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 47ifeq ($(CONFIG_PPC64)$(CONFIG_LD_IS_BFD),yy) 48# Have the linker provide sfpr if possible. 49# There is a corresponding test in arch/powerpc/lib/Makefile 50KBUILD_LDFLAGS_MODULE += --save-restore-funcs 51else 52KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o 53endif 54 55ifdef CONFIG_CPU_LITTLE_ENDIAN 56KBUILD_CFLAGS += -mlittle-endian 57KBUILD_LDFLAGS += -EL 58LDEMULATION := lppc 59GNUTARGET := powerpcle 60MULTIPLEWORD := -mno-multiple 61KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect) 62else 63KBUILD_CFLAGS += $(call cc-option,-mbig-endian) 64KBUILD_LDFLAGS += -EB 65LDEMULATION := ppc 66GNUTARGET := powerpc 67MULTIPLEWORD := -mmultiple 68endif 69 70ifdef CONFIG_PPC64 71ifndef CONFIG_CC_IS_CLANG 72cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1) 73cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mcall-aixdesc) 74aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1) 75aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mabi=elfv2 76endif 77endif 78 79ifndef CONFIG_CC_IS_CLANG 80 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align 81endif 82 83cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) 84cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian 85aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) 86aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian 87 88ifeq ($(HAS_BIARCH),y) 89KBUILD_CFLAGS += -m$(BITS) 90KBUILD_AFLAGS += -m$(BITS) 91KBUILD_LDFLAGS += -m elf$(BITS)$(LDEMULATION) 92endif 93 94cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard=tls 95ifdef CONFIG_PPC64 96cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r13 97else 98cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r2 99endif 100 101LDFLAGS_vmlinux-y := -Bstatic 102LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie 103LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) += -z notext 104LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y) 105 106ifdef CONFIG_PPC64 107ifeq ($(call cc-option-yn,-mcmodel=medium),y) 108 # -mcmodel=medium breaks modules because it uses 32bit offsets from 109 # the TOC pointer to create pointers where possible. Pointers into the 110 # percpu data area are created by this method. 111 # 112 # The kernel module loader relocates the percpu data section from the 113 # original location (starting with 0xd...) to somewhere in the base 114 # kernel percpu data space (starting with 0xc...). We need a full 115 # 64bit relocation for this to work, hence -mcmodel=large. 116 KBUILD_CFLAGS_MODULE += -mcmodel=large 117else 118 export NO_MINIMAL_TOC := -mno-minimal-toc 119endif 120endif 121 122CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no) 123ifndef CONFIG_CC_IS_CLANG 124ifdef CONFIG_CPU_LITTLE_ENDIAN 125CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc)) 126AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2) 127else 128CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1) 129CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc) 130AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1) 131endif 132endif 133CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc)) 134CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions) 135 136# Clang unconditionally reserves r2 on ppc32 and does not support the flag 137# https://bugs.llvm.org/show_bug.cgi?id=39555 138CFLAGS-$(CONFIG_PPC32) := $(call cc-option, -ffixed-r2) 139 140# Clang doesn't support -mmultiple / -mno-multiple 141# https://bugs.llvm.org/show_bug.cgi?id=39556 142CFLAGS-$(CONFIG_PPC32) += $(call cc-option, $(MULTIPLEWORD)) 143 144CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata) 145 146ifdef CONFIG_PPC_BOOK3S_64 147ifdef CONFIG_CPU_LITTLE_ENDIAN 148CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8 149CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power9,-mtune=power8) 150else 151CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5)) 152CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power4 153endif 154else ifdef CONFIG_PPC_BOOK3E_64 155CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64 156endif 157 158ifdef CONFIG_FUNCTION_TRACER 159CC_FLAGS_FTRACE := -pg 160ifdef CONFIG_MPROFILE_KERNEL 161CC_FLAGS_FTRACE += -mprofile-kernel 162endif 163endif 164 165CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU)) 166AFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU)) 167 168# Altivec option not allowed with e500mc64 in GCC. 169ifdef CONFIG_ALTIVEC 170E5500_CPU := -mcpu=powerpc64 171else 172E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64) 173endif 174CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU) 175CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU)) 176 177asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1) 178 179KBUILD_CPPFLAGS += -I $(srctree)/arch/$(ARCH) $(asinstr) 180KBUILD_AFLAGS += $(AFLAGS-y) 181KBUILD_CFLAGS += $(call cc-option,-msoft-float) 182KBUILD_CFLAGS += -pipe $(CFLAGS-y) 183CPP = $(CC) -E $(KBUILD_CFLAGS) 184 185CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__ 186ifdef CONFIG_CPU_BIG_ENDIAN 187CHECKFLAGS += -D__BIG_ENDIAN__ 188else 189CHECKFLAGS += -D__LITTLE_ENDIAN__ 190endif 191 192ifdef CONFIG_476FPE_ERR46 193 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \ 194 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds 195endif 196 197# No AltiVec or VSX instructions when building kernel 198KBUILD_CFLAGS += $(call cc-option,-mno-altivec) 199KBUILD_CFLAGS += $(call cc-option,-mno-vsx) 200 201# No SPE instruction when building kernel 202# (We use all available options to help semi-broken compilers) 203KBUILD_CFLAGS += $(call cc-option,-mno-spe) 204KBUILD_CFLAGS += $(call cc-option,-mspe=no) 205 206# Don't emit .eh_frame since we have no use for it 207KBUILD_CFLAGS += -fno-asynchronous-unwind-tables 208 209# Never use string load/store instructions as they are 210# often slow when they are implemented at all 211KBUILD_CFLAGS += $(call cc-option,-mno-string) 212 213cpu-as-$(CONFIG_40x) += -Wa,-m405 214cpu-as-$(CONFIG_44x) += -Wa,-m440 215cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec) 216cpu-as-$(CONFIG_E500) += -Wa,-me500 217 218# When using '-many -mpower4' gas will first try and find a matching power4 219# mnemonic and failing that it will allow any valid mnemonic that GAS knows 220# about. GCC will pass -many to GAS when assembling, clang does not. 221cpu-as-$(CONFIG_PPC_BOOK3S_64) += -Wa,-mpower4 -Wa,-many 222cpu-as-$(CONFIG_PPC_E500MC) += $(call as-option,-Wa$(comma)-me500mc) 223 224KBUILD_AFLAGS += $(cpu-as-y) 225KBUILD_CFLAGS += $(cpu-as-y) 226 227KBUILD_AFLAGS += $(aflags-y) 228KBUILD_CFLAGS += $(cflags-y) 229 230head-$(CONFIG_PPC64) := arch/powerpc/kernel/head_64.o 231head-$(CONFIG_PPC_BOOK3S_32) := arch/powerpc/kernel/head_book3s_32.o 232head-$(CONFIG_PPC_8xx) := arch/powerpc/kernel/head_8xx.o 233head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o 234head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o 235head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o 236 237head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o 238head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o 239head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o 240head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o 241 242# Default to zImage, override when needed 243all: zImage 244 245# With make 3.82 we cannot mix normal and wildcard targets 246BOOT_TARGETS1 := zImage zImage.initrd uImage 247BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.% 248 249PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2) 250 251boot := arch/$(ARCH)/boot 252 253$(BOOT_TARGETS1): vmlinux 254 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 255$(BOOT_TARGETS2): vmlinux 256 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 257 258 259PHONY += bootwrapper_install 260bootwrapper_install: 261 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 262 263# Used to create 'merged defconfigs' 264# To use it $(call) it with the first argument as the base defconfig 265# and the second argument as a space separated list of .config files to merge, 266# without the .config suffix. 267define merge_into_defconfig 268 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ 269 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \ 270 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config) 271 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 272endef 273 274PHONY += pseries_le_defconfig 275pseries_le_defconfig: 276 $(call merge_into_defconfig,pseries_defconfig,le) 277 278PHONY += ppc64le_defconfig 279ppc64le_defconfig: 280 $(call merge_into_defconfig,ppc64_defconfig,le) 281 282PHONY += ppc64le_guest_defconfig 283ppc64le_guest_defconfig: 284 $(call merge_into_defconfig,ppc64_defconfig,le guest) 285 286PHONY += ppc64_guest_defconfig 287ppc64_guest_defconfig: 288 $(call merge_into_defconfig,ppc64_defconfig,be guest) 289 290PHONY += powernv_be_defconfig 291powernv_be_defconfig: 292 $(call merge_into_defconfig,powernv_defconfig,be) 293 294PHONY += mpc85xx_defconfig 295mpc85xx_defconfig: 296 $(call merge_into_defconfig,mpc85xx_base.config,\ 297 85xx-32bit 85xx-hw fsl-emb-nonhw) 298 299PHONY += mpc85xx_smp_defconfig 300mpc85xx_smp_defconfig: 301 $(call