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.
   3 #
   4 # This file is subject to the terms and conditions of the GNU General Public
   5 # License.  See the file "COPYING" in the main directory of this archive
   6 # for more details.
   7 #
   8 # Copyright (C) 1994 by Linus Torvalds
   9 # Changes for PPC by Gary Thomas
  10 # Rewritten by Cort Dougan and Paul Mackerras
  11 #
  12
  13 ifdef cross_compiling
  14   ifeq ($(CROSS_COMPILE),)
  15     # Auto detect cross compiler prefix.
  16     # Look for: (powerpc(64(le)?)?)(-unknown)?-linux(-gnu)?-
  17     CC_ARCHES := powerpc powerpc64 powerpc64le
  18     CC_SUFFIXES := linux linux-gnu unknown-linux-gnu
  19     CROSS_COMPILE := $(call cc-cross-prefix, $(foreach a,$(CC_ARCHES), \
  20                        $(foreach s,$(CC_SUFFIXES),$(a)-$(s)-)))
  21   endif
  22 endif
  23
  24 HAS_BIARCH      := $(call cc-option-yn, -m32)
  25
  26 # Set default 32 bits cross compilers for vdso and boot wrapper
  27 CROSS32_COMPILE ?=
  28
  29 # If we're on a ppc/ppc64/ppc64le machine use that defconfig, otherwise just use
  30 # ppc64le_defconfig because we have nothing better to go on.
  31 uname := $(shell uname -m)
  32 KBUILD_DEFCONFIG := $(if $(filter ppc%,$(uname)),$(uname),ppc64le)_defconfig
  33
  34 new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi)
  35
  36 ifeq ($(new_nm),y)
  37 NM              := $(NM) --synthetic
  38 endif
  39
  40 # BITS is used as extension for files which are available in a 32 bit
  41 # and a 64 bit version to simplify shared Makefiles.
  42 # e.g.: obj-y += foo_$(BITS).o
  43 export BITS
  44
  45 ifdef CONFIG_PPC64
  46         BITS := 64
  47 else
  48         BITS := 32
  49 endif
  50
  51 machine-y = ppc
  52 machine-$(CONFIG_PPC64) += 64
  53 machine-$(CONFIG_CPU_LITTLE_ENDIAN) += le
  54 UTS_MACHINE := $(subst $(space),,$(machine-y))
  55
  56 ifeq ($(CONFIG_PPC64)$(CONFIG_LD_IS_BFD),yy)
  57 # Have the linker provide sfpr if possible.
  58 # There is a corresponding test in arch/powerpc/lib/Makefile
  59 KBUILD_LDFLAGS_MODULE += --save-restore-funcs
  60 else
  61 KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o
  62 endif
  63
  64 ifdef CONFIG_CPU_LITTLE_ENDIAN
  65 KBUILD_CPPFLAGS += -mlittle-endian
  66 KBUILD_LDFLAGS  += -EL
  67 LDEMULATION     := lppc
  68 GNUTARGET       := powerpcle
  69 MULTIPLEWORD    := -mno-multiple
  70 KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect)
  71 else
  72 KBUILD_CPPFLAGS += $(call cc-option,-mbig-endian)
  73 KBUILD_LDFLAGS  += -EB
  74 LDEMULATION     := ppc
  75 GNUTARGET       := powerpc
  76 MULTIPLEWORD    := -mmultiple
  77 endif
  78
  79 ifdef CONFIG_PPC64
  80 ifndef CONFIG_CC_IS_CLANG
  81 cflags-$(CONFIG_PPC64_ELF_ABI_V1)       += $(call cc-option,-mabi=elfv1)
  82 cflags-$(CONFIG_PPC64_ELF_ABI_V1)       += $(call cc-option,-mcall-aixdesc)
  83 aflags-$(CONFIG_PPC64_ELF_ABI_V1)       += $(call cc-option,-mabi=elfv1)
  84 aflags-$(CONFIG_PPC64_ELF_ABI_V2)       += -mabi=elfv2
  85 endif
  86 endif
  87
  88 ifndef CONFIG_CC_IS_CLANG
  89   cflags-$(CONFIG_CPU_LITTLE_ENDIAN)    += -mno-strict-align
  90 endif
  91
  92 cflags-$(CONFIG_CPU_BIG_ENDIAN)         += $(call cc-option,-mbig-endian)
  93 cflags-$(CONFIG_CPU_LITTLE_ENDIAN)      += -mlittle-endian
  94 aflags-$(CONFIG_CPU_BIG_ENDIAN)         += $(call cc-option,-mbig-endian)
  95 aflags-$(CONFIG_CPU_LITTLE_ENDIAN)      += -mlittle-endian
