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 $(AR)
  64endif
  65
  66LDFLAGS_vmlinux-yy := -Bstatic
  67LDFLAGS_vmlinux-$(CONFIG_PPC64)$(CONFIG_RELOCATABLE) := -pie
  68LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-yy)
  69
  70CFLAGS-$(CONFIG_PPC64)  := -mminimal-toc -mtraceback=none  -mcall-aixdesc
  71CFLAGS-$(CONFIG_PPC32)  := -ffixed-r2 -mmultiple
  72KBUILD_CPPFLAGS += -Iarch/$(ARCH)
  73KBUILD_AFLAGS   += -Iarch/$(ARCH)
  74KBUILD_CFLAGS   += -msoft-float -pipe -Iarch/$(ARCH) $(CFLAGS-y)
  75CPP             = $(CC) -E $(KBUILD_CFLAGS)
  76
  77CHECKFLAGS      += -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__
  78
  79ifeq ($(CONFIG_PPC64),y)
  80GCC_BROKEN_VEC  := $(call cc-ifversion, -lt, 0400, y)
  81
  82ifeq ($(CONFIG_POWER4_ONLY),y)
  83ifeq ($(CONFIG_ALTIVEC),y)
  84ifeq ($(GCC_BROKEN_VEC),y)
  85        KBUILD_CFLAGS += $(call cc-option,-mcpu=970)
  86else
  87        KBUILD_CFLAGS += $(call cc-option,-mcpu=power4)
  88endif
  89else
  90        KBUILD_CFLAGS += $(call cc-option,-mcpu=power4)
  91endif
  92else
  93        KBUILD_CFLAGS += $(call cc-option,-mtune=power4)
  94endif
  95endif
  96
  97LDFLAGS_MODULE  += arch/powerpc/lib/crtsavres.o
  98
  99ifeq ($(CONFIG_TUNE_CELL),y)
 100        KBUILD_CFLAGS += $(call cc-option,-mtune=cell)
 101endif
 102
 103# No AltiVec instruction when building kernel
 104KBUILD_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)
 108KBUILD_CFLAGS += $(call cc-option,-mno-spe)
 109KBUILD_CFLAGS += $(call cc-option,-mspe=no)
 110
 111# Enable unit-at-a-time mode when possible. It shrinks the
 112# kernel considerably.
 113KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
 114
 115# FIXME: the module load should be taught about the additional relocs
 116# generated by this.
 117# revert to pre-gcc-4.4 behaviour of .eh_frame
 118KBUILD_CFLAGS   += $(call cc-option,-fno-dwarf2-cfi-asm)
 119
 120# Never use string load/store instructions as they are
 121# often slow when they are implemented at all
 122KBUILD_CFLAGS           += -mno-string
 123
 124ifeq ($(CONFIG_6xx),y)
 125KBUILD_CFLAGS           += -mcpu=powerpc
 126endif
 127
 128# Work around a gcc code-gen bug with -fno-omit-frame-pointer.
 129ifeq ($(CONFIG_FUNCTION_TRACER),y)
 130KBUILD_CFLAGS           += -mno-sched-epilog
 131endif
 132
 133cpu-as-$(CONFIG_4xx)            += -Wa,-m405
 134cpu-as-$(CONFIG_6xx)            += -Wa,-maltivec
 135cpu-as-$(CONFIG_POWER4)         += -Wa,-maltivec
 136cpu-as-$(CONFIG_E500)           += -Wa,-me500
 137cpu-as-$(CONFIG_E200)           += -Wa,-me200
 138
 139KBUILD_AFLAGS += $(cpu-as-y)
 140KBUILD_CFLAGS += $(cpu-as-y)
 141
 142head-y                          := arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o
 143head-$(CONFIG_8xx)              := arch/powerpc/kernel/head_8xx.o
 144head-$(CONFIG_40x)              := arch/powerpc/kernel/head_40x.o
 145head-$(CONFIG_44x)              := arch/powerpc/kernel/head_44x.o
 146head-$(CONFIG_FSL_BOOKE)        := arch/powerpc/kernel/head_fsl_booke.o
 147
 148head-$(CONFIG_PPC64)            += arch/powerpc/kernel/entry_64.o
 149head-$(CONFIG_PPC_FPU)          += arch/powerpc/kernel/fpu.o
 150head-$(CONFIG_ALTIVEC)          += arch/powerpc/kernel/vector.o
 151
 152core-y                          += arch/powerpc/kernel/ \
 153                                   arch/powerpc/mm/ \
 154                                   arch/powerpc/lib/ \
 155                                   arch/powerpc/sysdev/ \
 156                                   arch/powerpc/platforms/ \
 157                                   arch/powerpc/math-emu/
 158core-$(CONFIG_XMON)             += arch/powerpc/xmon/
 159core-$(CONFIG_KVM)              += arch/powerpc/kvm/
 160
 161drivers-$(CONFIG_OPROFILE)      += arch/powerpc/oprofile/
 162
 163# Default to zImage, override when needed
 164all: zImage
 165
 166# With make 3.82 we cannot mix normal and wildcard targets
 167BOOT_TARGETS1 := zImage zImage.initrd uImage
 168BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.%
 169
 170PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
 171
 172boot := arch/$(ARCH)/boot
