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 68ifeq ($(call ld-ifversion, -ge, 22500, 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 += $(call cc-option,-mbig-endian) 86KBUILD_LDFLAGS += -EB 87LDEMULATION := ppc 88GNUTARGET := powerpc 89MULTIPLEWORD := -mmultiple 90endif 91 92ifdef CONFIG_PPC64 93ifndef CONFIG_CC_IS_CLANG 94cflags-$(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 99endif 100 101ifndef CONFIG_CC_IS_CLANG 102 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align 103endif 104 105cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) 106cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian 107aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) 108aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian 109 110ifeq ($(HAS_BIARCH),y) 111KBUILD_CFLAGS += -m$(BITS) 112KBUILD_AFLAGS += -m$(BITS) -Wl,-a$(BITS) 113KBUILD_LDFLAGS += -m elf$(BITS)$(LDEMULATION) 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 := $(LDFLAGS_vmlinux-y) 126 127ifdef CONFIG_PPC64 128ifeq ($(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) := $(call cc-option,-mtraceback=no) 144ifndef CONFIG_CC_IS_CLANG 145ifdef CONFIG_CPU_LITTLE_ENDIAN 146CFLAGS-$(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) += $(call cc-option,-mabi=elfv1) 152endif 153endif 154CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc)) 155CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions) 156 157# Clang unconditionally reserves r2 on ppc32 and does not support the flag 158# https://bugs.llvm.org/show_bug.cgi?id=39555 159CFLAGS-$(CONFIG_PPC32) := $(call cc-option, -ffixed-r2) 160 161# Clang doesn't support -mmultiple / -mno-multiple 162# https://bugs.llvm.org/show_bug.cgi?id=39556 163CFLAGS-$(CONFIG_PPC32) += $(call cc-option, $(MULTIPLEWORD)) 164 165CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata) 166 167ifdef CONFIG_PPC_BOOK3S_64 168ifdef CONFIG_CPU_LITTLE_ENDIAN 169CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8 170CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power9,-mtune=power8) 171else 172CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5)) 173CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mcpu=power5,-mcpu=power4) 174endif 175else 176CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64 177endif 178 179ifdef CONFIG_FUNCTION_TRACER 180CC_FLAGS_FTRACE := -pg 181ifdef CONFIG_MPROFILE_KERNEL 182CC_FLAGS_FTRACE += -mprofile-kernel 183endif 184endif 185 186CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU)) 187 188# Altivec option not allowed with e500mc64 in GCC. 189ifdef CONFIG_ALTIVEC 190E5500_CPU := -mcpu=powerpc64 191else 192E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64) 193endif 194CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU) 195CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU)) 196 197ifdef CONFIG_PPC32 198ifdef CONFIG_PPC_E500MC 199CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc) 200else 201CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc) 202endif 203endif 204 205asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1) 206 207KBUILD_CPPFLAGS += -I $(srctree)/arch/$(ARCH) $(asinstr) 208KBUILD_AFLAGS += $(AFLAGS-y) 209KBUILD_CFLAGS += $(call cc-option,-msoft-float) 210KBUILD_CFLAGS += -pipe $(CFLAGS-y) 211CPP = $(CC) -E $(KBUILD_CFLAGS) 212 213CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__ 214ifdef CONFIG_CPU_BIG_ENDIAN 215CHECKFLAGS += -D__BIG_ENDIAN__ 216else 217CHECKFLAGS += -D__LITTLE_ENDIAN__ 218endif 219 220ifdef CONFIG_476FPE_ERR46 221 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \ 222 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds 223endif 224 225# No AltiVec or VSX instructions when building kernel 226KBUILD_CFLAGS += $(call cc-option,-mno-altivec) 227KBUILD_CFLAGS += $(call cc-option,-mno-vsx) 228 229# No SPE instruction when building kernel 230# (We use all available options to help semi-broken compilers) 231KBUILD_CFLAGS += $(call cc-option,-mno-spe) 232KBUILD_CFLAGS += $(call cc-option,-mspe=no) 233 234# Don't emit .eh_frame since we have no use for it 235KBUILD_CFLAGS += -fno-asynchronous-unwind-tables 236 237# Never use string load/store instructions as they are 238# often slow when they are implemented at all 239KBUILD_CFLAGS += $(call cc-option,-mno-string) 240 241cpu-as-$(CONFIG_40x) += -Wa,-m405 242cpu-as-$(CONFIG_44x) += -Wa,-m440 243cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec) 244cpu-as-$(CONFIG_E500) += -Wa,-me500 245 246# When using '-many -mpower4' gas will first try and find a matching power4 247# mnemonic and failing that it will allow any valid mnemonic that GAS knows 248# about. GCC will pass -many to GAS when assembling, clang does not. 249cpu-as-$(CONFIG_PPC_BOOK3S_64) += -Wa,-mpower4 -Wa,-many 250cpu-as-$(CONFIG_PPC_E500MC) += $(call as-option,-Wa$(comma)-me500mc) 251 252KBUILD_AFLAGS += $(cpu-as-y) 253KBUILD_CFLAGS += $(cpu-as-y) 254 255KBUILD_AFLAGS += $(aflags-y) 256KBUILD_CFLAGS += $(cflags-y) 257 258head-$(CONFIG_PPC64) := arch/powerpc/kernel/head_64.o 259head-$(CONFIG_PPC_BOOK3S_32) := arch/powerpc/kernel/head_book3s_32.o 260head-$(CONFIG_PPC_8xx) := arch/powerpc/kernel/head_8xx.o 261head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o 262head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o 263head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o 264 265head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o 266head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o 267head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o 268head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o 269 270# Default to zImage, override when needed 271all: zImage 272 273# With make 3.82 we cannot mix normal and wildcard targets 274BOOT_TARGETS1 := zImage zImage.initrd uImage 275BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.% 276 277PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2) 278 279boot := arch/$(ARCH)/boot 280 281$(BOOT_TARGETS1): vmlinux 282 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 283$(BOOT_TARGETS2): vmlinux 284 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 285 286 287PHONY += bootwrapper_install 288bootwrapper_install: 289 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 290 291# Used to create 'merged defconfigs' 292# To use it $(call) it with the first argument as the base defconfig 293# and the second argument as a space separated list of .config files to merge, 294# without the .config suffix. 295define merge_into_defconfig 296 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ 297 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \ 298 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config) 299 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 300endef 301 302PHONY += pseries_le_defconfig 303pseries_le_defconfig: 304 $(call merge_into_defconfig,pseries_defconfig,le) 305 306PHONY += ppc64le_defconfig 307ppc64le_defconfig: 308 $(call merge_into_defconfig,ppc64_defconfig,le) 309 310PHONY += ppc64le_guest_defconfig 311ppc64le_guest_defconfig: 312 $(call merge_into_defconfig,ppc64_defconfig,le guest) 313 314PHONY += ppc64_guest_defconfig 315ppc64_guest_defconfig: 316 $(call merge_into_defconfig,ppc64_defconfig,be guest) 317 318PHONY += powernv_be_defconfig 319powernv_be_defconfig: 320 $(call merge_into_defconfig,powernv_defconfig,be) 321 322PHONY += mpc85xx_defconfig 323mpc85xx_defconfig: 324 $(call merge_into_defconfig,mpc85xx_base.config,\ 325 85xx-32bit 85xx-hw fsl-emb-nonhw) 326 327PHONY += mpc85xx_smp_defconfig 328mpc85xx_smp_defconfig: 329 $(call merge_into_defconfig,mpc85xx_base.config,\ 330 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw) 331 332PHONY += corenet32_smp_defconfig 333corenet32_smp_defconfig: 334 $(call merge_into_defconfig,corenet_base.config,\ 335 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa) 336 337PHONY += corenet64_smp_defconfig 338corenet64_smp_defconfig: 339 $(call merge_into_defconfig,corenet_base.config,\ 340 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa) 341 342PHONY += mpc86xx_defconfig 343mpc86xx_defconfig: 344 $(call merge_into_defconfig,mpc86xx_base.config,\ 345 86xx-hw fsl-emb-nonhw) 346 347PHONY += mpc86xx_smp_defconfig 348mpc86xx_smp_defconfig: 349 $(call merge_into_defconfig,mpc86xx_base.config,\ 350 86xx-smp 86xx-hw fsl-emb-nonhw) 351 352PHONY += ppc32_allmodconfig 353ppc32_allmodconfig: 354 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/book3s_32.config \ 355 -f $(srctree)/Makefile allmodconfig 356 357PHONY += ppc_defconfig 