo ''
 185  @echo '  Targets with <dt> embed a device tree blob inside the image'
 186  @echo '  These targets support board with firmware that does not'
 187  @echo '  support passing a device tree directly.  Replace <dt> with the'
 188  @echo '  name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
 189  @echo '  (minus the .dts extension).'
 190endef
 191
 192install:
 193        $(Q)$(MAKE) $(build)=$(boot) install
 194
 195vdso_install:
 196ifeq ($(CONFIG_PPC64),y)
 197        $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
 198endif
 199        $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
 200
 201archclean:
 202        $(Q)$(MAKE) $(clean)=$(boot)
 203
 204archprepare: checkbin
 205
 206# Use the file '.tmp_gas_check' for binutils tests, as gas won't output
 207# to stdout and these checks are run even on install targets.
 208TOUT    := .tmp_gas_check
 209# Ensure this is binutils 2.12.1 (or 2.12.90.0.7) or later for altivec
 210# instructions.
 211# gcc-3.4 and binutils-2.14 are a fatal combination.
 212
 213checkbin:
 214        @if test "$(call cc-version)" = "0304" ; then \
 215                if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
 216                        echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
 217                        echo 'correctly with gcc-3.4 and your version of binutils.'; \
 218                        echo '*** Please upgrade your binutils or downgrade your gcc'; \
 219                        false; \
 220                fi ; \
 221        fi
 222        @if test "$(call cc-fullversion)" = "040200" \
 223            && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
 224                echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
 225                echo 'kernel with modules enabled.' ; \
 226                echo -n '*** Please use a different GCC version or ' ; \
 227                echo 'disable kernel modules' ; \
 228                false ; \
 229        fi
 230        @if ! /bin/echo dssall | $(AS) -many -o $(TOUT) >/dev/null 2>&1 ; then \
 231                echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build ' ; \
 232                echo 'correctly with old versions of binutils.' ; \
 233                echo '*** Please upgrade your binutils to 2.12.1 or newer' ; \
 234                false ; \
 235        fi
 236
 237CLEAN_FILES += $(TOUT)
 238
 239