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 := $(call cc-option-yn, -m32) 16 17# Set default 32 bits cross compilers for vdso and boot wrapper 18CROSS32_COMPILE ?= 19 20ifeq ($(HAS_BIARCH),y) 21ifeq ($(CROSS32_COMPILE),) 22ifdef CONFIG_PPC32 23# These options will be overridden by any -mcpu option that the CPU 24# or platform code sets later on the command line, but they are needed 25# to set a sane 32-bit cpu target for the 64-bit cross compiler which 26# may default to the wrong ISA. 27KBUILD_CFLAGS += -mcpu=powerpc 28KBUILD_AFLAGS += -mcpu=powerpc 29endif 30endif 31endif 32 33ifdef CONFIG_PPC_BOOK3S_32 34KBUILD_CFLAGS += -mcpu=powerpc 35endif 36 37# If we're on a ppc/ppc64/ppc64le machine use that defconfig, otherwise just use 38# ppc64_defconfig because we have nothing better to go on. 39uname := $(shell uname -m) 40KBUILD_DEFCONFIG := $(if $(filter ppc%,$(uname)),$(uname),ppc64)_defconfig 41 42new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi) 43 44ifeq ($(new_nm),y) 45NM := $(NM) --synthetic 46endif 47 48# BITS is used as extension for files which are available in a 32 bit 49# and a 64 bit version to simplify shared Makefiles. 50# e.g.: obj-y += foo_$(BITS).o 51export BITS 52 53ifdef CONFIG_PPC64 54 BITS := 64 55else 56 BITS := 32 57endif 58 59machine-y = ppc 60machine-$(CONFIG_PPC64) += 64 61machine-$(CONFIG_CPU_LITTLE_ENDIAN) += le 62UTS_MACHINE := $(subst $(space),,$(machine-y)) 63 64# XXX This needs to be before we override LD below 65ifdef CONFIG_PPC32 66KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o 67else 68ifeq ($(call ld-ifversion, -ge, 22500, y),y) 69# Have the linker provide sfpr if possible. 70# There is a corresponding test in arch/powerpc/lib/Makefile 71KBUILD_LDFLAGS_MODULE += --save-restore-funcs 72else 73KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o 74endif 75endif 76 77ifdef CONFIG_CPU_LITTLE_ENDIAN 78KBUILD_CFLAGS += -mlittle-endian 79KBUILD_LDFLAGS += -EL 80LDEMULATION := lppc 81GNUTARGET := powerpcle 82MULTIPLEWORD := -mno-multiple 83KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect) 84else 85KBUILD_CFLAGS += $(call cc-option,-mbig-endian) 86KBUILD_LDFLAGS += -EB 87LDEMULATION := ppc 88GNUTARGET := powerpc 89MULTIPLEWORD := -mmultiple 90endif 91 92ifdef CONFIG_PPC64 93ifndef CONFIG_CC_IS_CLANG 94cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1) 95cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mcall-aixdesc) 96aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1) 97aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mabi=elfv2 98endif 99endif 100 101ifndef CONFIG_CC_IS_CLANG 102 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align 103endif 104 105cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) 106cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian 107aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) 108aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian 109 110ifeq ($(HAS_BIARCH),y) 111KBUILD_CFLAGS += -m$(BITS) 112KBUILD_AFLAGS += -m$(BITS) -Wl,-a$(BITS) 113KBUILD_LDFLAGS += -m elf$(BITS)$(LDEMULATION) 114endif 115 116cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard=tls 117ifdef CONFIG_PPC64 118cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r13 119else 120cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r2 121endif 122 123LDFLAGS_vmlinux-y := -Bstatic 124LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie 125LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) += -z notext 126LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y) 127 128ifdef CONFIG_PPC64 129ifeq ($(call cc-option-yn,-mcmodel=medium),y) 130 # -mcmodel=medium breaks modules because it uses 32bit offsets from 131 # the TOC pointer to create pointers where possible. Pointers into the 132 # percpu data area are created by this method. 133 # 134 # The kernel module loader relocates the percpu data section from the 135 # original location (starting with 0xd...) to somewhere in the base 136 # kernel percpu data space (starting with 0xc...). We need a full 137 # 64bit relocation for this to work, hence -mcmodel=large. 138 KBUILD_CFLAGS_MODULE += -mcmodel=large 139else 140 export NO_MINIMAL_TOC := -mno-minimal-toc 141endif 142endif 143 144CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no) 145ifndef CONFIG_CC_IS_CLANG 146ifdef CONFIG_CPU_LITTLE_ENDIAN 147CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc)) 148AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2) 149else 150CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1) 151CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc) 152AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1) 153endif 154endif 155CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc)) 156CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions) 157 158# Clang unconditionally reserves r2 on ppc32 and does not support the flag 159# https://bugs.llvm.org/show_bug.cgi?id=39555 160CFLAGS-$(CONFIG_PPC32) := $(call cc-option, -ffixed-r2) 161 162# Clang doesn't support -mmultiple / -mno-multiple 163# https://bugs.llvm.org/show_bug.cgi?id=39556 164CFLAGS-$(CONFIG_PPC32) += $(call cc-option, $(MULTIPLEWORD)) 165 166CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata) 167 168ifdef CONFIG_PPC_BOOK3S_64 169ifdef CONFIG_CPU_LITTLE_ENDIAN 170CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8 171CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power9,-mtune=power8) 