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 ($(CROSS32_COMPILE),) 22ifdef CONFIG_PPC32 23# These options will be overridden by any -mcpu option that the CPU 24# or platform code sets later on the command line, but they are needed 25# to set a sane 32-bit cpu target for the 64-bit cross compiler which 26# may default to the wrong ISA. 27KBUILD_CFLAGS += -mcpu=powerpc 28KBUILD_AFLAGS += -mcpu=powerpc 29endif 30endif 31endif 32 33ifeq ($(CROSS_COMPILE),) 34KBUILD_DEFCONFIG := $(shell uname -m)_defconfig 35else 36KBUILD_DEFCONFIG := ppc64_defconfig 37endif 38 39ifdef CONFIG_PPC64 40new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi) 41 42ifeq ($(new_nm),y) 43NM := $(NM) --synthetic 44endif 45endif 46 47# BITS is used as extension for files which are available in a 32 bit 48# and a 64 bit version to simplify shared Makefiles. 49# e.g.: obj-y += foo_$(BITS).o 50export BITS 51 52ifdef CONFIG_PPC64 53 BITS := 64 54else 55 BITS := 32 56endif 57 58machine-y = ppc 59machine-$(CONFIG_PPC64) += 64 60machine-$(CONFIG_CPU_LITTLE_ENDIAN) += le 61UTS_MACHINE := $(subst $(space),,$(machine-y)) 62 63# XXX This needs to be before we override LD below 64ifdef CONFIG_PPC32 65KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o 66else 67KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/powerpc/kernel/module.lds 68ifeq ($(call ld-ifversion, -ge, 225000000, y),y) 69# Have the linker provide sfpr if possible. 70# There is a corresponding test in arch/powerpc/lib/Makefile 71KBUILD_LDFLAGS_MODULE += --save-restore-funcs 72else 73KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o 74endif 75endif 76 77ifdef CONFIG_CPU_LITTLE_ENDIAN 78KBUILD_CFLAGS += -mlittle-endian 79KBUILD_LDFLAGS += -EL 80LDEMULATION := lppc 81GNUTARGET := powerpcle 82MULTIPLEWORD := -mno-multiple 83KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect) 84else 85KBUILD_CFLAGS += $(call cc-option,-mbig-endian) 86KBUILD_LDFLAGS += -EB 87LDEMULATION := ppc 88GNUTARGET := powerpc 89MULTIPLEWORD := -mmultiple 90endif 91 92ifdef CONFIG_PPC64 93cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1) 94cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mcall-aixdesc) 95aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1) 96aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mabi=elfv2 97endif 98 99ifndef CONFIG_CC_IS_CLANG 100 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align 101endif 102 103cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) 104cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian 105aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) 106aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian 107 108ifeq ($(HAS_BIARCH),y) 109KBUILD_CFLAGS += -m$(BITS) 110KBUILD_AFLAGS += -m$(BITS) -Wl,-a$(BITS) 111KBUILD_LDFLAGS += -m elf$(BITS)$(LDEMULATION) 112KBUILD_ARFLAGS += --target=elf$(BITS)-$(GNUTARGET) 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) += $(call cc-option,-mno-pointers-to-nested-functions) 154 155CFLAGS-$(CONFIG_PPC32) := -ffixed-r2 $(MULTIPLEWORD) 156CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata) 157 158ifdef CONFIG_PPC_BOOK3S_64 159ifdef CONFIG_CPU_LITTLE_ENDIAN 160CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8 161CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power9,-mtune=power8) 162else 163CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5)) 164CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mcpu=power5,-mcpu=power4) 165endif 166else 167CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64 168endif 169 170ifdef CONFIG_FUNCTION_TRACER 171CC_FLAGS_FTRACE := -pg 172ifdef CONFIG_MPROFILE_KERNEL 173CC_FLAGS_FTRACE += -mprofile-kernel 174endif 175# Work around gcc code-gen bugs with -pg / -fno-omit-frame-pointer in gcc <= 4.8 176# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44199 177# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52828 178ifndef CONFIG_CC_IS_CLANG 179CC_FLAGS_FTRACE += $(call cc-ifversion, -lt, 0409, -mno-sched-epilog) 180endif 181endif 182 183CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU)) 184 185# Altivec option not allowed with e500mc64 in GCC. 186ifdef CONFIG_ALTIVEC 187E5500_CPU := -mcpu=powerpc64 188else 189E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64) 