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 42ifdef CONFIG_PPC64 43new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi) 44 45ifeq ($(new_nm),y) 46NM := $(NM) --synthetic 47endif 48endif 49 50# BITS is used as extension for files which are available in a 32 bit 51# and a 64 bit version to simplify shared Makefiles. 52# e.g.: obj-y += foo_$(BITS).o 53export BITS 54 55ifdef CONFIG_PPC64 56 BITS := 64 57else 58 BITS := 32 59endif 60 61machine-y = ppc 62machine-$(CONFIG_PPC64) += 64 63machine-$(CONFIG_CPU_LITTLE_ENDIAN) += le 64UTS_MACHINE := $(subst $(space),,$(machine-y)) 65 66# XXX This needs to be before we override LD below 67ifdef CONFIG_PPC32 68KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o 69else 70KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/powerpc/kernel/module.lds 71ifeq ($(call ld-ifversion, -ge, 225000000, y),y) 72# Have the linker provide sfpr if possible. 73# There is a corresponding test in arch/powerpc/lib/Makefile 74KBUILD_LDFLAGS_MODULE += --save-restore-funcs 75else 76KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o 77endif 78endif 79 80ifdef CONFIG_CPU_LITTLE_ENDIAN 81KBUILD_CFLAGS += -mlittle-endian 82KBUILD_LDFLAGS += -EL 83LDEMULATION := lppc 84GNUTARGET := powerpcle 85MULTIPLEWORD := -mno-multiple 86KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect) 87else 88KBUILD_CFLAGS += $(call cc-option,-mbig-endian) 89KBUILD_LDFLAGS += -EB 90LDEMULATION := ppc 91GNUTARGET := powerpc 92MULTIPLEWORD := -mmultiple 93endif 94 95ifdef CONFIG_PPC64 96cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1) 97cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mcall-aixdesc) 98aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1) 99aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mabi=elfv2 100endif 101 102ifndef CONFIG_CC_IS_CLANG 103 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align 104endif 105 106cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) 107cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian 108aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) 109aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian 110 111ifeq ($(HAS_BIARCH),y) 112KBUILD_CFLAGS += -m$(BITS) 113KBUILD_AFLAGS += -m$(BITS) -Wl,-a$(BITS) 114KBUILD_LDFLAGS += -m elf$(BITS)$(LDEMULATION) 115KBUILD_ARFLAGS += --target=elf$(BITS)-$(GNUTARGET) 116endif 117 118cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard=tls 119ifdef CONFIG_PPC64 120cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r13 121else 122cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r2 123endif 124 125LDFLAGS_vmlinux-y := -Bstatic 126LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie 127LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y) 128LDFLAGS_vmlinux += $(call ld-option,--orphan-handling=warn) 129 130ifdef CONFIG_PPC64 131ifeq ($(call cc-option-yn,-mcmodel=medium),y) 132 # -mcmodel=medium breaks modules because it uses 32bit offsets from 133 # the TOC pointer to create pointers where possible. Pointers into the 134 # percpu data area are created by this method. 135 # 136 # The kernel module loader relocates the percpu data section from the 137 # original location (starting with 0xd...) to somewhere in the base 138 # kernel percpu data space (starting with 0xc...). We need a full 139 # 64bit relocation for this to work, hence -mcmodel=large. 140 KBUILD_CFLAGS_MODULE += -mcmodel=large 141else 142 export NO_MINIMAL_TOC := -mno-minimal-toc 143endif 144endif 145 146CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no) 147ifdef CONFIG_CPU_LITTLE_ENDIAN 148CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc)) 149AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2) 150else 151CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1) 152CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc) 153AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1) 154endif 155CFLAGS-$(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 185# Work around gcc code-gen bugs with -pg / -fno-omit-frame-pointer in gcc <= 4.8 186# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44199 187# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52828 188ifndef CONFIG_CC_IS_CLANG 189CC_FLAGS_FTRACE += $(call cc-ifversion, -lt, 0409, -mno-sched-epilog) 190endif 191endif 192 193CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU)) 194 195# Altivec option not allowed with e500mc64 in GCC. 196ifdef CONFIG_ALTIVEC 197E5500_CPU := -mcpu=powerpc64 198else 