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 += $(objtree)/arch/powerpc/lib/crtsavres.o 62endif 63 64ifdef CONFIG_PPC64 65KBUILD_RUSTFLAGS += --target=powerpc64le-unknown-linux-gnu 66KBUILD_RUSTFLAGS += -Ctarget-feature=-mma,-vsx,-hard-float,-altivec 67else 68KBUILD_RUSTFLAGS += --target=powerpc-unknown-linux-gnu 69endif 70 71ifdef CONFIG_CPU_LITTLE_ENDIAN 72KBUILD_CPPFLAGS += -mlittle-endian 73KBUILD_LDFLAGS += -EL 74LDEMULATION := lppc 75GNUTARGET := powerpcle 76MULTIPLEWORD := -mno-multiple 77KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect) 78else 79KBUILD_CPPFLAGS += $(call cc-option,-mbig-endian) 80KBUILD_LDFLAGS += -EB 81LDEMULATION := ppc 82GNUTARGET := powerpc 83MULTIPLEWORD := -mmultiple 84endif 85 86ifdef CONFIG_PPC64 87ifndef CONFIG_CC_IS_CLANG 88cflags-$(CONFIG_PPC64_ELF_ABI_V1) += $(call cc-option,-mabi=elfv1) 89cflags-$(CONFIG_PPC64_ELF_ABI_V1) += $(call cc-option,-mcall-aixdesc) 90aflags-$(CONFIG_PPC64_ELF_ABI_V1) += $(call cc-option,-mabi=elfv1) 91aflags-$(CONFIG_PPC64_ELF_ABI_V2) += -mabi=elfv2 92endif 93endif 94 95ifndef CONFIG_CC_IS_CLANG 96 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align 97endif 98 99cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) 100cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian 101aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) 102aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian 103 104ifeq ($(HAS_BIARCH),y) 105KBUILD_CPPFLAGS += -m$(BITS) 106KBUILD_AFLAGS += -m$(BITS) 107KBUILD_LDFLAGS += -m elf$(BITS)$(LDEMULATION) 108endif 109 110LDFLAGS_vmlinux-y := -Bstatic 111LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie --no-dynamic-linker 112LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) += -z notext 113LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y) 114 115ifdef CONFIG_PPC64 116ifndef CONFIG_PPC_KERNEL_PCREL 117 # -mcmodel=medium breaks modules because it uses 32bit offsets from 118 # the TOC pointer to create pointers where possible. Pointers into the 119 # percpu data area are created by this method. 120 # 121 # The kernel module loader relocates the percpu data section from the 122 # original location (starting with 0xd...) to somewhere in the base 123 # kernel percpu data space (starting with 0xc...). We need a full 124 # 64bit relocation for this to work, hence -mcmodel=large. 125 KBUILD_CFLAGS_MODULE += -mcmodel=large 126endif 127endif 128 129CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no) 130ifdef CONFIG_PPC64_ELF_ABI_V2 131CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc)) 132else 133ifndef CONFIG_CC_IS_CLANG 134CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1) 135CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc) 136endif 137endif 138CFLAGS-$(CONFIG_PPC64) += -mcmodel=medium 139CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions) 140CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mlong-double-128) 141 142# Clang unconditionally reserves r2 on ppc32 and does not support the flag 143# https://llvm.org/pr39555 144CFLAGS-$(CONFIG_PPC32) := $(call cc-option, -ffixed-r2) 145 146# Clang doesn't support -mmultiple / -mno-multiple 147# https://llvm.org/pr39556 148CFLAGS-$(CONFIG_PPC32) += $(call cc-option, $(MULTIPLEWORD)) 149 150CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata) 151 152CC_FLAGS_FPU := $(call cc-option,-mhard-float) 153CC_FLAGS_NO_FPU := $(call cc-option,-msoft-float) 154 155ifdef CONFIG_FUNCTION_TRACER 156ifdef CONFIG_ARCH_USING_PATCHABLE_FUNCTION_ENTRY 157KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY 158ifdef CONFIG_PPC_FTRACE_OUT_OF_LINE 159CC_FLAGS_FTRACE := -fpatchable-function-entry=1 160else 161ifdef CONFIG_DYNAMIC_FTRACE_WITH_CALL_OPS # PPC32 only 162CC_FLAGS_FTRACE := -fpatchable-function-entry=3,1 163else 164CC_FLAGS_FTRACE := -fpatchable-function-entry=2 165endif 166endif 167else 168CC_FLAGS_FTRACE := -pg 169ifdef CONFIG_MPROFILE_KERNEL 170CC_FLAGS_FTRACE += -mprofile-kernel 171endif 172endif 173endif 174 175CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += -mcpu=$(CONFIG_TARGET_CPU) 176AFLAGS-$(CONFIG_TARGET_CPU_BOOL) += -mcpu=$(CONFIG_TARGET_CPU) 177 178CFLAGS-y += $(CONFIG_TUNE_CPU) 179 180asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1) 181 182KBUILD_CPPFLAGS += -I $(srctree)/arch/powerpc $(asinstr) 183KBUILD_AFLAGS += $(AFLAGS-y) 184KBUILD_CFLAGS += $(CC_FLAGS_NO_FPU) 185KBUILD_CFLAGS += $(CFLAGS-y) 186 187CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__ 188ifdef CONFIG_CPU_BIG_ENDIAN 189CHECKFLAGS += -D__BIG_ENDIAN__ 190else 191CHECKFLAGS += -D__LITTLE_ENDIAN__ 192endif 193 194ifdef CONFIG_476FPE_ERR46 195 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \ 196 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds 197endif 198 199# No prefix or pcrel 200ifdef CONFIG_PPC_KERNEL_PREFIXED 201KBUILD_CFLAGS += $(call cc-option,-mprefixed) 202else 203KBUILD_CFLAGS += $(call cc-option,-mno-prefixed) 204endif 205ifdef CONFIG_PPC_KERNEL_PCREL 206KBUILD_CFLAGS += $(call cc-option,-mpcrel) 207else 208KBUILD_CFLAGS += $(call cc-option,-mno-pcrel) 209endif 210 211# No AltiVec or VSX or MMA instructions when building kernel 212KBUILD_CFLAGS += $(call cc-option,-mno-altivec) 213KBUILD_CFLAGS += $(call cc-option,-mno-vsx) 214KBUILD_CFLAGS += $(call cc-option,-mno-mma) 215 216# No SPE instruction when building kernel 217# (We use all available options to help semi-broken compilers) 218KBUILD_CFLAGS += $(call cc-option,-mno-spe) 219KBUILD_CFLAGS += $(call cc-option,-mspe=no) 220 221# Don't emit .eh_frame since we have no use for it 222KBUILD_CFLAGS += -fno-asynchronous-unwind-tables 223 224# Never use string load/store instructions as they are 225# often slow when they are implemented at all 226KBUILD_CFLAGS += $(call cc-option,-mno-string) 227 228KBUILD_AFLAGS += $(aflags-y) 229KBUILD_CFLAGS += $(cflags-y) 230 231# Default to zImage, override when needed 232all: zImage 233 234# With make 3.82 we cannot mix normal and wildcard targets 235BOOT_TARGETS1 := zImage zImage.initrd uImage 236BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.% 237 238PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2) 239 240boot := arch/powerpc/boot 241 242$(BOOT_TARGETS1): vmlinux 243 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 244$(BOOT_TARGETS2): vmlinux 245 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 246 247 248PHONY += bootwrapper_install 249bootwrapper_install: 250 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 251 252include $(srctree)/scripts/Makefile.defconf 253 254generated_configs += ppc64le_defconfig 255ppc64le_defconfig: 256 $(call merge_into_defconfig,ppc64_defconfig,le) 257 258generated_configs += ppc64le_guest_defconfig 259ppc64le_guest_defconfig: 260 $(call merge_into_defconfig,ppc64_defconfig,le guest kvm_guest) 261 262generated_configs += ppc64_guest_defconfig 263ppc64_guest_defconfig: 264 $(call merge_into_defconfig,ppc64_defconfig,be guest kvm_guest) 265 266generated_configs += pseries_le_defconfig 267pseries_le_defconfig: ppc64le_guest_defconfig 268 269generated_configs += pseries_defconfig 270pseries_defconfig: ppc64le_guest_defconfig 271 272generated_configs += powernv_be_defconfig 273powernv_be_defconfig: 274 $(call merge_into_defconfig,powernv_defconfig,be) 275 276generated_configs += mpc85xx_defconfig 277mpc85xx_defconfig: 278 $(call merge_into_defconfig,mpc85xx_base.config,\ 279 85xx-32bit 85xx-hw fsl-emb-nonhw) 280 281generated_configs += mpc85xx_smp_defconfig 282mpc85xx_smp_defconfig: 283 $(call merge_into_defconfig,mpc85xx_base.config,\ 284 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw) 285 286generated_configs += corenet32_smp_defconfig 287corenet32_smp_defconfig: 288 $(call merge_into_defconfig,corenet_base.config,\ 289 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa) 290 291generated_configs += corenet64_smp_defconfig 292corenet64_smp_defconfig: 293 $(call merge_into_defconfig,corenet_base.config,\ 294 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa) 295 296generated_configs += mpc86xx_defconfig 297mpc86xx_defconfig: 298 $(call merge_into_defconfig,mpc86xx_base.config,\ 299 86xx-hw fsl-emb-nonhw) 300 301generated_configs += mpc86xx_smp_defconfig 302mpc86xx_smp_defconfig: 303 $(call merge_into_defconfig,mpc86xx_base.config,\ 304 86xx-smp 86xx-hw fsl-emb-nonhw) 305 306generated_configs += ppc32_allmodconfig 307ppc32_allmodconfig: 308 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \ 309 -f $(srctree)/Makefile allmodconfig 310 311generated_configs += ppc44x_allmodconfig 312ppc44x_allmodconfig: 313 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/44x.config \ 314 -f $(srctree)/Makefile allmodconfig 315 316generated_configs += ppc8xx_allmodconfig 317ppc8xx_allmodconfig: 318 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/8xx.config \ 319 -f $(srctree)/Makefile allmodconfig 