  96
  97 ifeq ($(HAS_BIARCH),y)
  98 KBUILD_CPPFLAGS += -m$(BITS)
  99 KBUILD_AFLAGS   += -m$(BITS)
 100 KBUILD_LDFLAGS  += -m elf$(BITS)$(LDEMULATION)
 101 endif
 102
 103 LDFLAGS_vmlinux-y := -Bstatic
 104 LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie
 105 LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) += -z notext
 106 LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y)
 107
 108 ifdef CONFIG_PPC64
 109 ifndef CONFIG_PPC_KERNEL_PCREL
 110         # -mcmodel=medium breaks modules because it uses 32bit offsets from
 111         # the TOC pointer to create pointers where possible. Pointers into the
 112         # percpu data area are created by this method.
 113         #
 114         # The kernel module loader relocates the percpu data section from the
 115         # original location (starting with 0xd...) to somewhere in the base
 116         # kernel percpu data space (starting with 0xc...). We need a full
 117         # 64bit relocation for this to work, hence -mcmodel=large.
 118         KBUILD_CFLAGS_MODULE += -mcmodel=large
 119 endif
 120 endif
 121
 122 CFLAGS-$(CONFIG_PPC64)  := $(call cc-option,-mtraceback=no)
 123 ifdef CONFIG_PPC64_ELF_ABI_V2
 124 CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc))
 125 else
 126 ifndef CONFIG_CC_IS_CLANG
 127 CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mabi=elfv1)
 128 CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mcall-aixdesc)
 129 endif
 130 endif
 131 CFLAGS-$(CONFIG_PPC64)  += -mcmodel=medium
 132 CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mno-pointers-to-nested-functions)
 133 CFLAGS-$(CONFIG_PPC64)  += $(call cc-option,-mlong-double-128)
 134
 135 # Clang unconditionally reserves r2 on ppc32 and does not support the flag
 136 # https://llvm.org/pr39555
 137 CFLAGS-$(CONFIG_PPC32)  := $(call cc-option, -ffixed-r2)
 138
 139 # Clang doesn't support -mmultiple / -mno-multiple
 140 # https://llvm.org/pr39556
 141 CFLAGS-$(CONFIG_PPC32)  += $(call cc-option, $(MULTIPLEWORD))
 142
 143 CFLAGS-$(CONFIG_PPC32)  += $(call cc-option,-mno-readonly-in-sdata)
 144
 145 CC_FLAGS_FPU            := $(call cc-option,-mhard-float)
 146 CC_FLAGS_NO_FPU         := $(call cc-option,-msoft-float)
 147
 148 ifdef CONFIG_FUNCTION_TRACER
 149 ifdef CONFIG_ARCH_USING_PATCHABLE_FUNCTION_ENTRY
 150 KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY
 151 ifdef CONFIG_PPC_FTRACE_OUT_OF_LINE
 152 CC_FLAGS_FTRACE := -fpatchable-function-entry=1
 153 else
 154 ifdef CONFIG_DYNAMIC_FTRACE_WITH_CALL_OPS # PPC32 only
 155 CC_FLAGS_FTRACE := -fpatchable-function-entry=3,1
 156 else
 157 CC_FLAGS_FTRACE := -fpatchable-function-entry=2
 158 endif
 159 endif
 160 else
 161 CC_FLAGS_FTRACE := -pg
 162 ifdef CONFIG_MPROFILE_KERNEL
 163 CC_FLAGS_FTRACE += -mprofile-kernel
 164 endif
 165 endif
 166 endif
 167
 168 CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += -mcpu=$(CONFIG_TARGET_CPU)
 169 AFLAGS-$(CONFIG_TARGET_CPU_BOOL) += -mcpu=$(CONFIG_TARGET_CPU)
 170
 171 CFLAGS-y += $(CONFIG_TUNE_CPU)
 172
 173 asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
 174
 175 KBUILD_CPPFLAGS += -I $(srctree)/arch/powerpc $(asinstr)
 176 KBUILD_AFLAGS   += $(AFLAGS-y)
 177 KBUILD_CFLAGS   += $(CC_FLAGS_NO_FPU)
 178 KBUILD_CFLAGS   += $(CFLAGS-y)
 179
 180 CHECKFLAGS      += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__
 181 ifdef CONFIG_CPU_BIG_ENDIAN
