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_LDFLAGS_MODULE += -T $(srctree)/arch/powerpc/kernel/module.lds 69ifeq ($(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) 113KBUILD_ARFLAGS += --target=elf$(BITS)-$(GNUTARGET) 114endif 115 116cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard=tls 117ifdef CONFIG_PPC64 118cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r13 119else 120cflags-$(CONFIG_STACKPROTECTOR) += -mstack-protector-guard-reg=r2 121endif 122 123LDFLAGS_vmlinux-y := -Bstatic 124LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie 125LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y) 126LDFLAGS_vmlinux += $(call ld-option,--orphan-handling=warn) 127 128ifdef CONFIG_PPC64 129ifeq ($(call cc-option-yn,-mcmodel=medium),y) 130 # -mcmodel=medium breaks modules because it uses 32bit offsets from 131 # the TOC pointer to create pointers where possible. Pointers into the 132 # percpu data area are created by this method. 133 # 134 # The kernel module loader relocates the percpu data section from the 135 # original location (starting with 0xd...) to somewhere in the base 136 # kernel percpu data space (starting with 0xc...). We need a full 137 # 64bit relocation for this to work, hence -mcmodel=large. 138 KBUILD_CFLAGS_MODULE += -mcmodel=large 139else 140 export NO_MINIMAL_TOC := -mno-minimal-toc 141endif 142endif 143 144CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no) 145ifdef CONFIG_CPU_LITTLE_ENDIAN 146CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc)) 147AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2) 148else 149CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1) 150CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc) 151AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1) 152endif 153CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc)) 154CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions) 155 156# Clang unconditionally reserves r2 on ppc32 and does not support the flag 157# https://bugs.llvm.org/show_bug.cgi?id=39555 158CFLAGS-$(CONFIG_PPC32) := $(call cc-option, -ffixed-r2) 159 160# Clang doesn't support -mmultiple / -mno-multiple 161# https://bugs.llvm.org/show_bug.cgi?id=39556 162CFLAGS-$(CONFIG_PPC32) += $(call cc-option, $(MULTIPLEWORD)) 163 164CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata) 165 166ifdef CONFIG_PPC_BOOK3S_64 167ifdef CONFIG_CPU_LITTLE_ENDIAN 168CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8 169CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power9,-mtune=power8) 170else 171CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5)) 172CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mcpu=power5,-mcpu=power4) 173endif 174else 175CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64 176endif 177 178ifdef CONFIG_FUNCTION_TRACER 179CC_FLAGS_FTRACE := -pg 180ifdef CONFIG_MPROFILE_KERNEL 181CC_FLAGS_FTRACE += -mprofile-kernel 182endif 183# Work around gcc code-gen bugs with -pg / -fno-omit-frame-pointer in gcc <= 4.8 184# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44199 185# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52828 186ifndef CONFIG_CC_IS_CLANG 187CC_FLAGS_FTRACE += $(call cc-ifversion, -lt, 0409, -mno-sched-epilog) 188endif 189endif 190 191CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU)) 192 193# Altivec option not allowed with e500mc64 in GCC. 194ifdef CONFIG_ALTIVEC 195E5500_CPU := -mcpu=powerpc64 196else 197E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64) 198endif 199CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU) 200CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU)) 201 202ifdef CONFIG_PPC32 203ifdef CONFIG_PPC_E500MC 204CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc) 205else 206CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc) 207endif 208endif 209 210asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1) 211 212KBUILD_CPPFLAGS += -I $(srctree)/arch/$(ARCH) $(asinstr) 213KBUILD_AFLAGS += $(AFLAGS-y) 214KBUILD_CFLAGS += $(call cc-option,-msoft-float) 215KBUILD_CFLAGS += -pipe $(CFLAGS-y) 216CPP = $(CC) -E $(KBUILD_CFLAGS) 217 218CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__ 219ifdef CONFIG_CPU_BIG_ENDIAN 220CHECKFLAGS += -D__BIG_ENDIAN__ 221else 222CHECKFLAGS += -D__LITTLE_ENDIAN__ 223endif 224 225ifdef CONFIG_476FPE_ERR46 226 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \ 227 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds 228endif 229 230# No AltiVec or VSX instructions when building kernel 231KBUILD_CFLAGS += $(call cc-option,-mno-altivec) 232KBUILD_CFLAGS += $(call cc-option,-mno-vsx) 233 234# No SPE instruction when building kernel 235# (We use all available options to help semi-broken compilers) 236KBUILD_CFLAGS += $(call cc-option,-mno-spe) 237KBUILD_CFLAGS += $(call cc-option,-mspe=no) 238 239# FIXME: the module load