320 321generated_configs += ppc85xx_allmodconfig 322ppc85xx_allmodconfig: 323 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-32bit.config \ 324 -f $(srctree)/Makefile allmodconfig 325 326generated_configs += ppc_defconfig 327ppc_defconfig: 328 $(call merge_into_defconfig,book3s_32.config,) 329 330generated_configs += ppc64le_allmodconfig 331ppc64le_allmodconfig: 332 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \ 333 -f $(srctree)/Makefile allmodconfig 334 335generated_configs += ppc64le_allnoconfig 336ppc64le_allnoconfig: 337 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/ppc64le.config \ 338 -f $(srctree)/Makefile allnoconfig 339 340generated_configs += ppc64_book3e_allmodconfig 341ppc64_book3e_allmodconfig: 342 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \ 343 -f $(srctree)/Makefile allmodconfig 344 345generated_configs += ppc32_randconfig 346ppc32_randconfig: 347 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/32-bit.config \ 348 -f $(srctree)/Makefile randconfig 349 350generated_configs += ppc64_randconfig 351ppc64_randconfig: 352 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/64-bit.config \ 353 -f $(srctree)/Makefile randconfig 354 355PHONY += $(generated_configs) 356 357define archhelp 358 echo '* zImage - Build default images selected by kernel config' 359 echo ' zImage.* - Compressed kernel image (arch/powerpc/boot/zImage.*)' 360 echo ' uImage - U-Boot native image format' 361 echo ' cuImage.<dt> - Backwards compatible U-Boot image for older' 362 echo ' versions which do not support device trees' 363 echo ' dtbImage.<dt> - zImage with an embedded device tree blob' 364 echo ' simpleImage.<dt> - Firmware independent image.' 365 echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)' 366 echo ' install - Install kernel using' 367 echo ' (your) ~/bin/$(INSTALLKERNEL) or' 368 echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 369 echo ' install to $$(INSTALL_PATH)' 370 echo ' *_defconfig - Select default config from arch/powerpc/configs' 371 echo '' 372 echo ' Targets with <dt> embed a device tree blob inside the image' 373 echo ' These targets support board with firmware that does not' 374 echo ' support passing a device tree directly. Replace <dt> with the' 375 echo ' name of a dts file from the arch/powerpc/boot/dts/ directory' 376 echo ' (minus the .dts extension).' 377 echo 378 $(foreach cfg,$(generated_configs), 379 printf " %-27s - Build for %s\\n" $(cfg) $(subst _defconfig,,$(cfg));) 380endef 381 382PHONY += install 383install: 384 $(call cmd,install) 385 386ifeq ($(KBUILD_EXTMOD),) 387# We need to generate vdso-offsets.h before compiling certain files in kernel/. 388# In order to do that, we should use the archprepare target, but we can't since 389# asm-offsets.h is included in some files used to generate vdso-offsets.h, and 390# asm-offsets.h is built in prepare0, for which archprepare is a dependency. 391# Therefore we need to generate the header after prepare0 has been made, hence 392# this hack. 393prepare: vdso_prepare 394vdso_prepare: prepare0 395 $(if $(CONFIG_VDSO32),$(Q)$(MAKE) \ 396 $(build)=arch/powerpc/kernel/vdso include/generated/vdso32-offsets.h) 397 $(if $(CONFIG_PPC64),$(Q)$(MAKE) \ 398 $(build)=arch/powerpc/kernel/vdso include/generated/vdso64-offsets.h) 399endif 400 401archprepare: checkbin 402 403archheaders: 404 $(Q)$(MAKE) $(build)=arch/powerpc/kernel/syscalls all 405 406ifdef CONFIG_STACKPROTECTOR 407prepare: stack_protector_prepare 408 409PHONY += stack_protector_prepare 410stack_protector_prepare: prepare0 411ifdef CONFIG_PPC64 412 $(eval KBUILD_CFLAGS += -mstack-protector-guard=tls -mstack-protector-guard-reg=r13 \ 413 -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' \ 414 $(objtree)/include/generated/asm-offsets.h)) 415else 416 $(eval KBUILD_CFLAGS += -mstack-protector-guard=tls -mstack-protector-guard-reg=r2 \ 417 -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' \ 418 $(objtree)/include/generated/asm-offsets.h)) 419endif 420endif 421 422PHONY += checkbin 423checkbin: 424 @if test "x${CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT}" = "xy" -a \ 425 "x${CONFIG_LD_IS_BFD}" = "xy" -a \ 426 "${CONFIG_LD_VERSION}" = "23700" ; then \ 427 echo -n '*** binutils 2.37 drops unused section symbols, which recordmcount ' ; \ 428 echo 'is unable to handle.' ; \ 429 echo '*** Please use a different binutils version.' ; \ 430 false ; \ 431 fi 432