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 := $(shell uname -m)_defconfig 35else 36KBUILD_DEFCONFIG := ppc64_defconfig 37endif 38 39ifeq ($(CONFIG_PPC64),y) 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 77ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y) 78KBUILD_CFLAGS += -mlittle-endian 79LDFLAGS += -EL 80LDEMULATION := lppc 81GNUTARGET := powerpcle 82MULTIPLEWORD := -mno-multiple 83KBUILD_CFLAGS_MODULE += $(call cc-option,-mno-save-toc-indirect) 84else 85KBUILD_CFLAGS += $(call cc-option,-mbig-endian) 86LDFLAGS += -EB 87LDEMULATION := ppc 88GNUTARGET := powerpc 89MULTIPLEWORD := -mmultiple 90endif 91 92ifdef CONFIG_PPC64 93cflags-$(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 99ifneq ($(cc-name),clang) 100 cflags-$(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) 111LDFLAGS += -m elf$(BITS)$(LDEMULATION) 112KBUILD_ARFLAGS += --target=elf$(BITS)-$(GNUTARGET) 113endif 114 115LDFLAGS_vmlinux-y := -Bstatic 116LDFLAGS_vmlinux-$(CONFIG_RELOCATABLE) := -pie 117LDFLAGS_vmlinux := $(LDFLAGS_vmlinux-y) 118LDFLAGS_vmlinux += $(call ld-option,--orphan-handling=warn) 119 120ifeq ($(CONFIG_PPC64),y) 121ifeq ($(call cc-option-yn,-mcmodel=medium),y) 122 # -mcmodel=medium breaks modules because it uses 32bit offsets from 123 # the TOC pointer to create pointers where possible. Pointers into the 124 # percpu data area are created by this method. 125 # 126 # The kernel module loader relocates the percpu data section from the 127 # original location (starting with 0xd...) to somewhere in the base 128 # kernel percpu data space (starting with 0xc...). We need a full 129 # 64bit relocation for this to work, hence -mcmodel=large. 130 KBUILD_CFLAGS_MODULE += -mcmodel=large 131else 132 export NO_MINIMAL_TOC := -mno-minimal-toc 133endif 134endif 135 136CFLAGS-$(CONFIG_PPC64) := $(call cc-option,-mtraceback=no) 137ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y) 138CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc)) 139AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2) 140else 141CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1) 142CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc) 143AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1) 144endif 145CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc)) 146CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions) 147 148CFLAGS-$(CONFIG_PPC32) := -ffixed-r2 $(MULTIPLEWORD) 149CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata) 150 151ifeq ($(CONFIG_PPC_BOOK3S_64),y) 152ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y) 153CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8 154CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power9,-mtune=power8) 155else 156CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power7,$(call cc-option,-mtune=power5)) 157CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mcpu=power5,-mcpu=power4) 158endif 159else 160CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64 161endif 162 163ifdef CONFIG_MPROFILE_KERNEL 164 CC_FLAGS_FTRACE := -pg -mprofile-kernel 165endif 166 167CFLAGS-$(CONFIG_CELL_CPU) += $(call cc-option,-mcpu=cell) 168CFLAGS-$(CONFIG_POWER5_CPU) += $(call cc-option,-mcpu=power5) 169CFLAGS-$(CONFIG_POWER6_CPU) += $(call