199E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64) 200endif 201CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU) 202CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU)) 203 204ifdef CONFIG_PPC32 205ifdef CONFIG_PPC_E500MC 206CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc) 207else 208CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc) 209endif 210endif 211 212asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1) 213 214KBUILD_CPPFLAGS += -I $(srctree)/arch/$(ARCH) $(asinstr) 215KBUILD_AFLAGS += $(AFLAGS-y) 216KBUILD_CFLAGS += $(call cc-option,-msoft-float) 217KBUILD_CFLAGS += -pipe $(CFLAGS-y) 218CPP = $(CC) -E $(KBUILD_CFLAGS) 219 220CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__ 221ifdef CONFIG_CPU_BIG_ENDIAN 222CHECKFLAGS += -D__BIG_ENDIAN__ 223else 224CHECKFLAGS += -D__LITTLE_ENDIAN__ 225endif 226 227ifdef CONFIG_476FPE_ERR46 228 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \ 229 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds 230endif 231 232# No AltiVec or VSX instructions when building kernel 233KBUILD_CFLAGS += $(call cc-option,-mno-altivec) 234KBUILD_CFLAGS += $(call cc-option,-mno-vsx) 235 236# No SPE instruction when building kernel 237# (We use all available options to help semi-broken compilers) 238KBUILD_CFLAGS += $(call cc-option,-mno-spe) 239KBUILD_CFLAGS += $(call cc-option,-mspe=no) 240 241# FIXME: the module load should be taught about the additional relocs 242# generated by this. 243# revert to pre-gcc-4.4 behaviour of .eh_frame 244KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm) 245 246# Never use string load/store instructions as they are 247# often slow when they are implemented at all 248KBUILD_CFLAGS += $(call cc-option,-mno-string) 249 250cpu-as-$(CONFIG_4xx) += -Wa,-m405 251cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec) 252cpu-as-$(CONFIG_E200) += -Wa,-me200 253cpu-as-$(CONFIG_E500) += -Wa,-me500 254 255# When using '-many -mpower4' gas will first try and find a matching power4 256# mnemonic and failing that it will allow any valid mnemonic that GAS knows 257# about. GCC will pass -many to GAS when assembling, clang does not. 258cpu-as-$(CONFIG_PPC_BOOK3S_64) += -Wa,-mpower4 -Wa,-many 259cpu-as-$(CONFIG_PPC_E500MC) += $(call as-option,-Wa$(comma)-me500mc) 260 261KBUILD_AFLAGS += $(cpu-as-y) 262KBUILD_CFLAGS += $(cpu-as-y) 263 264KBUILD_AFLAGS += $(aflags-y) 265KBUILD_CFLAGS += $(cflags-y) 266 267head-y := arch/powerpc/kernel/head_$(BITS).o 268head-$(CONFIG_PPC_8xx) := arch/powerpc/kernel/head_8xx.o 269head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o 270head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o 271head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o 272 273head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o 274head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o 275head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o 276head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o 277 278# See arch/powerpc/Kbuild for content of core part of the kernel 279core-y += arch/powerpc/ 280 281drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/ 282 283# Default to zImage, override when needed 284all: zImage 285 286# With make 3.82 we cannot mix normal and wildcard targets 287BOOT_TARGETS1 := zImage zImage.initrd uImage 288BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.% 289 290PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2) 291 292boot := arch/$(ARCH)/boot 293 294$(BOOT_TARGETS1): vmlinux 295 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 296$(BOOT_TARGETS2): vmlinux 297 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 298 299 300bootwrapper_install: 301 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 302 303# Used to create 'merged defconfigs' 304# To use it $(call) it with the first argument as the base defconfig 305# and the second argument as a space separated list of .config files to merge, 306# without the .config suffix. 