1# This file is included by the global makefile so that you can add your own 2# architecture-specific flags and dependencies. 3# 4# This file is subject to the terms and conditions of the GNU General Public 5# License. See the file "COPYING" in the main directory of this archive 6# for more details. 7# 8# Copyright (C) 1994 by Linus Torvalds 9# Changes for PPC by Gary Thomas 10# Rewritten by Cort Dougan and Paul Mackerras 11# 12 13ifdef cross_compiling 14 ifeq ($(CROSS_COMPILE),) 15 # Auto detect cross compiler prefix. 16 # Look for: (powerpc(64(le)?)?)(-unknown)?-linux(-gnu)?- 17 CC_ARCHES := powerpc powerpc64 powerpc64le 18 CC_SUFFIXES := linux linux-gnu unknown-linux-gnu 19 CROSS_COMPILE := $(call cc-cross-prefix, $(foreach a,$(CC_ARCHES), \ 20 $(foreach s,$(CC_SUFFIXES),$(a)-$(s)-))) 21 endif 22endif 23 24HAS_BIARCH := $(call cc-option-yn, -m32) 25 26# Set default 32 bits cross compilers for vdso and boot wrapper 27CROSS32_COMPILE ?= 28 29# If we're on a ppc/ppc64/ppc64le machine use that defconfig, otherwise just use 30# ppc64le_defconfig because we have nothing better to go on. 31uname := $(shell uname -m) 32KBUILD_DEFCONFIG := $(if $(filter ppc%,$(uname)),$(uname),ppc64le)_defconfig 33 34new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi) 35 36ifeq ($(new_nm),y) 37NM := $(NM) --synthetic 38endif 39 40# BITS is used as extension for files which are available in a 32 bit 41# and a 64 bit version to simplify shared Makefiles. 42# e.g.: obj-y += foo_$(BITS).o 43export BITS 44 45ifdef CONFIG_PPC64 46 BITS := 64 47else 48 BITS := 32 49endif 50 51machine-y = ppc 52machine-$(CONFIG_PPC64) += 64 53machine-$(CONFIG_CPU_LITTLE_ENDIAN) += le 54UTS_MACHINE := $(subst $(space),,$(machine-y)) 55 56ifeq ($(CONFIG_PPC64)$(CONFIG_LD_IS_BFD),yy) 57# Have the linker provide sfpr if possible. 58# There is a corresponding test in arch/powerpc/lib/Makefile 59KBUILD_LDFLAGS_MODULE += --save-restore-funcs 60else 61KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o 62endif 63 64ifdef CONFIG_CPU_LITTLE_ENDIAN 65KBUILD_CFLAGS += -mlittle-endian 66KBUILD_LDFLAGS += -EL 67LDEMULATION := lppc 68GNUTARGET := powerpcle 69MULTIPLEWORD := -mno-multiple 70KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect) 71else 72KBUILD_CFLAGS += $(call cc-option,-mbig-endian) 73KBUILD_LDFLAGS += -EB 74LDEMULATION := ppc 75GNUTARGET := powerpc 76MULTIPLEWORD := -mmultiple 77endif 78 79ifdef CONFIG_PPC64 80ifndef CONFIG_CC_IS_CLANG 81cflags-$(CONFIG_PPC64_ELF_ABI_V1) += $(call cc-option,-mabi=elfv1) 82cflags-$(CONFIG_PPC64_ELF_ABI_V1) += $(call cc-option,-mcall-aixdesc) 83aflags-$(CONFIG_PPC64_ELF_ABI_V1) += $(call cc-option,-mabi=elfv1) 84aflags-$(CONFIG_PPC64_ELF_ABI_V2) += -mabi=elfv2 85endif 86endif 87 88ifndef CONFIG_CC_IS_CLANG 89 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align 90endif 91 92cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) 93cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian 94aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) 95aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian 96 97ifeq ($(HAS_BIARCH),y) 98KBUILD_CFLAGS += -m$(BITS) 99KBUILD_AFLAGS += -m$(BITS) 100KBUILD_LDFLAGS += -m elf$(BITS)$(LDEMULATION) 101endif 102 103LDFLAGS_vmlinux-y := -Bstatic 104LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie 105LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) += -z notext 106LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y) 107 108ifdef CONFIG_PPC64 109ifndef CONFIG_PPC_KERNEL_PCREL 110 # -mcmodel=medium breaks modules because it uses 32bit offsets from 111 # the TOC pointer to create pointers where possible. Pointers into the 112 # percpu data area are created by this method. 