 173
 174ifeq ($(CONFIG_RELOCATABLE),y)
 175quiet_cmd_relocs_check = CALL    $<
 176      cmd_relocs_check = perl $< "$(OBJDUMP)" "$(obj)/vmlinux"
 177
 178PHONY += relocs_check
 179relocs_check: arch/powerpc/relocs_check.pl vmlinux
 180        $(call cmd,relocs_check)
 181
 182zImage: relocs_check
 183endif
 184
 185$(BOOT_TARGETS1): vmlinux
 186        $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 187$(BOOT_TARGETS2): vmlinux
 188        $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 189
 190
 191bootwrapper_install:
 192        $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 193
 194%.dtb:
 195        $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 196
 197define archhelp
 198  @echo '* zImage          - Build default images selected by kernel config'
 199  @echo '  zImage.*        - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
 200  @echo '  uImage          - U-Boot native image format'
 201  @echo '  cuImage.<dt>    - Backwards compatible U-Boot image for older'
 202  @echo '                    versions which do not support device trees'
 203  @echo '  dtbImage.<dt>   - zImage with an embedded device tree blob'
 204  @echo '  simpleImage.<dt> - Firmware independent image.'
 205  @echo '  treeImage.<dt>  - Support for older IBM 4xx firmware (not U-Boot)'
 206  @echo '  install         - Install kernel using'
 207  @echo '                    (your) ~/bin/$(INSTALLKERNEL) or'
 208  @echo '                    (distribution) /sbin/$(INSTALLKERNEL) or'
 209  @echo '                    install to $$(INSTALL_PATH) and run lilo'
 210  @echo '  *_defconfig     - Select default config from arch/$(ARCH)/configs'
 211  @echo ''
 212  @echo '  Targets with <dt> embed a device tree blob inside the image'
 213  @echo '  These targets support board with firmware that does not'
 214  @echo '  support passing a device tree directly.  Replace <dt> with the'
 215  @echo '  name of a dts file from the arch/$(ARCH)/boot/dts/ directory'
 216  @echo '  (minus the .dts extension).'
 217endef
 218
 219install:
 220        $(Q)$(MAKE) $(build)=$(boot) install
 221
 222vdso_install:
 223ifeq ($(CONFIG_PPC64),y)
 224        $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
 225endif
 226        $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
 227
 228archclean:
 229        $(Q)$(MAKE) $(clean)=$(boot)
 230
 231archprepare: checkbin
 232
 233# Use the file '.tmp_gas_check' for binutils tests, as gas won't output
 234# to stdout and these checks are run even on install targets.
 235TOUT    := .tmp_gas_check
 236# Ensure this is binutils 2.12.1 (or 2.12.90.0.7) or later for altivec
 237# instructions.
 238# gcc-3.4 and binutils-2.14 are a fatal combination.
 239
 240checkbin:
 241        @if test "$(call cc-version)" = "0304" ; then \
 242                if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
 243                        echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
 244                        echo 'correctly with gcc-3.4 and your version of binutils.'; \
 245                        echo '*** Please upgrade your binutils or downgrade your gcc'; \
 246                        false; \
 247                fi ; \
 248        fi
 249        @if test "$(call cc-fullversion)" = "040200" \
 250            && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
 251                echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
 252                echo 'kernel with modules enabled.' ; \
 253                echo -n '*** Please use a different GCC version or ' ; \
 254                echo 'disable kernel modules' ; \
 255                false ; \
 256        fi
 257        @if ! /bin/echo dssall | $(AS) -many -o $(TOUT) >/dev/null 2>&1 ; then \
 258                echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build ' ; \
 259                echo 'correctly with old versions of binutils.' ; \
 260                echo '*** Please upgrade your binutils to 2.12.1 or newer' ; \
 261                false ; \
 262        fi
 263
 264CLEAN_FILES += $(TOUT)
 265
 266
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