307define merge_into_defconfig 308 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ 309 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \ 310 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config) 311 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 312endef 313 314PHONY += pseries_le_defconfig 315pseries_le_defconfig: 316 $(call merge_into_defconfig,pseries_defconfig,le) 317 318PHONY += ppc64le_defconfig 319ppc64le_defconfig: 320 $(call merge_into_defconfig,ppc64_defconfig,le) 321 322PHONY += ppc64le_guest_defconfig 323ppc64le_guest_defconfig: 324 $(call merge_into_defconfig,ppc64_defconfig,le guest) 325 326PHONY += ppc64_guest_defconfig 327ppc64_guest_defconfig: 328 $(call merge_into_defconfig,ppc64_defconfig,be guest) 329 330PHONY += powernv_be_defconfig 331powernv_be_defconfig: 332 $(call merge_into_defconfig,powernv_defconfig,be) 333 334PHONY += mpc85xx_defconfig 335mpc85xx_defconfig: 336 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\ 337 85xx-32bit 85xx-hw fsl-emb-nonhw) 338 339PHONY += mpc85xx_smp_defconfig 340mpc85xx_smp_defconfig: 341 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\ 342 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw) 343 344PHONY += corenet32_smp_defconfig 345corenet32_smp_defconfig: 346 $(call merge_into_defconfig,corenet_basic_defconfig,\ 347 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa) 348 349PHONY += corenet64_smp_defconfig 350corenet64_smp_defconfig: 351 $(call merge_into_defconfig,corenet_basic_defconfig,\ 352 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa) 353 354PHONY += mpc86xx_defconfig 355mpc86xx_defconfig: 356 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\ 357 86xx-hw fsl-emb-nonhw) 358 359PHONY += mpc86xx_smp_defconfig 360mpc86xx_smp_defconfig: 361 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\ 362 86xx-smp 86xx-hw fsl-emb-nonhw) 363 364PHONY += ppc32_allmodconfig 365ppc32_allmodconfig: 366 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \ 367 -f $(srctree)/Makefile allmodconfig 368 369PHONY += ppc_defconfig 370ppc_defconfig: 371 $(call merge_into_defconfig,book3s_32.config,) 372 373PHONY += ppc64le_allmodconfig 374ppc64le_allmodconfig: 375 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \ 376 -f $(srctree)/Makefile allmodconfig 377 378PHONY += ppc64_book3e_allmodconfig 379ppc64_book3e_allmodconfig: 380 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \ 381 -f $(srctree)/Makefile allmodconfig 382 383define archhelp 384 @echo '* zImage - Build default images selected by kernel config' 385 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)' 386 @echo ' uImage - U-Boot native image format' 387 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older' 388 @echo ' versions which do not support device trees' 389 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob' 390 @echo ' simpleImage.<dt> - Firmware independent image.' 391 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)' 392 @echo ' install - Install kernel using' 393 @echo ' (your) ~/bin/$(INSTALLKERNEL) or' 394 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 395 @echo ' install to $$(INSTALL_PATH) and run lilo' 396 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs' 397 @echo '' 398 @echo ' Targets with <dt> embed a device tree blob inside the image' 399 @echo ' These targets support board with firmware that does not' 400 @echo ' support passing a device tree directly. Replace <dt> with the' 401 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory' 402 @echo ' (minus the .dts extension).' 403endef 404 405install: 406 $(Q)$(MAKE) $(build)=$(boot) install 407 408vdso_install: 409ifdef CONFIG_PPC64 410 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@ 411endif 412ifdef CONFIG_VDSO32 413 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@ 414endif 415 416archclean: 417 $(Q)$(MAKE) $(clean)=$(boot) 418 419archprepare: checkbin 420 421archheaders: 422 $(Q)$(MAKE) $(build)=arch/powerpc/kernel/syscalls all 423 424ifdef CONFIG_STACKPROTECTOR 425prepare: stack_protector_prepare 426 427stack_protector_prepare: prepare0 428ifdef CONFIG_PPC64 429 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' include/generated/asm-offsets.h)) 430else 431 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' include/generated/asm-offsets.h)) 432endif 433endif 434 435ifdef CONFIG_SMP 436prepare: task_cpu_prepare 437 438task_cpu_prepare: prepare0 439 $(eval KBUILD_CFLAGS += -D_TASK_CPU=$(shell awk '{if ($$2 == "TASK_CPU") print $$3;}' include/generated/asm-offsets.h)) 440endif 441 442# Check toolchain versions: 443# - gcc-4.6 is the minimum kernel-wide version so nothing required. 444checkbin: 445 @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \ 446 && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \ 447 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \ 448 echo 'in some circumstances.' ; \ 449 echo -n '*** Please use a different binutils version.' ; \ 450 false ; \ 451 fi 452