113 # 114 # The kernel module loader relocates the percpu data section from the 115 # original location (starting with 0xd...) to somewhere in the base 116 # kernel percpu data space (starting with 0xc...). We need a full 117 # 64bit relocation for this to work, hence -mcmodel=large. 118 KBUILD_CFLAGS_MODULE += -mcmodel=large 119endif 120endif 121 122CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no) 123ifdef CONFIG_PPC64_ELF_ABI_V2 124CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc)) 125else 126ifndef CONFIG_CC_IS_CLANG 127CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1) 128CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc) 129endif 130endif 131CFLAGS-$(CONFIG_PPC64) += -mcmodel=medium 132CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions) 133CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mlong-double-128) 134 135# Clang unconditionally reserves r2 on ppc32 and does not support the flag 136# https://llvm.org/pr39555 137CFLAGS-$(CONFIG_PPC32) := $(call cc-option, -ffixed-r2) 138 139# Clang doesn't support -mmultiple / -mno-multiple 140# https://llvm.org/pr39556 141CFLAGS-$(CONFIG_PPC32) += $(call cc-option, $(MULTIPLEWORD)) 142 143CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata) 144 145CC_FLAGS_FPU := $(call cc-option,-mhard-float) 146CC_FLAGS_NO_FPU := $(call cc-option,-msoft-float) 147 148ifdef CONFIG_FUNCTION_TRACER 149ifdef CONFIG_ARCH_USING_PATCHABLE_FUNCTION_ENTRY 150KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY 151CC_FLAGS_FTRACE := -fpatchable-function-entry=2 152else 153CC_FLAGS_FTRACE := -pg 154ifdef CONFIG_MPROFILE_KERNEL 155CC_FLAGS_FTRACE += -mprofile-kernel 156endif 157endif 158endif 159 160CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += -mcpu=$(CONFIG_TARGET_CPU) 161AFLAGS-$(CONFIG_TARGET_CPU_BOOL) += -mcpu=$(CONFIG_TARGET_CPU) 162 163CFLAGS-y += $(CONFIG_TUNE_CPU) 164 165asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1) 166 167KBUILD_CPPFLAGS += -I $(srctree)/arch/powerpc $(asinstr) 168KBUILD_AFLAGS += $(AFLAGS-y) 169KBUILD_CFLAGS += $(CC_FLAGS_NO_FPU) 170KBUILD_CFLAGS += $(CFLAGS-y) 171CPP = $(CC) -E $(KBUILD_CFLAGS) 172 173CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__ 174ifdef CONFIG_CPU_BIG_ENDIAN 175CHECKFLAGS += -D__BIG_ENDIAN__ 176else 177CHECKFLAGS += -D__LITTLE_ENDIAN__ 178endif 179 180ifdef CONFIG_476FPE_ERR46 181 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \ 182 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds 183endif 184 185# No prefix or pcrel 186ifdef CONFIG_PPC_KERNEL_PREFIXED 187KBUILD_CFLAGS += $(call cc-option,-mprefixed) 188else 189KBUILD_CFLAGS += $(call cc-option,-mno-prefixed) 190endif 191ifdef CONFIG_PPC_KERNEL_PCREL 192KBUILD_CFLAGS += $(call cc-option,-mpcrel) 193else 194KBUILD_CFLAGS += $(call cc-option,-mno-pcrel) 195endif 196 197# No AltiVec or VSX or MMA instructions when building kernel 198KBUILD_CFLAGS += $(call cc-option,-mno-altivec) 199KBUILD_CFLAGS += $(call cc-option,-mno-vsx) 200KBUILD_CFLAGS += $(call cc-option,-mno-mma) 201 202# No SPE instruction when building kernel 203# (We use all available options to help semi-broken compilers) 204KBUILD_CFLAGS += $(call cc-option,-mno-spe) 205KBUILD_CFLAGS += $(call cc-option,-mspe=no) 206 207# Don't emit .eh_frame since we have no use for it 208KBUILD_CFLAGS += -fno-asynchronous-unwind-tables 209 210# Never use string load/store instructions as they are 211# often slow when they are implemented at all 212KBUILD_CFLAGS += $(call cc-option,-mno-string) 213 214KBUILD_AFLAGS += $(aflags-y) 215KBUILD_CFLAGS += $(cflags-y) 216 217# Default to zImage, override when needed 218all: zImage 219 220# With make 3.82 we cannot mix normal and wildcard targets 221BOOT_TARGETS1 := zImage zImage.initrd uImage 222BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.