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 20# If we're on a ppc/ppc64/ppc64le machine use that defconfig, otherwise just use 21# ppc64_defconfig because we have nothing better to go on. 22uname := $(shell uname -m) 23KBUILD_DEFCONFIG := $(if $(filter ppc%,$(uname)),$(uname),ppc64)_defconfig 24 25new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi) 26 27ifeq ($(new_nm),y) 28NM := $(NM) --synthetic 29endif 30 31# BITS is used as extension for files which are available in a 32 bit 32# and a 64 bit version to simplify shared Makefiles. 33# e.g.: obj-y += foo_$(BITS).o 34export BITS 35 36ifdef CONFIG_PPC64 37 BITS := 64 38else 39 BITS := 32 40endif 41 42machine-y = ppc 43machine-$(CONFIG_PPC64) += 64 44machine-$(CONFIG_CPU_LITTLE_ENDIAN) += le 45UTS_MACHINE := $(subst $(space),,$(machine-y)) 46 47# XXX This needs to be before we override LD below 48ifdef CONFIG_PPC32 49KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o 50else 51ifeq ($(call ld-ifversion, -ge, 225000000, y),y) 52# Have the linker provide sfpr if possible. 53# There is a corresponding test in arch/powerpc/lib/Makefile 54KBUILD_LDFLAGS_MODULE += --save-restore-funcs 55else 56KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o 57endif 58endif 59 60ifdef CONFIG_CPU_LITTLE_ENDIAN 61KBUILD_CFLAGS += -mlittle-endian 62KBUILD_LDFLAGS += -EL 63LDEMULATION := lppc 64GNUTARGET := powerpcle 65MULTIPLEWORD := -mno-multiple 66KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect) 67else 68KBUILD_CFLAGS += $(call cc-option,-mbig-endian) 69KBUILD_LDFLAGS += -EB 70LDEMULATION := ppc 71GNUTARGET := powerpc 72MULTIPLEWORD := -mmultiple 73endif 74 75ifdef CONFIG_PPC64 76ifndef CONFIG_CC_IS_CLANG 77cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1) 78cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mcall-aixdesc) 79aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1) 80aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mabi=elfv2 81endif 82endif 83 84ifndef CONFIG_CC_IS_CLANG 85 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align 86endif 87 88cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) 89cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian 90aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) 91aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian 92 93ifeq ($(HAS_BIARCH),y) 94KBUILD_CFLAGS += -m$(BITS) 95KBUILD_AFLAGS += -m$(BITS) -Wl,-a$(BITS) 96KBUILD_LDFLAGS += -m elf$(BITS)$(LDEMULATION) 97endif 98 99cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard=tls 100ifdef CONFIG_PPC64 101cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r13 102else 103cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r2 104endif 105 106LDFLAGS_vmlinux-y := -Bstatic 107LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie 108LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y) 109 110ifdef CONFIG_PPC64 111ifeq ($(call cc-option-yn,-mcmodel=medium),y) 112 # -mcmodel=medium breaks modules because it uses 32bit offsets from 113 # the TOC pointer to create pointers where possible. Pointers into the 114 # percpu data area are created by this method. 115 # 116 # The kernel module loader relocates the percpu data section from the 117 # original location (starting with 0xd...) to somewhere in the base 118 # kernel percpu data space (starting with 0xc...). We need a full 119 # 64bit relocation for this to work, hence -mcmodel=large. 120 KBUILD_CFLAGS_MODULE += -mcmodel=large 121else 122 export NO_MINIMAL_TOC := -mno-minimal-toc 123endif 124endif 125 126CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no) 127ifndef CONFIG_CC_IS_CLANG 128ifdef CONFIG_CPU_LITTLE_ENDIAN 129CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc)) 130AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2) 131else 132CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1) 133CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc) 134AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1) 135endif 136endif 137CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc)) 138CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions) 139 140# Clang unconditionally reserves r2 on ppc32 and does not support the flag 141# https://bugs.llvm.org/show_bug.cgi?id=39555 142CFLAGS-$(CONFIG_PPC32) := $(call cc-option, -ffixed-r2) 143 144# Clang doesn't support -mmultiple / -mno-multiple 145# https://bugs.llvm.org/show_bug.cgi?id=39556 146CFLAGS-$(CONFIG_PPC32) += $(call cc-option, $(MULTIPLEWORD)) 147 148CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata) 149 150ifdef CONFIG_PPC_BOOK3S_64 151ifdef CONFIG_CPU_LITTLE_ENDIAN 152CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8 153CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power9,-mtune=power8) 154else 155CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5)) 156CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power4 