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 := $(call cc-option-yn, -m32) 16 17# Set default 32 bits cross compilers for vdso and boot wrapper 18CROSS32_COMPILE ?= 19 20ifeq ($(HAS_BIARCH),y) 21ifeq ($(CROSS32_COMPILE),) 22ifdef CONFIG_PPC32 23# These options will be overridden by any -mcpu option that the CPU 24# or platform code sets later on the command line, but they are needed 25# to set a sane 32-bit cpu target for the 64-bit cross compiler which 26# may default to the wrong ISA. 27KBUILD_CFLAGS += -mcpu=powerpc 28KBUILD_AFLAGS += -mcpu=powerpc 29endif 30endif 31endif 32 33ifdef CONFIG_PPC_BOOK3S_32 34KBUILD_CFLAGS += -mcpu=powerpc 35endif 36 37# If we're on a ppc/ppc64/ppc64le machine use that defconfig, otherwise just use 38# ppc64_defconfig because we have nothing better to go on. 39uname := $(shell uname -m) 40KBUILD_DEFCONFIG := $(if $(filter ppc%,$(uname)),$(uname),ppc64)_defconfig 41 42new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi) 43 44ifeq ($(new_nm),y) 45NM := $(NM) --synthetic 46endif 47 48# BITS is used as extension for files which are available in a 32 bit 49# and a 64 bit version to simplify shared Makefiles. 50# e.g.: obj-y += foo_$(BITS).o 51export BITS 52 53ifdef CONFIG_PPC64 54 BITS := 64 55else 56 BITS := 32 57endif 58 59machine-y = ppc 60machine-$(CONFIG_PPC64) += 64 61machine-$(CONFIG_CPU_LITTLE_ENDIAN) += le 62UTS_MACHINE := $(subst $(space),,$(machine-y)) 63 64# XXX This needs to be before we override LD below 65ifdef CONFIG_PPC32 66KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o 67else 68KBUILD_LDS_MODULE += $(srctree)/arch/powerpc/kernel/module.lds 69ifeq ($(call ld-ifversion, -ge, 225000000, y),y) 70# Have the linker provide sfpr if possible. 71# There is a corresponding test in arch/powerpc/lib/Makefile 72KBUILD_LDFLAGS_MODULE += --save-restore-funcs 73else 74KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o 75endif 76endif 77 78ifdef CONFIG_CPU_LITTLE_ENDIAN 79KBUILD_CFLAGS += -mlittle-endian 80KBUILD_LDFLAGS += -EL 81LDEMULATION := lppc 82GNUTARGET := powerpcle 83MULTIPLEWORD := -mno-multiple 84KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect) 85else 86KBUILD_CFLAGS += $(call cc-option,-mbig-endian) 87KBUILD_LDFLAGS += -EB 88LDEMULATION := ppc 89GNUTARGET := powerpc 90MULTIPLEWORD := -mmultiple 91endif 92 93ifdef CONFIG_PPC64 94cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1) 95cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mcall-aixdesc) 96aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1) 97aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mabi=elfv2 98endif 99 100ifndef CONFIG_CC_IS_CLANG 101 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align 102endif 103 104cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) 105cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian 106aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) 107aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian 108 109ifeq ($(HAS_BIARCH),y) 110KBUILD_CFLAGS += -m$(BITS) 111KBUILD_AFLAGS += -m$(BITS) -Wl,-a$(BITS) 112KBUILD_LDFLAGS += -m elf$(BITS)$(LDEMULATION) 113endif 114 115cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard=tls 116ifdef CONFIG_PPC64 117cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r13 118else 119cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r2 120endif 121 122LDFLAGS_vmlinux-y := -Bstatic 123LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie 124LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y) 125LDFLAGS_vmlinux += $(call ld-option,--orphan-handling=warn) 126 127ifdef CONFIG_PPC64 128ifeq ($(call cc-option-yn,-mcmodel=medium),y) 129 # -mcmodel=medium breaks modules because it uses 32bit offsets from 130 # the TOC pointer to create pointers where possible. Pointers into the 131 # percpu data area are created by this method. 132 # 133 # The kernel module loader relocates the percpu data section from the 134 # original location (starting with 0xd...) to somewhere in the base 135 # kernel percpu data space (starting with 0xc...). We need a full 136 # 64bit relocation for this to work, hence -mcmodel=large. 137 KBUILD_CFLAGS_MODULE += -mcmodel=large 138else 139 export NO_MINIMAL_TOC := -mno-minimal-toc 140endif 141endif 142 143CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no) 144ifdef CONFIG_CPU_LITTLE_ENDIAN 145CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc)) 146AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2) 147else 148CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1) 149CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc) 150AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1) 151endif 152CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc)) 153CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions) 154 155# Clang unconditionally reserves r2 on ppc32 and does not support the flag 156# https://bugs.llvm.org/show_bug.cgi?id=39555 157CFLAGS-$(CONFIG_PPC32) := $(call cc-option, -ffixed-r2) 158 159# Clang doesn't support -mmultiple / -mno-multiple 160# https://bugs.llvm.org/show_bug.cgi?id=39556 