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 $(AR)
  64endif
  65
  66LDFLAGS_vmlinux-y := -Bstatic
  67LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
  68LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y)
  69
  70CFLAGS-$(CONFIG_PPC64)  := -mminimal-toc -mtraceback=no -mcall-aixdesc
  71CFLAGS-$(CONFIG_PPC32)  := -ffixed-r2 -mmultiple
  72
  73CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,-mtune=power4)
  74CFLAGS-$(CONFIG_CELL_CPU) += $(call cc-option,-mcpu=cell)
  75CFLAGS-$(CONFIG_POWER4_CPU) += $(call cc-option,-mcpu=power4)
  76CFLAGS-$(CONFIG_POWER5_CPU) += $(call cc-option,-mcpu=power5)
  77CFLAGS-$(CONFIG_POWER6_CPU) += $(call cc-option,-mcpu=power6)
  78CFLAGS-$(CONFIG_POWER7_CPU) += $(call cc-option,-mcpu=power7)
  79
  80CFLAGS-$(CONFIG_TUNE_CELL) += $(call cc-option,-mtune=cell)
  81
  82KBUILD_CPPFLAGS += -Iarch/$(ARCH)
  83KBUILD_AFLAGS   += -Iarch/$(ARCH)
  84KBUILD_CFLAGS   += -msoft-float -pipe -Iarch/$(ARCH) $(CFLAGS-y)
  85CPP             = $(CC) -E $(KBUILD_CFLAGS)
  86
  87CHECKFLAGS      += -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__
  88
  89KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
  90
  91# No AltiVec or VSX instructions when building kernel
  92KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
  93KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
  94
  95# No SPE instruction when building kernel
  96# (We use all available options to help semi-broken compilers)
  97KBUILD_CFLAGS += $(call cc-option,-mno-spe)
  98KBUILD_CFLAGS += $(call cc-option,-mspe=no)
  99
 100# Enable unit-at-a-time mode when possible. It shrinks the
 101# kernel considerably.
 102KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
 103
 104# FIXME: the module load should be taught about the additional relocs
 105# generated by this.
 106# revert to pre-gcc-4.4 behaviour of .eh_frame
 107KBUILD_CFLAGS   += $(call cc-option,-fno-dwarf2-cfi-asm)
 108
 109# Never use string load/store instructions as they are
 110# often slow when they are implemented at all
 111KBUILD_CFLAGS           += -mno-string
 112
 113ifeq ($(CONFIG_6xx),y)
 114KBUILD_CFLAGS           += -mcpu=powerpc
 115endif
 116
 117# Work around a gcc code-gen bug with -fno-omit-frame-pointer.
 118ifeq ($(CONFIG_FUNCTION_TRACER),y)
 119KBUILD_CFLAGS           += -mno-sched-epilog
 120endif
 121
 122cpu-as-$(CONFIG_4xx)            += -Wa,-m405
 123cpu-as-$(CONFIG_ALTIVEC)        += -Wa,-maltivec
 124cpu-as-$(CONFIG_E500)           += -Wa,-me500
 125cpu-as-$(CONFIG_E200)           += -Wa,-me200
 126
 127KBUILD_AFLAGS += $(cpu-as-y)
 128KBUILD_CFLAGS += $(cpu-as-y)
 129
 130head-y                          := arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o
 131head-$(CONFIG_8xx)              := arch/powerpc/kernel/head_8xx.o
 132head-$(CONFIG_40x)              := arch/powerpc/kernel/head_40x.o
 133head-$(CONFIG_44x)              := arch/powerpc/kernel/head_44x.o
 134head-$(CONFIG_FSL_BOOKE)        := arch/powerpc/kernel/head_fsl_booke.o
 135
 136head-$(CONFIG_PPC64)            += arch/powerpc/kernel/entry_64.o
 137head-$(CONFIG_PPC_FPU)          += arch/powerpc/kernel/fpu.o
 138head-$(CONFIG_ALTIVEC)          += arch/powerpc/kernel/vector.o
 139
 140core-y                          += arch/powerpc/kernel/ \
 141                                   arch/powerpc/mm/ \
 142                                   arch/powerpc/lib/ \
 143                                   arch/powerpc/sysdev/ \
 144                                   arch/powerpc/platforms/ \
 145                                   arch/powerpc/math-emu/ \
 146                                   arch/powerpc/net/
 147core-$(CONFIG_XMON)             += arch/powerpc/xmon/
 148core-$(CONFIG_KVM)              += arch/powerpc/kvm/
 149core-$(CONFIG_PERF_EVENTS)      += arch/powerpc/perf/
 150
 151drivers-$(CONFIG_OPROFILE)      += arch/powerpc/oprofile/
 152
 153# Default to zImage, override when needed
 154all: zImage
 155
 156# With make 3.82 we cannot mix normal and wildcard targets
 157BOOT_TARGETS1 := zImage zImage.initrd uImage
 158BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
 159
