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 15HAS_BIARCH := $(call cc-option-yn, -m32) 16 17# Set default 32 bits cross compilers for vdso and boot wrapper 18CROSS32_COMPILE ?= 19 20CROSS32CC := $(CROSS32_COMPILE)gcc 21CROSS32AR := $(CROSS32_COMPILE)ar 22 23ifeq ($(HAS_BIARCH),y) 24ifeq ($(CROSS32_COMPILE),) 25CROSS32CC := $(CC) -m32 26KBUILD_ARFLAGS += --target=elf32-powerpc 27endif 28endif 29 30export CROSS32CC CROSS32AR 31 32ifeq ($(CROSS_COMPILE),) 33KBUILD_DEFCONFIG := $(shell uname -m)_defconfig 34else 35KBUILD_DEFCONFIG := ppc64_defconfig 36endif 37 38ifeq ($(CONFIG_PPC64),y) 39new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi) 40 41ifeq ($(new_nm),y) 42NM := $(NM) --synthetic 43endif 44endif 45 46# BITS is used as extension for files which are available in a 32 bit 47# and a 64 bit version to simplify shared Makefiles. 48# e.g.: obj-y += foo_$(BITS).o 49export BITS 50 51ifdef CONFIG_PPC64 52 BITS := 64 53else 54 BITS := 32 55endif 56 57machine-y = ppc 58machine-$(CONFIG_PPC64) += 64 59machine-$(CONFIG_CPU_LITTLE_ENDIAN) += le 60UTS_MACHINE := $(subst $(space),,$(machine-y)) 61 62ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y) 63override LD += -EL 64LDEMULATION := lppc 65GNUTARGET := powerpcle 66MULTIPLEWORD := -mno-multiple 67KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect) 68else 69override LD += -EB 70LDEMULATION := ppc 71GNUTARGET := powerpc 72MULTIPLEWORD := -mmultiple 73endif 74 75ifdef CONFIG_PPC64 76cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1) 77cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mcall-aixdesc) 78aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1) 79aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mabi=elfv2 80endif 81 82cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian 83cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) 84ifneq ($(cc-name),clang) 85 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align 86endif 87 88aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) 89aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian 90 91ifeq ($(HAS_BIARCH),y) 92override AS += -a$(BITS) 93override LD += -m elf$(BITS)$(LDEMULATION) 94override CC += -m$(BITS) 95KBUILD_ARFLAGS += --target=elf$(BITS)-$(GNUTARGET) 96endif 97 98LDFLAGS_vmlinux-y := -Bstatic 99LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie 100LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y) 101LDFLAGS_vmlinux += $(call ld-option,--orphan-handling=warn) 102 103ifeq ($(CONFIG_PPC64),y) 104ifeq ($(call cc-option-yn,-mcmodel=medium),y) 105 # -mcmodel=medium breaks modules because it uses 32bit offsets from 106 # the TOC pointer to create pointers where possible. Pointers into the 107 # percpu data area are created by this method. 108 # 109 # The kernel module loader relocates the percpu data section from the 110 # original location (starting with 0xd...) to somewhere in the base 111 # kernel percpu data space (starting with 0xc...). We need a full 112 # 64bit relocation for this to work, hence -mcmodel=large. 113 KBUILD_CFLAGS_MODULE += -mcmodel=large 114else 115 export NO_MINIMAL_TOC := -mno-minimal-toc 116endif 117endif 118 119CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no) 120ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y) 121CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc)) 122AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2) 123else 124CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1) 125CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc) 126AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1) 127endif 128CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc)) 129CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions) 130CFLAGS-$(CONFIG_PPC32) := -ffixed-r2 $(MULTIPLEWORD) 131 132ifeq ($(CONFIG_PPC_BOOK3S_64),y) 133CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,-mtune=power4) 134CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power4 135else 136CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64 137endif 138 139ifdef CONFIG_MPROFILE_KERNEL 140 ifeq ($(shell $(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -I$(srctree)/include -D__KERNEL__),OK) 141 CC_FLAGS_FTRACE := -pg -mprofile-kernel 142 KBUILD_CPPFLAGS += -DCC_USING_MPROFILE_KERNEL 143 else 144 # If the user asked for mprofile-kernel but the toolchain doesn't 145 # support it, emit a warning and deliberately break the build later 146 # with mprofile-kernel-not-supported. We would prefer to make this an 147 # error right here, but then the user would never be able to run 148 # oldconfig to change their configuration. 