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)$(LDEMULATION) 101endif 102 103cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard=tls 104ifdef CONFIG_PPC64 105cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r13 106else 107cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r2 108endif 109 110LDFLAGS_vmlinux-y := -Bstatic 111LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie 112LDFLAGS_vmlinux-$(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 := $(call cc-option,-msoft-float) 154 155ifdef CONFIG_FUNCTION_TRACER 156ifdef CONFIG_ARCH_USING_PATCHABLE_FUNCTION_ENTRY 157KBUILD_CPPFLAGS += -DCC_USING_PATCHABLE_FUNCTION_ENTRY 158CC_FLAGS_FTRACE := -fpatchable-function-entry=2 159else 160CC_FLAGS_FTRACE := -pg 161ifdef CONFIG_MPROFILE_KERNEL 162CC_FLAGS_FTRACE += -mprofile-kernel 163endif 164endif 165endif 166 167CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += -mcpu=$(CONFIG_TARGET_CPU) 168AFLAGS-$(CONFIG_TARGET_CPU_BOOL) += -mcpu=$(CONFIG_TARGET_CPU) 169 170CFLAGS-y += $(CONFIG_TUNE_CPU) 171 172asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1) 173 174KBUILD_CPPFLAGS += -I $(srctree)/arch/powerpc $(asinstr) 175KBUILD_AFLAGS += $(AFLAGS-y) 176KBUILD_CFLAGS += $(CC_FLAGS_NO_FPU) 177KBUILD_CFLAGS += $(CFLAGS-y) 178CPP = $(CC) -E $(KBUILD_CFLAGS) 179 180CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__ 181ifdef CONFIG_CPU_BIG_ENDIAN 182CHECKFLAGS += -D__BIG_ENDIAN__ 183else 184CHECKFLAGS += -D__LITTLE_ENDIAN__ 185endif 186 187ifdef CONFIG_476FPE_ERR46 188 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \ 189 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds 190endif 191 192# No prefix or pcrel 193ifdef CONFIG_PPC_KERNEL_PREFIXED 194KBUILD_CFLAGS += $(call cc-option,-mprefixed) 195else 196KBUILD_CFLAGS += $(call cc-option,-mno-prefixed) 197endif 198ifdef CONFIG_PPC_KERNEL_PCREL 199KBUILD_CFLAGS += $(call cc-option,-mpcrel) 200else 201KBUILD_CFLAGS += $(call cc-option,-mno-pcrel) 202endif 203 204# No AltiVec or VSX or MMA instructions when building kernel 205KBUILD_CFLAGS += $(call cc-option,-mno-altivec) 206KBUILD_CFLAGS += $(call cc-option,-mno-vsx) 207KBUILD_CFLAGS += $(call cc-option,-mno-mma) 208 209# No SPE instruction when building kernel 210# (We use all available options to help semi-broken compilers) 211KBUILD_CFLAGS += $(call cc-option,-mno-spe) 212KBUILD_CFLAGS += $(call cc-option,-mspe=no) 213 214# Don't emit .eh_frame since we have no use for it 215KBUILD_CFLAGS += -fno-asynchronous-unwind-tables 216 217# Never use string load/store instructions as they are 218# often slow when they are implemented at all 219KBUILD_CFLAGS += $(call cc-option,-mno-string) 220 221KBUILD_AFLAGS += $(aflags-y) 222KBUILD_CFLAGS += $(cflags-y) 223 224# Default to zImage, override when needed 225all: zImage 226 227# With make 3.82 we cannot mix normal and wildcard targets 228BOOT_TARGETS1 := zImage zImage.initrd uImage 229BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.% 230 231PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2) 232 233boot := arch/powerpc/boot 234 235$(BOOT_TARGETS1): vmlinux 236 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 237$(BOOT_TARGETS2): vmlinux 238 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 239 240 241PHONY += bootwrapper_install 242bootwrapper_install: 243 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 244 245include $(srctree)/scripts/Makefile.defconf 246 247generated_configs += ppc64le_defconfig 248ppc64le_defconfig: 249 $(call merge_into_defconfig,ppc64_defconfig,le) 250 251generated_configs += ppc64le_guest_defconfig 252ppc64le_guest_defconfig: 253 $(call merge_into_defconfig,ppc64_defconfig,le guest kvm_guest) 254 255generated_configs += ppc64_guest_defconfig 256ppc64_guest_defconfig: 257 $(call merge_into_defconfig,ppc64_defconfig,be guest kvm_guest) 258 259generated_configs += pseries_le_defconfig 260pseries_le_defconfig: ppc64le_guest_defconfig 261 262generated_configs += pseries_defconfig 263pseries_defconfig: ppc64le_guest_defconfig 264 265generated_configs += powernv_be_defconfig 266powernv_be_defconfig: 267 $(call merge_into_defconfig,powernv_defconfig,be) 268 269generated_configs += mpc85xx_defconfig 270mpc85xx_defconfig: 271 $(call merge_into_defconfig,mpc85xx_base.config,\ 272 85xx-32bit 85xx-hw fsl-emb-nonhw) 273 274generated_configs += mpc85xx_smp_defconfig 275mpc85xx_smp_defconfig: 276 $(call merge_into_defconfig,mpc85xx_base.config,\ 277 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw) 278 279generated_configs += corenet32_smp_defconfig 280corenet32_smp_defconfig: 281 $(call merge_into_defconfig,corenet_base.config,\ 282 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa) 283 284generated_configs += corenet64_smp_defconfig 285corenet64_smp_defconfig: 286 $(call merge_into_defconfig,corenet_base.config,\ 287 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa) 288 289generated_configs += mpc86xx_defconfig 290mpc86xx_defconfig: 291 $(call