 182 CHECKFLAGS      += -D__BIG_ENDIAN__
 183 else
 184 CHECKFLAGS      += -D__LITTLE_ENDIAN__
 185 endif
 186
 187 ifdef CONFIG_476FPE_ERR46
 188         KBUILD_LDFLAGS_MODULE += --ppc476-workaround \
 189                 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds
 190 endif
 191
 192 # No prefix or pcrel
 193 ifdef CONFIG_PPC_KERNEL_PREFIXED
 194 KBUILD_CFLAGS += $(call cc-option,-mprefixed)
 195 else
 196 KBUILD_CFLAGS += $(call cc-option,-mno-prefixed)
 197 endif
 198 ifdef CONFIG_PPC_KERNEL_PCREL
 199 KBUILD_CFLAGS += $(call cc-option,-mpcrel)
 200 else
 201 KBUILD_CFLAGS += $(call cc-option,-mno-pcrel)
 202 endif
 203
 204 # No AltiVec or VSX or MMA instructions when building kernel
 205 KBUILD_CFLAGS += $(call cc-option,-mno-altivec)
 206 KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
 207 KBUILD_CFLAGS += $(call cc-option,-mno-mma)
 208
 209 # No SPE instruction when building kernel
 210 # (We use all available options to help semi-broken compilers)
 211 KBUILD_CFLAGS += $(call cc-option,-mno-spe)
 212 KBUILD_CFLAGS += $(call cc-option,-mspe=no)
 213
 214 # Don't emit .eh_frame since we have no use for it
 215 KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
 216
 217 # Never use string load/store instructions as they are
 218 # often slow when they are implemented at all
 219 KBUILD_CFLAGS           += $(call cc-option,-mno-string)
 220
 221 KBUILD_AFLAGS += $(aflags-y)
 222 KBUILD_CFLAGS += $(cflags-y)
 223
 224 # Default to zImage, override when needed
 225 all: zImage
 226
 227 # With make 3.82 we cannot mix normal and wildcard targets
 228 BOOT_TARGETS1 := zImage zImage.initrd uImage
 229 BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.%
 230
 231 PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2)
 232
 233 boot := arch/powerpc/boot
 234
 235 $(BOOT_TARGETS1): vmlinux
 236         $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 237 $(BOOT_TARGETS2): vmlinux
 238         $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 239
 240
 241 PHONY += bootwrapper_install
 242 bootwrapper_install:
 243         $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@)
 244
 245 include $(srctree)/scripts/Makefile.defconf
 246
 247 generated_configs += ppc64le_defconfig
 248 ppc64le_defconfig:
 249         $(call merge_into_defconfig,ppc64_defconfig,le)
 250
 251 generated_configs += ppc64le_guest_defconfig
 252 ppc64le_guest_defconfig:
 253         $(call merge_into_defconfig,ppc64_defconfig,le guest kvm_guest)
 254
 255 generated_configs += ppc64_guest_defconfig
 256 ppc64_guest_defconfig:
 257         $(call merge_into_defconfig,ppc64_defconfig,be guest kvm_guest)
 258
 259 generated_configs += pseries_le_defconfig
 260 pseries_le_defconfig: ppc64le_guest_defconfig
 261
 262 generated_configs += pseries_defconfig
 263 pseries_defconfig: ppc64le_guest_defconfig
 264
 265 generated_configs += powernv_be_defconfig
 266 powernv_be_defconfig:
 267         $(call merge_into_defconfig,powernv_defconfig,be)
 268
 269 generated_configs += mpc85xx_defconfig
 270 mpc85xx_defconfig:
 271         $(call merge_into_defconfig,mpc85xx_base.config,\
 272                 85xx-32bit 85xx-hw fsl-emb-nonhw)
 273
 274 generated_configs += mpc85xx_smp_defconfig
 275 mpc85xx_smp_defconfig:
 276         $(call merge_into_defconfig,mpc85xx_base.config,\
 277                 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw)
 278
