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 20CROSS32CC := $(CROSS32_COMPILE)gcc 21CROSS32AR := $(CROSS32_COMPILE)ar 22 23ifeq ($(HAS_BIARCH),y) 24ifeq ($(CROSS32_COMPILE),) 25CROSS32CC := $(CC) -m32 26KBUILD_ARFLAGS += --target=elf32-powerpc 27endif 28endif 29 30export CROSS32CC CROSS32AR 31 32ifeq ($(CROSS_COMPILE),) 33KBUILD_DEFCONFIG := $(shell uname -m)_defconfig 34else 35KBUILD_DEFCONFIG := ppc64_defconfig 36endif 37 38ifeq ($(CONFIG_PPC64),y) 39new_nm := $(shell if $(NM) --help 2>&1 | grep -- '--synthetic' > /dev/null; then echo y; else echo n; fi) 40 41ifeq ($(new_nm),y) 42NM := $(NM) --synthetic 43endif 44endif 45 46# BITS is used as extension for files which are available in a 32 bit 47# and a 64 bit version to simplify shared Makefiles. 48# e.g.: obj-y += foo_$(BITS).o 49export BITS 50 51ifdef CONFIG_PPC64 52 BITS := 64 53else 54 BITS := 32 55endif 56 57machine-y = ppc 58machine-$(CONFIG_PPC64) += 64 59machine-$(CONFIG_CPU_LITTLE_ENDIAN) += le 60UTS_MACHINE := $(subst $(space),,$(machine-y)) 61 62# XXX This needs to be before we override LD below 63ifdef CONFIG_PPC32 64KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o 65else 66KBUILD_LDFLAGS_MODULE += -T $(srctree)/arch/powerpc/kernel/module.lds 67ifeq ($(call ld-ifversion, -ge, 225000000, y),y) 68# Have the linker provide sfpr if possible. 69# There is a corresponding test in arch/powerpc/lib/Makefile 70KBUILD_LDFLAGS_MODULE += --save-restore-funcs 71else 72KBUILD_LDFLAGS_MODULE += arch/powerpc/lib/crtsavres.o 73endif 74endif 75 76ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y) 77override LD += -EL 78LDEMULATION := lppc 79GNUTARGET := powerpcle 80MULTIPLEWORD := -mno-multiple 81KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect) 82else 83override LD += -EB 84LDEMULATION := ppc 85GNUTARGET := powerpc 86MULTIPLEWORD := -mmultiple 87endif 88 89ifdef CONFIG_PPC64 90cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1) 91cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mcall-aixdesc) 92aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1) 93aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mabi=elfv2 94endif 95 96cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian 97cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) 98ifneq ($(cc-name),clang) 99 cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align 100endif 101 102aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian) 103aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian 104 105ifeq ($(HAS_BIARCH),y) 106override AS += -a$(BITS) 107override LD += -m elf$(BITS)$(LDEMULATION) 108override CC += -m$(BITS) 109KBUILD_ARFLAGS += --target=elf$(BITS)-$(GNUTARGET) 110endif 111 112LDFLAGS_vmlinux-y := -Bstatic 113LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie 114LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y) 115LDFLAGS_vmlinux += $(call ld-option,--orphan-handling=warn) 116 117ifeq ($(CONFIG_PPC64),y) 118ifeq ($(call cc-option-yn,-mcmodel=medium),y) 119 # -mcmodel=medium breaks modules because it uses 32bit offsets from 120 # the TOC pointer to create pointers where possible. Pointers into the 121 # percpu data area are created by this method. 122 # 123 # The kernel module loader relocates the percpu data section from the 124 # original location (starting with 0xd...) to somewhere in the base 125 # kernel percpu data space (starting with 0xc...). We need a full 126 # 64bit relocation for this to work, hence -mcmodel=large. 127 KBUILD_CFLAGS_MODULE += -mcmodel=large 128else 129 export NO_MINIMAL_TOC := -mno-minimal-toc 130endif 131endif 132 133CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no) 134ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y) 135CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc)) 136AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2) 137else 138CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1) 139CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc) 140AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1) 141endif 142CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc)) 143CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions) 144 145CFLAGS-$(CONFIG_PPC32) := -ffixed-r2 $(MULTIPLEWORD) 146CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata) 147 148ifeq ($(CONFIG_PPC_BOOK3S_64),y) 149ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y) 150CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8 151CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power9,-mtune=power8) 152else 153CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5)) 154CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mcpu=power5,-mcpu=power4) 155endif 156else 157CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64 158endif 159 160ifdef CONFIG_MPROFILE_KERNEL 161 ifeq ($(shell $(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -I$(srctree)/include -D__KERNEL__),OK) 162 CC_FLAGS_FTRACE := -pg -mprofile-kernel 163 KBUILD_CPPFLAGS += -DCC_USING_MPROFILE_KERNEL 164 else 165 # If the user asked for mprofile-kernel but the toolchain doesn't 166 # support it, emit a warning and deliberately break the build later 167 # with mprofile-kernel-not-supported. We would prefer to make this an 168 # error right here, but then the user would never be able to run 169 # oldconfig to change their configuration. 