cc-option,-mcpu=power6) 170CFLAGS-$(CONFIG_POWER7_CPU) += $(call cc-option,-mcpu=power7) 171CFLAGS-$(CONFIG_POWER8_CPU) += $(call cc-option,-mcpu=power8) 172CFLAGS-$(CONFIG_POWER9_CPU) += $(call cc-option,-mcpu=power9) 173CFLAGS-$(CONFIG_PPC_8xx) += $(call cc-option,-mcpu=860) 174 175# Altivec option not allowed with e500mc64 in GCC. 176ifeq ($(CONFIG_ALTIVEC),y) 177E5500_CPU := -mcpu=powerpc64 178else 179E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64) 180endif 181CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU) 182CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU)) 183 184ifeq ($(CONFIG_PPC32),y) 185ifeq ($(CONFIG_PPC_E500MC),y) 186CFLAGS-y += $(call cc-option,-mcpu=e500mc,-mcpu=powerpc) 187else 188CFLAGS-$(CONFIG_E500) += $(call cc-option,-mcpu=8540 -msoft-float,-mcpu=powerpc) 189endif 190endif 191 192asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1) 193 194KBUILD_CPPFLAGS += -Iarch/$(ARCH) $(asinstr) 195KBUILD_AFLAGS += -Iarch/$(ARCH) $(AFLAGS-y) 196KBUILD_CFLAGS += $(call cc-option,-msoft-float) 197KBUILD_CFLAGS += -pipe -Iarch/$(ARCH) $(CFLAGS-y) 198CPP = $(CC) -E $(KBUILD_CFLAGS) 199 200CHECKFLAGS += -m$(BITS) -D__powerpc__ -D__powerpc$(BITS)__ 201ifdef CONFIG_CPU_BIG_ENDIAN 202CHECKFLAGS += -D__BIG_ENDIAN__ 203else 204CHECKFLAGS += -D__LITTLE_ENDIAN__ 205endif 206 207ifeq ($(CONFIG_476FPE_ERR46),y) 208 KBUILD_LDFLAGS_MODULE += --ppc476-workaround \ 209 -T $(srctree)/arch/powerpc/platforms/44x/ppc476_modules.lds 210endif 211 212# No AltiVec or VSX instructions when building kernel 213KBUILD_CFLAGS += $(call cc-option,-mno-altivec) 214KBUILD_CFLAGS += $(call cc-option,-mno-vsx) 215 216# No SPE instruction when building kernel 217# (We use all available options to help semi-broken compilers) 218KBUILD_CFLAGS += $(call cc-option,-mno-spe) 219KBUILD_CFLAGS += $(call cc-option,-mspe=no) 220 221# Enable unit-at-a-time mode when possible. It shrinks the 222# kernel considerably. 223KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time) 224 225# FIXME: the module load should be taught about the additional relocs 226# generated by this. 227# revert to pre-gcc-4.4 behaviour of .eh_frame 228KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm) 229 230# Never use string load/store instructions as they are 231# often slow when they are implemented at all 232KBUILD_CFLAGS += $(call cc-option,-mno-string) 233 234ifeq ($(CONFIG_6xx),y) 235KBUILD_CFLAGS += -mcpu=powerpc 236endif 237 238# Work around a gcc code-gen bug with -fno-omit-frame-pointer. 239ifeq ($(CONFIG_FUNCTION_TRACER),y) 240KBUILD_CFLAGS += -mno-sched-epilog 241endif 242 243cpu-as-$(CONFIG_4xx) += -Wa,-m405 244cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec) 245cpu-as-$(CONFIG_E200) += -Wa,-me200 246cpu-as-$(CONFIG_PPC_BOOK3S_64) += -Wa,-mpower4 247 248KBUILD_AFLAGS += $(cpu-as-y) 249KBUILD_CFLAGS += $(cpu-as-y) 250 251KBUILD_AFLAGS += $(aflags-y) 252KBUILD_CFLAGS += $(cflags-y) 253 254head-y := arch/powerpc/kernel/head_$(BITS).o 255head-$(CONFIG_PPC_8xx) := arch/powerpc/kernel/head_8xx.o 256head-$(CONFIG_40x) := arch/powerpc/kernel/head_40x.o 257head-$(CONFIG_44x) := arch/powerpc/kernel/head_44x.o 258head-$(CONFIG_FSL_BOOKE) := arch/powerpc/kernel/head_fsl_booke.o 259 260head-$(CONFIG_PPC64) += arch/powerpc/kernel/entry_64.o 