172else 173CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5)) 174CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mcpu=power5,-mcpu=power4) 175endif 176else 177CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64 178endif 179 180ifdef CONFIG_FUNCTION_TRACER 181CC_FLAGS_FTRACE := -pg 182ifdef CONFIG_MPROFILE_KERNEL 183CC_FLAGS_FTRACE += -mprofile-kernel 184endif 185endif 186 187CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU)) 188 189# Altivec option not allowed with e500mc64 in GCC. 190ifdef CONFIG_ALTIVEC 191E5500_CPU := -mcpu=powerpc64 192else 193E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64) 194endif 195CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU) 196CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU)) 197 198ifdef CONFIG_PPC32 199ifdef CONFIG_PPC_E500MC 200CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc) 201else 202CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc) 203endif 204endif 205 206asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1) 207 208KBUILD_CPPFLAGS += -I $(srctree)/arch/$(ARCH) $(asinstr) 209KBUILD_AFLAGS += $(AFLAGS-y) 210KBUILD_CFLAGS += $(call cc-option,-msoft-float) 211KBUILD_CFLAGS += -pipe $(CFLAGS-y) 212CPP = $(CC) -E $(KBUILD_CFLAGS) 213 214CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__ 215ifdef CONFIG_CPU_BIG_ENDIAN 216CHECKFLAGS += -D__BIG_ENDIAN__ 217else 218CHECKFLAGS += -D__LITTLE_ENDIAN__ 219endif 220 221ifdef CONFIG_476FPE_ERR46 222 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \ 223 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds 224endif 225 226# No AltiVec or VSX instructions when building kernel 227KBUILD_CFLAGS += $(call cc-option,-mno-altivec) 228KBUILD_CFLAGS += $(call cc-option,-mno-vsx) 229 230# No SPE instruction when building kernel 231# (We use all available options to help semi-broken compilers) 232KBUILD_CFLAGS += $(call cc-option,-mno-spe) 233KBUILD_CFLAGS += $(call cc-option,-mspe=no) 234 235# Don't emit .eh_frame since we have no use for it 236KBUILD_CFLAGS += -fno-asynchronous-unwind-tables 237 238# Never use string load/store instructions as they are 239# often slow when they are implemented at all 240KBUILD_CFLAGS += $(call cc-option,-mno-string) 241 242cpu-as-$(CONFIG_40x) += -Wa,-m405 243cpu-as-$(CONFIG_44x) += -Wa,-m440 244cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec) 245cpu-as-$(CONFIG_E500) += -Wa,-me500 246 247# When using '-many -mpower4' gas will first try and find a matching power4 248# mnemonic and failing that it will allow any valid mnemonic that GAS knows 249# about. GCC will pass -many to GAS when assembling, clang does not. 250cpu-as-$(CONFIG_PPC_BOOK3S_64) += -Wa,-mpower4 -Wa,-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 $$(INSTALL_PATH) and run lilo' 400 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs' 401 @echo '' 402 @echo ' Targets with <dt> embed a device tree blob inside the image' 403 @echo ' These targets support board with firmware that does not' 404 @echo ' support passing a device tree directly. Replace <dt> with the' 405 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory' 406 @echo ' (minus the .dts extension).' 407endef 408 409PHONY += install 410install: 411 sh -x $(srctree)/$(boot)/install.sh "$(KERNELRELEASE)" vmlinux \ 412 System.map "$(INSTALL_PATH)" 413 414archclean: 415 $(Q)$(MAKE) $(clean)=$(boot) 416 417ifeq ($(KBUILD_EXTMOD),) 418# We need to generate vdso-offsets.h before compiling certain files in kernel/. 419# In order to do that, we should use the archprepare target, but we can't since 420# asm-offsets.h is included in some files used to generate vdso-offsets.h, and 421# asm-offsets.h is built in prepare0, for which archprepare is a dependency. 422# Therefore we need to generate the header after prepare0 has been made, hence 423# this hack. 424prepare: vdso_prepare 425vdso_prepare: prepare0 426 $(if $(CONFIG_VDSO32),$(Q)$(MAKE) \ 427 $(build)=arch/powerpc/kernel/vdso32 include/generated/vdso32-offsets.h) 428 $(if $(CONFIG_PPC64),$(Q)$(MAKE) \ 429 $(build)=arch/powerpc/kernel/vdso64 include/generated/vdso64-offsets.h) 430endif 431 432archprepare: checkbin 433 434archheaders: 435 $(Q)$(MAKE) $(build)=arch/powerpc/kernel/syscalls all 436 437ifdef CONFIG_STACKPROTECTOR 438prepare: stack_protector_prepare 439 440PHONY += stack_protector_prepare 441stack_protector_prepare: prepare0 442ifdef CONFIG_PPC64 443 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' include/generated/asm-offsets.h)) 444else 445 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' include/generated/asm-offsets.h)) 446endif 447endif 448 449ifdef CONFIG_SMP 450ifdef CONFIG_PPC32 451prepare: task_cpu_prepare 452 453PHONY += task_cpu_prepare 454task_cpu_prepare: prepare0 455 $(eval KBUILD_CFLAGS += -D_TASK_CPU=$(shell awk '{if ($$2 == "TASK_CPU") print $$3;}' include/generated/asm-offsets.h)) 456 457endif # CONFIG_PPC32 458endif # CONFIG_SMP 459 460PHONY += checkbin 461# Check toolchain versions: 462# - gcc-4.6 is the minimum kernel-wide version so nothing required. 463checkbin: 464 @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \ 465 && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \ 466 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \ 467 echo 'in some circumstances.' ; \ 468 echo -n '*** Please use a different binutils version.' ; \ 469 false ; \ 470 fi 471