161CFLAGS-$(CONFIG_PPC32) += $(call cc-option, $(MULTIPLEWORD)) 162 163CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata) 164 165ifdef CONFIG_PPC_BOOK3S_64 166ifdef CONFIG_CPU_LITTLE_ENDIAN 167CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8 168CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power9,-mtune=power8) 169else 170CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5)) 171CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mcpu=power5,-mcpu=power4) 172endif 173else 174CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64 175endif 176 177ifdef CONFIG_FUNCTION_TRACER 178CC_FLAGS_FTRACE := -pg 179ifdef CONFIG_MPROFILE_KERNEL 180CC_FLAGS_FTRACE += -mprofile-kernel 181endif 182# Work around gcc code-gen bugs with -pg / -fno-omit-frame-pointer in gcc <= 4.8 183# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44199 184# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52828 185ifndef CONFIG_CC_IS_CLANG 186CC_FLAGS_FTRACE += $(call cc-ifversion, -lt, 0409, -mno-sched-epilog) 187endif 188endif 189 190CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU)) 191 192# Altivec option not allowed with e500mc64 in GCC. 193ifdef CONFIG_ALTIVEC 194E5500_CPU := -mcpu=powerpc64 195else 196E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64) 197endif 198CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU) 199CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU)) 200 201ifdef CONFIG_PPC32 202ifdef CONFIG_PPC_E500MC 203CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc) 204else 205CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc) 206endif 207endif 208 209asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1) 210 211KBUILD_CPPFLAGS += -I $(srctree)/arch/$(ARCH) $(asinstr) 212KBUILD_AFLAGS += $(AFLAGS-y) 213KBUILD_CFLAGS += $(call cc-option,-msoft-float) 214KBUILD_CFLAGS += -pipe $(CFLAGS-y) 215CPP = $(CC) -E $(KBUILD_CFLAGS) 216 217CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__ 218ifdef CONFIG_CPU_BIG_ENDIAN 219CHECKFLAGS += -D__BIG_ENDIAN__ 220else 221CHECKFLAGS += -D__LITTLE_ENDIAN__ 222endif 223 224ifdef CONFIG_476FPE_ERR46 225 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \ 226 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds 227endif 228 229# No AltiVec or VSX instructions when building kernel 230KBUILD_CFLAGS += $(call cc-option,-mno-altivec) 231KBUILD_CFLAGS += $(call cc-option,-mno-vsx) 232 233# No SPE instruction when building kernel 234# (We use all available options to help semi-broken compilers) 235KBUILD_CFLAGS += $(call cc-option,-mno-spe) 236KBUILD_CFLAGS += $(call cc-option,-mspe=no) 237 238# FIXME: the module load should be taught about the additional relocs 239# generated by this. 240# revert to pre-gcc-4.4 behaviour of .eh_frame 241KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm) 242 243# Never use string load/store instructions as they are 244# often slow when they are implemented at all 245KBUILD_CFLAGS += $(call cc-option,-mno-string) 246 247cpu-as-$(CONFIG_4xx) += -Wa,-m405 248cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec) 249cpu-as-$(CONFIG_E200) += -Wa,-me200 250cpu-as-$(CONFIG_E500) += -Wa,-me500 251 252# When using '-many -mpower4' gas will first try and find a matching power4 253# mnemonic and failing that it will allow any valid mnemonic that GAS knows 254# about. GCC will pass -many to GAS when assembling, clang does not. 255cpu-as-$(CONFIG_PPC_BOOK3S_64) += -Wa,-mpower4 -Wa,-many 256cpu-as-$(CONFIG_PPC_E500MC) += $(call as-option,-Wa$(comma)-me500mc) 257 258KBUILD_AFLAGS += $(cpu-as-y) 259KBUILD_CFLAGS += $(cpu-as-y) 260 261KBUILD_AFLAGS += $(aflags-y) 262KBUILD_CFLAGS += $(cflags-y) 263 264head-y := arch/powerpc/kernel/head_$(BITS).o 265head-$(CONFIG_PPC_8xx) := arch/powerpc/kernel/head_8xx.o 266head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o 267head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o 268head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o 269 270head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o 271head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o 272head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o 273head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o 274 275# See arch/powerpc/Kbuild for content of core part of the kernel 276core-y += arch/powerpc/ 277 278drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/ 279 280# Default to zImage, override when needed 281all: zImage 282 283# With make 3.82 we cannot mix normal and wildcard targets 284BOOT_TARGETS1 := zImage zImage.initrd uImage 285BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.% 286 287PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2) 288 289boot := arch/$(ARCH)/boot 290 291$(BOOT_TARGETS1): vmlinux 292 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 293$(BOOT_TARGETS2): vmlinux 294 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 295 296 297bootwrapper_install: 298 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 299 300# Used to create 'merged defconfigs' 301# To use it $(call) it with the first argument as the base defconfig 302# and the second argument as a space separated list of .config files to merge, 303# without the .config suffix. 