% 223 224PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2) 225 226boot := arch/powerpc/boot 227 228$(BOOT_TARGETS1): vmlinux 229 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 230$(BOOT_TARGETS2): vmlinux 231 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 232 233 234PHONY += bootwrapper_install 235bootwrapper_install: 236 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 237 238include $(srctree)/scripts/Makefile.defconf 239 240generated_configs += ppc64le_defconfig 241ppc64le_defconfig: 242 $(call merge_into_defconfig,ppc64_defconfig,le) 243 244generated_configs += ppc64le_guest_defconfig 245ppc64le_guest_defconfig: 246 $(call merge_into_defconfig,ppc64_defconfig,le guest kvm_guest) 247 248generated_configs += ppc64_guest_defconfig 249ppc64_guest_defconfig: 250 $(call merge_into_defconfig,ppc64_defconfig,be guest kvm_guest) 251 252generated_configs += pseries_le_defconfig 253pseries_le_defconfig: ppc64le_guest_defconfig 254 255generated_configs += pseries_defconfig 256pseries_defconfig: ppc64le_guest_defconfig 257 258generated_configs += powernv_be_defconfig 259powernv_be_defconfig: 260 $(call merge_into_defconfig,powernv_defconfig,be) 261 262generated_configs += mpc85xx_defconfig 263mpc85xx_defconfig: 264 $(call merge_into_defconfig,mpc85xx_base.config,\ 265 85xx-32bit 85xx-hw fsl-emb-nonhw) 266 267generated_configs += mpc85xx_smp_defconfig 268mpc85xx_smp_defconfig: 269 $(call merge_into_defconfig,mpc85xx_base.config,\ 270 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw) 271 272generated_configs += corenet32_smp_defconfig 273corenet32_smp_defconfig: 274 $(call merge_into_defconfig,corenet_base.config,\ 275 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa) 276 277generated_configs += corenet64_smp_defconfig 278corenet64_smp_defconfig: 279 $(call merge_into_defconfig,corenet_base.config,\ 280 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa) 281 282generated_configs += mpc86xx_defconfig 283mpc86xx_defconfig: 284 $(call merge_into_defconfig,mpc86xx_base.config,\ 285 86xx-hw fsl-emb-nonhw) 286 287generated_configs += mpc86xx_smp_defconfig 288mpc86xx_smp_defconfig: 289 $(call merge_into_defconfig,mpc86xx_base.config,\ 290 86xx-smp 86xx-hw fsl-emb-nonhw) 291 292generated_configs += ppc32_allmodconfig 293ppc32_allmodconfig: 294 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \ 295 -f $(srctree)/Makefile allmodconfig 296 297generated_configs += ppc44x_allmodconfig 298ppc44x_allmodconfig: 299 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/44x.config \ 300 -f $(srctree)/Makefile allmodconfig 301 302generated_configs += ppc8xx_allmodconfig 303ppc8xx_allmodconfig: 304 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/8xx.config \ 305 -f $(srctree)/Makefile allmodconfig 306 307generated_configs += ppc85xx_allmodconfig 308ppc85xx_allmodconfig: 309 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-32bit.config \ 310 -f $(srctree)/Makefile allmodconfig 311 312generated_configs += ppc_defconfig 313ppc_defconfig: 314 $(call merge_into_defconfig,book3s_32.config,) 315 316generated_configs += ppc64le_allmodconfig 317ppc64le_allmodconfig: 318 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \ 319 -f $(srctree)/Makefile allmodconfig 320 321generated_configs += ppc64le_allnoconfig 322ppc64le_allnoconfig: 323 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/ppc64le.config \ 324 -f $(srctree)/Makefile allnoconfig 325 326generated_configs += ppc64_book3e_allmodconfig 