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 13HAS_BIARCH := $(call cc-option-yn, -m32) 14 15# Set default 32 bits cross compilers for vdso and boot wrapper 16CROSS32_COMPILE ?= 17 18# If we're on a ppc/ppc64/ppc64le machine use that defconfig, otherwise just use 19# ppc64_defconfig because we have nothing better to go on. 20uname := $(shell uname -m) 21KBUILD_DEFCONFIG := $(if $(filter ppc%,$(uname)),$(uname),ppc64)_defconfig 22 23new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi) 24 25ifeq ($(new_nm),y) 26NM := $(NM) --synthetic 27endif 28 29# BITS is used as extension for files which are available in a 32 bit 30# and a 64 bit version to simplify shared Makefiles. 31# e.g.: obj-y += foo_$(BITS).o 32export BITS 33 34ifdef CONFIG_PPC64 35 BITS := 64 36else 37 BITS := 32 38endif 39 40machine-y = ppc 41machine-$(CONFIG_PPC64) += 64 42machine-$(CONFIG_CPU_LITTLE_ENDIAN) += le 43UTS_MACHINE := $(subst $(space),,$(machine-y)) 44 45# XXX This needs to be before we override LD below 46ifdef CONFIG_PPC32 47KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o 48else 49ifeq ($(call ld-ifversion, -ge, 22500, y),y) 50# Have the linker provide sfpr if possible. 51# There is a corresponding test in arch/powerpc/lib/Makefile 52KBUILD_LDFLAGS_MODULE += --save-restore-funcs 53else 54KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o 55endif 56endif 57 58ifdef CONFIG_CPU_LITTLE_ENDIAN 59KBUILD_CFLAGS += -mlittle-endian 60KBUILD_LDFLAGS += -EL 61LDEMULATION := lppc 62GNUTARGET := powerpcle 63MULTIPLEWORD := -mno-multiple 64KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect) 65else 66KBUILD_CFLAGS += $(call cc-option,-mbig-endian) 67KBUILD_LDFLAGS += -EB 68LDEMULATION := ppc 69GNUTARGET := powerpc 70MULTIPLEWORD := -mmultiple 71endif 72 73ifdef CONFIG_PPC64 74ifndef CONFIG_CC_IS_CLANG 75cflags-$(CONFIG_PPC64_ELF_ABI_V1) += $(call cc-option,-mabi=elfv1) 76cflags-$(CONFIG_PPC64_ELF_ABI_V1) += $(call cc-option,-mcall-aixdesc) 77aflags-$(CONFIG_PPC64_ELF_ABI_V1) += $(call cc-option,-mabi=elfv1) 78aflags-$(CONFIG_PPC64_ELF_ABI_V2) += -mabi=elfv2 79endif 80endif 81 82ifndef CONFIG_CC_IS_CLANG 83 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align 84endif 85 86cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) 87cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian 88aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) 89aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian 90 91ifeq ($(HAS_BIARCH),y) 92KBUILD_CFLAGS += -m$(BITS) 93KBUILD_AFLAGS += -m$(BITS) -Wl,-a$(BITS) 94KBUILD_LDFLAGS += -m elf$(BITS)$(LDEMULATION) 95endif 96 97cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard=tls 98ifdef CONFIG_PPC64 99cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r13 100else 101cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r2 102endif 103 104LDFLAGS_vmlinux-y := -Bstatic 105LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie 106LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) += -z notext 107LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y) 108 109ifdef CONFIG_PPC64 110ifeq ($(call cc-option-yn,-mcmodel=medium),y) 111 # -mcmodel=medium breaks modules because it uses 32bit offsets from 112 # the TOC pointer to create pointers where possible. Pointers into the 113 # percpu data area are created by this method. 114 # 115 # The kernel module loader relocates the percpu data section from the 116 # original location (starting with 0xd...) to somewhere in the base 117 # kernel percpu data space (starting with 0xc...). We need a full 118 # 64bit relocation for this to work, hence -mcmodel=large. 119 KBUILD_CFLAGS_MODULE += -mcmodel=large 120else 121 export NO_MINIMAL_TOC := -mno-minimal-toc 122endif 123endif 124 125CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no) 126ifndef CONFIG_CC_IS_CLANG 127ifdef CONFIG_PPC64_ELF_ABI_V2 128CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc)) 129AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2) 130else 131CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1) 132CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc) 133AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1) 134endif 135endif 136CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc)) 137CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions) 138 139# Clang unconditionally reserves r2 on ppc32 and does not support the flag 140# https://bugs.llvm.org/show_bug.cgi?id=39555 141CFLAGS-$(CONFIG_PPC32) := $(call cc-option, -ffixed-r2) 142 143# Clang doesn't support -mmultiple / -mno-multiple 144# https://bugs.llvm.org/show_bug.cgi?id=39556 145CFLAGS-$(CONFIG_PPC32) += $(call cc-option, $(MULTIPLEWORD)) 146 147CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata) 148 149ifdef CONFIG_PPC_BOOK3S_64 150ifdef CONFIG_CPU_LITTLE_ENDIAN 151CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8 152CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power9,-mtune=power8) 153else 154CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5)) 155CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mcpu=power5,-mcpu=power4) 156endif 157else ifdef CONFIG_PPC_BOOK3E_64 158CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64 159endif 160 161ifdef CONFIG_FUNCTION_TRACER 162CC_FLAGS_FTRACE := -pg 163ifdef CONFIG_MPROFILE_KERNEL 164CC_FLAGS_FTRACE += -mprofile-kernel 165endif 166endif 167 168CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU)) 169AFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU)) 170 171CFLAGS-$(CONFIG_E5500_CPU) += $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64) 172CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU)) 173 174asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1) 175 176KBUILD_CPPFLAGS += -I $(srctree)/arch/$(ARCH) $(asinstr) 177KBUILD_AFLAGS += $(AFLAGS-y) 178KBUILD_CFLAGS += $(call cc-option,-msoft-float) 179KBUILD_CFLAGS += -pipe $(CFLAGS-y) 180CPP = $(CC) -E $(KBUILD_CFLAGS) 181 182CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__ 183ifdef CONFIG_CPU_BIG_ENDIAN 184CHECKFLAGS += -D__BIG_ENDIAN__ 185else 186CHECKFLAGS += -D__LITTLE_ENDIAN__ 187endif 188 189ifdef CONFIG_476FPE_ERR46 190 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \ 191 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds 192endif 193 194# No AltiVec or VSX instructions when building kernel 195KBUILD_CFLAGS += $(call cc-option,-mno-altivec) 196KBUILD_CFLAGS += $(call cc-option,-mno-vsx) 197 198# No SPE instruction when building kernel 199# (We use all available options to help semi-broken compilers) 200KBUILD_CFLAGS += $(call cc-option,-mno-spe) 201KBUILD_CFLAGS += $(call cc-option,-mspe=no) 202 203# Don't emit .eh_frame since we have no use for it 204KBUILD_CFLAGS += -fno-asynchronous-unwind-tables 205 206# Never use string load/store instructions as they are 207# often slow when they are implemented at all 208KBUILD_CFLAGS += $(call cc-option,-mno-string) 209 210cpu-as-$(CONFIG_40x) += -Wa,-m405 211cpu-as-$(CONFIG_44x) += -Wa,-m440 212cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec) 213cpu-as-$(CONFIG_E500) += -Wa,-me500 214 215# When using '-many -mpower4' gas will first try and find a matching power4 216# mnemonic and failing that it will allow any valid mnemonic that GAS knows 217# about. GCC will pass -many to GAS when assembling, clang does not. 218# LLVM IAS doesn't understand either flag: https://github.com/ClangBuiltLinux/linux/issues/675 219# but LLVM IAS only supports ISA >= 2.06 for Book3S 64 anyway... 220cpu-as-$(CONFIG_PPC_BOOK3S_64) += $(call as-option,-Wa$(comma)-mpower4) $(call as-option,-Wa$(comma)-many) 221cpu-as-$(CONFIG_PPC_E500MC) += $(call as-option,-Wa$(comma)-me500mc) 222 223KBUILD_AFLAGS += $(cpu-as-y) 224KBUILD_CFLAGS += $(cpu-as-y) 225 226KBUILD_AFLAGS += $(aflags-y) 227KBUILD_CFLAGS += $(cflags-y) 228 229head-$(CONFIG_PPC64) := arch/powerpc/kernel/head_64.o 230head-$(CONFIG_PPC_BOOK3S_32) := arch/powerpc/kernel/head_book3s_32.o 231head-$(CONFIG_PPC_8xx) := arch/powerpc/kernel/head_8xx.o 232head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o 233head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o 234head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o 235 236head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o 237head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o 238head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o 239head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o 240 241# Default to zImage, override when needed 242all: zImage 243 244# With make 3.82 we cannot mix normal and wildcard targets 245BOOT_TARGETS1 := zImage zImage.initrd uImage 246BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.% 247 248PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2) 249 250boot := arch/$(ARCH)/boot 251 252$(BOOT_TARGETS1): vmlinux 253 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 254$(BOOT_TARGETS2): vmlinux 255 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 256 257 258PHONY += bootwrapper_install 259bootwrapper_install: 260 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 261 262# Used to create 'merged defconfigs' 263# To use it $(call) it with the first argument as the base defconfig 264# and the second argument as a space separated list of .config files to merge, 265# without the .config suffix. 