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 SZ      := 64
  43
  44 new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
  45
  46 ifeq ($(new_nm),y)
  47 NM              := $(NM) --synthetic
  48 endif
  49
  50 else
  51 OLDARCH := ppc
  52 SZ      := 32
  53 endif
  54
  55 UTS_MACHINE := $(OLDARCH)
  56
  57 ifeq ($(HAS_BIARCH),y)
  58 override AS     += -a$(SZ)
  59 override LD     += -m elf$(SZ)ppc
  60 override CC     += -m$(SZ)
  61 override AR     := GNUTARGET=elf$(SZ)-powerpc $(AR)
  62 endif
  63
  64 LDFLAGS_vmlinux := -Bstatic
  65
  66 # The -Iarch/$(ARCH)/include is temporary while we are merging
  67 CPPFLAGS-$(CONFIG_PPC32) := -Iarch/$(ARCH) -Iarch/$(ARCH)/include
  68 AFLAGS-$(CONFIG_PPC32)  := -Iarch/$(ARCH)
  69 CFLAGS-$(CONFIG_PPC64)  := -mminimal-toc -mtraceback=none  -mcall-aixdesc
  70 CFLAGS-$(CONFIG_PPC32)  := -Iarch/$(ARCH) -ffixed-r2 -mmultiple
  71 CPPFLAGS        += $(CPPFLAGS-y)
  72 AFLAGS          += $(AFLAGS-y)
  73 CFLAGS          += -msoft-float -pipe $(CFLAGS-y)
  74 CPP             = $(CC) -E $(CFLAGS)
  75 # Temporary hack until we have migrated to asm-powerpc
  76 LINUXINCLUDE-$(CONFIG_PPC32)    := -Iarch/$(ARCH)/include
  77 LINUXINCLUDE    += $(LINUXINCLUDE-y)
  78
  79 CHECKFLAGS      += -m$(SZ) -D__powerpc__ -D__powerpc$(SZ)__
  80
  81 ifeq ($(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 # No AltiVec instruction when building kernel
 100 CFLAGS += $(call cc-option,-mno-altivec)
 101
 102 # Enable unit-at-a-time mode when possible. It shrinks the
 103 # kernel considerably.
 104 CFLAGS += $(call cc-option,-funit-at-a-time)
 105
 106 # Never use string load/store instructions as they are
 107 # often slow when they are implemented at all
 108 CFLAGS          += -mno-string
 109
 110 ifeq ($(CONFIG_6xx),y)
 111 CFLAGS          += -mcpu=powerpc
 112 endif
 113
 114 cpu-as-$(CONFIG_4xx)            += -Wa,-m405
 115 cpu-as-$(CONFIG_6xx)            += -Wa,-maltivec
 116 cpu-as-$(CONFIG_POWER4)         += -Wa,-maltivec
 117 cpu-as-$(CONFIG_E500)           += -Wa,-me500
 118 cpu-as-$(CONFIG_E200)           += -Wa,-me200
 119
 120 AFLAGS += $(cpu-as-y)
 121 CFLAGS += $(cpu-as-y)
 122
 123 head-y                          := arch/powerpc/kernel/head_32.o
 124 head-$(CONFIG_PPC64)            := arch/powerpc/kernel/head_64.o
 125 head-$(CONFIG_8xx)              := arch/powerpc/kernel/head_8xx.o
 126 head-$(CONFIG_4xx)              := arch/powerpc/kernel/head_4xx.o
 127 head-$(CONFIG_44x)              := arch/powerpc/kernel/head_44x.o
 128 head-$(CONFIG_FSL_BOOKE)        := arch/powerpc/kernel/head_fsl_booke.o
 129
 130 head-$(CONFIG_PPC64)            += arch/powerpc/kernel/entry_64.o
 131 head-$(CONFIG_PPC_FPU)          += arch/powerpc/kernel/fpu.o
 132
 133 core-y                          += arch/powerpc/kernel/ \
 134                                    arch/powerpc/mm/ \
 135                                    arch/powerpc/lib/ \
 136                                    arch/powerpc/sysdev/ \
 137                                    arch/powerpc/platforms/
 138 core-$(CONFIG_MATH_EMULATION)   += arch/powerpc/math-emu/
 139 core-$(CONFIG_XMON)             += arch/powerpc/xmon/
 140
 141 drivers-$(CONFIG_OPROFILE)      += arch/powerpc/oprofile/
 142
 143 # Default to zImage, override when needed
 144 defaultimage-y                  := zImage
 145 defaultimage-$(CONFIG_DEFAULT_UIMAGE) := uImage
 146 KBUILD_IMAGE := $(defaultimage-y)
 147 all: $(KBUILD_IMAGE)
 148
 149 CPPFLAGS_vmlinux.lds    := -Upowerpc
 150
 151 BOOT_TARGETS = zImage zImage.initrd zImage.dts zImage.dts_initrd uImage
 152
 153 PHONY += $(BOOT_TARGETS)
 154
 155 boot := arch/$(ARCH)/boot
 156
 157 $(BOOT_TARGETS): vmlinux
 158         $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 159
 160 define archhelp
 161   @echo '* zImage          - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
 162   @echo '  install         - Install kernel using'
 163   @echo '                    (your) ~/bin/installkernel or'
 164   @echo '                    (distribution) /sbin/installkernel or'
 165   @echo '                    install to $$(INSTALL_PATH) and run lilo'
 166   @echo '  *_defconfig     - Select default config from arch/$(ARCH)/configs'
 167 endef
 168
 169 install:
 170         $(Q)$(MAKE) $(build)=$(boot) BOOTIMAGE=$(KBUILD_IMAGE) install
 171
 172 archclean:
 173         $(Q)$(MAKE) $(clean)=$(boot)
 174
 175 archmrproper:
 176         $(Q)rm -rf arch/$(ARCH)/include
 177
 178 archprepare: checkbin
 179
 180 ifeq ($(CONFIG_PPC32),y)
 181 # Temporary hack until we have migrated to asm-powerpc
 182 include/asm: arch/$(ARCH)/include/asm
 183 arch/$(ARCH)/include/asm: FORCE
 184         $(Q)if [ ! -d arch/$(ARCH)/include ]; then mkdir -p arch/$(ARCH)/include; fi
 185         $(Q)ln -fsn $(srctree)/include/asm-$(OLDARCH) arch/$(ARCH)/include/asm
 186 endif
 187
 188 # Use the file '.tmp_gas_check' for binutils tests, as gas won't output
 189 # to stdout and these checks are run even on install targets.
 190 TOUT    := .tmp_gas_check
 191 # Ensure this is binutils 2.12.1 (or 2.12.90.0.7) or later for altivec
 192 # instructions.
 193 # gcc-3.4 and binutils-2.14 are a fatal combination.
 194
 195 checkbin:
 196         @if test "$(call cc-version)" = "0304" ; then \
 197                 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
 198                         echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
 199                         echo 'correctly with gcc-3.4 and your version of binutils.'; \
 200                         echo '*** Please upgrade your binutils or downgrade your gcc'; \
 201                         false; \
 202                 fi ; \
 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