261head-$(CONFIG_PPC_FPU) += arch/powerpc/kernel/fpu.o 262head-$(CONFIG_ALTIVEC) += arch/powerpc/kernel/vector.o 263head-$(CONFIG_PPC_OF_BOOT_TRAMPOLINE) += arch/powerpc/kernel/prom_init.o 264 265core-y += arch/powerpc/kernel/ \ 266 arch/powerpc/mm/ \ 267 arch/powerpc/lib/ \ 268 arch/powerpc/sysdev/ \ 269 arch/powerpc/platforms/ \ 270 arch/powerpc/math-emu/ \ 271 arch/powerpc/crypto/ \ 272 arch/powerpc/net/ 273core-$(CONFIG_XMON) += arch/powerpc/xmon/ 274core-$(CONFIG_KVM) += arch/powerpc/kvm/ 275core-$(CONFIG_PERF_EVENTS) += arch/powerpc/perf/ 276core-$(CONFIG_KEXEC_FILE) += arch/powerpc/purgatory/ 277 278drivers-$(CONFIG_OPROFILE) += arch/powerpc/oprofile/ 279 280# Default to zImage, override when needed 281all: zImage 282 283# With make 3.82 we cannot mix normal and wildcard targets 284BOOT_TARGETS1 := zImage zImage.initrd uImage 285BOOT_TARGETS2 := zImage% dtbImage% treeImage.% cuImage.% simpleImage.% uImage.% 286 287PHONY += $(BOOT_TARGETS1) $(BOOT_TARGETS2) 288 289boot := arch/$(ARCH)/boot 290 291$(BOOT_TARGETS1): vmlinux 292 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 293$(BOOT_TARGETS2): vmlinux 294 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 295 296 297bootwrapper_install: 298 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 299 300%.dtb: scripts 301 $(Q)$(MAKE) $(build)=$(boot) $(patsubst %,$(boot)/%,$@) 302 303# Used to create 'merged defconfigs' 304# To use it $(call) it with the first argument as the base defconfig 305# and the second argument as a space separated list of .config files to merge, 306# without the .config suffix. 307define merge_into_defconfig 308 $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ 309 -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \ 310 $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config) 311 +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig 312endef 313 314PHONY += pseries_le_defconfig 315pseries_le_defconfig: 316 $(call merge_into_defconfig,pseries_defconfig,le) 317 318PHONY += ppc64le_defconfig 319ppc64le_defconfig: 320 $(call merge_into_defconfig,ppc64_defconfig,le) 321 322PHONY += powernv_be_defconfig 323powernv_be_defconfig: 324 $(call merge_into_defconfig,powernv_defconfig,be) 325 326PHONY += mpc85xx_defconfig 327mpc85xx_defconfig: 328 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\ 329 85xx-32bit 85xx-hw fsl-emb-nonhw) 330 331PHONY += mpc85xx_smp_defconfig 332mpc85xx_smp_defconfig: 333 $(call merge_into_defconfig,mpc85xx_basic_defconfig,\ 334 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw) 335 336PHONY += corenet32_smp_defconfig 337corenet32_smp_defconfig: 338 $(call merge_into_defconfig,corenet_basic_defconfig,\ 339 85xx-32bit 85xx-smp 85xx-hw fsl-emb-nonhw dpaa) 340 341PHONY += corenet64_smp_defconfig 342corenet64_smp_defconfig: 343 $(call merge_into_defconfig,corenet_basic_defconfig,\ 344 85xx-64bit 85xx-smp altivec 85xx-hw fsl-emb-nonhw dpaa) 345 346PHONY += mpc86xx_defconfig 347mpc86xx_defconfig: 348 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\ 349 86xx-hw fsl-emb-nonhw) 350 351PHONY += mpc86xx_smp_defconfig 352mpc86xx_smp_defconfig: 353 $(call merge_into_defconfig,mpc86xx_basic_defconfig,\ 354 86xx-smp 86xx-hw fsl-emb-nonhw) 355 356define archhelp 357 @echo '* zImage - Build default images selected by kernel config' 358 @echo ' zImage.