should be taught about the additional relocs 240# generated by this. 241# revert to pre-gcc-4.4 behaviour of .eh_frame 242KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm) 243 244# Never use string load/store instructions as they are 245# often slow when they are implemented at all 246KBUILD_CFLAGS += $(call cc-option,-mno-string) 247 248cpu-as-$(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 += ppc64le_guest_defconfig 321ppc64le_guest_defconfig: 322 $(call merge_into_defconfig,ppc64_defconfig,le guest) 323 324PHONY += ppc64_guest_defconfig 325ppc64_guest_defconfig: 326 $(call merge_into_defconfig,ppc64_defconfig,be guest) 327 328PHONY += powernv_be_defconfig 329powernv_be_defconfig: 330 $(call merge_into_defconfig,powernv_defconfig,be) 331 332PHONY += mpc85xx_defconfig 333mpc85xx_defconfig: 334 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\ 335 85xx-32bit 85xx-hw fsl-emb-nonhw) 336 337PHONY += mpc85xx_smp_defconfig 338mpc85xx_smp_defconfig: 339 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\ 340 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw) 341 342PHONY += corenet32_smp_defconfig 343corenet32_smp_defconfig: 344 $(call merge_into_defconfig,corenet_basic_defconfig,\ 345 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa) 346 347PHONY += corenet64_smp_defconfig 348corenet64_smp_defconfig: 349 $(call merge_into_defconfig,corenet_basic_defconfig,\ 350 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa) 351 352PHONY += mpc86xx_defconfig 353mpc86xx_defconfig: 354 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\ 355 86xx-hw fsl-emb-nonhw) 356 357PHONY += mpc86xx_smp_defconfig 358mpc86xx_smp_defconfig: 359 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\ 360 86xx-smp 86xx-hw fsl-emb-nonhw) 361 362PHONY += ppc32_allmodconfig 363ppc32_allmodconfig: 364 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \ 365 -f $(srctree)/Makefile allmodconfig 366 367PHONY += ppc_defconfig 368ppc_defconfig: 369 $(call merge_into_defconfig,book3s_32.config,) 370 371PHONY += ppc64le_allmodconfig 372ppc64le_allmodconfig: 373 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \ 374 -f $(srctree)/Makefile allmodconfig 375 376PHONY += ppc64_book3e_allmodconfig 377ppc64_book3e_allmodconfig: 378 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \ 379 -f $(srctree)/Makefile allmodconfig 380 381define archhelp 382 @echo '* zImage - Build default images selected by kernel config' 383 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)' 384 @echo ' uImage - U-Boot native image format' 385 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older' 386 @echo ' versions which do not support device trees' 387 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob' 388 @echo ' simpleImage.<dt> - Firmware independent image.' 389 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)' 390 @echo ' install - Install kernel using' 391 @echo ' (your) ~/bin/$(INSTALLKERNEL) or' 392 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 393 @echo ' install to $$(INSTALL_PATH) and run lilo' 394 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs' 395 @echo '' 396 @echo ' Targets with <dt> embed a device tree blob inside the image' 397 @echo ' These targets support board with firmware that does not' 398 @echo ' support passing a device tree directly. Replace <dt> with the' 399 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory' 400 @echo ' (minus the .dts extension).' 401endef 402 403install: 404 $(Q)$(MAKE) $(build)=$(boot) install 405 406vdso_install: 407ifdef CONFIG_PPC64 408 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@ 409endif 410ifdef CONFIG_VDSO32 411 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@ 412endif 413 414archclean: 415 $(Q)$(MAKE) $(clean)=$(boot) 416 417archprepare: checkbin 418 419archheaders: 420 $(Q)$(MAKE) $(build)=arch/powerpc/kernel/syscalls all 421 422ifdef CONFIG_STACKPROTECTOR 423prepare: stack_protector_prepare 424 425stack_protector_prepare: prepare0 426ifdef CONFIG_PPC64 427 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' include/generated/asm-offsets.h)) 428else 429 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' include/generated/asm-offsets.h)) 430endif 431endif 432 433ifdef CONFIG_SMP 434prepare: task_cpu_prepare 435 436task_cpu_prepare: prepare0 437 $(eval KBUILD_CFLAGS += -D_TASK_CPU=$(shell awk '{if ($$2 == "TASK_CPU") print $$3;}' include/generated/asm-offsets.h)) 438endif 439 440# Check toolchain versions: 441# - gcc-4.6 is the minimum kernel-wide version so nothing required. 442checkbin: 443 @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \ 444 && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \ 445 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \ 446 echo 'in some circumstances.' ; \ 447 echo -n '*** Please use a different binutils version.' ; \ 448 false ; \ 449 fi 450