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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
  15 # This must match PAGE_OFFSET in include/asm-powerpc/page.h.
  16 KERNELLOAD      := $(CONFIG_KERNEL_START)
  17
  18 HAS_BIARCH      := $(call cc-option-yn, -m32)
  19
  20 ifeq ($(CONFIG_PPC64),y)
  21 SZ      := 64
  22
  23 # Set default 32 bits cross compilers for vdso and boot wrapper
  24 CROSS32_COMPILE ?=
  25
  26 CROSS32CC               := $(CROSS32_COMPILE)gcc
  27 CROSS32AS               := $(CROSS32_COMPILE)as
  28 CROSS32LD               := $(CROSS32_COMPILE)ld
  29 CROSS32OBJCOPY          := $(CROSS32_COMPILE)objcopy
  30
  31 ifeq ($(HAS_BIARCH),y)
  32 ifeq ($(CROSS32_COMPILE),)
  33 CROSS32CC       := $(CC) -m32
  34 CROSS32AS       := $(AS) -a32
  35 CROSS32LD       := $(LD) -m elf32ppc
  36 CROSS32OBJCOPY  := $(OBJCOPY)
  37 endif
  38 endif
  39
  40 export CROSS32CC CROSS32AS CROSS32LD CROSS32OBJCOPY
  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              := $(NM) --synthetic
  46 endif
  47
  48 else
  49 SZ      := 32
  50 endif
  51
  52 ifeq ($(HAS_BIARCH),y)
  53 override AS     += -a$(SZ)
  54 override LD     += -m elf$(SZ)ppc
  55 override CC     += -m$(SZ)
  56 endif
  57
  58 LDFLAGS_vmlinux := -Ttext $(KERNELLOAD) -Bstatic -e $(KERNELLOAD)
  59
  60 # The -Iarch/$(ARCH)/include is temporary while we are merging
  61 CPPFLAGS        += -Iarch/$(ARCH) -Iarch/$(ARCH)/include
  62 AFLAGS          += -Iarch/$(ARCH)
  63 CFLAGS          += -Iarch/$(ARCH) -msoft-float -pipe
  64 ifeq ($(CONFIG_PPC64),y)
  65 CFLAGS          += -mminimal-toc -mtraceback=none  -mcall-aixdesc
  66 else
  67 CFLAGS          += -ffixed-r2 -mmultiple
  68 endif
  69 CPP             = $(CC) -E $(CFLAGS)
  70 # Temporary hack until we have migrated to asm-powerpc
  71 LINUXINCLUDE    += -Iarch/$(ARCH)/include
  72
  73 CHECKFLAGS      += -m$(SZ) -D__powerpc__ -D__powerpc$(SZ)__
  74
  75 ifeq ($(CONFIG_PPC64),y)
  76 GCC_VERSION     := $(call cc-version)
  77 GCC_BROKEN_VEC  := $(shell if [ $(GCC_VERSION) -lt 0400 ] ; then echo "y"; fi)
  78
  79 ifeq ($(CONFIG_POWER4_ONLY),y)
  80 ifeq ($(CONFIG_ALTIVEC),y)
  81 ifeq ($(GCC_BROKEN_VEC),y)
  82         CFLAGS += $(call cc-option,-mcpu=970)
  83 else
  84         CFLAGS += $(call cc-option,-mcpu=power4)
  85 endif
  86 else
  87         CFLAGS += $(call cc-option,-mcpu=power4)
  88 endif
  89 else
  90         CFLAGS += $(call cc-option,-mtune=power4)
  91 endif
  92 endif
  93
  94 # Enable unit-at-a-time mode when possible. It shrinks the
  95 # kernel considerably.
  96 CFLAGS += $(call cc-option,-funit-at-a-time)
  97
  98 ifndef CONFIG_FSL_BOOKE
  99 CFLAGS          += -mstring
 100 endif
 101
 102 cpu-as-$(CONFIG_PPC64BRIDGE)    += -Wa,-mppc64bridge
 103 cpu-as-$(CONFIG_4xx)            += -Wa,-m405
 104 cpu-as-$(CONFIG_6xx)            += -Wa,-maltivec
 105 cpu-as-$(CONFIG_POWER4)         += -Wa,-maltivec
 106 cpu-as-$(CONFIG_E500)           += -Wa,-me500
 107 cpu-as-$(CONFIG_E200)           += -Wa,-me200
 108
 109 AFLAGS += $(cpu-as-y)
 110 CFLAGS += $(cpu-as-y)
 111
 112 # Default to the common case.