157endif 158else ifdef CONFIG_PPC_BOOK3E_64 159CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64 160endif 161 162ifdef CONFIG_FUNCTION_TRACER 163CC_FLAGS_FTRACE := -pg 164ifdef CONFIG_MPROFILE_KERNEL 165CC_FLAGS_FTRACE += -mprofile-kernel 166endif 167# Work around gcc code-gen bugs with -pg / -fno-omit-frame-pointer in gcc <= 4.8 168# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44199 169# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52828 170ifndef CONFIG_CC_IS_CLANG 171CC_FLAGS_FTRACE += $(call cc-ifversion, -lt, 0409, -mno-sched-epilog) 172endif 173endif 174 175CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU)) 176AFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU)) 177 178# Altivec option not allowed with e500mc64 in GCC. 179ifdef CONFIG_ALTIVEC 180E5500_CPU := -mcpu=powerpc64 181else 182E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64) 183endif 184CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU) 185CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU)) 186 187asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1) 188 189KBUILD_CPPFLAGS += -I $(srctree)/arch/$(ARCH) $(asinstr) 190KBUILD_AFLAGS += $(AFLAGS-y) 191KBUILD_CFLAGS += $(call cc-option,-msoft-float) 192KBUILD_CFLAGS += -pipe $(CFLAGS-y) 193CPP = $(CC) -E $(KBUILD_CFLAGS) 194 195CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__ 196ifdef CONFIG_CPU_BIG_ENDIAN 197CHECKFLAGS += -D__BIG_ENDIAN__ 198else 199CHECKFLAGS += -D__LITTLE_ENDIAN__ 200endif 201 202ifdef CONFIG_476FPE_ERR46 203 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \ 204 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds 205endif 206 207# No AltiVec or VSX instructions when building kernel 208KBUILD_CFLAGS += $(call cc-option,-mno-altivec) 209KBUILD_CFLAGS += $(call cc-option,-mno-vsx) 210 211# No SPE instruction when building kernel 212# (We use all available options to help semi-broken compilers) 213KBUILD_CFLAGS += $(call cc-option,-mno-spe) 214KBUILD_CFLAGS += $(call cc-option,-mspe=no) 215 216# Don't emit .eh_frame since we have no use for it 217KBUILD_CFLAGS += -fno-asynchronous-unwind-tables 218 219# Never use string load/store instructions as they are 220# often slow when they are implemented at all 221KBUILD_CFLAGS += $(call cc-option,-mno-string) 222 223cpu-as-$(CONFIG_40x) += -Wa,-m405 224cpu-as-$(CONFIG_44x) += -Wa,-m440 225cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec) 226cpu-as-$(CONFIG_E500) += -Wa,-me500 227 228# When using '-many -mpower4' gas will first try and find a matching power4 229# mnemonic and failing that it will allow any valid mnemonic that GAS knows 230# about. GCC will pass -many to GAS when assembling, clang does not. 231cpu-as-$(CONFIG_PPC_BOOK3S_64) += -Wa,-mpower4 -Wa,-many 232cpu-as-$(CONFIG_PPC_E500MC) += $(call as-option,-Wa$(comma)-me500mc) 233 234KBUILD_AFLAGS += $(cpu-as-y) 235KBUILD_CFLAGS += $(cpu-as-y) 236 237KBUILD_AFLAGS += $(aflags-y) 238KBUILD_CFLAGS += $(cflags-y) 239 240head-$(CONFIG_PPC64) := arch/powerpc/kernel/head_64.o 241head-$(CONFIG_PPC_BOOK3S_32) := arch/powerpc/kernel/head_book3s_32.o 242head-$(CONFIG_PPC_8xx) := arch/powerpc/kernel/head_8xx.o 243head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o 244head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o 245head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o 246 247head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o 248head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o 249head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o 250head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o 251 252# See arch/powerpc/Kbuild for content of core part of the kernel 253core-y += arch/powerpc/ 254 255drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/ 256 257# Default to zImage, override when needed 258all: zImage 259 260# With make 3.82 we cannot mix normal and wildcard targets 261BOOT_TARGETS1 := zImage zImage.initrd uImage 262BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.% 263 264PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2) 265 266boot := arch/$(ARCH)/boot 267 268$(BOOT_TARGETS1): vmlinux 269 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 270$(BOOT_TARGETS2): vmlinux 271 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 272 273 274PHONY += bootwrapper_install 275bootwrapper_install: 276 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 277 278# Used to create 'merged defconfigs' 279# To use it $(call) it with the first argument as the base defconfig 280# and the second argument as a space separated list of .config files to merge, 281# without the .config suffix. 