* - Compressed kernel image (arch/$(ARCH)/boot/zImage.*)' 359 @echo ' uImage - U-Boot native image format' 360 @echo ' cuImage.<dt> - Backwards compatible U-Boot image for older' 361 @echo ' versions which do not support device trees' 362 @echo ' dtbImage.<dt> - zImage with an embedded device tree blob' 363 @echo ' simpleImage.<dt> - Firmware independent image.' 364 @echo ' treeImage.<dt> - Support for older IBM 4xx firmware (not U-Boot)' 365 @echo ' install - Install kernel using' 366 @echo ' (your) ~/bin/$(INSTALLKERNEL) or' 367 @echo ' (distribution) /sbin/$(INSTALLKERNEL) or' 368 @echo ' install to $$(INSTALL_PATH) and run lilo' 369 @echo ' *_defconfig - Select default config from arch/$(ARCH)/configs' 370 @echo '' 371 @echo ' Targets with <dt> embed a device tree blob inside the image' 372 @echo ' These targets support board with firmware that does not' 373 @echo ' support passing a device tree directly. Replace <dt> with the' 374 @echo ' name of a dts file from the arch/$(ARCH)/boot/dts/ directory' 375 @echo ' (minus the .dts extension).' 376endef 377 378install: 379 $(Q)$(MAKE) $(build)=$(boot) install 380 381vdso_install: 382ifeq ($(CONFIG_PPC64),y) 383 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@ 384endif 385 $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@ 386 387archclean: 388 $(Q)$(MAKE) $(clean)=$(boot) 389 390archprepare: checkbin 391 392# Use the file '.tmp_gas_check' for binutils tests, as gas won't output 393# to stdout and these checks are run even on install targets. 394TOUT := .tmp_gas_check 395 396# Check gcc and binutils versions: 397# - gcc-3.4 and binutils-2.14 are a fatal combination 398# - Require gcc 4.0 or above on 64-bit 399# - gcc-4.2.0 has issues compiling modules on 64-bit 400checkbin: 401 @if test "$(cc-name)" != "clang" \ 402 && test "$(cc-version)" = "0304" ; then \ 403 if ! /bin/echo mftb 5 | $(AS) -v -mppc -many -o $(TOUT) >/dev/null 2>&1 ; then \ 404 echo -n '*** ${VERSION}.${PATCHLEVEL} kernels no longer build '; \ 405 echo 'correctly with gcc-3.4 and your version of binutils.'; \ 406 echo '*** Please upgrade your binutils or downgrade your gcc'; \ 407 false; \ 408 fi ; \ 409 fi 410 @if test "$(cc-name)" != "clang" \ 411 && test "$(cc-version)" -lt "0400" \ 412 && test "x${CONFIG_PPC64}" = "xy" ; then \ 413 echo -n "Sorry, GCC v4.0 or above is required to build " ; \ 414 echo "the 64-bit powerpc kernel." ; \ 415 false ; \ 416 fi 417 @if test "$(cc-name)" != "clang" \ 418 && test "$(cc-fullversion)" = "040200" \ 419 && test "x${CONFIG_MODULES}${CONFIG_PPC64}" = "xyy" ; then \ 420 echo -n '*** GCC-4.2.0 cannot compile the 64-bit powerpc ' ; \ 421 echo 'kernel with modules enabled.' ; \ 422 echo -n '*** Please use a different GCC version or ' ; \ 423 echo 'disable kernel modules' ; \ 424 false ; \ 425 fi 426 @if test "x${CONFIG_CPU_LITTLE_ENDIAN}" = "xy" \ 427 && $(LD) --version | head -1 | grep ' 2\.24$$' >/dev/null ; then \ 428 echo -n '*** binutils 2.24 miscompiles weak symbols ' ; \ 429 echo 'in some circumstances.' ; \ 430 echo -n '*** Please use a different binutils version.' ; \ 431 false ; \ 432 fi 433 434 435CLEAN_FILES += $(TOUT) 436 437