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