190endif 191CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU) 192CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU)) 193 194ifdef CONFIG_PPC32 195ifdef CONFIG_PPC_E500MC 196CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc) 197else 198CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc) 199endif 200endif 201 202asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1) 203 204KBUILD_CPPFLAGS += -Iarch/$(ARCH) $(asinstr) 205KBUILD_AFLAGS += -Iarch/$(ARCH) $(AFLAGS-y) 206KBUILD_CFLAGS += $(call cc-option,-msoft-float) 207KBUILD_CFLAGS += -pipe -Iarch/$(ARCH) $(CFLAGS-y) 208CPP = $(CC) -E $(KBUILD_CFLAGS) 209 210CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__ 211ifdef CONFIG_CPU_BIG_ENDIAN 212CHECKFLAGS += -D__BIG_ENDIAN__ 213else 214CHECKFLAGS += -D__LITTLE_ENDIAN__ 215endif 216 217ifdef CONFIG_476FPE_ERR46 218 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \ 219 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds 220endif 221 222# No AltiVec or VSX instructions when building kernel 223KBUILD_CFLAGS += $(call cc-option,-mno-altivec) 224KBUILD_CFLAGS += $(call cc-option,-mno-vsx) 225 226# No SPE instruction when building kernel 227# (We use all available options to help semi-broken compilers) 228KBUILD_CFLAGS += $(call cc-option,-mno-spe) 229KBUILD_CFLAGS += $(call cc-option,-mspe=no) 230 231# Enable unit-at-a-time mode when possible. It shrinks the 232# kernel considerably. 233KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time) 234 235# FIXME: the module load should be taught about the additional relocs 236# generated by this. 237# revert to pre-gcc-4.4 behaviour of .eh_frame 238KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm) 239 240# Never use string load/store instructions as they are 241# often slow when they are implemented at all 242KBUILD_CFLAGS += $(call cc-option,-mno-string) 243 244ifdef CONFIG_6xx 245KBUILD_CFLAGS += -mcpu=powerpc 246endif 247 248cpu-as-$(CONFIG_4xx) += -Wa,-m405 249cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec) 250cpu-as-$(CONFIG_E200) += -Wa,-me200 251cpu-as-$(CONFIG_E500) += -Wa,-me500 252 253# When using '-many -mpower4' gas will first try and find a matching power4 254# mnemonic and failing that it will allow any valid mnemonic that GAS knows 255# about. GCC will pass -many to GAS when assembling, clang does not. 256cpu-as-$(CONFIG_PPC_BOOK3S_64) += -Wa,-mpower4 -Wa,-many 257cpu-as-$(CONFIG_PPC_E500MC) += $(call as-option,-Wa$(comma)-me500mc) 258 259KBUILD_AFLAGS += $(cpu-as-y) 260KBUILD_CFLAGS += $(cpu-as-y) 261 262KBUILD_AFLAGS += $(aflags-y) 263KBUILD_CFLAGS += $(cflags-y) 264 265head-y := arch/powerpc/kernel/head_$(BITS).o 266head-$(CONFIG_PPC_8xx) := arch/powerpc/kernel/head_8xx.o 267head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o 268head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o 269head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o 270 271head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o 272head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o 273head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o 274head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o 275 276# See arch/powerpc/Kbuild for content of core part of the kernel 277core-y += arch/powerpc/ 278 279drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/ 280 281# Default to zImage, override when needed 282all: zImage 283 284# With make 3.82 we cannot mix normal and wildcard targets 285BOOT_TARGETS1 := zImage zImage.initrd uImage 286BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.% 287 288PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2) 289 290boot := arch/$(ARCH)/boot 291 292$(BOOT_TARGETS1): vmlinux 293 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 294$(BOOT_TARGETS2): vmlinux 295 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 296 297 298bootwrapper_install: 299 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 300 301# Used to create 'merged defconfigs' 302# To use it $(call) it with the first argument as the base defconfig 303# and the second argument as a space separated list of .config files to merge, 304# without the .config suffix. 