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 CROSS32OBJCOPY          := $(CROSS32_COMPILE)objcopy
  24
  25 ifeq ($(HAS_BIARCH),y)
  26 ifeq ($(CROSS32_COMPILE),)
  27 CROSS32CC       := $(CC) -m32
  28 CROSS32AS       := $(AS) -a32
  29 CROSS32LD       := $(LD) -m elf32ppc
  30 CROSS32OBJCOPY  := $(OBJCOPY)
  31 endif
  32 endif
  33
  34 export CROSS32CC CROSS32AS CROSS32LD CROSS32OBJCOPY
  35
  36 KBUILD_DEFCONFIG := $(shell uname -m)_defconfig
  37
  38 ifeq ($(CONFIG_PPC64),y)
  39 OLDARCH := ppc64
  40 SZ      := 64
  41
  42 new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
  43
  44 ifeq ($(new_nm),y)
  45 NM              := $(NM) --synthetic
  46 endif
  47
  48 else
  49 OLDARCH := ppc
  50 SZ      := 32
  51 endif
  52
  53 UTS_MACHINE := $(OLDARCH)
  54
  55 ifeq ($(HAS_BIARCH),y)
  56 override AS     += -a$(SZ)
  57 override LD     += -m elf$(SZ)ppc
  58 override CC     += -m$(SZ)
  59 endif
  60
  61 LDFLAGS_vmlinux := -Bstatic
  62
  63 # The -Iarch/$(ARCH)/include is temporary while we are merging
  64 CPPFLAGS-$(CONFIG_PPC32) := -Iarch/$(ARCH) -Iarch/$(ARCH)/include
  65 AFLAGS-$(CONFIG_PPC32)  := -Iarch/$(ARCH)
  66 CFLAGS-$(CONFIG_PPC64)  := -mminimal-toc -mtraceback=none  -mcall-aixdesc
  67 CFLAGS-$(CONFIG_PPC32)  := -Iarch/$(ARCH) -ffixed-r2 -mmultiple
  68 CPPFLAGS        += $(CPPFLAGS-y)
  69 AFLAGS          += $(AFLAGS-y)
  70 CFLAGS          += -msoft-float -pipe $(CFLAGS-y)
  71 CPP             = $(CC) -E $(CFLAGS)
  72 # Temporary hack until we have migrated to asm-powerpc
  73 LINUXINCLUDE-$(CONFIG_PPC32)    := -Iarch/$(ARCH)/include
  74 LINUXINCLUDE    += $(LINUXINCLUDE-y)
  75
  76 CHECKFLAGS      += -m$(SZ) -D__powerpc__ -D__powerpc$(SZ)__
  77
  78 ifeq ($(CONFIG_PPC64),y)
  79 GCC_BROKEN_VEC  := $(shell if [ $(call cc-version) -lt 0400 ] ; then echo "y"; fi)
  80
  81 ifeq ($(CONFIG_POWER4_ONLY),y)
  82 ifeq ($(CONFIG_ALTIVEC),y)
  83 ifeq ($(GCC_BROKEN_VEC),y)
  84         CFLAGS += $(call cc-option,-mcpu=970)
  85 else
  86         CFLAGS += $(call cc-option,-mcpu=power4)
  87 endif
  88 else
  89         CFLAGS += $(call cc-option,-mcpu=power4)
  90 endif
  91 else
  92         CFLAGS += $(call cc-option,-mtune=power4)
  93 endif
  94 endif
  95
  96 # No AltiVec instruction when building kernel
  97 CFLAGS += $(call cc-option,-mno-altivec)
  98
  99 # Enable unit-at-a-time mode when possible. It shrinks the
 100 # kernel considerably.