149 $(warning Compiler does not support mprofile-kernel, set CONFIG_DISABLE_MPROFILE_KERNEL) 150 CC_FLAGS_FTRACE := -mprofile-kernel-not-supported 151 endif 152endif 153 154CFLAGS-$(CONFIG_CELL_CPU) += $(call cc-option,-mcpu=cell) 155CFLAGS-$(CONFIG_POWER4_CPU) += $(call cc-option,-mcpu=power4) 156CFLAGS-$(CONFIG_POWER5_CPU) += $(call cc-option,-mcpu=power5) 157CFLAGS-$(CONFIG_POWER6_CPU) += $(call cc-option,-mcpu=power6) 158CFLAGS-$(CONFIG_POWER7_CPU) += $(call cc-option,-mcpu=power7) 159CFLAGS-$(CONFIG_POWER8_CPU) += $(call cc-option,-mcpu=power8) 160 161# Altivec option not allowed with e500mc64 in GCC. 162ifeq ($(CONFIG_ALTIVEC),y) 163E5500_CPU := -mcpu=powerpc64 164else 165E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64) 166endif 167CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU) 168CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU)) 169 170ifeq ($(CONFIG_PPC32),y) 171ifeq ($(CONFIG_PPC_E500MC),y) 172CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc) 173else 174CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc) 175endif 176endif 177 178asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1) 179 180KBUILD_CPPFLAGS += -Iarch/$(ARCH) $(asinstr) 181KBUILD_AFLAGS += -Iarch/$(ARCH) $(AFLAGS-y) 182KBUILD_CFLAGS += $(call cc-option,-msoft-float) 183KBUILD_CFLAGS += -pipe -Iarch/$(ARCH) $(CFLAGS-y) 184CPP = $(CC) -E $(KBUILD_CFLAGS) 185 186CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__ 187ifdef CONFIG_CPU_BIG_ENDIAN 188CHECKFLAGS += -D__BIG_ENDIAN__ 189else 190CHECKFLAGS += -D__LITTLE_ENDIAN__ 191endif 192 193ifdef CONFIG_PPC32 194KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o 195else 196ifeq ($(call ld-ifversion, -ge, 225000000, y),y) 197# Have the linker provide sfpr if possible. 198# There is a corresponding test in arch/powerpc/lib/Makefile 199KBUILD_LDFLAGS_MODULE += --save-restore-funcs 200else 201KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o 202endif 203endif 204 205ifeq ($(CONFIG_476FPE_ERR46),y) 206 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \ 207 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds 208endif 209 210# No AltiVec or VSX instructions when building kernel 211KBUILD_CFLAGS += $(call cc-option,-mno-altivec) 212KBUILD_CFLAGS += $(call cc-option,-mno-vsx) 213 214# No SPE instruction when building kernel 215# (We use all available options to help semi-broken compilers) 216KBUILD_CFLAGS += $(call cc-option,-mno-spe) 217KBUILD_CFLAGS += $(call cc-option,-mspe=no) 218 219# Enable unit-at-a-time mode when possible. It shrinks the 220# kernel considerably. 221KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time) 222 223# FIXME: the module load should be taught about the additional relocs 224# generated by this. 225# revert to pre-gcc-4.4 behaviour of .eh_frame 226KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm) 227 228# Never use string load/store instructions as they are 229# often slow when they are implemented at all 230KBUILD_CFLAGS += $(call cc-option,-mno-string) 231 232ifeq ($(CONFIG_6xx),y) 233KBUILD_CFLAGS += -mcpu=powerpc 234endif 235 236# Work around a gcc code-gen bug with -fno-omit-frame-pointer. 237ifeq ($(CONFIG_FUNCTION_TRACER),y) 238KBUILD_CFLAGS += -mno-sched-epilog 239endif 240 241cpu-as-$(CONFIG_4xx) += -Wa,-m405 242cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec) 243cpu-as-$(CONFIG_E200) += -Wa,-me200 244 245KBUILD_AFLAGS += $(cpu-as-y) 246KBUILD_CFLAGS += $(cpu-as-y) 247 248KBUILD_AFLAGS += $(aflags-y) 249KBUILD_CFLAGS += $(cflags-y) 250 251head-y := arch/powerpc/kernel/head_$(BITS).o 252head-$(CONFIG_8xx) := arch/powerpc/kernel/head_8xx.o 253head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o 254head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o 255head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o 256 257head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o 258head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o 259head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o 260head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o 261 262core-y += arch/powerpc/kernel/ \ 263 arch/powerpc/mm/ \ 264 arch/powerpc/lib/ \ 265 arch/powerpc/sysdev/ \ 266 arch/powerpc/platforms/ \ 267 arch/powerpc/math-emu/ \ 268 arch/powerpc/crypto/ \ 269 arch/powerpc/net/ 270core-$(CONFIG_XMON) += arch/powerpc/xmon/ 271core-$(CONFIG_KVM) += arch/powerpc/kvm/ 272core-$(CONFIG_PERF_EVENTS) += arch/powerpc/perf/ 273core-$(CONFIG_KEXEC_FILE) += arch/powerpc/purgatory/ 274 275drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/ 276 277# Default to zImage, override when needed 278all: zImage 279 280# With make 3.82 we cannot mix normal and wildcard targets 281BOOT_TARGETS1 := zImage zImage.initrd uImage 282BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.% 283 284PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2) 285 286boot := arch/$(ARCH)/boot 287 288$(BOOT_TARGETS1): vmlinux 289 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 290$(BOOT_TARGETS2): vmlinux 291 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 292 293 294bootwrapper_install: 295 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 296 297%.dtb: scripts 298 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 299 300# Used to create 'merged defconfigs' 301# To use it $(call) it with the first argument as the base defconfig 302# and the second argument as a space separated list of .config files to merge, 303# without the .config suffix. 