305define merge_into_defconfig 306 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ 307 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \ 308 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config) 309 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 310endef 311 312PHONY += pseries_le_defconfig 313pseries_le_defconfig: 314 $(call merge_into_defconfig,pseries_defconfig,le) 315 316PHONY += ppc64le_defconfig 317ppc64le_defconfig: 318 $(call merge_into_defconfig,ppc64_defconfig,le) 319 320PHONY += powernv_be_defconfig 321powernv_be_defconfig: 322 $(call merge_into_defconfig,powernv_defconfig,be) 323 324PHONY += mpc85xx_defconfig 325mpc85xx_defconfig: 326 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\ 327 85xx-32bit 85xx-hw fsl-emb-nonhw) 328 329PHONY += mpc85xx_smp_defconfig 330mpc85xx_smp_defconfig: 331 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\ 332 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw) 333 334PHONY += corenet32_smp_defconfig 335corenet32_smp_defconfig: 336 $(call merge_into_defconfig,corenet_basic_defconfig,\ 337 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa) 338 339PHONY += corenet64_smp_defconfig 340corenet64_smp_defconfig: 341 $(call merge_into_defconfig,corenet_basic_defconfig,\ 342 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa) 343 344PHONY += mpc86xx_defconfig 345mpc86xx_defconfig: 346 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\ 347 86xx-hw fsl-emb-nonhw) 348 349PHONY += mpc86xx_smp_defconfig 350mpc86xx_smp_defconfig: 351 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\ 352 86xx-smp 86xx-hw fsl-emb-nonhw) 353 354PHONY += ppc32_allmodconfig 355ppc32_allmodconfig: 356 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \ 357 -f $(srctree)/Makefile allmodconfig 358 359PHONY += ppc64le_allmodconfig 360ppc64le_allmodconfig: 361 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \ 362 -f $(srctree)/Makefile allmodconfig 363 364PHONY += ppc64_book3e_allmodconfig 365ppc64_book3e_allmodconfig: 366 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \ 367 -f $(srctree)/Makefile allmodconfig 368 369define archhelp 370 @echo '* zImage - Build default images selected by kernel config' 371 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)' 372 @echo ' uImage - U-Boot native image format' 373 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older' 374 @echo ' versions which do not support device trees' 375 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob' 376 @echo ' simpleImage.<dt> - Firmware independent image.' 377 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)' 378 @echo ' install - Install kernel using' 379 @echo ' (your) ~/bin/$(INSTALLKERNEL) or' 380 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 381 @echo ' install to $$(INSTALL_PATH) and run lilo' 382 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs' 383 @echo '' 384 @echo ' Targets with <dt> embed a device tree blob inside the image' 385 @echo ' These targets support board with firmware that does not' 386 @echo ' support passing a device tree directly. Replace <dt> with the' 387 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory' 388 @echo ' (minus the .dts extension).' 389endef 390 391install: 392 $(Q)$(MAKE) $(build)=$(boot) install 393 394vdso_install: 395ifdef CONFIG_PPC64 396 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@ 397endif 398 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@ 399 400archclean: 401 $(Q)$(MAKE) $(clean)=$(boot) 402 403archprepare: checkbin 404 405ifdef CONFIG_STACKPROTECTOR 406prepare: stack_protector_prepare 407 408stack_protector_prepare: prepare0 409ifdef CONFIG_PPC64 410 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' include/generated/asm-offsets.h)) 411else 412 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' include/generated/asm-offsets.h)) 413endif 414endif 415 416# Check toolchain versions: 417# - gcc-4.6 is the minimum kernel-wide version so nothing required. 418checkbin: 419 @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \ 420 && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \ 421 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \ 422 echo 'in some circumstances.' ; \ 423 echo -n '*** Please use a different binutils version.' ; \ 424 false ; \ 425 fi 426