 113 KBUILD_DEFCONFIG := common_defconfig
 114
 115 head-y                          := arch/powerpc/kernel/head.o
 116 head-$(CONFIG_PPC64)            := arch/powerpc/kernel/head_64.o
 117 head-$(CONFIG_8xx)              := arch/powerpc/kernel/head_8xx.o
 118 head-$(CONFIG_4xx)              := arch/powerpc/kernel/head_4xx.o
 119 head-$(CONFIG_44x)              := arch/powerpc/kernel/head_44x.o
 120 head-$(CONFIG_FSL_BOOKE)        := arch/powerpc/kernel/head_fsl_booke.o
 121
 122 ifeq ($(CONFIG_PPC32),y)
 123 head-$(CONFIG_6xx)              += arch/powerpc/kernel/idle_6xx.o
 124 head-$(CONFIG_POWER4)           += arch/powerpc/kernel/idle_power4.o
 125 head-$(CONFIG_PPC_FPU)          += arch/powerpc/kernel/fpu.o
 126 endif
 127
 128 core-y                          += arch/powerpc/kernel/ \
 129                                    arch/powerpc/mm/ \
 130                                    arch/powerpc/lib/ \
 131                                    arch/powerpc/sysdev/
 132 core-$(CONFIG_PPC32)            += arch/ppc/kernel/ \
 133                                    arch/ppc/syslib/
 134 core-$(CONFIG_PPC64)            += arch/ppc64/kernel/
 135 core-$(CONFIG_PPC_PMAC)         += arch/powerpc/platforms/powermac/
 136 core-$(CONFIG_4xx)              += arch/ppc/platforms/4xx/
 137 core-$(CONFIG_83xx)             += arch/ppc/platforms/83xx/
 138 core-$(CONFIG_85xx)             += arch/ppc/platforms/85xx/
 139 core-$(CONFIG_MATH_EMULATION)   += arch/ppc/math-emu/
 140 core-$(CONFIG_XMON)             += arch/powerpc/xmon/
 141 core-$(CONFIG_APUS)             += arch/ppc/amiga/
 142 drivers-$(CONFIG_8xx)           += arch/ppc/8xx_io/
 143 drivers-$(CONFIG_4xx)           += arch/ppc/4xx_io/
 144 drivers-$(CONFIG_CPM2)          += arch/ppc/8260_io/
 145
 146 drivers-$(CONFIG_OPROFILE)      += arch/powerpc/oprofile/
 147
 148 BOOT_TARGETS = zImage zImage.initrd znetboot znetboot.initrd vmlinux.sm
 149
 150 .PHONY: $(BOOT_TARGETS)
 151
 152 all: uImage zImage
 153
 154 CPPFLAGS_vmlinux.lds    := -Upowerpc
 155
 156 # All the instructions talk about "make bzImage".
 157 bzImage: zImage
 158
 159 boot := arch/$(ARCH)/boot
 160
 161 $(BOOT_TARGETS): vmlinux
 162         $(Q)$(MAKE) $(build)=$(boot) $@
 163
 164 uImage: vmlinux
 165         $(Q)$(MAKE) $(build)=$(boot)/images $(boot)/images/$@
 166
 167 define archhelp
 168   @echo '* zImage          - Compressed kernel image (arch/$(ARCH)/boot/images/zImage.*)'
 169   @echo '  uImage          - Create a bootable image for U-Boot / PPCBoot'
 170   @echo '  install         - Install kernel using'
 171   @echo '                    (your) ~/bin/installkernel or'
 172   @echo '                    (distribution) /sbin/installkernel or'
 173   @echo '                    install to $$(INSTALL_PATH) and run lilo'
 174   @echo '  *_defconfig     - Select default config from arch/$(ARCH)/ppc/configs'
 175 endef
 176
 177 archclean:
 178         $(Q)$(MAKE) $(clean)=arch/ppc/boot
 179         # Temporary hack until we have migrated to asm-powerpc
 180         $(Q)rm -rf arch/$(ARCH)/include
 181
 182 archprepare: checkbin
 183
 184 # Temporary hack until we have migrated to asm-powerpc
 185 ifeq ($(CONFIG_PPC64),y)
 186 include/asm: arch/$(ARCH)/include/asm
 187 arch/$(ARCH)/include/asm:
 188         $(Q)if [ ! -d arch/$(ARCH)/include ]; then mkdir -p arch/$(ARCH)/include; fi
 189         $(Q)ln -fsn $(srctree)/include/asm-ppc64 arch/$(ARCH)/include/asm
 190 else
 191 include/asm: arch/$(ARCH)/include/asm
 192 arch/$(ARCH)/include/asm:
 193         $(Q)if [ ! -d arch/$(ARCH)/include ]; then mkdir -p arch/$(ARCH)/include; fi
 194         $(Q)ln -fsn $(srctree)/include/asm-ppc arch/$(ARCH)/include/asm
 195 endif
 196
 197 # Use the file '.tmp_gas_check' for binutils tests, as gas won't output
 198 # to stdout and these checks are run even on install targets.
 199 TOUT    := .tmp_gas_check
 200 # Ensure this is binutils 2.12.1 (or 2.12.90.0.7) or later for altivec
 201 # instructions.
 202 # gcc-3.4 and binutils-2.14 are a fatal combination.
 203 GCC_VERSION     := $(call cc-version)
 204
 205 checkbin:
 206         @if test "$(GCC_VERSION)" = "0304" ; then \
 207                 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \
 208                         echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \
 209                         echo 'correctly with gcc-3.4 and your version of binutils.'; \
 210                         echo '*** Please upgrade your binutils or downgrade your gcc'; \
 211                         false; \
 212                 fi ; \
 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