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 13HAS_BIARCH := $(call cc-option-yn, -m32) 14 15# Set default 32 bits cross compilers for vdso and boot wrapper 16CROSS32_COMPILE ?= 17 18ifeq ($(HAS_BIARCH),y) 19ifeq ($(CROSS32_COMPILE),) 20ifdef CONFIG_PPC32 21# These options will be overridden by any -mcpu option that the CPU 22# or platform code sets later on the command line, but they are needed 23# to set a sane 32-bit cpu target for the 64-bit cross compiler which 24# may default to the wrong ISA. 25KBUILD_CFLAGS += -mcpu=powerpc 26KBUILD_AFLAGS += -mcpu=powerpc 27endif 28endif 29endif 30 31ifdef CONFIG_PPC_BOOK3S_32 32KBUILD_CFLAGS += -mcpu=powerpc 33endif 34 35# If we're on a ppc/ppc64/ppc64le machine use that defconfig, otherwise just use 36# ppc64_defconfig because we have nothing better to go on. 37uname := $(shell uname -m) 38KBUILD_DEFCONFIG := $(if $(filter ppc%,$(uname)),$(uname),ppc64)_defconfig 39 40new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi) 41 42ifeq ($(new_nm),y) 43NM := $(NM) --synthetic 44endif 45 46# BITS is used as extension for files which are available in a 32 bit 47# and a 64 bit version to simplify shared Makefiles. 48# e.g.: obj-y += foo_$(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 62# XXX This needs to be before we override LD below 63ifdef CONFIG_PPC32 64KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o 65else 66ifeq ($(call ld-ifversion, -ge, 22500, y),y) 67# Have the linker provide sfpr if possible. 68# There is a corresponding test in arch/powerpc/lib/Makefile 69KBUILD_LDFLAGS_MODULE += --save-restore-funcs 70else 71KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o 72endif 73endif 74 75ifdef CONFIG_CPU_LITTLE_ENDIAN 76KBUILD_CFLAGS += -mlittle-endian 77KBUILD_LDFLAGS += -EL 78LDEMULATION := lppc 79GNUTARGET := powerpcle 80MULTIPLEWORD := -mno-multiple 81KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect) 82else 83KBUILD_CFLAGS += $(call cc-option,-mbig-endian) 84KBUILD_LDFLAGS += -EB 85LDEMULATION := ppc 86GNUTARGET := powerpc 87MULTIPLEWORD := -mmultiple 88endif 89 90ifdef CONFIG_PPC64 91ifndef CONFIG_CC_IS_CLANG 92cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1) 93cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mcall-aixdesc) 94aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1) 95aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mabi=elfv2 96endif 97endif 98 99ifndef CONFIG_CC_IS_CLANG 100 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align 101endif 102 103cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) 104cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian 105aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) 106aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian 107 108ifeq ($(HAS_BIARCH),y) 109KBUILD_CFLAGS += -m$(BITS) 110KBUILD_AFLAGS += -m$(BITS) -Wl,-a$(BITS) 111KBUILD_LDFLAGS += -m elf$(BITS)$(LDEMULATION) 112endif 113 114cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard=tls 115ifdef CONFIG_PPC64 116cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r13 117else 118cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r2 119endif 120 121LDFLAGS_vmlinux-y := -Bstatic 122LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie 123LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) += -z notext 124LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y) 125 126ifdef CONFIG_PPC64 127ifeq ($(call cc-option-yn,-mcmodel=medium),y) 128 # -mcmodel=medium breaks modules because it uses 32bit offsets from 129 # the TOC pointer to create pointers where possible. Pointers into the 130 # percpu data area are created by this method. 131 # 132 # The kernel module loader relocates the percpu data section from the 133 # original location (starting with 0xd...) to somewhere in the base 134 # kernel percpu data space (starting with 0xc...). We need a full 135 # 64bit relocation for this to work, hence -mcmodel=large. 136 KBUILD_CFLAGS_MODULE += -mcmodel=large 137else 138 export NO_MINIMAL_TOC := -mno-minimal-toc 139endif 140endif 141 142CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no) 143ifndef CONFIG_CC_IS_CLANG 144ifdef CONFIG_CPU_LITTLE_ENDIAN 145CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc)) 146AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2) 147else 148CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1) 149CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc) 150AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1) 151endif 152endif 153CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc)) 154CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions) 155 156# Clang unconditionally reserves r2 on ppc32 and does not support the flag 157# https://bugs.llvm.org/show_bug.cgi?id=39555 158CFLAGS-$(CONFIG_PPC32) := $(call cc-option, -ffixed-r2) 159 160# Clang doesn't support -mmultiple / -mno-multiple 161# https://bugs.llvm.org/show_bug.cgi?id=39556 162CFLAGS-$(CONFIG_PPC32) += $(call cc-option, $(MULTIPLEWORD)) 163 164CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata) 165 166ifdef CONFIG_PPC_BOOK3S_64 167ifdef CONFIG_CPU_LITTLE_ENDIAN 168CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8 169CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power9,-mtune=power8) 170else 171CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5)) 172CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mcpu=power5,-mcpu=power4) 173endif 174else 175CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64 176endif 177 178ifdef CONFIG_FUNCTION_TRACER 179CC_FLAGS_FTRACE := -pg 180ifdef CONFIG_MPROFILE_KERNEL 181CC_FLAGS_FTRACE += -mprofile-kernel 182endif 183endif 184 185CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU)) 186 187# Altivec option not allowed with e500mc64 in GCC. 188ifdef CONFIG_ALTIVEC 189E5500_CPU := -mcpu=powerpc64 190else 191E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64) 192endif 193CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU) 194CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU)) 195 196ifdef CONFIG_PPC32 197ifdef CONFIG_PPC_E500MC 198CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc) 199else 200CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc) 201endif 202endif 203 204asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1) 205 206KBUILD_CPPFLAGS += -I $(srctree)/arch/$(ARCH) $(asinstr) 207KBUILD_AFLAGS += $(AFLAGS-y) 208KBUILD_CFLAGS += $(call cc-option,-msoft-float) 209KBUILD_CFLAGS += -pipe $(CFLAGS-y) 210CPP = $(CC) -E $(KBUILD_CFLAGS) 211 212CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__ 213ifdef CONFIG_CPU_BIG_ENDIAN 214CHECKFLAGS += -D__BIG_ENDIAN__ 215else 216CHECKFLAGS += -D__LITTLE_ENDIAN__ 217endif 218 219ifdef CONFIG_476FPE_ERR46 220 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \ 221 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds 222endif 223 224# No AltiVec or VSX instructions when building kernel 225KBUILD_CFLAGS += $(call cc-option,-mno-altivec) 226KBUILD_CFLAGS += $(call cc-option,-mno-vsx) 227 228# No SPE instruction when building kernel 229# (We use all available options to help semi-broken compilers) 230KBUILD_CFLAGS += $(call cc-option,-mno-spe) 231KBUILD_CFLAGS += $(call cc-option,-mspe=no) 232 233# Don't emit .eh_frame since we have no use for it 234KBUILD_CFLAGS += -fno-asynchronous-unwind-tables 235 236# Never use string load/store instructions as they are 237# often slow when they are implemented at all 238KBUILD_CFLAGS += $(call cc-option,-mno-string) 239 240cpu-as-$(CONFIG_40x) += -Wa,-m405 241cpu-as-$(CONFIG_44x) += -Wa,-m440 242cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec) 243cpu-as-$(CONFIG_E500) += -Wa,-me500 244 245# When using '-many -mpower4' gas will first try and find a matching power4 246# mnemonic and failing that it will allow any valid mnemonic that GAS knows 247# about. GCC will pass -many to GAS when assembling, clang does not. 248cpu-as-$(CONFIG_PPC_BOOK3S_64) += -Wa,-mpower4 -Wa,-many 249cpu-as-$(CONFIG_PPC_E500MC) += $(call as-option,-Wa$(comma)-me500mc) 250 251KBUILD_AFLAGS += $(cpu-as-y) 252KBUILD_CFLAGS += $(cpu-as-y) 253 254KBUILD_AFLAGS += $(aflags-y) 255KBUILD_CFLAGS += $(cflags-y) 256 257head-$(CONFIG_PPC64) := arch/powerpc/kernel/head_64.o 258head-$(CONFIG_PPC_BOOK3S_32) := arch/powerpc/kernel/head_book3s_32.o 259head-$(CONFIG_PPC_8xx) := arch/powerpc/kernel/head_8xx.o 260head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o 261head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o 262head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o 263 264head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o 265head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o 266head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o 267head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o 268 269# Default to zImage, override when needed 270all: zImage 271 272# With make 3.82 we cannot mix normal and wildcard targets 273BOOT_TARGETS1 := zImage zImage.initrd uImage 274BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.% 275 276PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2) 277 278boot := arch/$(ARCH)/boot 279 280$(BOOT_TARGETS1): vmlinux 281 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 282$(BOOT_TARGETS2): vmlinux 283 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 284 285 286PHONY += bootwrapper_install 287bootwrapper_install: 288 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 289 290# Used to create 'merged defconfigs' 291# To use it $(call) it with the first argument as the base defconfig 292# and the second argument as a space separated list of .config files to merge, 293# without the .config suffix. 