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_PPC64_ELF_ABI_V1) += $(call cc-option,-mabi=elfv1) 93cflags-$(CONFIG_PPC64_ELF_ABI_V1) += $(call cc-option,-mcall-aixdesc) 94aflags-$(CONFIG_PPC64_ELF_ABI_V1) += $(call cc-option,-mabi=elfv1) 95aflags-$(CONFIG_PPC64_ELF_ABI_V2) += -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) := $(call cc-option,-mtraceback=no) 143ifndef CONFIG_CC_IS_CLANG 144ifdef CONFIG_PPC64_ELF_ABI_V2 145CFLAGS-$(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) += $(call cc-option,-mcpu=power5,-mcpu=power4) 173endif 174else ifdef CONFIG_PPC_BOOK3E_64 175CFLAGS-$(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-$(CONFIG_E500) += -Wa,-me500 244 245# When using '-many -mpower4' gas will first try and find a matching power4 246# mnemonic and failing that it will allow any valid mnemonic that GAS knows 247# about. GCC will pass -many to GAS when assembling, clang does not. 248# LLVM IAS doesn't understand either flag: https://github.com/ClangBuiltLinux/linux/issues/675 249# but LLVM IAS only supports ISA >= 2.06 for Book3S 64 anyway... 250cpu-as-$(CONFIG_PPC_BOOK3S_64) += $(call as-option,-Wa$(comma)-mpower4) $(call as-option,-Wa$(comma)-many) 251cpu-as-$(CONFIG_PPC_E500MC) += $(call as-option,-Wa$(comma)-me500mc) 252 253KBUILD_AFLAGS += $(cpu-as-y) 254KBUILD_CFLAGS += $(cpu-as-y) 255 256KBUILD_AFLAGS += $(aflags-y) 257KBUILD_CFLAGS += $(cflags-y) 258 259head-$(CONFIG_PPC64) := arch/powerpc/kernel/head_64.o 260head-$(CONFIG_PPC_BOOK3S_32) := arch/powerpc/kernel/head_book3s_32.o 261head-$(CONFIG_PPC_8xx) := arch/powerpc/kernel/head_8xx.o 262head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o 263head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o 264head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o 265 266head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o 267head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o 268head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o 269head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o 270 271# Default to zImage, override when needed 272all: zImage 273 274# With make 3.82 we cannot mix normal and wildcard targets 275BOOT_TARGETS1 := zImage zImage.initrd uImage 276BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.% 277 278PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2) 279 280boot := arch/$(ARCH)/boot 281 282$(BOOT_TARGETS1): vmlinux 283 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 284$(BOOT_TARGETS2): vmlinux 285 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 286 287 288PHONY += bootwrapper_install 289bootwrapper_install: 290 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 291 292# Used to create 'merged defconfigs' 293# To use it $(call) it with the first argument as the base defconfig 294# and the second argument as a space separated list of .config files to merge, 295# without the .config suffix. 296define merge_into_defconfig 297 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ 298 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \ 299 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config) 300 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 301endef 302 303PHONY += pseries_le_defconfig 304pseries_le_defconfig: 305 $(call merge_into_defconfig,pseries_defconfig,le) 306 307PHONY += ppc64le_defconfig 308ppc64le_defconfig: 309 $(call merge_into_defconfig,ppc64_defconfig,le) 310 311PHONY += ppc64le_guest_defconfig 312ppc64le_guest_defconfig: 313 $(call merge_into_defconfig,ppc64_defconfig,le guest) 314 315PHONY += ppc64_guest_defconfig 316ppc64_guest_defconfig: 317 $(call merge_into_defconfig,ppc64_defconfig,be guest) 318 319PHONY += powernv_be_defconfig 320powernv_be_defconfig: 321 $(call merge_into_defconfig,powernv_defconfig,be) 322 323PHONY += mpc85xx_defconfig 324mpc85xx_defconfig: 325 $(call merge_into_defconfig,mpc85xx_base.config,\ 326 85xx-32bit 85xx-hw fsl-emb-nonhw) 327 328PHONY += mpc85xx_smp_defconfig 329mpc85xx_smp_defconfig: 330 $(call merge_into_defconfig,mpc85xx_base.config,\ 331 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw) 332 333PHONY += corenet32_smp_defconfig 334corenet32_smp_defconfig: 335 $(call merge_into_defconfig,corenet_base.config,\ 336 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa) 337 338PHONY += corenet64_smp_defconfig 339corenet64_smp_defconfig: 340 $(call