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 CROSS32AS               := $(CROSS32_COMPILE)as
  22 CROSS32LD               := $(CROSS32_COMPILE)ld
  23 CROSS32AR               := $(CROSS32_COMPILE)ar
  24 CROSS32OBJCOPY          := $(CROSS32_COMPILE)objcopy
  25
  26 ifeq ($(HAS_BIARCH),y)
  27 ifeq ($(CROSS32_COMPILE),)
  28 CROSS32CC       := $(CC) -m32
  29 CROSS32AS       := $(AS) -a32
  30 CROSS32LD       := $(LD) -m elf32ppc
  31 CROSS32OBJCOPY  := $(OBJCOPY)
  32 CROSS32AR       := GNUTARGET=elf32-powerpc $(AR)
  33 endif
  34 endif
  35
  36 export CROSS32CC CROSS32AS CROSS32LD CROSS32AR CROSS32OBJCOPY
  37
  38 ifeq ($(CROSS_COMPILE),)
  39 KBUILD_DEFCONFIG := $(shell uname -m)_defconfig
  40 else
  41 KBUILD_DEFCONFIG := ppc64_defconfig
  42 endif
  43
  44 ifeq ($(CONFIG_PPC64),y)
  45 OLDARCH := ppc64
  46
  47 new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
  48
  49 ifeq ($(new_nm),y)
  50 NM              := $(NM) --synthetic
  51 endif
  52
  53 else
  54 OLDARCH := ppc
  55 endif
  56
  57 # It seems there are times we use this Makefile without
  58 # including the config file, but this replicates the old behaviour
  59 ifeq ($(CONFIG_WORD_SIZE),)
  60 CONFIG_WORD_SIZE := 32
  61 endif
  62
  63 UTS_MACHINE := $(OLDARCH)
  64
  65 ifeq ($(HAS_BIARCH),y)
  66 override AS     += -a$(CONFIG_WORD_SIZE)
  67 override LD     += -m elf$(CONFIG_WORD_SIZE)ppc
  68 override CC     += -m$(CONFIG_WORD_SIZE)
  69 override AR     := GNUTARGET=elf$(CONFIG_WORD_SIZE)-powerpc $(AR)
  70 endif
  71
  72 LDFLAGS_vmlinux := -Bstatic
  73
  74 CPPFLAGS-$(CONFIG_PPC32) := -Iarch/$(ARCH)
  75 AFLAGS-$(CONFIG_PPC32)  := -Iarch/$(ARCH)
  76 CFLAGS-$(CONFIG_PPC64)  := -mminimal-toc -mtraceback=none  -mcall-aixdesc
  77 CFLAGS-$(CONFIG_PPC32)  := -Iarch/$(ARCH) -ffixed-r2 -mmultiple
  78 KBUILD_CPPFLAGS += $(CPPFLAGS-y)
  79 KBUILD_AFLAGS   += $(AFLAGS-y)
  80 KBUILD_CFLAGS   += -msoft-float -pipe $(CFLAGS-y)
  81 CPP             = $(CC) -E $(KBUILD_CFLAGS)
  82
  83 CHECKFLAGS      += -m$(CONFIG_WORD_SIZE) -D__powerpc__ -D__powerpc$(CONFIG_WORD_SIZE)__
  84
  85 ifeq ($(CONFIG_PPC64),y)
  86 GCC_BROKEN_VEC  := $(shell if [ $(call cc-version) -lt 0400 ] ; then echo "y"; fi)
  87
  88 ifeq ($(CONFIG_POWER4_ONLY),y)
  89 ifeq ($(CONFIG_ALTIVEC),y)
  90 ifeq ($(GCC_BROKEN_VEC),y)
  91         KBUILD_CFLAGS += $(call cc-option,-mcpu=970)
  92 else
  93         KBUILD_CFLAGS += $(call cc-option,-mcpu=power4)
  94 endif
  95 else
  96         KBUILD_CFLAGS += $(call cc-option,-mcpu=power4)
  97 endif
  98 else
  99         KBUILD_CFLAGS += $(call cc-option,-mtune=power4)
 100 endif
 101 endif
 102
 103 ifeq ($(CONFIG_TUNE_CELL),y)
 104         KBUILD_CFLAGS += $(call cc-option,-mtune=cell)
 105 endif
 106
 107 # No AltiVec instruction when building kernel
 108 KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
 109
 110 # Enable unit-at-a-time mode when possible. It shrinks the
 111 # kernel considerably.