 279 generated_configs += corenet32_smp_defconfig
 280 corenet32_smp_defconfig:
 281         $(call merge_into_defconfig,corenet_base.config,\
 282                 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa)
 283
 284 generated_configs += corenet64_smp_defconfig
 285 corenet64_smp_defconfig:
 286         $(call merge_into_defconfig,corenet_base.config,\
 287                 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa)
 288
 289 generated_configs += mpc86xx_defconfig
 290 mpc86xx_defconfig:
 291         $(call merge_into_defconfig,mpc86xx_base.config,\
 292                 86xx-hw fsl-emb-nonhw)
 293
 294 generated_configs += mpc86xx_smp_defconfig
 295 mpc86xx_smp_defconfig:
 296         $(call merge_into_defconfig,mpc86xx_base.config,\
 297                 86xx-smp 86xx-hw fsl-emb-nonhw)
 298
 299 generated_configs += ppc32_allmodconfig
 300 ppc32_allmodconfig:
 301         $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \
 302                 -f $(srctree)/Makefile allmodconfig
 303
 304 generated_configs += ppc44x_allmodconfig
 305 ppc44x_allmodconfig:
 306         $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/44x.config \
 307                 -f $(srctree)/Makefile allmodconfig
 308
 309 generated_configs += ppc8xx_allmodconfig
 310 ppc8xx_allmodconfig:
 311         $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/8xx.config \
 312                 -f $(srctree)/Makefile allmodconfig
 313
 314 generated_configs += ppc85xx_allmodconfig
 315 ppc85xx_allmodconfig:
 316         $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-32bit.config \
 317                 -f $(srctree)/Makefile allmodconfig
 318
 319 generated_configs += ppc_defconfig
 320 ppc_defconfig:
 321         $(call merge_into_defconfig,book3s_32.config,)
 322
 323 generated_configs += ppc64le_allmodconfig
 324 ppc64le_allmodconfig:
 325         $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \
 326                 -f $(srctree)/Makefile allmodconfig
 327
 328 generated_configs += ppc64le_allnoconfig
 329 ppc64le_allnoconfig:
 330         $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/ppc64le.config \
 331                 -f $(srctree)/Makefile allnoconfig
 332
 333 generated_configs += ppc64_book3e_allmodconfig
 334 ppc64_book3e_allmodconfig:
 335         $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \
 336                 -f $(srctree)/Makefile allmodconfig
 337
 338 generated_configs += ppc32_randconfig
 339 ppc32_randconfig:
 340         $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/32-bit.config \
 341                 -f $(srctree)/Makefile randconfig
 342
 343 generated_configs += ppc64_randconfig
 344 ppc64_randconfig:
 345         $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/64-bit.config \
 346                 -f $(srctree)/Makefile randconfig
 347
 348 PHONY += $(generated_configs)
 349
 350 define archhelp
 351   echo '* zImage          - Build default images selected by kernel config'
 352   echo '  zImage.*        - Compressed kernel image (arch/powerpc/boot/zImage.*)'
 353   echo '  uImage          - U-Boot native image format'
 354   echo '  cuImage.<dt>    - Backwards compatible U-Boot image for older'
 355   echo '                    versions which do not support device trees'
 356   echo '  dtbImage.<dt>   - zImage with an embedded device tree blob'
 357   echo '  simpleImage.<dt> - Firmware independent image.'