294define merge_into_defconfig 295 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ 296 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \ 297 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config) 298 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 299endef 300 301PHONY += pseries_le_defconfig 302pseries_le_defconfig: 303 $(call merge_into_defconfig,pseries_defconfig,le) 304 305PHONY += ppc64le_defconfig 306ppc64le_defconfig: 307 $(call merge_into_defconfig,ppc64_defconfig,le) 308 309PHONY += ppc64le_guest_defconfig 310ppc64le_guest_defconfig: 311 $(call merge_into_defconfig,ppc64_defconfig,le guest) 312 313PHONY += ppc64_guest_defconfig 314ppc64_guest_defconfig: 315 $(call merge_into_defconfig,ppc64_defconfig,be guest) 316 317PHONY += powernv_be_defconfig 318powernv_be_defconfig: 319 $(call merge_into_defconfig,powernv_defconfig,be) 320 321PHONY += mpc85xx_defconfig 322mpc85xx_defconfig: 323 $(call merge_into_defconfig,mpc85xx_base.config,\ 324 85xx-32bit 85xx-hw fsl-emb-nonhw) 325 326PHONY += mpc85xx_smp_defconfig 327mpc85xx_smp_defconfig: 328 $(call merge_into_defconfig,mpc85xx_base.config,\ 329 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw) 330 331PHONY += corenet32_smp_defconfig 332corenet32_smp_defconfig: 333 $(call merge_into_defconfig,corenet_base.config,\ 334 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa) 335 336PHONY += corenet64_smp_defconfig 337corenet64_smp_defconfig: 338 $(call merge_into_defconfig,corenet_base.config,\ 339 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa) 340 341PHONY += mpc86xx_defconfig 342mpc86xx_defconfig: 343 $(call merge_into_defconfig,mpc86xx_base.config,\ 344 86xx-hw fsl-emb-nonhw) 345 346PHONY += mpc86xx_smp_defconfig 347mpc86xx_smp_defconfig: 348 $(call merge_into_defconfig,mpc86xx_base.config,\ 349 86xx-smp 86xx-hw fsl-emb-nonhw) 350 351PHONY += ppc32_allmodconfig 352ppc32_allmodconfig: 353 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \ 354 -f $(srctree)/Makefile allmodconfig 355 356PHONY += ppc_defconfig 357ppc_defconfig: 358 $(call merge_into_defconfig,book3s_32.config,) 359 360PHONY += ppc64le_allmodconfig 361ppc64le_allmodconfig: 362 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \ 363 -f $(srctree)/Makefile allmodconfig 364 365PHONY += ppc64le_allnoconfig 366ppc64le_allnoconfig: 367 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/ppc64le.config \ 368 -f $(srctree)/Makefile allnoconfig 369 370PHONY += ppc64_book3e_allmodconfig 371ppc64_book3e_allmodconfig: 372 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \ 373 -f $(srctree)/Makefile allmodconfig 374 375PHONY += ppc32_randconfig 376ppc32_randconfig: 377 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/32-bit.config \ 378 -f $(srctree)/Makefile randconfig 379 380PHONY += ppc64_randconfig 381ppc64_randconfig: 382 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/64-bit.config \ 383 -f $(srctree)/Makefile randconfig 384 385define archhelp 386 @echo '* zImage - Build default images selected by kernel config' 387 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)' 388 @echo ' uImage - U-Boot native image format' 389 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older' 390 @echo ' versions which do not support device trees' 391 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob' 392 @echo ' simpleImage.<dt> - Firmware independent image.' 393 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)' 394 @echo ' install - Install kernel using' 395 @echo ' (your) ~/bin/$(INSTALLKERNEL) or' 396 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 397 @echo ' install to $$(INSTALL_PATH) and run lilo' 398 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs' 399 @echo '' 400 @echo ' Targets with <dt> embed a device tree blob inside the image' 401 @echo ' These targets support board with firmware that does not' 402 @echo ' support passing a device tree directly. Replace <dt> with the' 403 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory' 404 @echo ' (minus the .dts extension).' 405endef 406 407PHONY += install 408install: 409 sh -x $(srctree)/$(boot)/install.sh "$(KERNELRELEASE)" vmlinux \ 410 System.map "$(INSTALL_PATH)" 411 412ifeq ($(KBUILD_EXTMOD),) 413# We need to generate vdso-offsets.h before compiling certain files in kernel/. 414# In order to do that, we should use the archprepare target, but we can't since 415# asm-offsets.h is included in some files used to generate vdso-offsets.h, and 416# asm-offsets.h is built in prepare0, for which archprepare is a dependency. 417# Therefore we need to generate the header after prepare0 has been made, hence 418# this hack. 419prepare: vdso_prepare 420vdso_prepare: prepare0 421 $(if $(CONFIG_VDSO32),$(Q)$(MAKE) \ 422 $(build)=arch/powerpc/kernel/vdso32 include/generated/vdso32-offsets.h) 423 $(if $(CONFIG_PPC64),$(Q)$(MAKE) \ 424 $(build)=arch/powerpc/kernel/vdso64 include/generated/vdso64-offsets.h) 425endif 426 427archprepare: checkbin 428 429archheaders: 430 $(Q)$(MAKE) $(build)=arch/powerpc/kernel/syscalls all 431 432ifdef CONFIG_STACKPROTECTOR 433prepare: stack_protector_prepare 434 435PHONY += stack_protector_prepare 436stack_protector_prepare: prepare0 437ifdef CONFIG_PPC64 438 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' include/generated/asm-offsets.h)) 439else 440 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' include/generated/asm-offsets.h)) 441endif 442endif 443 444PHONY += checkbin 445# Check toolchain versions: 446# - gcc-4.6 is the minimum kernel-wide version so nothing required. 447checkbin: 448 @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \ 449 && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \ 450 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \ 451 echo 'in some circumstances.' ; \ 452 echo -n '*** Please use a different binutils version.' ; \ 453 false ; \ 454 fi 455