358ppc_defconfig: 359 $(call merge_into_defconfig,book3s_32.config,) 360 361PHONY += ppc64le_allmodconfig 362ppc64le_allmodconfig: 363 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/le.config \ 364 -f $(srctree)/Makefile allmodconfig 365 366PHONY += ppc64le_allnoconfig 367ppc64le_allnoconfig: 368 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/ppc64le.config \ 369 -f $(srctree)/Makefile allnoconfig 370 371PHONY += ppc64_book3e_allmodconfig 372ppc64_book3e_allmodconfig: 373 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/85xx-64bit.config \ 374 -f $(srctree)/Makefile allmodconfig 375 376PHONY += ppc32_randconfig 377ppc32_randconfig: 378 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/32-bit.config \ 379 -f $(srctree)/Makefile randconfig 380 381PHONY += ppc64_randconfig 382ppc64_randconfig: 383 $(Q)$(MAKE) KCONFIG_ALLCONFIG=$(srctree)/arch/powerpc/configs/64-bit.config \ 384 -f $(srctree)/Makefile randconfig 385 386define archhelp 387 @echo '* zImage - Build default images selected by kernel config' 388 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)' 389 @echo ' uImage - U-Boot native image format' 390 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older' 391 @echo ' versions which do not support device trees' 392 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob' 393 @echo ' simpleImage.<dt> - Firmware independent image.' 394 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)' 395 @echo ' install - Install kernel using' 396 @echo ' (your) ~/bin/$(INSTALLKERNEL) or' 397 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 398 @echo ' install to $$(INSTALL_PATH) and run lilo' 399 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs' 400 @echo '' 401 @echo ' Targets with <dt> embed a device tree blob inside the image' 402 @echo ' These targets support board with firmware that does not' 403 @echo ' support passing a device tree directly. Replace <dt> with the' 404 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory' 405 @echo ' (minus the .dts extension).' 406endef 407 408PHONY += install 409install: 410 $(Q)$(MAKE) $(build)=$(boot) install 411 412archclean: 413 $(Q)$(MAKE) $(clean)=$(boot) 414 415ifeq ($(KBUILD_EXTMOD),) 416# We need to generate vdso-offsets.h before compiling certain files in kernel/. 417# In order to do that, we should use the archprepare target, but we can't since 418# asm-offsets.h is included in some files used to generate vdso-offsets.h, and 419# asm-offsets.h is built in prepare0, for which archprepare is a dependency. 420# Therefore we need to generate the header after prepare0 has been made, hence 421# this hack. 422prepare: vdso_prepare 423vdso_prepare: prepare0 424 $(if $(CONFIG_VDSO32),$(Q)$(MAKE) \ 425 $(build)=arch/powerpc/kernel/vdso32 include/generated/vdso32-offsets.h) 426 $(if $(CONFIG_PPC64),$(Q)$(MAKE) \ 427 $(build)=arch/powerpc/kernel/vdso64 include/generated/vdso64-offsets.h) 428endif 429 430archprepare: checkbin 431 432archheaders: 433 $(Q)$(MAKE) $(build)=arch/powerpc/kernel/syscalls all 434 435ifdef CONFIG_STACKPROTECTOR 436prepare: stack_protector_prepare 437 438PHONY += stack_protector_prepare 439stack_protector_prepare: prepare0 440ifdef CONFIG_PPC64 441 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "PACA_CANARY") print $$3;}' include/generated/asm-offsets.h)) 442else 443 $(eval KBUILD_CFLAGS += -mstack-protector-guard-offset=$(shell awk '{if ($$2 == "TASK_CANARY") print $$3;}' include/generated/asm-offsets.h)) 444endif 445endif 446 447ifdef CONFIG_SMP 448ifdef CONFIG_PPC32 449prepare: task_cpu_prepare 450 451PHONY += task_cpu_prepare 452task_cpu_prepare: prepare0 453 $(eval KBUILD_CFLAGS += -D_TASK_CPU=$(shell awk '{if ($$2 == "TASK_CPU") print $$3;}' include/generated/asm-offsets.h)) 454 455endif # CONFIG_PPC32 456endif # CONFIG_SMP 457 458PHONY += checkbin 459# Check toolchain versions: 460# - gcc-4.6 is the minimum kernel-wide version so nothing required. 461checkbin: 462 @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \ 463 && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \ 464 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \ 465 echo 'in some circumstances.' ; \ 466 echo -n '*** Please use a different binutils version.' ; \ 467 false ; \ 468 fi 469