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, 225000000, 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 := $(LDFLAGS_vmlinux-y) 126 127ifdef CONFIG_PPC64 128ifeq ($(call cc-option-yn,-mcmodel=medium),y) 129 # -mcmodel=medium breaks modules because it uses 32bit offsets from 130 # the TOC pointer to create pointers where possible. Pointers into the 131 # percpu data area are created by this method. 132 # 133 # The kernel module loader relocates the percpu data section from the 134 # original location (starting with 0xd...) to somewhere in the base 135 # kernel percpu data space (starting with 0xc...). We need a full 136 # 64bit relocation for this to work, hence -mcmodel=large. 137 KBUILD_CFLAGS_MODULE += -mcmodel=large 138else 139 export NO_MINIMAL_TOC := -mno-minimal-toc 140endif 141endif 142 143CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no) 144ifndef CONFIG_CC_IS_CLANG 145ifdef CONFIG_CPU_LITTLE_ENDIAN 146CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc)) 147AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2) 148else 149CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1) 150CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc) 151AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1) 152endif 153endif 154CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc)) 155CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions) 156 157# Clang unconditionally reserves r2 on ppc32 and does not support the flag 158# https://bugs.llvm.org/show_bug.cgi?id=39555 159CFLAGS-$(CONFIG_PPC32) := $(call cc-option, -ffixed-r2) 160 161# Clang doesn't support -mmultiple / -mno-multiple 162# https://bugs.llvm.org/show_bug.cgi?id=39556 163CFLAGS-$(CONFIG_PPC32) += $(call cc-option, $(MULTIPLEWORD)) 164 165CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata) 166 167ifdef CONFIG_PPC_BOOK3S_64 168ifdef CONFIG_CPU_LITTLE_ENDIAN 169CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8 170CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power9,-mtune=power8) 171else 172CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5)) 173CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mcpu=power5,-mcpu=power4) 174endif 175else 176CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64 177endif 178 179ifdef CONFIG_FUNCTION_TRACER 180CC_FLAGS_FTRACE := -pg 181ifdef CONFIG_MPROFILE_KERNEL 182CC_FLAGS_FTRACE += -mprofile-kernel 183endif 184# Work around gcc code-gen bugs with -pg / -fno-omit-frame-pointer in gcc <= 4.8 185# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44199 186# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52828 187ifndef CONFIG_CC_IS_CLANG 188CC_FLAGS_FTRACE += $(call cc-ifversion, -lt, 0409, -mno-sched-epilog) 189endif 190endif 191 192CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU)) 193 194# Altivec option not allowed with e500mc64 in GCC. 195ifdef CONFIG_ALTIVEC 196E5500_CPU := -mcpu=powerpc64 197else 198E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64) 199endif 200CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU) 201CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU)) 202 203ifdef CONFIG_PPC32 204ifdef CONFIG_PPC_E500MC 205CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc) 206else 207CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc) 208endif 209endif 210 211asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1) 212 213KBUILD_CPPFLAGS += -I $(srctree)/arch/$(ARCH) $(asinstr) 214KBUILD_AFLAGS += $(AFLAGS-y) 215KBUILD_CFLAGS += $(call cc-option,-msoft-float) 216KBUILD_CFLAGS += -pipe $(CFLAGS-y) 217CPP = $(CC) -E $(KBUILD_CFLAGS) 218 219CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__ 220ifdef CONFIG_CPU_BIG_ENDIAN 221CHECKFLAGS += -D__BIG_ENDIAN__ 222else 223CHECKFLAGS += -D__LITTLE_ENDIAN__ 224endif 225 226ifdef CONFIG_476FPE_ERR46 227 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \ 228 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds 229endif 230 231# No AltiVec or VSX instructions when building kernel 232KBUILD_CFLAGS += $(call cc-option,-mno-altivec) 233KBUILD_CFLAGS += $(call cc-option,-mno-vsx) 234 235# No SPE instruction when building kernel 236# (We use all available options to help semi-broken compilers) 237KBUILD_CFLAGS += $(call cc-option,-mno-spe) 238KBUILD_CFLAGS += $(call cc-option,-mspe=no) 239 240# Don't emit .eh_frame since we have no use for it 241KBUILD_CFLAGS += -fno-asynchronous-unwind-tables 242 243# Never use string load/store instructions as they are 244# often slow when they are implemented at all 245KBUILD_CFLAGS += $(call cc-option,-mno-string) 246 247cpu-as-$(CONFIG_40x) += -Wa,-m405 248cpu-as-$(CONFIG_44x) += -Wa,-m440 249cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec) 250cpu-as-$(CONFIG_E500) += -Wa,-me500 251 252# When using '-many -mpower4' gas will first try and find a matching power4 253# mnemonic and failing that it will allow any valid mnemonic that GAS knows 254# about. GCC will pass -many to GAS when assembling, clang does not. 255cpu-as-$(CONFIG_PPC_BOOK3S_64) += -Wa,-mpower4 -Wa,-many 256cpu-as-$(CONFIG_PPC_E500MC) += $(call as-option,-Wa$(comma)-me500mc) 257 258KBUILD_AFLAGS += $(cpu-as-y) 259KBUILD_CFLAGS += $(cpu-as-y) 260 261KBUILD_AFLAGS += $(aflags-y) 262KBUILD_CFLAGS += $(cflags-y) 263 264head-$(CONFIG_PPC64) := arch/powerpc/kernel/head_64.o 265head-$(CONFIG_PPC_BOOK3S_32) := arch/powerpc/kernel/head_book3s_32.o 266head-$(CONFIG_PPC_8xx) := arch/powerpc/kernel/head_8xx.o 267head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o 268head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o 269head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o 270 271head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o 272head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o 273head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o 274head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o 275 276# See arch/powerpc/Kbuild for content of core part of the kernel 277core-y += arch/powerpc/ 278 279drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/ 280 281# Default to zImage, override when needed 282all: zImage 283 284# With make 3.82 we cannot mix normal and wildcard targets 285BOOT_TARGETS1 := zImage zImage.initrd uImage 286BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.% 287 288PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2) 289 290boot := arch/$(ARCH)/boot 291 292$(BOOT_TARGETS1): vmlinux 293 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 294$(BOOT_TARGETS2): vmlinux 295 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 296 297 298PHONY += bootwrapper_install 299bootwrapper_install: 300 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 301 302# Used to create 'merged defconfigs' 303# To use it $(call) it with the first argument as the base defconfig 304# and the second argument as a space separated list of .config files to merge, 305# without the .config suffix. 306define merge_into_defconfig 307 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ 308 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \ 309 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config) 310 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 311endef 312 313PHONY += pseries_le_defconfig 314pseries_le_defconfig: 315 $(call merge_into_defconfig,pseries_defconfig,le) 316 317PHONY += ppc64le_defconfig 318ppc64le_defconfig: 319 $(call merge_into_defconfig,ppc64_defconfig,le) 320 321PHONY += ppc64le_guest_defconfig 322ppc64le_guest_defconfig: 323 $(call merge_into_defconfig,ppc64_defconfig,le guest) 324 325PHONY += ppc64_guest_defconfig 326ppc64_guest_defconfig: 327 $(call merge_into_defconfig,ppc64_defconfig,be guest) 328 329PHONY += powernv_be_defconfig 330powernv_be_defconfig: 331 $(call merge_into_defconfig,powernv_defconfig,be) 332 333PHONY += mpc85xx_defconfig 334mpc85xx_defconfig: 335 $(call merge_into_defconfig,mpc85xx_base.config,\ 336 85xx-32bit 85xx-hw fsl-emb-nonhw) 337 338PHONY += mpc85xx_smp_defconfig 339mpc85xx_smp_defconfig: 340 $(call merge_into_defconfig,mpc85xx_base.config,\ 341 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw) 342 343PHONY += corenet32_smp_defconfig 