 112 KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
 113
 114 # Never use string load/store instructions as they are
 115 # often slow when they are implemented at all
 116 KBUILD_CFLAGS           += -mno-string
 117
 118 ifeq ($(CONFIG_6xx),y)
 119 KBUILD_CFLAGS           += -mcpu=powerpc
 120 endif
 121
 122 cpu-as-$(CONFIG_4xx)            += -Wa,-m405
 123 cpu-as-$(CONFIG_6xx)            += -Wa,-maltivec
 124 cpu-as-$(CONFIG_POWER4)         += -Wa,-maltivec
 125 cpu-as-$(CONFIG_E500)           += -Wa,-me500
 126 cpu-as-$(CONFIG_E200)           += -Wa,-me200
 127
 128 KBUILD_AFLAGS += $(cpu-as-y)
 129 KBUILD_CFLAGS += $(cpu-as-y)
 130
 131 head-y                          := arch/powerpc/kernel/head_$(CONFIG_WORD_SIZE).o
 132 head-$(CONFIG_8xx)              := arch/powerpc/kernel/head_8xx.o
 133 head-$(CONFIG_40x)              := arch/powerpc/kernel/head_40x.o
 134 head-$(CONFIG_44x)              := arch/powerpc/kernel/head_44x.o
 135 head-$(CONFIG_FSL_BOOKE)        := arch/powerpc/kernel/head_fsl_booke.o
 136
 137 head-$(CONFIG_PPC64)            += arch/powerpc/kernel/entry_64.o
 138 head-$(CONFIG_PPC_FPU)          += arch/powerpc/kernel/fpu.o
 139
 140 core-y                          += arch/powerpc/kernel/ \
 141                                    arch/powerpc/mm/ \
 142                                    arch/powerpc/lib/ \
 143                                    arch/powerpc/sysdev/ \
 144                                    arch/powerpc/platforms/
 145 core-$(CONFIG_MATH_EMULATION)   += arch/powerpc/math-emu/
 146 core-$(CONFIG_XMON)             += arch/powerpc/xmon/
 147
 148 drivers-$(CONFIG_OPROFILE)      += arch/powerpc/oprofile/
 149
 150 # Default to zImage, override when needed
 151 defaultimage-y                  := zImage
 152 defaultimage-$(CONFIG_DEFAULT_UIMAGE) := uImage
 153 KBUILD_IMAGE := $(defaultimage-y)
 154 all: $(KBUILD_IMAGE)
 155
 156 CPPFLAGS_vmlinux.lds    := -Upowerpc
 157
 158 BOOT_TARGETS = zImage zImage.initrd uImage
 159
 160 PHONY += $(BOOT_TARGETS)
 161
 162 boot := arch/$(ARCH)/boot
 163
 164 $(BOOT_TARGETS): vmlinux
 165         $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 166
 167 define archhelp
 168   @echo '* zImage          - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
 169   @echo '  install         - Install kernel using'
 170   @echo '                    (your) ~/bin/installkernel or'
 171   @echo '                    (distribution) /sbin/installkernel or'
 172   @echo '                    install to $$(INSTALL_PATH) and run lilo'
 173   @echo '  *_defconfig     - Select default config from arch/$(ARCH)/configs'
 174 endef
 175
 176 install: vdso_install
 177         $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) install
 178
 179 vdso_install:
 180 ifeq ($(CONFIG_PPC64),y)
 181         $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
 182 endif
 183         $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
 184
 185 archclean:
 186         $(Q)$(MAKE) $(clean)=$(boot)
 187
 188 archprepare: checkbin
 189
 190 # Use the file '.tmp_gas_check' for binutils tests, as gas won't output
 191 # to stdout and these checks are run even on install targets.
 192 TOUT    := .tmp_gas_check
 193 # Ensure this is binutils 2.12.1 (or 2.12.90.0.7) or later for altivec
 194 # instructions.
 195 # gcc-3.4 and binutils-2.14 are a fatal combination.
 196
 197 checkbin:
 198         @if test "$(call cc-version)" = "0304" ; then \
 199                 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
 200                         echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
 201                         echo 'correctly with gcc-3.4 and your version of binutils.'; \
 202                         echo '*** Please upgrade your binutils or downgrade your gcc'; \
 203                         false; \
 204                 fi ; \
 205         fi
 206         @if test "$(call cc-fullversion)" = "040200" \
 207             && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \
 208                 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \
 209                 echo 'kernel with modules enabled.' ; \
 210                 echo -n '*** Please use a different GCC version or ' ; \
 211                 echo 'disable kernel modules' ; \
 212                 false ; \
 213         fi
 214         @if ! /bin/echo dssall | $(AS) -many -o $(TOUT) >/dev/null 2>&1 ; then \
 215                 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build ' ; \
 216                 echo 'correctly with old versions of binutils.' ; \
 217                 echo '*** Please upgrade your binutils to 2.12.1 or newer' ; \
 218                 false ; \
 219         fi
 220
 221 CLEAN_FILES += $(TOUT)
 222