merge_into_defconfig,corenet_base.config,\ 341 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa) 342 343PHONY += mpc86xx_defconfig 344mpc86xx_defconfig: 345 $(call merge_into_defconfig,mpc86xx_base.config,\ 346 86xx-hw fsl-emb-nonhw) 347 348PHONY += mpc86xx_smp_defconfig 349mpc86xx_smp_defconfig: 350 $(call merge_into_defconfig,mpc86xx_base.config,\ 351 86xx-smp 86xx-hw fsl-emb-nonhw) 352 353PHONY += ppc32_allmodconfig 354ppc32_allmodconfig: 355 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \ 356 -f $(srctree)/Makefile allmodconfig 357 358PHONY += ppc_defconfig 359ppc_defconfig: 360 $(call merge_into_defconfig,book3s_32.config,) 361 362PHONY += ppc64le_allmodconfig 363ppc64le_allmodconfig: 364 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \ 365 -f $(srctree)/Makefile allmodconfig 366 367PHONY += ppc64le_allnoconfig 368ppc64le_allnoconfig: 369 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/ppc64le.config \ 370 -f $(srctree)/Makefile allnoconfig 371 372PHONY += ppc64_book3e_allmodconfig 373ppc64_book3e_allmodconfig: 374 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \ 375 -f $(srctree)/Makefile allmodconfig 376 377PHONY += ppc32_randconfig 378ppc32_randconfig: 379 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/32-bit.config \ 380 -f $(srctree)/Makefile randconfig 381 382PHONY += ppc64_randconfig 383ppc64_randconfig: 384 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/64-bit.config \ 385 -f $(srctree)/Makefile randconfig 386 387define archhelp 388 @echo '* zImage - Build default images selected by kernel config' 389 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)' 390 @echo ' uImage - U-Boot native image format' 391 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older' 392 @echo ' versions which do not support device trees' 393 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob' 394 @echo ' simpleImage.<dt> - Firmware independent image.' 395 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)' 396 @echo ' install - Install kernel using' 397 @echo ' (your) ~/bin/$(INSTALLKERNEL) or' 398 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 399 @echo ' install to $$(INSTALL_PATH) and run lilo' 400 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs' 401 @echo '' 402 @echo ' Targets with <dt> embed a device tree blob inside the image' 403 @echo ' These targets support board with firmware that does not' 404 @echo ' support passing a device tree directly. Replace <dt> with the' 405 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory' 406 @echo ' (minus the .dts extension).' 407endef 408 409PHONY += install 410install: 411 $(call cmd,install) 412 413ifeq ($(KBUILD_EXTMOD),) 414# We need to generate vdso-offsets.h before compiling certain files in kernel/. 415# In order to do that, we should use the archprepare target, but we can't since 416# asm-offsets.h is included in some files used to generate vdso-offsets.h, and 417# asm-offsets.h is built in prepare0, for which archprepare is a dependency. 418# Therefore we need to generate the header after prepare0 has been made, hence 419# this hack. 420prepare: vdso_prepare 421vdso_prepare: prepare0 422 $(if $(CONFIG_VDSO32),$(Q)$(MAKE) \ 423 $(build)=arch/powerpc/kernel/vdso include/generated/vdso32-offsets.h) 424 $(if $(CONFIG_PPC64),$(Q)$(MAKE) \ 425 $(build)=arch/powerpc/kernel/vdso include/generated/vdso64-offsets.h) 426endif 427 428archprepare: checkbin 429 430archheaders: 431 $(Q)$(MAKE) $(build)=arch/powerpc/kernel/syscalls all 432 433ifdef CONFIG_STACKPROTECTOR 434prepare: stack_protector_prepare 435 436PHONY += stack_protector_prepare 437stack_protector_prepare: prepare0 438ifdef CONFIG_PPC64 439 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' include/generated/asm-offsets.h)) 440else 441 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' include/generated/asm-offsets.h)) 442endif 443endif 444 445PHONY += checkbin 446# Check toolchain versions: 447# - gcc-4.6 is the minimum kernel-wide version so nothing required. 448checkbin: 449 @if test "x${CONFIG_LD_IS_LLD}" != "xy" -a \ 450 "x$(call ld-ifversion, -le, 22400, y)" = "xy" ; then \ 451 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \ 452 echo 'in some circumstances.' ; \ 453 echo '*** binutils 2.23 do not define the TOC symbol ' ; \ 454 echo -n '*** Please use a different binutils version.' ; \ 455 false ; \ 456 fi 457