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