344corenet32_smp_defconfig: 345 $(call merge_into_defconfig,corenet_base.config,\ 346 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa) 347 348PHONY += corenet64_smp_defconfig 349corenet64_smp_defconfig: 350 $(call merge_into_defconfig,corenet_base.config,\ 351 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa) 352 353PHONY += mpc86xx_defconfig 354mpc86xx_defconfig: 355 $(call merge_into_defconfig,mpc86xx_base.config,\ 356 86xx-hw fsl-emb-nonhw) 357 358PHONY += mpc86xx_smp_defconfig 359mpc86xx_smp_defconfig: 360 $(call merge_into_defconfig,mpc86xx_base.config,\ 361 86xx-smp 86xx-hw fsl-emb-nonhw) 362 363PHONY += ppc32_allmodconfig 364ppc32_allmodconfig: 365 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \ 366 -f $(srctree)/Makefile allmodconfig 367 368PHONY += ppc_defconfig 369ppc_defconfig: 370 $(call merge_into_defconfig,book3s_32.config,) 371 372PHONY += ppc64le_allmodconfig 373ppc64le_allmodconfig: 374 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \ 375 -f $(srctree)/Makefile allmodconfig 376 377PHONY += ppc64le_allnoconfig 378ppc64le_allnoconfig: 379 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/ppc64le.config \ 380 -f $(srctree)/Makefile allnoconfig 381 382PHONY += ppc64_book3e_allmodconfig 383ppc64_book3e_allmodconfig: 384 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \ 385 -f $(srctree)/Makefile allmodconfig 386 387define archhelp 388 @echo '* zImage - Build default images selected by kernel config' 389 @echo ' zImage.* - Compressed kernel image (arch/$(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 $$(INSTALL_PATH) and run lilo' 400 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs' 401 @echo '' 402 @echo ' Targets with <dt> embed a device tree blob inside the image' 403 @echo ' These targets support board with firmware that does not' 404 @echo ' support passing a device tree directly. Replace <dt> with the' 405 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory' 406 @echo ' (minus the .dts extension).' 407endef 408 409PHONY += install 410install: 411 $(Q)$(MAKE) $(build)=$(boot) install 412 413archclean: 414 $(Q)$(MAKE) $(clean)=$(boot) 415 416ifeq ($(KBUILD_EXTMOD),) 417# We need to generate vdso-offsets.h before compiling certain files in kernel/. 418# In order to do that, we should use the archprepare target, but we can't since 419# asm-offsets.h is included in some files used to generate vdso-offsets.h, and 420# asm-offsets.h is built in prepare0, for which archprepare is a dependency. 421# Therefore we need to generate the header after prepare0 has been made, hence 422# this hack. 423prepare: vdso_prepare 424vdso_prepare: prepare0 425 $(if $(CONFIG_VDSO32),$(Q)$(MAKE) \ 426 $(build)=arch/powerpc/kernel/vdso32 include/generated/vdso32-offsets.h) 427 $(if $(CONFIG_PPC64),$(Q)$(MAKE) \ 428 $(build)=arch/powerpc/kernel/vdso64 include/generated/vdso64-offsets.h) 429endif 430 431archprepare: checkbin 432 433archheaders: 434 $(Q)$(MAKE) $(build)=arch/powerpc/kernel/syscalls all 435 436ifdef CONFIG_STACKPROTECTOR 437prepare: stack_protector_prepare 438 439PHONY += stack_protector_prepare 440stack_protector_prepare: prepare0 441ifdef CONFIG_PPC64 442 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' include/generated/asm-offsets.h)) 443else 444 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' include/generated/asm-offsets.h)) 445endif 446endif 447 448ifdef CONFIG_SMP 449prepare: task_cpu_prepare 450 451PHONY += task_cpu_prepare 452task_cpu_prepare: prepare0 453 $(eval KBUILD_CFLAGS += -D_TASK_CPU=$(shell awk '{if ($$2 == "TASK_CPU") print $$3;}' include/generated/asm-offsets.h)) 454endif 455 456PHONY += checkbin 457# Check toolchain versions: 458# - gcc-4.6 is the minimum kernel-wide version so nothing required. 459checkbin: 460 @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \ 461 && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \ 462 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \ 463 echo 'in some circumstances.' ; \ 464 echo -n '*** Please use a different binutils version.' ; \ 465 false ; \ 466 fi 467