266define merge_into_defconfig 267 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ 268 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \ 269 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config) 270 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 271endef 272 273PHONY += pseries_le_defconfig 274pseries_le_defconfig: 275 $(call merge_into_defconfig,pseries_defconfig,le) 276 277PHONY += ppc64le_defconfig 278ppc64le_defconfig: 279 $(call merge_into_defconfig,ppc64_defconfig,le) 280 281PHONY += ppc64le_guest_defconfig 282ppc64le_guest_defconfig: 283 $(call merge_into_defconfig,ppc64_defconfig,le guest) 284 285PHONY += ppc64_guest_defconfig 286ppc64_guest_defconfig: 287 $(call merge_into_defconfig,ppc64_defconfig,be guest) 288 289PHONY += powernv_be_defconfig 290powernv_be_defconfig: 291 $(call merge_into_defconfig,powernv_defconfig,be) 292 293PHONY += mpc85xx_defconfig 294mpc85xx_defconfig: 295 $(call merge_into_defconfig,mpc85xx_base.config,\ 296 85xx-32bit 85xx-hw fsl-emb-nonhw) 297 298PHONY += mpc85xx_smp_defconfig 299mpc85xx_smp_defconfig: 300 $(call merge_into_defconfig,mpc85xx_base.config,\ 301 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw) 302 303PHONY += corenet32_smp_defconfig 304corenet32_smp_defconfig: 305 $(call merge_into_defconfig,corenet_base.config,\ 306 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa) 307 308PHONY += corenet64_smp_defconfig 309corenet64_smp_defconfig: 310 $(call merge_into_defconfig,corenet_base.config,\ 311 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa) 312 313PHONY += mpc86xx_defconfig 314mpc86xx_defconfig: 315 $(call merge_into_defconfig,mpc86xx_base.config,\ 316 86xx-hw fsl-emb-nonhw) 317 318PHONY += mpc86xx_smp_defconfig 319mpc86xx_smp_defconfig: 320 $(call merge_into_defconfig,mpc86xx_base.config,\ 321 86xx-smp 86xx-hw fsl-emb-nonhw) 322 323PHONY += ppc32_allmodconfig 324ppc32_allmodconfig: 325 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \ 326 -f $(srctree)/Makefile allmodconfig 327 328PHONY += ppc_defconfig 329ppc_defconfig: 330 $(call merge_into_defconfig,book3s_32.config,) 331 332PHONY += ppc64le_allmodconfig 333ppc64le_allmodconfig: 334 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \ 335 -f $(srctree)/Makefile allmodconfig 336 337PHONY += ppc64le_allnoconfig 338ppc64le_allnoconfig: 339 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/ppc64le.config \ 340 -f $(srctree)/Makefile allnoconfig 341 342PHONY += ppc64_book3e_allmodconfig 343ppc64_book3e_allmodconfig: 344 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \ 345 -f $(srctree)/Makefile allmodconfig 346 347PHONY += ppc32_randconfig 348ppc32_randconfig: 349 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/32-bit.config \ 350 -f $(srctree)/Makefile randconfig 351 352PHONY += ppc64_randconfig 353ppc64_randconfig: 354 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/64-bit.config \ 355 -f $(srctree)/Makefile randconfig 356 357define archhelp 358 @echo '* zImage - Build default images selected by kernel config' 359 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/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 $$(INSTALL_PATH) and run lilo' 370 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs' 371 @echo '' 372 @echo ' Targets with <dt> embed a device tree blob inside the image' 373 @echo ' These targets support board with firmware that does not' 374 @echo ' support passing a device tree directly. Replace <dt> with the' 375 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory' 376 @echo ' (minus the .dts extension).' 377endef 378 379PHONY += install 380install: 381 $(call cmd,install) 382 383ifeq ($(KBUILD_EXTMOD),) 384# We need to generate vdso-offsets.h before compiling certain files in kernel/. 385# In order to do that, we should use the archprepare target, but we can't since 386# asm-offsets.h is included in some files used to generate vdso-offsets.h, and 387# asm-offsets.h is built in prepare0, for which archprepare is a dependency. 388# Therefore we need to generate the header after prepare0 has been made, hence 389# this hack. 390prepare: vdso_prepare 391vdso_prepare: prepare0 392 $(if $(CONFIG_VDSO32),$(Q)$(MAKE) \ 393 $(build)=arch/powerpc/kernel/vdso include/generated/vdso32-offsets.h) 394 $(if $(CONFIG_PPC64),$(Q)$(MAKE) \ 395 $(build)=arch/powerpc/kernel/vdso include/generated/vdso64-offsets.h) 396endif 397 398archprepare: checkbin 399 400archheaders: 401 $(Q)$(MAKE) $(build)=arch/powerpc/kernel/syscalls all 402 403ifdef CONFIG_STACKPROTECTOR 404prepare: stack_protector_prepare 405 406PHONY += stack_protector_prepare 407stack_protector_prepare: prepare0 408ifdef CONFIG_PPC64 409 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' include/generated/asm-offsets.h)) 410else 411 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' include/generated/asm-offsets.h)) 412endif 413endif 414 415PHONY += checkbin 416# Check toolchain versions: 417# - gcc-4.6 is the minimum kernel-wide version so nothing required. 418checkbin: 419 @if test "x${CONFIG_LD_IS_LLD}" != "xy" -a \ 420 "x$(call ld-ifversion, -le, 22400, y)" = "xy" ; then \ 421 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \ 422 echo 'in some circumstances.' ; \ 423 echo '*** binutils 2.23 do not define the TOC symbol ' ; \ 424 echo -n '*** Please use a different binutils version.' ; \ 425 false ; \ 426 fi 427