304define merge_into_defconfig 305 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ 306 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \ 307 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config) 308 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 309endef 310 311PHONY += pseries_le_defconfig 312pseries_le_defconfig: 313 $(call merge_into_defconfig,pseries_defconfig,le) 314 315PHONY += ppc64le_defconfig 316ppc64le_defconfig: 317 $(call merge_into_defconfig,ppc64_defconfig,le) 318 319PHONY += ppc64le_guest_defconfig 320ppc64le_guest_defconfig: 321 $(call merge_into_defconfig,ppc64_defconfig,le guest) 322 323PHONY += ppc64_guest_defconfig 324ppc64_guest_defconfig: 325 $(call merge_into_defconfig,ppc64_defconfig,be guest) 326 327PHONY += powernv_be_defconfig 328powernv_be_defconfig: 329 $(call merge_into_defconfig,powernv_defconfig,be) 330 331PHONY += mpc85xx_defconfig 332mpc85xx_defconfig: 333 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\ 334 85xx-32bit 85xx-hw fsl-emb-nonhw) 335 336PHONY += mpc85xx_smp_defconfig 337mpc85xx_smp_defconfig: 338 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\ 339 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw) 340 341PHONY += corenet32_smp_defconfig 342corenet32_smp_defconfig: 343 $(call merge_into_defconfig,corenet_basic_defconfig,\ 344 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa) 345 346PHONY += corenet64_smp_defconfig 347corenet64_smp_defconfig: 348 $(call merge_into_defconfig,corenet_basic_defconfig,\ 349 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa) 350 351PHONY += mpc86xx_defconfig 352mpc86xx_defconfig: 353 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\ 354 86xx-hw fsl-emb-nonhw) 355 356PHONY += mpc86xx_smp_defconfig 357mpc86xx_smp_defconfig: 358 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\ 359 86xx-smp 86xx-hw fsl-emb-nonhw) 360 361PHONY += ppc32_allmodconfig 362ppc32_allmodconfig: 363 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \ 364 -f $(srctree)/Makefile allmodconfig 365 366PHONY += ppc_defconfig 367ppc_defconfig: 368 $(call merge_into_defconfig,book3s_32.config,) 369 370PHONY += ppc64le_allmodconfig 371ppc64le_allmodconfig: 372 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \ 373 -f $(srctree)/Makefile allmodconfig 374 375PHONY += ppc64_book3e_allmodconfig 376ppc64_book3e_allmodconfig: 377 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \ 378 -f $(srctree)/Makefile allmodconfig 379 380define archhelp 381 @echo '* zImage - Build default images selected by kernel config' 382 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)' 383 @echo ' uImage - U-Boot native image format' 384 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older' 385 @echo ' versions which do not support device trees' 386 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob' 387 @echo ' simpleImage.<dt> - Firmware independent image.' 388 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)' 389 @echo ' install - Install kernel using' 390 @echo ' (your) ~/bin/$(INSTALLKERNEL) or' 391 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 392 @echo ' install to $$(INSTALL_PATH) and run lilo' 393 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs' 394 @echo '' 395 @echo ' Targets with <dt> embed a device tree blob inside the image' 396 @echo ' These targets support board with firmware that does not' 397 @echo ' support passing a device tree directly. Replace <dt> with the' 398 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory' 399 @echo ' (minus the .dts extension).' 400endef 401 402install: 403 $(Q)$(MAKE) $(build)=$(boot) install 404 405vdso_install: 406ifdef CONFIG_PPC64 407 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@ 408endif 409ifdef CONFIG_VDSO32 410 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@ 411endif 412 413archclean: 414 $(Q)$(MAKE) $(clean)=$(boot) 415 416archprepare: checkbin 417 418archheaders: 419 $(Q)$(MAKE) $(build)=arch/powerpc/kernel/syscalls all 420 421ifdef CONFIG_STACKPROTECTOR 422prepare: stack_protector_prepare 423 424stack_protector_prepare: prepare0 425ifdef CONFIG_PPC64 426 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' include/generated/asm-offsets.h)) 427else 428 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' include/generated/asm-offsets.h)) 429endif 430endif 431 432ifdef CONFIG_SMP 433prepare: task_cpu_prepare 434 435task_cpu_prepare: prepare0 436 $(eval KBUILD_CFLAGS += -D_TASK_CPU=$(shell awk '{if ($$2 == "TASK_CPU") print $$3;}' include/generated/asm-offsets.h)) 437endif 438 439# Check toolchain versions: 440# - gcc-4.6 is the minimum kernel-wide version so nothing required. 441checkbin: 442 @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \ 443 && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \ 444 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \ 445 echo 'in some circumstances.' ; \ 446 echo -n '*** Please use a different binutils version.' ; \ 447 false ; \ 448 fi 449