 160PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
 161
 162boot := arch/$(ARCH)/boot
 163
 164ifeq ($(CONFIG_RELOCATABLE),y)
 165quiet_cmd_relocs_check = CALL    $<
 166      cmd_relocs_check = perl $< "$(OBJDUMP)" "$(obj)/vmlinux"
 167
 168PHONY += relocs_check
 169relocs_check: arch/powerpc/relocs_check.pl vmlinux
 170        $(call cmd,relocs_check)
 171
 172zImage: relocs_check
 173endif
 174
 175$(BOOT_TARGETS1): vmlinux
 176        $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 177$(BOOT_TARGETS2): vmlinux
 178        $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 179
 180
 181bootwrapper_install:
 182        $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 183
 184%.dtb:
 185        $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 186
 187define archhelp
 188  @echo '* zImage          - Build default images selected by kernel config'
 189  @echo '  zImage.*        - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
 190  @echo '  uImage          - U-Boot native image format'
 191  @echo '  cuImage.<dt>    - Backwards compatible U-Boot image for older'
 192  @echo '                    versions which do not support device trees'
 193  @echo '  dtbImage.<dt>   - zImage with an embedded device tree blob'
 194  @echo '  simpleImage.<dt> - Firmware independent image.'
 195  @echo '  treeImage.<dt>  - Support for older IBM 4xx firmware (not U-Boot)'
 196  @echo '  install         - Install kernel using'
 197  @echo '                    (your) ~/bin/$(INSTALLKERNEL) or'
 198  @echo '                    (distribution) /sbin/$(INSTALLKERNEL) or'
 199  @echo '                    install to $$(INSTALL_PATH) and run lilo'
 200  @echo '  *_defconfig     - Select default config from arch/$(ARCH)/configs'
 201  @echo ''
 202  @echo '  Targets with <dt> embed a device tree blob inside the image'
 203  @echo '  These targets support board with firmware that does not'
 204  @echo '  support passing a device tree directly.  Replace <dt> with the'
 205  @echo '  name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
 206  @echo '  (minus the .dts extension).'
 207endef
 208
 209install:
 210        $(Q)$(MAKE) $(build)=$(boot) install
 211
 212vdso_install:
 213ifeq ($(CONFIG_PPC64),y)
 214        $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
 215endif
 216        $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
 217
 218archclean:
 219        $(Q)$(MAKE) $(clean)=$(boot)
 220
 221archprepare: checkbin
 222
 223# Use the file '.tmp_gas_check' for binutils tests, as gas won't output
 224# to stdout and these checks are run even on install targets.
 225TOUT    := .tmp_gas_check
 226
 227# Check gcc and binutils versions:
 228# - gcc-3.4 and binutils-2.14 are a fatal combination
 229# - Require gcc 4.0 or above on 64-bit
 230# - gcc-4.2.0 has issues compiling modules on 64-bit
 231checkbin:
 232        @if test "$(call cc-version)" = "0304" ; then \
 233                if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
 234                        echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
 235                        echo 'correctly with gcc-3.4 and your version of binutils.'; \
 236                        echo '*** Please upgrade your binutils or downgrade your gcc'; \
 237                        false; \
 238                fi ; \
 239        fi
 240        @if test "$(call cc-version)" -lt "0400" \
 241            && test "x${CONFIG_PPC64}" = "xy" ; then \
 242                echo -n "Sorry, GCC v4.0 or above is required to build " ; \
 243                echo "the 64-bit powerpc kernel." ; \
 244                false ; \
 245        fi
 246        @if test "$(call cc-fullversion)" = "040200" \
 247            && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
 248                echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
 249                echo 'kernel with modules enabled.' ; \
 250                echo -n '*** Please use a different GCC version or ' ; \
 251                echo 'disable kernel modules' ; \
 252                false ; \
 253        fi
 254
 255CLEAN_FILES += $(TOUT)
 256
 257
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