merge_into_defconfig,mpc85xx_base.config,\ 302 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw) 303 304PHONY += corenet32_smp_defconfig 305corenet32_smp_defconfig: 306 $(call merge_into_defconfig,corenet_base.config,\ 307 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa) 308 309PHONY += corenet64_smp_defconfig 310corenet64_smp_defconfig: 311 $(call merge_into_defconfig,corenet_base.config,\ 312 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa) 313 314PHONY += mpc86xx_defconfig 315mpc86xx_defconfig: 316 $(call merge_into_defconfig,mpc86xx_base.config,\ 317 86xx-hw fsl-emb-nonhw) 318 319PHONY += mpc86xx_smp_defconfig 320mpc86xx_smp_defconfig: 321 $(call merge_into_defconfig,mpc86xx_base.config,\ 322 86xx-smp 86xx-hw fsl-emb-nonhw) 323 324PHONY += ppc32_allmodconfig 325ppc32_allmodconfig: 326 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \ 327 -f $(srctree)/Makefile allmodconfig 328 329PHONY += ppc_defconfig 330ppc_defconfig: 331 $(call merge_into_defconfig,book3s_32.config,) 332 333PHONY += ppc64le_allmodconfig 334ppc64le_allmodconfig: 335 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \ 336 -f $(srctree)/Makefile allmodconfig 337 338PHONY += ppc64le_allnoconfig 339ppc64le_allnoconfig: 340 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/ppc64le.config \ 341 -f $(srctree)/Makefile allnoconfig 342 343PHONY += ppc64_book3e_allmodconfig 344ppc64_book3e_allmodconfig: 345 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \ 346 -f $(srctree)/Makefile allmodconfig 347 348PHONY += ppc32_randconfig 349ppc32_randconfig: 350 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/32-bit.config \ 351 -f $(srctree)/Makefile randconfig 352 353PHONY += ppc64_randconfig 354ppc64_randconfig: 355 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/64-bit.config \ 356 -f $(srctree)/Makefile randconfig 357 358define archhelp 359 @echo '* zImage - Build default images selected by kernel config' 360 @echo ' zImage.* - Compressed kernel image (arch/$(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 $$(INSTALL_PATH) and run lilo' 371 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs' 372 @echo '' 373 @echo ' Targets with <dt> embed a device tree blob inside the image' 374 @echo ' These targets support board with firmware that does not' 375 @echo ' support passing a device tree directly. Replace <dt> with the' 376 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory' 377 @echo ' (minus the .dts extension).' 378endef 379 380PHONY += install 381install: 382 sh -x $(srctree)/$(boot)/install.sh "$(KERNELRELEASE)" vmlinux \ 383 System.map "$(INSTALL_PATH)" 384 385archclean: 386 $(Q)$(MAKE) $(clean)=$(boot) 387 388ifeq ($(KBUILD_EXTMOD),) 389# We need to generate vdso-offsets.h before compiling certain files in kernel/. 390# In order to do that, we should use the archprepare target, but we can't since 391# asm-offsets.h is included in some files used to generate vdso-offsets.h, and 392# asm-offsets.h is built in prepare0, for which archprepare is a dependency. 393# Therefore we need to generate the header after prepare0 has been made, hence 394# this hack. 395prepare: vdso_prepare 396vdso_prepare: prepare0 397 $(if $(CONFIG_VDSO32),$(Q)$(MAKE) \ 398 $(build)=arch/powerpc/kernel/vdso32 include/generated/vdso32-offsets.h) 399 $(if $(CONFIG_PPC64),$(Q)$(MAKE) \ 400 $(build)=arch/powerpc/kernel/vdso64 include/generated/vdso64-offsets.h) 401endif 402 403archprepare: checkbin 404 405archheaders: 406 $(Q)$(MAKE) $(build)=arch/powerpc/kernel/syscalls all 407 408ifdef CONFIG_STACKPROTECTOR 409prepare: stack_protector_prepare 410 411PHONY += stack_protector_prepare 412stack_protector_prepare: prepare0 413ifdef CONFIG_PPC64 414 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' include/generated/asm-offsets.h)) 415else 416 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' include/generated/asm-offsets.h)) 417endif 418endif 419 420ifdef CONFIG_SMP 421ifdef CONFIG_PPC32 422prepare: task_cpu_prepare 423 424PHONY += task_cpu_prepare 425task_cpu_prepare: prepare0 426 $(eval KBUILD_CFLAGS += -D_TASK_CPU=$(shell awk '{if ($$2 == "TASK_CPU") print $$3;}' include/generated/asm-offsets.h)) 427 428endif # CONFIG_PPC32 429endif # CONFIG_SMP 430 431PHONY += checkbin 432checkbin: 433 @if test "x${CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT}" = "xy" -a \ 434 "x${CONFIG_LD_IS_BFD}" = "xy" -a \ 435 "${CONFIG_LD_VERSION}" = "23700" ; then \ 436 echo -n '*** binutils 2.37 drops unused section symbols, which recordmcount ' ; \ 437 echo 'is unable to handle.' ; \ 438 echo '*** Please use a different binutils version.' ; \ 439 false ; \ 440 fi 441