170 $(warning Compiler does not support mprofile-kernel, set CONFIG_DISABLE_MPROFILE_KERNEL) 171 CC_FLAGS_FTRACE := -mprofile-kernel-not-supported 172 endif 173endif 174 175CFLAGS-$(CONFIG_CELL_CPU) += $(call cc-option,-mcpu=cell) 176CFLAGS-$(CONFIG_POWER5_CPU) += $(call cc-option,-mcpu=power5) 177CFLAGS-$(CONFIG_POWER6_CPU) += $(call cc-option,-mcpu=power6) 178CFLAGS-$(CONFIG_POWER7_CPU) += $(call cc-option,-mcpu=power7) 179CFLAGS-$(CONFIG_POWER8_CPU) += $(call cc-option,-mcpu=power8) 180CFLAGS-$(CONFIG_POWER9_CPU) += $(call cc-option,-mcpu=power9) 181 182# Altivec option not allowed with e500mc64 in GCC. 183ifeq ($(CONFIG_ALTIVEC),y) 184E5500_CPU := -mcpu=powerpc64 185else 186E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64) 187endif 188CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU) 189CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU)) 190 191ifeq ($(CONFIG_PPC32),y) 192ifeq ($(CONFIG_PPC_E500MC),y) 193CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc) 194else 195CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc) 196endif 197endif 198 199asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1) 200 201KBUILD_CPPFLAGS += -Iarch/$(ARCH) $(asinstr) 202KBUILD_AFLAGS += -Iarch/$(ARCH) $(AFLAGS-y) 203KBUILD_CFLAGS += $(call cc-option,-msoft-float) 204KBUILD_CFLAGS += -pipe -Iarch/$(ARCH) $(CFLAGS-y) 205CPP = $(CC) -E $(KBUILD_CFLAGS) 206 207CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__ 208ifdef CONFIG_CPU_BIG_ENDIAN 209CHECKFLAGS += -D__BIG_ENDIAN__ 210else 211CHECKFLAGS += -D__LITTLE_ENDIAN__ 212endif 213 214ifeq ($(CONFIG_476FPE_ERR46),y) 215 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \ 216 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds 217endif 218 219# No AltiVec or VSX instructions when building kernel 220KBUILD_CFLAGS += $(call cc-option,-mno-altivec) 221KBUILD_CFLAGS += $(call cc-option,-mno-vsx) 222 223# No SPE instruction when building kernel 224# (We use all available options to help semi-broken compilers) 225KBUILD_CFLAGS += $(call cc-option,-mno-spe) 226KBUILD_CFLAGS += $(call cc-option,-mspe=no) 227 228# Enable unit-at-a-time mode when possible. It shrinks the 229# kernel considerably. 230KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time) 231 232# FIXME: the module load should be taught about the additional relocs 233# generated by this. 234# revert to pre-gcc-4.4 behaviour of .eh_frame 235KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm) 236 237# Never use string load/store instructions as they are 238# often slow when they are implemented at all 239KBUILD_CFLAGS += $(call cc-option,-mno-string) 240 241ifeq ($(CONFIG_6xx),y) 242KBUILD_CFLAGS += -mcpu=powerpc 243endif 244 245# Work around a gcc code-gen bug with -fno-omit-frame-pointer. 246ifeq ($(CONFIG_FUNCTION_TRACER),y) 247KBUILD_CFLAGS += -mno-sched-epilog 248endif 249 250cpu-as-$(CONFIG_4xx) += -Wa,-m405 251cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec) 252cpu-as-$(CONFIG_E200) += -Wa,-me200 253cpu-as-$(CONFIG_PPC_BOOK3S_64) += -Wa,-mpower4 254 255KBUILD_AFLAGS += $(cpu-as-y) 256KBUILD_CFLAGS += $(cpu-as-y) 257 258KBUILD_AFLAGS += $(aflags-y) 259KBUILD_CFLAGS += $(cflags-y) 260 261head-y := arch/powerpc/kernel/head_$(BITS).o 262head-$(CONFIG_PPC_8xx) := arch/powerpc/kernel/head_8xx.o 263head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o 264head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o 265head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o 266 267head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o 268head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o 269head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o 270head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o 271 272core-y += arch/powerpc/kernel/ \ 273 arch/powerpc/mm/ \ 274 arch/powerpc/lib/ \ 275 arch/powerpc/sysdev/ \ 276 arch/powerpc/platforms/ \ 277 arch/powerpc/math-emu/ \ 278 arch/powerpc/crypto/ \ 279 arch/powerpc/net/ 280core-$(CONFIG_XMON) += arch/powerpc/xmon/ 281core-$(CONFIG_KVM) += arch/powerpc/kvm/ 282core-$(CONFIG_PERF_EVENTS) += arch/powerpc/perf/ 283core-$(CONFIG_KEXEC_FILE) += arch/powerpc/purgatory/ 284 285drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/ 286 287# Default to zImage, override when needed 288all: zImage 289 290# With make 3.82 we cannot mix normal and wildcard targets 291BOOT_TARGETS1 := zImage zImage.initrd uImage 292BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.% 293 294PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2) 295 296boot := arch/$(ARCH)/boot 297 298$(BOOT_TARGETS1): vmlinux 299 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 300$(BOOT_TARGETS2): vmlinux 301 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 302 303 304bootwrapper_install: 305 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 306 307%.dtb: scripts 308 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 309 310# Used to create 'merged defconfigs' 311# To use it $(call) it with the first argument as the base defconfig 312# and the second argument as a space separated list of .config files to merge, 313# without the .config suffix. 