327ppc64_book3e_allmodconfig: 328 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \ 329 -f $(srctree)/Makefile allmodconfig 330 331generated_configs += ppc32_randconfig 332ppc32_randconfig: 333 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/32-bit.config \ 334 -f $(srctree)/Makefile randconfig 335 336generated_configs += ppc64_randconfig 337ppc64_randconfig: 338 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/64-bit.config \ 339 -f $(srctree)/Makefile randconfig 340 341PHONY += $(generated_configs) 342 343define archhelp 344 echo '* zImage - Build default images selected by kernel config' 345 echo ' zImage.* - Compressed kernel image (arch/powerpc/boot/zImage.*)' 346 echo ' uImage - U-Boot native image format' 347 echo ' cuImage.<dt> - Backwards compatible U-Boot image for older' 348 echo ' versions which do not support device trees' 349 echo ' dtbImage.<dt> - zImage with an embedded device tree blob' 350 echo ' simpleImage.<dt> - Firmware independent image.' 351 echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)' 352 echo ' install - Install kernel using' 353 echo ' (your) ~/bin/$(INSTALLKERNEL) or' 354 echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 355 echo ' install to $$(INSTALL_PATH)' 356 echo ' *_defconfig - Select default config from arch/powerpc/configs' 357 echo '' 358 echo ' Targets with <dt> embed a device tree blob inside the image' 359 echo ' These targets support board with firmware that does not' 360 echo ' support passing a device tree directly. Replace <dt> with the' 361 echo ' name of a dts file from the arch/powerpc/boot/dts/ directory' 362 echo ' (minus the .dts extension).' 363 echo 364 $(foreach cfg,$(generated_configs), 365 printf " %-27s - Build for %s\\n" $(cfg) $(subst _defconfig,,$(cfg));) 366endef 367 368PHONY += install 369install: 370 $(call cmd,install) 371 372ifeq ($(KBUILD_EXTMOD),) 373# We need to generate vdso-offsets.h before compiling certain files in kernel/. 374# In order to do that, we should use the archprepare target, but we can't since 375# asm-offsets.h is included in some files used to generate vdso-offsets.h, and 376# asm-offsets.h is built in prepare0, for which archprepare is a dependency. 377# Therefore we need to generate the header after prepare0 has been made, hence 378# this hack. 379prepare: vdso_prepare 380vdso_prepare: prepare0 381 $(if $(CONFIG_VDSO32),$(Q)$(MAKE) \ 382 $(build)=arch/powerpc/kernel/vdso include/generated/vdso32-offsets.h) 383 $(if $(CONFIG_PPC64),$(Q)$(MAKE) \ 384 $(build)=arch/powerpc/kernel/vdso include/generated/vdso64-offsets.h) 385endif 386 387archprepare: checkbin 388 389archheaders: 390 $(Q)$(MAKE) $(build)=arch/powerpc/kernel/syscalls all 391 392ifdef CONFIG_STACKPROTECTOR 393prepare: stack_protector_prepare 394 395PHONY += stack_protector_prepare 396stack_protector_prepare: prepare0 397ifdef CONFIG_PPC64 398 $(eval KBUILD_CFLAGS += -mstack-protector-guard=tls -mstack-protector-guard-reg=r13 \ 399 -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' include/generated/asm-offsets.h)) 400else 401 $(eval KBUILD_CFLAGS += -mstack-protector-guard=tls -mstack-protector-guard-reg=r2 \ 402 -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' include/generated/asm-offsets.h)) 403endif 404endif 405 406PHONY += checkbin 407checkbin: 408 @if test "x${CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT}" = "xy" -a \ 409 "x${CONFIG_LD_IS_BFD}" = "xy" -a \ 410 "${CONFIG_LD_VERSION}" = "23700" ; then \ 411 echo -n '*** binutils 2.37 drops unused section symbols, which recordmcount ' ; \ 412 echo 'is unable to handle.' ; \ 413 echo '*** Please use a different binutils version.' ; \ 414 false ; \ 415 fi 416