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 := $(LDFLAGS_vmlinux-y)
  69
  70ifeq ($(CONFIG_PPC64),y)
  71ifeq ($(call cc-option-yn,-mcmodel=medium),y)
  72        # -mcmodel=medium breaks modules because it uses 32bit offsets from
  73        # the TOC pointer to create pointers where possible. Pointers into the
  74        # percpu data area are created by this method.
  75        #
  76        # The kernel module loader relocates the percpu data section from the
  77        # original location (starting with 0xd...) to somewhere in the base
  78        # kernel percpu data space (starting with 0xc...). We need a full
  79        # 64bit relocation for this to work, hence -mcmodel=large.
  80        KBUILD_CFLAGS_MODULE += -mcmodel=large
  81else
  82        export NO_MINIMAL_TOC := -mno-minimal-toc
  83endif
  84endif
  85
  86CFLAGS-$(CONFIG_PPC64)  := -mtraceback=no -mcall-aixdesc
  87CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mcmodel=medium,-mminimal-toc)
  88CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mno-pointers-to-nested-functions)
  89CFLAGS-$(CONFIG_PPC32)  := -ffixed-r2 -mmultiple
  90
  91CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,-mtune=power4)
  92CFLAGS-$(CONFIG_CELL_CPU) += $(call cc-option,-mcpu=cell)
  93CFLAGS-$(CONFIG_POWER4_CPU) += $(call cc-option,-mcpu=power4)
  94CFLAGS-$(CONFIG_POWER5_CPU) += $(call cc-option,-mcpu=power5)
  95CFLAGS-$(CONFIG_POWER6_CPU) += $(call cc-option,-mcpu=power6)
  96CFLAGS-$(CONFIG_POWER7_CPU) += $(call cc-option,-mcpu=power7)
  97
  98CFLAGS-$(CONFIG_TUNE_CELL) += $(call cc-option,-mtune=cell)
  99
 100KBUILD_CPPFLAGS += -Iarch/$(ARCH)
 101KBUILD_AFLAGS   += -Iarch/$(ARCH)
 102KBUILD_CFLAGS   += -msoft-float -pipe -Iarch/$(ARCH) $(CFLAGS-y)
 103CPP             = $(CC) -E $(KBUILD_CFLAGS)
 104
 105CHECKFLAGS      += -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__
 106
 107KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
 108
 109# No AltiVec or VSX instructions when building kernel
 110KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
 111KBUILD_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)
 115KBUILD_CFLAGS += $(call cc-option,-mno-spe)
 116KBUILD_CFLAGS += $(call cc-option,-mspe=no)
 117
 118# Enable unit-at-a-time mode when possible. It shrinks the
 119# kernel considerably.
 120KBUILD_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
 125KBUILD_CFLAGS   += $(call cc-option,-fno-dwarf2-cfi-asm)
 126
 127# Never use string load/store instructions as they are
 128# often slow when they are implemented at all
 129KBUILD_CFLAGS           += -mno-string
 130
 131ifeq ($(CONFIG_6xx),y)
 132KBUILD_CFLAGS           += -mcpu=powerpc
 133endif
 134
 135# Work around a gcc code-gen bug with -fno-omit-frame-pointer.
 136ifeq ($(CONFIG_FUNCTION_TRACER),y)
 137KBUILD_CFLAGS           += -mno-sched-epilog
 138endif
 139
 140cpu-as-$(CONFIG_4xx)            += -Wa,-m405
 141cpu-as-$(CONFIG_ALTIVEC)        += -Wa,-maltivec
 142cpu-as-$(CONFIG_E500)           += -Wa,-me500
 143cpu-as-$(CONFIG_E200)           += -Wa,-me200
 144
 145KBUILD_AFLAGS += $(cpu-as-y)
 146KBUILD_CFLAGS += $(cpu-as-y)
 147
 148head-y                          := arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o
 149head-$(CONFIG_8xx)              := arch/powerpc/kernel/head_8xx.o
 150head-$(CONFIG_40x)              := arch/powerpc/kernel/head_40x.o
 151head-$(CONFIG_44x)              := arch/powerpc/kernel/head_44x.o
 152head-$(CONFIG_FSL_BOOKE)        := arch/powerpc/kernel/head_fsl_booke.o
 153
 154head-$(CONFIG_PPC64)            += arch/powerpc/kernel/entry_64.o
 155head-$(CONFIG_PPC_FPU)          += arch/powerpc/kernel/fpu.o
 156head-$(CONFIG_ALTIVEC)          += arch/powerpc/kernel/vector.o
 157head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE)  += arch/powerpc/kernel/prom_init.o
 158
 159core-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/
 167core-$(CONFIG_XMON)             += arch/powerpc/xmon/
 168core-$(CONFIG_KVM)              += arch/powerpc/kvm/
 169core-$(CONFIG_PERF_EVENTS)      += arch/powerpc/perf/
 170
 171drivers-$(CONFIG_OPROFILE)      += arch/powerpc/oprofile/
 172
 173# Default to zImage, override when needed
 174all: zImage
 175
 176# With make 3.82 we cannot mix normal and wildcard targets
 177BOOT_TARGETS1 := zImage zImage.initrd uImage
 178BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
 179
 180PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
 181
 182boot := arch/$(ARCH)/boot
 183
 184ifeq ($(CONFIG_RELOCATABLE),y)
 185quiet_cmd_relocs_check = CALL    $<
 186      cmd_relocs_check = perl $< "$(OBJDUMP)" "$(obj)/vmlinux"
 187
 188PHONY += relocs_check
 189relocs_check: arch/powerpc/relocs_check.pl vmlinux
 190        $(call cmd,relocs_check)
 191
 192zImage: relocs_check
 193endif
 194
 195$(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
 201bootwrapper_install:
 202        $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 203
 204%.dtb: scripts
 205        $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 206
 207define archhelp
 208  @echo '* zImage          - Build default images selected by kernel config'
 209  @echo '  zImage.*        - Compressed kernel image (arch/$(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).'
 227endef
 228
 229install:
 230        $(Q)$(MAKE) $(build)=$(boot) install
 231
 232vdso_install:
 233ifeq ($(CONFIG_PPC64),y)
 234        $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
 235endif
 236        $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
 237
 238archclean:
 239        $(Q)$(MAKE) $(clean)=$(boot)
 240
 241archprepare: 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.
 245TOUT    := .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
 251checkbin:
 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
 275CLEAN_FILES += $(TOUT)
 276
 277