314define merge_into_defconfig 315 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ 316 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \ 317 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config) 318 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 319endef 320 321PHONY += pseries_le_defconfig 322pseries_le_defconfig: 323 $(call merge_into_defconfig,pseries_defconfig,le) 324 325PHONY += ppc64le_defconfig 326ppc64le_defconfig: 327 $(call merge_into_defconfig,ppc64_defconfig,le) 328 329PHONY += powernv_be_defconfig 330powernv_be_defconfig: 331 $(call merge_into_defconfig,powernv_defconfig,be) 332 333PHONY += mpc85xx_defconfig 334mpc85xx_defconfig: 335 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\ 336 85xx-32bit 85xx-hw fsl-emb-nonhw) 337 338PHONY += mpc85xx_smp_defconfig 339mpc85xx_smp_defconfig: 340 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\ 341 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw) 342 343PHONY += corenet32_smp_defconfig 344corenet32_smp_defconfig: 345 $(call merge_into_defconfig,corenet_basic_defconfig,\ 346 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa) 347 348PHONY += corenet64_smp_defconfig 349corenet64_smp_defconfig: 350 $(call merge_into_defconfig,corenet_basic_defconfig,\ 351 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa) 352 353PHONY += mpc86xx_defconfig 354mpc86xx_defconfig: 355 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\ 356 86xx-hw fsl-emb-nonhw) 357 358PHONY += mpc86xx_smp_defconfig 359mpc86xx_smp_defconfig: 360 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\ 361 86xx-smp 86xx-hw fsl-emb-nonhw) 362 363define archhelp 364 @echo '* zImage - Build default images selected by kernel config' 365 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)' 366 @echo ' uImage - U-Boot native image format' 367 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older' 368 @echo ' versions which do not support device trees' 369 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob' 370 @echo ' simpleImage.<dt> - Firmware independent image.' 371 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)' 372 @echo ' install - Install kernel using' 373 @echo ' (your) ~/bin/$(INSTALLKERNEL) or' 374 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 375 @echo ' install to $$(INSTALL_PATH) and run lilo' 376 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs' 377 @echo '' 378 @echo ' Targets with <dt> embed a device tree blob inside the image' 379 @echo ' These targets support board with firmware that does not' 380 @echo ' support passing a device tree directly. Replace <dt> with the' 381 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory' 382 @echo ' (minus the .dts extension).' 383endef 384 385install: 386 $(Q)$(MAKE) $(build)=$(boot) install 387 388vdso_install: 389ifeq ($(CONFIG_PPC64),y) 390 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@ 391endif 392 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@ 393 394archclean: 395 $(Q)$(MAKE) $(clean)=$(boot) 396 397archprepare: checkbin 398 399# Use the file '.tmp_gas_check' for binutils tests, as gas won't output 400# to stdout and these checks are run even on install targets. 401TOUT := .tmp_gas_check 402 403# Check gcc and binutils versions: 404# - gcc-3.4 and binutils-2.14 are a fatal combination 405# - Require gcc 4.0 or above on 64-bit 406# - gcc-4.2.0 has issues compiling modules on 64-bit 407checkbin: 408 @if test "$(cc-name)" != "clang" \ 409 && test "$(cc-version)" = "0304" ; then \ 410 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \ 411 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \ 412 echo 'correctly with gcc-3.4 and your version of binutils.'; \ 413 echo '*** Please upgrade your binutils or downgrade your gcc'; \ 414 false; \ 415 fi ; \ 416 fi 417 @if test "$(cc-name)" != "clang" \ 418 && test "$(cc-version)" -lt "0400" \ 419 && test "x${CONFIG_PPC64}" = "xy" ; then \ 420 echo -n "Sorry, GCC v4.0 or above is required to build " ; \ 421 echo "the 64-bit powerpc kernel." ; \ 422 false ; \ 423 fi 424 @if test "$(cc-name)" != "clang" \ 425 && test "$(cc-fullversion)" = "040200" \ 426 && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \ 427 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \ 428 echo 'kernel with modules enabled.' ; \ 429 echo -n '*** Please use a different GCC version or ' ; \ 430 echo 'disable kernel modules' ; \ 431 false ; \ 432 fi 433 @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \ 434 && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \ 435 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \ 436 echo 'in some circumstances.' ; \ 437 echo -n '*** Please use a different binutils version.' ; \ 438 false ; \ 439 fi 440 441 442CLEAN_FILES += $(TOUT) 443 444