304define merge_into_defconfig 305 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ 306 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \ 307 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config) 308 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 309endef 310 311PHONY += pseries_le_defconfig 312pseries_le_defconfig: 313 $(call merge_into_defconfig,pseries_defconfig,le) 314 315PHONY += ppc64le_defconfig 316ppc64le_defconfig: 317 $(call merge_into_defconfig,ppc64_defconfig,le) 318 319PHONY += mpc85xx_defconfig 320mpc85xx_defconfig: 321 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\ 322 85xx-32bit 85xx-hw fsl-emb-nonhw) 323 324PHONY += mpc85xx_smp_defconfig 325mpc85xx_smp_defconfig: 326 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\ 327 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw) 328 329PHONY += corenet32_smp_defconfig 330corenet32_smp_defconfig: 331 $(call merge_into_defconfig,corenet_basic_defconfig,\ 332 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa) 333 334PHONY += corenet64_smp_defconfig 335corenet64_smp_defconfig: 336 $(call merge_into_defconfig,corenet_basic_defconfig,\ 337 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa) 338 339PHONY += mpc86xx_defconfig 340mpc86xx_defconfig: 341 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\ 342 86xx-hw fsl-emb-nonhw) 343 344PHONY += mpc86xx_smp_defconfig 345mpc86xx_smp_defconfig: 346 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\ 347 86xx-smp 86xx-hw fsl-emb-nonhw) 348 349define archhelp 350 @echo '* zImage - Build default images selected by kernel config' 351 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)' 352 @echo ' uImage - U-Boot native image format' 353 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older' 354 @echo ' versions which do not support device trees' 355 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob' 356 @echo ' simpleImage.<dt> - Firmware independent image.' 357 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)' 358 @echo ' install - Install kernel using' 359 @echo ' (your) ~/bin/$(INSTALLKERNEL) or' 360 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 361 @echo ' install to $$(INSTALL_PATH) and run lilo' 362 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs' 363 @echo '' 364 @echo ' Targets with <dt> embed a device tree blob inside the image' 365 @echo ' These targets support board with firmware that does not' 366 @echo ' support passing a device tree directly. Replace <dt> with the' 367 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory' 368 @echo ' (minus the .dts extension).' 369endef 370 371install: 372 $(Q)$(MAKE) $(build)=$(boot) install 373 374vdso_install: 375ifeq ($(CONFIG_PPC64),y) 376 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@ 377endif 378 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@ 379 380archclean: 381 $(Q)$(MAKE) $(clean)=$(boot) 382 383archprepare: checkbin 384 385# Use the file '.tmp_gas_check' for binutils tests, as gas won't output 386# to stdout and these checks are run even on install targets. 387TOUT := .tmp_gas_check 388 389# Check gcc and binutils versions: 390# - gcc-3.4 and binutils-2.14 are a fatal combination 391# - Require gcc 4.0 or above on 64-bit 392# - gcc-4.2.0 has issues compiling modules on 64-bit 393checkbin: 394 @if test "$(cc-name)" != "clang" \ 395 && test "$(cc-version)" = "0304" ; then \ 396 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \ 397 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \ 398 echo 'correctly with gcc-3.4 and your version of binutils.'; \ 399 echo '*** Please upgrade your binutils or downgrade your gcc'; \ 400 false; \ 401 fi ; \ 402 fi 403 @if test "$(cc-name)" != "clang" \ 404 && test "$(cc-version)" -lt "0400" \ 405 && test "x${CONFIG_PPC64}" = "xy" ; then \ 406 echo -n "Sorry, GCC v4.0 or above is required to build " ; \ 407 echo "the 64-bit powerpc kernel." ; \ 408 false ; \ 409 fi 410 @if test "$(cc-name)" != "clang" \ 411 && test "$(cc-fullversion)" = "040200" \ 412 && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \ 413 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \ 414 echo 'kernel with modules enabled.' ; \ 415 echo -n '*** Please use a different GCC version or ' ; \ 416 echo 'disable kernel modules' ; \ 417 false ; \ 418 fi 419 @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \ 420 && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \ 421 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \ 422 echo 'in some circumstances.' ; \ 423 echo -n '*** Please use a different binutils version.' ; \ 424 false ; \ 425 fi 426 427 428CLEAN_FILES += $(TOUT) 429 430