 101 CFLAGS += $(call cc-option,-funit-at-a-time)
 102
 103 ifndef CONFIG_FSL_BOOKE
 104 CFLAGS          += -mstring
 105 endif
 106
 107 ifeq ($(CONFIG_6xx),y)
 108 CFLAGS          += -mcpu=powerpc
 109 endif
 110
 111 cpu-as-$(CONFIG_PPC64BRIDGE)    += -Wa,-mppc64bridge
 112 cpu-as-$(CONFIG_4xx)            += -Wa,-m405
 113 cpu-as-$(CONFIG_6xx)            += -Wa,-maltivec
 114 cpu-as-$(CONFIG_POWER4)         += -Wa,-maltivec
 115 cpu-as-$(CONFIG_E500)           += -Wa,-me500
 116 cpu-as-$(CONFIG_E200)           += -Wa,-me200
 117
 118 AFLAGS += $(cpu-as-y)
 119 CFLAGS += $(cpu-as-y)
 120
 121 head-y                          := arch/powerpc/kernel/head_32.o
 122 head-$(CONFIG_PPC64)            := arch/powerpc/kernel/head_64.o
 123 head-$(CONFIG_8xx)              := arch/powerpc/kernel/head_8xx.o
 124 head-$(CONFIG_4xx)              := arch/powerpc/kernel/head_4xx.o
 125 head-$(CONFIG_44x)              := arch/powerpc/kernel/head_44x.o
 126 head-$(CONFIG_FSL_BOOKE)        := arch/powerpc/kernel/head_fsl_booke.o
 127
 128 head-$(CONFIG_PPC64)            += arch/powerpc/kernel/entry_64.o
 129 head-$(CONFIG_PPC_FPU)          += arch/powerpc/kernel/fpu.o
 130
 131 core-y                          += arch/powerpc/kernel/ \
 132                                    arch/powerpc/mm/ \
 133                                    arch/powerpc/lib/ \
 134                                    arch/powerpc/sysdev/ \
 135                                    arch/powerpc/platforms/
 136 core-$(CONFIG_MATH_EMULATION)   += arch/powerpc/math-emu/
 137 core-$(CONFIG_XMON)             += arch/powerpc/xmon/
 138
 139 drivers-$(CONFIG_OPROFILE)      += arch/powerpc/oprofile/
 140
 141 # Default to zImage, override when needed
 142 defaultimage-y                  := zImage
 143 defaultimage-$(CONFIG_PPC_ISERIES) := vmlinux
 144 defaultimage-$(CONFIG_DEFAULT_UIMAGE) := uImage
 145 KBUILD_IMAGE := $(defaultimage-y)
 146 all: $(KBUILD_IMAGE)
 147
 148 CPPFLAGS_vmlinux.lds    := -Upowerpc
 149
 150 BOOT_TARGETS = zImage zImage.initrd znetboot znetboot.initrd vmlinux.sm uImage vmlinux.bin
 151
 152 PHONY += $(BOOT_TARGETS)
 153
 154 boot := arch/$(ARCH)/boot
 155
 156 $(BOOT_TARGETS): vmlinux
 157         $(Q)$(MAKE) ARCH=ppc64 $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 158
 159 define archhelp
 160   @echo '* zImage          - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)'
 161   @echo '  install         - Install kernel using'
 162   @echo '                    (your) ~/bin/installkernel or'
 163   @echo '                    (distribution) /sbin/installkernel or'
 164   @echo '                    install to $$(INSTALL_PATH) and run lilo'
 165   @echo '  *_defconfig     - Select default config from arch/$(ARCH)/configs'
 166 endef
 167
 168 archclean:
 169         $(Q)$(MAKE) $(clean)=$(boot)
 170
 171 archmrproper:
 172         $(Q)rm -rf arch/$(ARCH)/include
 173
 174 archprepare: checkbin
 175
 176 ifeq ($(CONFIG_PPC32),y)
 177 # Temporary hack until we have migrated to asm-powerpc
 178 include/asm: arch/$(ARCH)/include/asm
 179 arch/$(ARCH)/include/asm: FORCE
 180         $(Q)if [ ! -d arch/$(ARCH)/include ]; then mkdir -p arch/$(ARCH)/include; fi
 181         $(Q)ln -fsn $(srctree)/include/asm-$(OLDARCH) arch/$(ARCH)/include/asm
 182 endif
 183
 184 # Use the file '.tmp_gas_check' for binutils tests, as gas won't output
 185 # to stdout and these checks are run even on install targets.
 186 TOUT    := .tmp_gas_check
 187 # Ensure this is binutils 2.12.1 (or 2.12.90.0.7) or later for altivec
 188 # instructions.
 189 # gcc-3.4 and binutils-2.14 are a fatal combination.
 190
 191 checkbin:
 192         @if test "$(call cc-version)" = "0304" ; then \
 193                 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
 194                         echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
 195                         echo 'correctly with gcc-3.4 and your version of binutils.'; \
 196                         echo '*** Please upgrade your binutils or downgrade your gcc'; \
 197                         false; \
 198                 fi ; \
 199         fi
 200         @if ! /bin/echo dssall | $(AS) -many -o $(TOUT) >/dev/null 2>&1 ; then \
 201                 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build ' ; \
 202                 echo 'correctly with old versions of binutils.' ; \
 203                 echo '*** Please upgrade your binutils to 2.12.1 or newer' ; \
 204                 false ; \
 205         fi
 206
 207 CLEAN_FILES += $(TOUT)
 208