282define merge_into_defconfig 283 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ 284 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \ 285 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config) 286 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 287endef 288 289PHONY += pseries_le_defconfig 290pseries_le_defconfig: 291 $(call merge_into_defconfig,pseries_defconfig,le) 292 293PHONY += ppc64le_defconfig 294ppc64le_defconfig: 295 $(call merge_into_defconfig,ppc64_defconfig,le) 296 297PHONY += ppc64le_guest_defconfig 298ppc64le_guest_defconfig: 299 $(call merge_into_defconfig,ppc64_defconfig,le guest) 300 301PHONY += ppc64_guest_defconfig 302ppc64_guest_defconfig: 303 $(call merge_into_defconfig,ppc64_defconfig,be guest) 304 305PHONY += powernv_be_defconfig 306powernv_be_defconfig: 307 $(call merge_into_defconfig,powernv_defconfig,be) 308 309PHONY += mpc85xx_defconfig 310mpc85xx_defconfig: 311 $(call merge_into_defconfig,mpc85xx_base.config,\ 312 85xx-32bit 85xx-hw fsl-emb-nonhw) 313 314PHONY += mpc85xx_smp_defconfig 315mpc85xx_smp_defconfig: 316 $(call merge_into_defconfig,mpc85xx_base.config,\ 317 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw) 318 319PHONY += corenet32_smp_defconfig 320corenet32_smp_defconfig: 321 $(call merge_into_defconfig,corenet_base.config,\ 322 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa) 323 324PHONY += corenet64_smp_defconfig 325corenet64_smp_defconfig: 326 $(call merge_into_defconfig,corenet_base.config,\ 327 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa) 328 329PHONY += mpc86xx_defconfig 330mpc86xx_defconfig: 331 $(call merge_into_defconfig,mpc86xx_base.config,\ 332 86xx-hw fsl-emb-nonhw) 333 334PHONY += mpc86xx_smp_defconfig 335mpc86xx_smp_defconfig: 336 $(call merge_into_defconfig,mpc86xx_base.config,\ 337 86xx-smp 86xx-hw fsl-emb-nonhw) 338 339PHONY += ppc32_allmodconfig 340ppc32_allmodconfig: 341 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \ 342 -f $(srctree)/Makefile allmodconfig 343 344PHONY += ppc_defconfig 345ppc_defconfig: 346 $(call merge_into_defconfig,book3s_32.config,) 347 348PHONY += ppc64le_allmodconfig 349ppc64le_allmodconfig: 350 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \ 351 -f $(srctree)/Makefile allmodconfig 352 353PHONY += ppc64_book3e_allmodconfig 354ppc64_book3e_allmodconfig: 355 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \ 356 -f $(srctree)/Makefile allmodconfig 357 358define archhelp 359 @echo '* zImage - Build default images selected by kernel config' 360 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)' 361 @echo ' uImage - U-Boot native image format' 362 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older' 363 @echo ' versions which do not support device trees' 364 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob' 365 @echo ' simpleImage.<dt> - Firmware independent image.' 366 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)' 367 @echo ' install - Install kernel using' 368 @echo ' (your) ~/bin/$(INSTALLKERNEL) or' 369 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 370 @echo ' install to $$(INSTALL_PATH) and run lilo' 371 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs' 372 @echo '' 373 @echo ' Targets with <dt> embed a device tree blob inside the image' 374 @echo ' These targets support board with firmware that does not' 375 @echo ' support passing a device tree directly. Replace <dt> with the' 376 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory' 377 @echo ' (minus the .dts extension).' 378endef 379 380PHONY += install 381install: 382 $(Q)$(MAKE) $(build)=$(boot) install 383 384PHONY += vdso_install 385vdso_install: 386ifdef CONFIG_PPC64 387 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@ 388endif 389ifdef CONFIG_VDSO32 390 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@ 391endif 392 393archclean: 394 $(Q)$(MAKE) $(clean)=$(boot) 395 396archprepare: checkbin 397 398archheaders: 399 $(Q)$(MAKE) $(build)=arch/powerpc/kernel/syscalls all 400 401ifdef CONFIG_STACKPROTECTOR 402prepare: stack_protector_prepare 403 404PHONY += stack_protector_prepare 405stack_protector_prepare: prepare0 406ifdef CONFIG_PPC64 407 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' include/generated/asm-offsets.h)) 408else 409 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' include/generated/asm-offsets.h)) 410endif 411endif 412 413ifdef CONFIG_SMP 414prepare: task_cpu_prepare 415 416PHONY += task_cpu_prepare 417task_cpu_prepare: prepare0 418 $(eval KBUILD_CFLAGS += -D_TASK_CPU=$(shell awk '{if ($$2 == "TASK_CPU") print $$3;}' include/generated/asm-offsets.h)) 419endif 420 421PHONY += checkbin 422# Check toolchain versions: 423# - gcc-4.6 is the minimum kernel-wide version so nothing required. 424checkbin: 425 @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \ 426 && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \ 427 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \ 428 echo 'in some circumstances.' ; \ 429 echo -n '*** Please use a different binutils version.' ; \ 430 false ; \ 431 fi 432