merge_into_defconfig,mpc86xx_base.config,\ 292 86xx-hw fsl-emb-nonhw) 293 294generated_configs += mpc86xx_smp_defconfig 295mpc86xx_smp_defconfig: 296 $(call merge_into_defconfig,mpc86xx_base.config,\ 297 86xx-smp 86xx-hw fsl-emb-nonhw) 298 299generated_configs += ppc32_allmodconfig 300ppc32_allmodconfig: 301 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \ 302 -f $(srctree)/Makefile allmodconfig 303 304generated_configs += ppc44x_allmodconfig 305ppc44x_allmodconfig: 306 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/44x.config \ 307 -f $(srctree)/Makefile allmodconfig 308 309generated_configs += ppc8xx_allmodconfig 310ppc8xx_allmodconfig: 311 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/8xx.config \ 312 -f $(srctree)/Makefile allmodconfig 313 314generated_configs += ppc85xx_allmodconfig 315ppc85xx_allmodconfig: 316 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-32bit.config \ 317 -f $(srctree)/Makefile allmodconfig 318 319generated_configs += ppc_defconfig 320ppc_defconfig: 321 $(call merge_into_defconfig,book3s_32.config,) 322 323generated_configs += ppc64le_allmodconfig 324ppc64le_allmodconfig: 325 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \ 326 -f $(srctree)/Makefile allmodconfig 327 328generated_configs += ppc64le_allnoconfig 329ppc64le_allnoconfig: 330 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/ppc64le.config \ 331 -f $(srctree)/Makefile allnoconfig 332 333generated_configs += ppc64_book3e_allmodconfig 334ppc64_book3e_allmodconfig: 335 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \ 336 -f $(srctree)/Makefile allmodconfig 337 338generated_configs += ppc32_randconfig 339ppc32_randconfig: 340 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/32-bit.config \ 341 -f $(srctree)/Makefile randconfig 342 343generated_configs += ppc64_randconfig 344ppc64_randconfig: 345 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/64-bit.config \ 346 -f $(srctree)/Makefile randconfig 347 348PHONY += $(generated_configs) 349 350define archhelp 351 echo '* zImage - Build default images selected by kernel config' 352 echo ' zImage.* - Compressed kernel image (arch/powerpc/boot/zImage.*)' 353 echo ' uImage - U-Boot native image format' 354 echo ' cuImage.<dt> - Backwards compatible U-Boot image for older' 355 echo ' versions which do not support device trees' 356 echo ' dtbImage.<dt> - zImage with an embedded device tree blob' 357 echo ' simpleImage.<dt> - Firmware independent image.' 358 echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)' 359 echo ' install - Install kernel using' 360 echo ' (your) ~/bin/$(INSTALLKERNEL) or' 361 echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 362 echo ' install to $$(INSTALL_PATH) and run lilo' 363 echo ' *_defconfig - Select default config from arch/powerpc/configs' 364 echo '' 365 echo ' Targets with <dt> embed a device tree blob inside the image' 366 echo ' These targets support board with firmware that does not' 367 echo ' support passing a device tree directly. Replace <dt> with the' 368 echo ' name of a dts file from the arch/powerpc/boot/dts/ directory' 369 echo ' (minus the .dts extension).' 370 echo 371 $(foreach cfg,$(generated_configs), 372 printf " %-27s - Build for %s\\n" $(cfg) $(subst _defconfig,,$(cfg));) 373endef 374 375PHONY += install 376install: 377 $(call cmd,install) 378 379ifeq ($(KBUILD_EXTMOD),) 380# We need to generate vdso-offsets.h before compiling certain files in kernel/. 381# In order to do that, we should use the archprepare target, but we can't since 382# asm-offsets.h is included in some files used to generate vdso-offsets.h, and 383# asm-offsets.h is built in prepare0, for which archprepare is a dependency. 384# Therefore we need to generate the header after prepare0 has been made, hence 385# this hack. 386prepare: vdso_prepare 387vdso_prepare: prepare0 388 $(if $(CONFIG_VDSO32),$(Q)$(MAKE) \ 389 $(build)=arch/powerpc/kernel/vdso include/generated/vdso32-offsets.h) 390 $(if $(CONFIG_PPC64),$(Q)$(MAKE) \ 391 $(build)=arch/powerpc/kernel/vdso include/generated/vdso64-offsets.h) 392endif 393 394archprepare: checkbin 395 396archheaders: 397 $(Q)$(MAKE) $(build)=arch/powerpc/kernel/syscalls all 398 399ifdef CONFIG_STACKPROTECTOR 400prepare: stack_protector_prepare 401 402PHONY += stack_protector_prepare 403stack_protector_prepare: prepare0 404ifdef CONFIG_PPC64 405 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' include/generated/asm-offsets.h)) 406else 407 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' include/generated/asm-offsets.h)) 408endif 409endif 410 411PHONY += checkbin 412checkbin: 413 @if test "x${CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT}" = "xy" -a \ 414 "x${CONFIG_LD_IS_BFD}" = "xy" -a \ 415 "${CONFIG_LD_VERSION}" = "23700" ; then \ 416 echo -n '*** binutils 2.37 drops unused section symbols, which recordmcount ' ; \ 417 echo 'is unable to handle.' ; \ 418 echo '*** Please use a different binutils version.' ; \ 419 false ; \ 420 fi 421