 358   echo '  treeImage.<dt>  - Support for older IBM 4xx firmware (not U-Boot)'
 359   echo '  install         - Install kernel using'
 360   echo '                    (your) ~/bin/$(INSTALLKERNEL) or'
 361   echo '                    (distribution) /sbin/$(INSTALLKERNEL) or'
 362   echo '                    install to $$(INSTALL_PATH)'
 363   echo '  *_defconfig     - Select default config from arch/powerpc/configs'
 364   echo ''
 365   echo '  Targets with <dt> embed a device tree blob inside the image'
 366   echo '  These targets support board with firmware that does not'
 367   echo '  support passing a device tree directly.  Replace <dt> with the'
 368   echo '  name of a dts file from the arch/powerpc/boot/dts/ directory'
 369   echo '  (minus the .dts extension).'
 370   echo
 371   $(foreach cfg,$(generated_configs),
 372     printf "  %-27s - Build for %s\\n" $(cfg) $(subst _defconfig,,$(cfg));)
 373 endef
 374
 375 PHONY += install
 376 install:
 377         $(call cmd,install)
 378
 379 ifeq ($(KBUILD_EXTMOD),)
 380 # We need to generate vdso-offsets.h before compiling certain files in kernel/.
 381 # In order to do that, we should use the archprepare target, but we can't since
 382 # asm-offsets.h is included in some files used to generate vdso-offsets.h, and
 383 # asm-offsets.h is built in prepare0, for which archprepare is a dependency.
 384 # Therefore we need to generate the header after prepare0 has been made, hence
 385 # this hack.
 386 prepare: vdso_prepare
 387 vdso_prepare: prepare0
 388         $(if $(CONFIG_VDSO32),$(Q)$(MAKE) \
 389                 $(build)=arch/powerpc/kernel/vdso include/generated/vdso32-offsets.h)
 390         $(if $(CONFIG_PPC64),$(Q)$(MAKE) \
 391                 $(build)=arch/powerpc/kernel/vdso include/generated/vdso64-offsets.h)
 392 endif
 393
 394 archprepare: checkbin
 395
 396 archheaders:
 397         $(Q)$(MAKE) $(build)=arch/powerpc/kernel/syscalls all
 398
 399 ifdef CONFIG_STACKPROTECTOR
 400 prepare: stack_protector_prepare
 401
 402 PHONY += stack_protector_prepare
 403 stack_protector_prepare: prepare0
 404 ifdef CONFIG_PPC64
 405         $(eval KBUILD_CFLAGS += -mstack-protector-guard=tls -mstack-protector-guard-reg=r13 \
 406                                 -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' include/generated/asm-offsets.h))
 407 else
 408         $(eval KBUILD_CFLAGS += -mstack-protector-guard=tls -mstack-protector-guard-reg=r2 \
 409                                 -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' include/generated/asm-offsets.h))
 410 endif
 411 endif
 412
 413 PHONY += checkbin
 414 checkbin:
 415         @if test "x${CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT}" = "xy" -a \
 416                 "x${CONFIG_LD_IS_BFD}" = "xy" -a \
 417                 "${CONFIG_LD_VERSION}" = "23700" ; then \
 418                 echo -n '*** binutils 2.37 drops unused section symbols, which recordmcount ' ; \
 419                 echo 'is unable to handle.' ; \
 420                 echo '*** Please use a different binutils version.' ; \
 421                 false ; \
 422         fi